Federal Practitioner

Read Now

In this supplement to Federal Practitioner,
Dr. Raja Mudad, MD, discusses:

• The burden of squamous non-small cell lung cancer among active United States military and veterans
• Available treatment options for advanced metastatic squamous NSCLC
• Clinical trial data surrounding a treatment for patients with metastatic squamous NSCLC who have progressed after platinum-based chemotherapy, that can be used as early as second-line

(06/20) PC-US-115598

Read Now

Read Now

In this supplement to Federal Practitioner,
Dr. Raja Mudad, MD, discusses:

• The burden of squamous non-small cell lung cancer among active United States military and veterans
• Available treatment options for advanced metastatic squamous NSCLC
• Clinical trial data surrounding a treatment for patients with metastatic squamous NSCLC who have progressed after platinum-based chemotherapy, that can be used as early as second-line

(06/20) PC-US-115598

Read Now

Read Now

In this supplement to Federal Practitioner,
Dr. Raja Mudad, MD, discusses:

• The burden of squamous non-small cell lung cancer among active United States military and veterans
• Available treatment options for advanced metastatic squamous NSCLC
• Clinical trial data surrounding a treatment for patients with metastatic squamous NSCLC who have progressed after platinum-based chemotherapy, that can be used as early as second-line

(06/20) PC-US-115598

Read Now

Nearly half of hospitalized COVID-19 patients without a prior diabetes diagnosis have hyperglycemia, and the latter is an independent predictor of mortality at 28 days, new research indicates.

The findings, from a retrospective analysis of 605 patients with COVID-19 seen at two hospitals in Wuhan, China, were published online July 10 in Diabetologia by Sufei Wang, of the department of respiratory and critical care medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, and colleagues.

Several previous studies have demonstrated a link between hyperglycemia and worse outcomes in COVID-19, and at least one diabetes diagnosis, but this is the first to focus specifically on that group of patients.

Wang and colleagues found that a fasting blood glucose of 7.0 mmol/L (126 mg/dL) or greater on admission – present in 45.6% of those without a prior diabetes diagnosis – was an independent predictor of 28-day mortality.

Although A1c data weren’t analyzed, the population is believed to include both individuals with preexisting but undiagnosed diabetes and those without diabetes who have acute stress hyperglycemia.

“Glycemic testing and control should be recommended for all COVID-19 patients even if they do not have preexisting diabetes, as most COVID-19 patients are prone to glucose metabolic disorders,” they emphasized.

“Addressing elevated fasting blood glucose at an early stage can help clinicians better manage the condition and lower the mortality risk of COVID-19 patients,” Wang and colleagues noted.
 

Hyperglycemia predicts COVID-19 death, complications

The study involved consecutive patients with COVID-19 and definitive 28-day outcome and fasting blood glucose measurement on admission to two Wuhan-area hospitals between Jan. 24 to Feb. 10, 2020. A total of 605 patients did not have a previous diabetes diagnosis. They were a median age of 59 years and 53.2% were men.

Just over half, 54.4%, had a fasting blood glucose below 6.1 mmol/L (110.0 mg/dL). The rest had dysglycemia: 16.5% had a fasting blood glucose of 6.1-6.9 mmol/L (110-125 mg/dL), considered the prediabetes range, and 29.1% had a fasting blood glucose of 7 mmol/L (126 mg/dL) or above, the cutoff for diabetes.

“These results indicate that our study included both undiagnosed diabetic patients and nondiabetic patients with hyperglycemia caused by an acute blood glucose disorder,” the authors noted.

Over 28 days of hospitalization, 18.8% (114) of the patients died and 39.2% developed one or more in-hospital complications. 

The authors used the CRB-65 score, which assigns 1 point for each of four indicators – confusion, respiratory rate >30 breaths/min, systolic blood pressure ≤90 mm Hg or diastolic blood pressure ≤60 mm Hg, and age ≥65 years – to assess pneumonia severity.

Just over half, 55.2%, had a CRB-65 score of 0, 43.1% had a score of 1-2, and 1.7% had a score of 3-4.

In multivariable analysis, significant independent predictors of 28-day mortality were age (hazard ratio, 1.02), male sex (HR, 1.75), CRB-65 score 1-2 (HR, 2.68), CRB-65 score 3-4 (HR, 5.25), and fasting blood glucose ≥7.0 mmol/L (HR, 2.30).

Compared with patients with normal glucose (<6.1 mmol/L), 28-day mortality was twice as high (HR, 2.06) for those with a fasting blood glucose of 6.1-6.9 mmol/L and more than threefold higher for ≥7.0 mmol/L (HR, 3.54).

Pneumonia severity also predicted 28-day mortality, with hazard ratios of 4.35 and 13.80 for patients with CRB-65 scores of 1-2 and 3-4, respectively, compared with 0.

Inhospital complications, including acute respiratory distress syndrome or acute cardiac, kidney, or liver injury or cerebrovascular accident, occurred in 14.2%, 7.9%, and 17.0% of those in the lowest to highest fasting blood glucose groups.

Complications were more than twice as common in patients with a fasting blood glucose of 6.1-6.9 mmol/L (HR, 2.61) and four times more common (HR, 3.99) among those with a fasting blood glucose ≥7.0 mmol/L, compared with those with normoglycemia.

The study was supported by the National Natural Science Foundation of China and Major Projects of the National Science and Technology. The authors have reported no relevant financial relationships.

This article first appeared on Medscape.com.

Nearly half of hospitalized COVID-19 patients without a prior diabetes diagnosis have hyperglycemia, and the latter is an independent predictor of mortality at 28 days, new research indicates.

The findings, from a retrospective analysis of 605 patients with COVID-19 seen at two hospitals in Wuhan, China, were published online July 10 in Diabetologia by Sufei Wang, of the department of respiratory and critical care medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, and colleagues.

Several previous studies have demonstrated a link between hyperglycemia and worse outcomes in COVID-19, and at least one diabetes diagnosis, but this is the first to focus specifically on that group of patients.

Wang and colleagues found that a fasting blood glucose of 7.0 mmol/L (126 mg/dL) or greater on admission – present in 45.6% of those without a prior diabetes diagnosis – was an independent predictor of 28-day mortality.

Although A1c data weren’t analyzed, the population is believed to include both individuals with preexisting but undiagnosed diabetes and those without diabetes who have acute stress hyperglycemia.

“Glycemic testing and control should be recommended for all COVID-19 patients even if they do not have preexisting diabetes, as most COVID-19 patients are prone to glucose metabolic disorders,” they emphasized.

“Addressing elevated fasting blood glucose at an early stage can help clinicians better manage the condition and lower the mortality risk of COVID-19 patients,” Wang and colleagues noted.
 

Hyperglycemia predicts COVID-19 death, complications

The study involved consecutive patients with COVID-19 and definitive 28-day outcome and fasting blood glucose measurement on admission to two Wuhan-area hospitals between Jan. 24 to Feb. 10, 2020. A total of 605 patients did not have a previous diabetes diagnosis. They were a median age of 59 years and 53.2% were men.

Just over half, 54.4%, had a fasting blood glucose below 6.1 mmol/L (110.0 mg/dL). The rest had dysglycemia: 16.5% had a fasting blood glucose of 6.1-6.9 mmol/L (110-125 mg/dL), considered the prediabetes range, and 29.1% had a fasting blood glucose of 7 mmol/L (126 mg/dL) or above, the cutoff for diabetes.

“These results indicate that our study included both undiagnosed diabetic patients and nondiabetic patients with hyperglycemia caused by an acute blood glucose disorder,” the authors noted.

Over 28 days of hospitalization, 18.8% (114) of the patients died and 39.2% developed one or more in-hospital complications. 

The authors used the CRB-65 score, which assigns 1 point for each of four indicators – confusion, respiratory rate >30 breaths/min, systolic blood pressure ≤90 mm Hg or diastolic blood pressure ≤60 mm Hg, and age ≥65 years – to assess pneumonia severity.

Just over half, 55.2%, had a CRB-65 score of 0, 43.1% had a score of 1-2, and 1.7% had a score of 3-4.

In multivariable analysis, significant independent predictors of 28-day mortality were age (hazard ratio, 1.02), male sex (HR, 1.75), CRB-65 score 1-2 (HR, 2.68), CRB-65 score 3-4 (HR, 5.25), and fasting blood glucose ≥7.0 mmol/L (HR, 2.30).

Compared with patients with normal glucose (<6.1 mmol/L), 28-day mortality was twice as high (HR, 2.06) for those with a fasting blood glucose of 6.1-6.9 mmol/L and more than threefold higher for ≥7.0 mmol/L (HR, 3.54).

Pneumonia severity also predicted 28-day mortality, with hazard ratios of 4.35 and 13.80 for patients with CRB-65 scores of 1-2 and 3-4, respectively, compared with 0.

Inhospital complications, including acute respiratory distress syndrome or acute cardiac, kidney, or liver injury or cerebrovascular accident, occurred in 14.2%, 7.9%, and 17.0% of those in the lowest to highest fasting blood glucose groups.

Complications were more than twice as common in patients with a fasting blood glucose of 6.1-6.9 mmol/L (HR, 2.61) and four times more common (HR, 3.99) among those with a fasting blood glucose ≥7.0 mmol/L, compared with those with normoglycemia.

The study was supported by the National Natural Science Foundation of China and Major Projects of the National Science and Technology. The authors have reported no relevant financial relationships.

This article first appeared on Medscape.com.

Nearly half of hospitalized COVID-19 patients without a prior diabetes diagnosis have hyperglycemia, and the latter is an independent predictor of mortality at 28 days, new research indicates.

The findings, from a retrospective analysis of 605 patients with COVID-19 seen at two hospitals in Wuhan, China, were published online July 10 in Diabetologia by Sufei Wang, of the department of respiratory and critical care medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, and colleagues.

Several previous studies have demonstrated a link between hyperglycemia and worse outcomes in COVID-19, and at least one diabetes diagnosis, but this is the first to focus specifically on that group of patients.

Wang and colleagues found that a fasting blood glucose of 7.0 mmol/L (126 mg/dL) or greater on admission – present in 45.6% of those without a prior diabetes diagnosis – was an independent predictor of 28-day mortality.

Although A1c data weren’t analyzed, the population is believed to include both individuals with preexisting but undiagnosed diabetes and those without diabetes who have acute stress hyperglycemia.

“Glycemic testing and control should be recommended for all COVID-19 patients even if they do not have preexisting diabetes, as most COVID-19 patients are prone to glucose metabolic disorders,” they emphasized.

“Addressing elevated fasting blood glucose at an early stage can help clinicians better manage the condition and lower the mortality risk of COVID-19 patients,” Wang and colleagues noted.
 

Hyperglycemia predicts COVID-19 death, complications

The study involved consecutive patients with COVID-19 and definitive 28-day outcome and fasting blood glucose measurement on admission to two Wuhan-area hospitals between Jan. 24 to Feb. 10, 2020. A total of 605 patients did not have a previous diabetes diagnosis. They were a median age of 59 years and 53.2% were men.

Just over half, 54.4%, had a fasting blood glucose below 6.1 mmol/L (110.0 mg/dL). The rest had dysglycemia: 16.5% had a fasting blood glucose of 6.1-6.9 mmol/L (110-125 mg/dL), considered the prediabetes range, and 29.1% had a fasting blood glucose of 7 mmol/L (126 mg/dL) or above, the cutoff for diabetes.

“These results indicate that our study included both undiagnosed diabetic patients and nondiabetic patients with hyperglycemia caused by an acute blood glucose disorder,” the authors noted.

Over 28 days of hospitalization, 18.8% (114) of the patients died and 39.2% developed one or more in-hospital complications. 

The authors used the CRB-65 score, which assigns 1 point for each of four indicators – confusion, respiratory rate >30 breaths/min, systolic blood pressure ≤90 mm Hg or diastolic blood pressure ≤60 mm Hg, and age ≥65 years – to assess pneumonia severity.

Just over half, 55.2%, had a CRB-65 score of 0, 43.1% had a score of 1-2, and 1.7% had a score of 3-4.

In multivariable analysis, significant independent predictors of 28-day mortality were age (hazard ratio, 1.02), male sex (HR, 1.75), CRB-65 score 1-2 (HR, 2.68), CRB-65 score 3-4 (HR, 5.25), and fasting blood glucose ≥7.0 mmol/L (HR, 2.30).

Compared with patients with normal glucose (<6.1 mmol/L), 28-day mortality was twice as high (HR, 2.06) for those with a fasting blood glucose of 6.1-6.9 mmol/L and more than threefold higher for ≥7.0 mmol/L (HR, 3.54).

Pneumonia severity also predicted 28-day mortality, with hazard ratios of 4.35 and 13.80 for patients with CRB-65 scores of 1-2 and 3-4, respectively, compared with 0.

Inhospital complications, including acute respiratory distress syndrome or acute cardiac, kidney, or liver injury or cerebrovascular accident, occurred in 14.2%, 7.9%, and 17.0% of those in the lowest to highest fasting blood glucose groups.

Complications were more than twice as common in patients with a fasting blood glucose of 6.1-6.9 mmol/L (HR, 2.61) and four times more common (HR, 3.99) among those with a fasting blood glucose ≥7.0 mmol/L, compared with those with normoglycemia.

The study was supported by the National Natural Science Foundation of China and Major Projects of the National Science and Technology. The authors have reported no relevant financial relationships.

This article first appeared on Medscape.com.

The Food and Drug Administration has approved expanded use of Dysport to treat upper- and lower-limb spasticity – including that caused by cerebral palsy – for patients as young as 2 years and older, according to manufacturer Ipsen Biopharmaceuticals.

When Dysport (abobotulinumtoxinA) initially was approved for treating pediatric lower limb spasticity by the FDA in 2016, Ipsen was granted Orphan Drug exclusivity for children whose lower-limb spasticity was caused by cerebral palsy. In 2019, Dysport was approved by the FDA for treating of upper-limb spasticity in children 2 years older. But if that spasticity was caused by cerebral palsy, Dysport could be used to treat it only through Orphan Drug exclusivity granted to another manufacturer, according to an Ipsen press release.

“The proactive step to resolve the uncertainty created by the previous CP [cerebral palsy] carve out enables us as physicians to prescribe consistent therapy for pediatric patients experiencing both upper- and lower-limb spasticity,” Sarah Helen Evans, MD, division chief of rehabilitation medicine in the department of pediatrics at the Children’s Hospital of Philadelphia, said in the press release.

The most common adverse effects among children with lower-limb spasticity treated with Dysport were nasopharyngitis, cough, and pyrexia. Among children with upper-limb spasticity, the most common effects associated with Dysport treatment were upper respiratory tract infection and pharyngitis.

The press release also included a warning of the distant spread of the botulinum toxin from the area of injection hours to weeks afterward, causing symptoms including blurred vision, generalized muscle weakness, and swallowing and breathing difficulties that can be life threatening; there have been reports of death.

Suspected adverse effects can be reported to the FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

The Food and Drug Administration has approved expanded use of Dysport to treat upper- and lower-limb spasticity – including that caused by cerebral palsy – for patients as young as 2 years and older, according to manufacturer Ipsen Biopharmaceuticals.

When Dysport (abobotulinumtoxinA) initially was approved for treating pediatric lower limb spasticity by the FDA in 2016, Ipsen was granted Orphan Drug exclusivity for children whose lower-limb spasticity was caused by cerebral palsy. In 2019, Dysport was approved by the FDA for treating of upper-limb spasticity in children 2 years older. But if that spasticity was caused by cerebral palsy, Dysport could be used to treat it only through Orphan Drug exclusivity granted to another manufacturer, according to an Ipsen press release.

“The proactive step to resolve the uncertainty created by the previous CP [cerebral palsy] carve out enables us as physicians to prescribe consistent therapy for pediatric patients experiencing both upper- and lower-limb spasticity,” Sarah Helen Evans, MD, division chief of rehabilitation medicine in the department of pediatrics at the Children’s Hospital of Philadelphia, said in the press release.

The most common adverse effects among children with lower-limb spasticity treated with Dysport were nasopharyngitis, cough, and pyrexia. Among children with upper-limb spasticity, the most common effects associated with Dysport treatment were upper respiratory tract infection and pharyngitis.

The press release also included a warning of the distant spread of the botulinum toxin from the area of injection hours to weeks afterward, causing symptoms including blurred vision, generalized muscle weakness, and swallowing and breathing difficulties that can be life threatening; there have been reports of death.

Suspected adverse effects can be reported to the FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

The Food and Drug Administration has approved expanded use of Dysport to treat upper- and lower-limb spasticity – including that caused by cerebral palsy – for patients as young as 2 years and older, according to manufacturer Ipsen Biopharmaceuticals.

When Dysport (abobotulinumtoxinA) initially was approved for treating pediatric lower limb spasticity by the FDA in 2016, Ipsen was granted Orphan Drug exclusivity for children whose lower-limb spasticity was caused by cerebral palsy. In 2019, Dysport was approved by the FDA for treating of upper-limb spasticity in children 2 years older. But if that spasticity was caused by cerebral palsy, Dysport could be used to treat it only through Orphan Drug exclusivity granted to another manufacturer, according to an Ipsen press release.

“The proactive step to resolve the uncertainty created by the previous CP [cerebral palsy] carve out enables us as physicians to prescribe consistent therapy for pediatric patients experiencing both upper- and lower-limb spasticity,” Sarah Helen Evans, MD, division chief of rehabilitation medicine in the department of pediatrics at the Children’s Hospital of Philadelphia, said in the press release.

The most common adverse effects among children with lower-limb spasticity treated with Dysport were nasopharyngitis, cough, and pyrexia. Among children with upper-limb spasticity, the most common effects associated with Dysport treatment were upper respiratory tract infection and pharyngitis.

The press release also included a warning of the distant spread of the botulinum toxin from the area of injection hours to weeks afterward, causing symptoms including blurred vision, generalized muscle weakness, and swallowing and breathing difficulties that can be life threatening; there have been reports of death.

Suspected adverse effects can be reported to the FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

Two studies published this week in BMJ provide support for eating more fruits, vegetables, and whole grain foods to lower the risk of developing diabetes.

Lisovskaya/iStock/Getty Images Plus

In a pooled analysis of three large prospective American cohorts, people with the highest versus lowest total consumption of whole grain foods had a significantly lower risk of type 2 diabetes.

“These findings provide further support for the current recommendations of increasing whole grain consumption as part of a healthy diet for the prevention of type 2 diabetes,” wrote the authors led by Yang Hu, a doctoral student at Harvard School of Public Health, Boston.

Similarly, in a large European case-cohort study, people with higher values for plasma vitamin C and carotenoids (fruit and vegetable intake) had a lower incidence of type 2 diabetes.

“This study suggests that even a modest increase in fruit and vegetable intake could help to prevent type 2 diabetes ... regardless of whether the increase is among people with initially low or high intake,” wrote Ju-Sheng Zheng, PhD, University of Cambridge (England), and colleagues.
 

Individual whole grain foods

Previous studies have shown that high consumption of whole grains is associated with a lower risk of developing chronic diseases, including type 2 diabetes, cardiovascular disease, obesity, and some types of cancer, Mr. Hu and colleagues wrote.

Although research has shown that whole grain breakfast cereal and brown rice are linked with a lower risk of type 2 diabetes, the effect of other commonly consumed whole grain foods – which contain different amounts of dietary fiber, antioxidants, magnesium, and phytochemicals – has not been established.

Mr. Hu and colleagues analyzed pooled data from 158,259 U.S. women who participated in the Nurses’ Health Study (1984-2014) or the Nurses’ Health Study II (1991-2017) and 36,525 U.S. men who took part in the Health Professionals Follow-Up Study (1986-2016), who were free of diabetes, cardiovascular disease, and cancer.

Participants’ baseline consumption of seven types of whole grain foods – whole grain breakfast cereal, oatmeal, dark bread, brown rice, added bran, wheat germ, and popcorn – was based on self-replies to food frequency questionnaires.

During an average 24-year follow-up, 18,629 participants developed type 2 diabetes.

After adjusting for body mass index, lifestyle, and dietary risk factors, participants in the highest quintile of total whole grain consumption had a 29% lower risk of incident type 2 diabetes than those in the lowest quintile.

The most commonly consumed whole grain foods were whole grain cold breakfast cereal, dark bread, and popcorn.

Compared with eating less than one serving a month of whole grain cold breakfast cereal or dark bread, eating one or more servings a day was associated with a 19% and 21% lower risk of developing diabetes, respectively.

For popcorn, a J-shaped association was found for intake, where the risk of type 2 diabetes was not significantly raised until consumption exceeded about one serving a day, which led to about an 8% increased risk of developing diabetes – likely related to fat and sugar added to the popcorn, the researchers wrote.

For the less frequently consumed whole grain foods, compared with eating less than one serving a month of oatmeal, brown rice, added bran, or wheat germ, participants who ate two or more servings a week had a 21%, 12%, 15%, and 12% lower risk of developing type 2 diabetes, respectively.

Lean or overweight individuals had a greater decreased risk of diabetes with increased consumption of whole grain foods; however, because individuals with obesity have a higher risk of diabetes, even a small decrease in risk is still meaningful.

Limitations include the study was observational and may have had unknown confounders, and the results may not be generalizable to other populations, the authors note.
 

‘Five a day’ fruits and vegetables

Only one previous small published study from the United Kingdom has examined how blood levels of vitamin C and carotenoids are associated with incident type 2 diabetes, Dr. Zheng and colleagues wrote.

They investigated the relationship in 9,754 adults who developed new-onset type 2 diabetes and a comparison group of 13,662 adults who remained diabetes free during an average 9.7-year follow-up, from 340,234 participants in the European Prospective Investigation Into Cancer and Nutrition–InterAct study.

Participants were from Denmark, France, Germany, Italy, the Netherlands, Spain, Sweden, and the United Kingdom, and incident type 2 diabetes occurred between 1991 and 2007.

The researchers used high-performance liquid chromatography–ultraviolet methods to determine participants’ plasma levels of vitamin C and six carotenoids (alphta-carotene, beta-carotene, lycopene, lutein, zeaxanthin, beta-cryptoxanthin), which they used to calculate a composite biomarker score.

The recommendation to eat at least five fruits and vegetables a day corresponds to eating ≥400 g/day, according to Dr. Zheng and colleagues. The self-reported median fruit and vegetable intake in the current study was 274, 357, 396, 452, and 508 g/day from lowest to highest quintile.

After multivariable adjustment, higher levels of plasma vitamin C and carotenoids were associated with an 18% and 25% lower risk of incident type 2 diabetes per standard deviation, respectively.

Compared with patients whose vitamin C and carotenoid composite biomarker scores were in the lowest 20%, those with scores in the top 20% had half the risk of incident diabetes. Increasing fruit and vegetable consumption by 66 g/day was associated with a 25% lower risk of developing diabetes.

“These findings provide strong evidence from objectively measured biomarkers for the recommendation that fruit and vegetable intake should be increased to prevent type 2 diabetes,” according to the researchers.

However, consumption of fruits and vegetables remains far below guideline recommendations, they observed. “Although five portions a day of fruit and vegetables have been recommended for decades, in 2014-2015, 69% of U.K. adults ate fewer than this number, and this proportion is even higher in European adults (86%).”

Dr. Zheng and colleagues acknowledged that study limitations include those that are inherent with observational studies.

Although they could not distinguish between juice, fortified products, or whole foods, the analyses “were adjusted for vitamin supplement use, and suggest that as biomarkers of fruit and vegetable intake these findings endorse the consumption of fruit and vegetables, not that of supplements,” they maintained.

The study by Mr. Hu and colleagues was funded by the National Institutes of Health. The InterAct project was funded by the EU FP6 program. Biomarker measurements for vitamin C and carotenoids were funded by the InterAct project, EPIC-CVD project, MRC Cambridge Initiative, European Commission Framework Program 7, European Research Council, and National Institute for Health Research. Dr. Zheng has reported receiving funding from Westlake University and the EU Horizon 2020 program.

A version of this article originally appeared on Medscape.com.

Two studies published this week in BMJ provide support for eating more fruits, vegetables, and whole grain foods to lower the risk of developing diabetes.

Lisovskaya/iStock/Getty Images Plus

In a pooled analysis of three large prospective American cohorts, people with the highest versus lowest total consumption of whole grain foods had a significantly lower risk of type 2 diabetes.

“These findings provide further support for the current recommendations of increasing whole grain consumption as part of a healthy diet for the prevention of type 2 diabetes,” wrote the authors led by Yang Hu, a doctoral student at Harvard School of Public Health, Boston.

Similarly, in a large European case-cohort study, people with higher values for plasma vitamin C and carotenoids (fruit and vegetable intake) had a lower incidence of type 2 diabetes.

“This study suggests that even a modest increase in fruit and vegetable intake could help to prevent type 2 diabetes ... regardless of whether the increase is among people with initially low or high intake,” wrote Ju-Sheng Zheng, PhD, University of Cambridge (England), and colleagues.
 

Individual whole grain foods

Previous studies have shown that high consumption of whole grains is associated with a lower risk of developing chronic diseases, including type 2 diabetes, cardiovascular disease, obesity, and some types of cancer, Mr. Hu and colleagues wrote.

Although research has shown that whole grain breakfast cereal and brown rice are linked with a lower risk of type 2 diabetes, the effect of other commonly consumed whole grain foods – which contain different amounts of dietary fiber, antioxidants, magnesium, and phytochemicals – has not been established.

Mr. Hu and colleagues analyzed pooled data from 158,259 U.S. women who participated in the Nurses’ Health Study (1984-2014) or the Nurses’ Health Study II (1991-2017) and 36,525 U.S. men who took part in the Health Professionals Follow-Up Study (1986-2016), who were free of diabetes, cardiovascular disease, and cancer.

Participants’ baseline consumption of seven types of whole grain foods – whole grain breakfast cereal, oatmeal, dark bread, brown rice, added bran, wheat germ, and popcorn – was based on self-replies to food frequency questionnaires.

During an average 24-year follow-up, 18,629 participants developed type 2 diabetes.

After adjusting for body mass index, lifestyle, and dietary risk factors, participants in the highest quintile of total whole grain consumption had a 29% lower risk of incident type 2 diabetes than those in the lowest quintile.

The most commonly consumed whole grain foods were whole grain cold breakfast cereal, dark bread, and popcorn.

Compared with eating less than one serving a month of whole grain cold breakfast cereal or dark bread, eating one or more servings a day was associated with a 19% and 21% lower risk of developing diabetes, respectively.

For popcorn, a J-shaped association was found for intake, where the risk of type 2 diabetes was not significantly raised until consumption exceeded about one serving a day, which led to about an 8% increased risk of developing diabetes – likely related to fat and sugar added to the popcorn, the researchers wrote.

For the less frequently consumed whole grain foods, compared with eating less than one serving a month of oatmeal, brown rice, added bran, or wheat germ, participants who ate two or more servings a week had a 21%, 12%, 15%, and 12% lower risk of developing type 2 diabetes, respectively.

Lean or overweight individuals had a greater decreased risk of diabetes with increased consumption of whole grain foods; however, because individuals with obesity have a higher risk of diabetes, even a small decrease in risk is still meaningful.

Limitations include the study was observational and may have had unknown confounders, and the results may not be generalizable to other populations, the authors note.
 

‘Five a day’ fruits and vegetables

Only one previous small published study from the United Kingdom has examined how blood levels of vitamin C and carotenoids are associated with incident type 2 diabetes, Dr. Zheng and colleagues wrote.

They investigated the relationship in 9,754 adults who developed new-onset type 2 diabetes and a comparison group of 13,662 adults who remained diabetes free during an average 9.7-year follow-up, from 340,234 participants in the European Prospective Investigation Into Cancer and Nutrition–InterAct study.

Participants were from Denmark, France, Germany, Italy, the Netherlands, Spain, Sweden, and the United Kingdom, and incident type 2 diabetes occurred between 1991 and 2007.

The researchers used high-performance liquid chromatography–ultraviolet methods to determine participants’ plasma levels of vitamin C and six carotenoids (alphta-carotene, beta-carotene, lycopene, lutein, zeaxanthin, beta-cryptoxanthin), which they used to calculate a composite biomarker score.

The recommendation to eat at least five fruits and vegetables a day corresponds to eating ≥400 g/day, according to Dr. Zheng and colleagues. The self-reported median fruit and vegetable intake in the current study was 274, 357, 396, 452, and 508 g/day from lowest to highest quintile.

After multivariable adjustment, higher levels of plasma vitamin C and carotenoids were associated with an 18% and 25% lower risk of incident type 2 diabetes per standard deviation, respectively.

Compared with patients whose vitamin C and carotenoid composite biomarker scores were in the lowest 20%, those with scores in the top 20% had half the risk of incident diabetes. Increasing fruit and vegetable consumption by 66 g/day was associated with a 25% lower risk of developing diabetes.

“These findings provide strong evidence from objectively measured biomarkers for the recommendation that fruit and vegetable intake should be increased to prevent type 2 diabetes,” according to the researchers.

However, consumption of fruits and vegetables remains far below guideline recommendations, they observed. “Although five portions a day of fruit and vegetables have been recommended for decades, in 2014-2015, 69% of U.K. adults ate fewer than this number, and this proportion is even higher in European adults (86%).”

Dr. Zheng and colleagues acknowledged that study limitations include those that are inherent with observational studies.

Although they could not distinguish between juice, fortified products, or whole foods, the analyses “were adjusted for vitamin supplement use, and suggest that as biomarkers of fruit and vegetable intake these findings endorse the consumption of fruit and vegetables, not that of supplements,” they maintained.

The study by Mr. Hu and colleagues was funded by the National Institutes of Health. The InterAct project was funded by the EU FP6 program. Biomarker measurements for vitamin C and carotenoids were funded by the InterAct project, EPIC-CVD project, MRC Cambridge Initiative, European Commission Framework Program 7, European Research Council, and National Institute for Health Research. Dr. Zheng has reported receiving funding from Westlake University and the EU Horizon 2020 program.

A version of this article originally appeared on Medscape.com.

Two studies published this week in BMJ provide support for eating more fruits, vegetables, and whole grain foods to lower the risk of developing diabetes.

Lisovskaya/iStock/Getty Images Plus

In a pooled analysis of three large prospective American cohorts, people with the highest versus lowest total consumption of whole grain foods had a significantly lower risk of type 2 diabetes.

“These findings provide further support for the current recommendations of increasing whole grain consumption as part of a healthy diet for the prevention of type 2 diabetes,” wrote the authors led by Yang Hu, a doctoral student at Harvard School of Public Health, Boston.

Similarly, in a large European case-cohort study, people with higher values for plasma vitamin C and carotenoids (fruit and vegetable intake) had a lower incidence of type 2 diabetes.

“This study suggests that even a modest increase in fruit and vegetable intake could help to prevent type 2 diabetes ... regardless of whether the increase is among people with initially low or high intake,” wrote Ju-Sheng Zheng, PhD, University of Cambridge (England), and colleagues.
 

Individual whole grain foods

Previous studies have shown that high consumption of whole grains is associated with a lower risk of developing chronic diseases, including type 2 diabetes, cardiovascular disease, obesity, and some types of cancer, Mr. Hu and colleagues wrote.

Although research has shown that whole grain breakfast cereal and brown rice are linked with a lower risk of type 2 diabetes, the effect of other commonly consumed whole grain foods – which contain different amounts of dietary fiber, antioxidants, magnesium, and phytochemicals – has not been established.

Mr. Hu and colleagues analyzed pooled data from 158,259 U.S. women who participated in the Nurses’ Health Study (1984-2014) or the Nurses’ Health Study II (1991-2017) and 36,525 U.S. men who took part in the Health Professionals Follow-Up Study (1986-2016), who were free of diabetes, cardiovascular disease, and cancer.

Participants’ baseline consumption of seven types of whole grain foods – whole grain breakfast cereal, oatmeal, dark bread, brown rice, added bran, wheat germ, and popcorn – was based on self-replies to food frequency questionnaires.

During an average 24-year follow-up, 18,629 participants developed type 2 diabetes.

After adjusting for body mass index, lifestyle, and dietary risk factors, participants in the highest quintile of total whole grain consumption had a 29% lower risk of incident type 2 diabetes than those in the lowest quintile.

The most commonly consumed whole grain foods were whole grain cold breakfast cereal, dark bread, and popcorn.

Compared with eating less than one serving a month of whole grain cold breakfast cereal or dark bread, eating one or more servings a day was associated with a 19% and 21% lower risk of developing diabetes, respectively.

For popcorn, a J-shaped association was found for intake, where the risk of type 2 diabetes was not significantly raised until consumption exceeded about one serving a day, which led to about an 8% increased risk of developing diabetes – likely related to fat and sugar added to the popcorn, the researchers wrote.

For the less frequently consumed whole grain foods, compared with eating less than one serving a month of oatmeal, brown rice, added bran, or wheat germ, participants who ate two or more servings a week had a 21%, 12%, 15%, and 12% lower risk of developing type 2 diabetes, respectively.

Lean or overweight individuals had a greater decreased risk of diabetes with increased consumption of whole grain foods; however, because individuals with obesity have a higher risk of diabetes, even a small decrease in risk is still meaningful.

Limitations include the study was observational and may have had unknown confounders, and the results may not be generalizable to other populations, the authors note.
 

‘Five a day’ fruits and vegetables

Only one previous small published study from the United Kingdom has examined how blood levels of vitamin C and carotenoids are associated with incident type 2 diabetes, Dr. Zheng and colleagues wrote.

They investigated the relationship in 9,754 adults who developed new-onset type 2 diabetes and a comparison group of 13,662 adults who remained diabetes free during an average 9.7-year follow-up, from 340,234 participants in the European Prospective Investigation Into Cancer and Nutrition–InterAct study.

Participants were from Denmark, France, Germany, Italy, the Netherlands, Spain, Sweden, and the United Kingdom, and incident type 2 diabetes occurred between 1991 and 2007.

The researchers used high-performance liquid chromatography–ultraviolet methods to determine participants’ plasma levels of vitamin C and six carotenoids (alphta-carotene, beta-carotene, lycopene, lutein, zeaxanthin, beta-cryptoxanthin), which they used to calculate a composite biomarker score.

The recommendation to eat at least five fruits and vegetables a day corresponds to eating ≥400 g/day, according to Dr. Zheng and colleagues. The self-reported median fruit and vegetable intake in the current study was 274, 357, 396, 452, and 508 g/day from lowest to highest quintile.

After multivariable adjustment, higher levels of plasma vitamin C and carotenoids were associated with an 18% and 25% lower risk of incident type 2 diabetes per standard deviation, respectively.

Compared with patients whose vitamin C and carotenoid composite biomarker scores were in the lowest 20%, those with scores in the top 20% had half the risk of incident diabetes. Increasing fruit and vegetable consumption by 66 g/day was associated with a 25% lower risk of developing diabetes.

“These findings provide strong evidence from objectively measured biomarkers for the recommendation that fruit and vegetable intake should be increased to prevent type 2 diabetes,” according to the researchers.

However, consumption of fruits and vegetables remains far below guideline recommendations, they observed. “Although five portions a day of fruit and vegetables have been recommended for decades, in 2014-2015, 69% of U.K. adults ate fewer than this number, and this proportion is even higher in European adults (86%).”

Dr. Zheng and colleagues acknowledged that study limitations include those that are inherent with observational studies.

Although they could not distinguish between juice, fortified products, or whole foods, the analyses “were adjusted for vitamin supplement use, and suggest that as biomarkers of fruit and vegetable intake these findings endorse the consumption of fruit and vegetables, not that of supplements,” they maintained.

The study by Mr. Hu and colleagues was funded by the National Institutes of Health. The InterAct project was funded by the EU FP6 program. Biomarker measurements for vitamin C and carotenoids were funded by the InterAct project, EPIC-CVD project, MRC Cambridge Initiative, European Commission Framework Program 7, European Research Council, and National Institute for Health Research. Dr. Zheng has reported receiving funding from Westlake University and the EU Horizon 2020 program.

A version of this article originally appeared on Medscape.com.

BRCA carrier status alone should not influence screening recommendations for colorectal cancer or pancreatic ductal adenocarcinoma, according to an American Gastroenterological Association clinical practice update.

Relationships between BRCA carrier status and risks of pancreatic ductal adenocarcinoma (PDAC) and colorectal cancer (CRC) remain unclear, reported lead author Sonia S. Kupfer, MD, AGAF, of the University of Chicago, and colleagues.

“Pathogenic variants in BRCA1 and BRCA2 have ... been associated with variable risk of GI cancer, including CRC, PDAC, biliary, and gastric cancers,” the investigators wrote in Gastroenterology. “However, the magnitude of GI cancer risks is not well established and there is minimal evidence or guidance on screening for GI cancers among BRCA1 and BRCA2 carriers.”

According to the investigators, personalized screening for CRC is well supported by evidence, as higher-risk individuals, such as those with a family history of CRC, have been shown to benefit from earlier and more frequent colonoscopies. Although the value of risk-based screening is less clear for other types of GI cancer, the investigators cited a growing body of evidence that supports screening individuals at high risk of PDAC.

Still, data illuminating the role of BRCA carrier status are relatively scarce, which has led to variability in clinical practice.

“Lack of accurate CRC and PDAC risk estimates in BRCA1 and BRCA2 leave physicians and patients without guidance, and result in a range of screening recommendations and practices in this population,” wrote Dr. Kupfer and colleagues.

To offer some clarity, they drafted the present clinical practice update on behalf of the AGA. The recommendations are framed within a discussion of relevant publications.

Data from multiple studies, for instance, suggest that BRCA pathogenic variants are found in 1.3% of patients with early-onset CRC, 0.2% of those with high-risk CRC, and 1.0% of those with any type of CRC, all of which are higher rates “than would be expected by chance.

“However,” the investigators added, “this association is not proof that the observed BRCA1 and BRCA2 pathogenic variants play a causative role in CRC.”

The investigators went on to discuss a 2018 meta-analysis by Oho et al., which included 14 studies evaluating risk of CRC among BRCA carriers. The analysis found that BRCA carriers had a 24% increased risk of CRC, which Dr. Kupfer and colleagues described as “small but statistically significant.” Subgroup analysis suggested that BRCA1 carriers drove this association, with a 49% increased risk of CRC, whereas no significant link was found with BRCA2.

Dr. Kupfer and colleagues described the 49% increase as “very modest,” and therefore insufficient to warrant more intensive screening, particularly when considered in the context of other risk factors, such as Lynch syndrome, which may entail a 1,600% increased risk of CRC. For PDAC, no such meta-analysis has been conducted; however, multiple studies have pointed to associations between BRCA and risk of PDAC.

For example, a 2018 case-control study by Hu et al. showed that BRCA1 and BRCA2 had relative prevalence rates of 0.59% and 1.95% among patients with PDAC. These rates translated to a 158% increased risk of PDAC for BRCA1, and a 520% increase risk for BRCA2; but Dr. Kupfer and colleagues noted that the BRCA2 carriers were from high-risk families, so the findings may not extend to the general population.

In light of these findings, the update recommends PDAC screening for BRCA carriers only if they have a family history of PDAC, with the caveat that the association between risk and degree of family involvement remains unknown.

Ultimately, for both CRC and PDAC, the investigators called for further BRCA research, based on the conclusion that “results from published studies provide inconsistent levels of evidence.”

The investigators reported no conflicts of interest.

SOURCE: Kupfer SS et al. Gastroenterology. 2020 Apr 23. doi: 10.1053/j.gastro.2020.03.086.

BRCA carrier status alone should not influence screening recommendations for colorectal cancer or pancreatic ductal adenocarcinoma, according to an American Gastroenterological Association clinical practice update.

Relationships between BRCA carrier status and risks of pancreatic ductal adenocarcinoma (PDAC) and colorectal cancer (CRC) remain unclear, reported lead author Sonia S. Kupfer, MD, AGAF, of the University of Chicago, and colleagues.

“Pathogenic variants in BRCA1 and BRCA2 have ... been associated with variable risk of GI cancer, including CRC, PDAC, biliary, and gastric cancers,” the investigators wrote in Gastroenterology. “However, the magnitude of GI cancer risks is not well established and there is minimal evidence or guidance on screening for GI cancers among BRCA1 and BRCA2 carriers.”

According to the investigators, personalized screening for CRC is well supported by evidence, as higher-risk individuals, such as those with a family history of CRC, have been shown to benefit from earlier and more frequent colonoscopies. Although the value of risk-based screening is less clear for other types of GI cancer, the investigators cited a growing body of evidence that supports screening individuals at high risk of PDAC.

Still, data illuminating the role of BRCA carrier status are relatively scarce, which has led to variability in clinical practice.

“Lack of accurate CRC and PDAC risk estimates in BRCA1 and BRCA2 leave physicians and patients without guidance, and result in a range of screening recommendations and practices in this population,” wrote Dr. Kupfer and colleagues.

To offer some clarity, they drafted the present clinical practice update on behalf of the AGA. The recommendations are framed within a discussion of relevant publications.

Data from multiple studies, for instance, suggest that BRCA pathogenic variants are found in 1.3% of patients with early-onset CRC, 0.2% of those with high-risk CRC, and 1.0% of those with any type of CRC, all of which are higher rates “than would be expected by chance.

“However,” the investigators added, “this association is not proof that the observed BRCA1 and BRCA2 pathogenic variants play a causative role in CRC.”

The investigators went on to discuss a 2018 meta-analysis by Oho et al., which included 14 studies evaluating risk of CRC among BRCA carriers. The analysis found that BRCA carriers had a 24% increased risk of CRC, which Dr. Kupfer and colleagues described as “small but statistically significant.” Subgroup analysis suggested that BRCA1 carriers drove this association, with a 49% increased risk of CRC, whereas no significant link was found with BRCA2.

Dr. Kupfer and colleagues described the 49% increase as “very modest,” and therefore insufficient to warrant more intensive screening, particularly when considered in the context of other risk factors, such as Lynch syndrome, which may entail a 1,600% increased risk of CRC. For PDAC, no such meta-analysis has been conducted; however, multiple studies have pointed to associations between BRCA and risk of PDAC.

For example, a 2018 case-control study by Hu et al. showed that BRCA1 and BRCA2 had relative prevalence rates of 0.59% and 1.95% among patients with PDAC. These rates translated to a 158% increased risk of PDAC for BRCA1, and a 520% increase risk for BRCA2; but Dr. Kupfer and colleagues noted that the BRCA2 carriers were from high-risk families, so the findings may not extend to the general population.

In light of these findings, the update recommends PDAC screening for BRCA carriers only if they have a family history of PDAC, with the caveat that the association between risk and degree of family involvement remains unknown.

Ultimately, for both CRC and PDAC, the investigators called for further BRCA research, based on the conclusion that “results from published studies provide inconsistent levels of evidence.”

The investigators reported no conflicts of interest.

SOURCE: Kupfer SS et al. Gastroenterology. 2020 Apr 23. doi: 10.1053/j.gastro.2020.03.086.

BRCA carrier status alone should not influence screening recommendations for colorectal cancer or pancreatic ductal adenocarcinoma, according to an American Gastroenterological Association clinical practice update.

Relationships between BRCA carrier status and risks of pancreatic ductal adenocarcinoma (PDAC) and colorectal cancer (CRC) remain unclear, reported lead author Sonia S. Kupfer, MD, AGAF, of the University of Chicago, and colleagues.

“Pathogenic variants in BRCA1 and BRCA2 have ... been associated with variable risk of GI cancer, including CRC, PDAC, biliary, and gastric cancers,” the investigators wrote in Gastroenterology. “However, the magnitude of GI cancer risks is not well established and there is minimal evidence or guidance on screening for GI cancers among BRCA1 and BRCA2 carriers.”

According to the investigators, personalized screening for CRC is well supported by evidence, as higher-risk individuals, such as those with a family history of CRC, have been shown to benefit from earlier and more frequent colonoscopies. Although the value of risk-based screening is less clear for other types of GI cancer, the investigators cited a growing body of evidence that supports screening individuals at high risk of PDAC.

Still, data illuminating the role of BRCA carrier status are relatively scarce, which has led to variability in clinical practice.

“Lack of accurate CRC and PDAC risk estimates in BRCA1 and BRCA2 leave physicians and patients without guidance, and result in a range of screening recommendations and practices in this population,” wrote Dr. Kupfer and colleagues.

To offer some clarity, they drafted the present clinical practice update on behalf of the AGA. The recommendations are framed within a discussion of relevant publications.

Data from multiple studies, for instance, suggest that BRCA pathogenic variants are found in 1.3% of patients with early-onset CRC, 0.2% of those with high-risk CRC, and 1.0% of those with any type of CRC, all of which are higher rates “than would be expected by chance.

“However,” the investigators added, “this association is not proof that the observed BRCA1 and BRCA2 pathogenic variants play a causative role in CRC.”

The investigators went on to discuss a 2018 meta-analysis by Oho et al., which included 14 studies evaluating risk of CRC among BRCA carriers. The analysis found that BRCA carriers had a 24% increased risk of CRC, which Dr. Kupfer and colleagues described as “small but statistically significant.” Subgroup analysis suggested that BRCA1 carriers drove this association, with a 49% increased risk of CRC, whereas no significant link was found with BRCA2.

Dr. Kupfer and colleagues described the 49% increase as “very modest,” and therefore insufficient to warrant more intensive screening, particularly when considered in the context of other risk factors, such as Lynch syndrome, which may entail a 1,600% increased risk of CRC. For PDAC, no such meta-analysis has been conducted; however, multiple studies have pointed to associations between BRCA and risk of PDAC.

For example, a 2018 case-control study by Hu et al. showed that BRCA1 and BRCA2 had relative prevalence rates of 0.59% and 1.95% among patients with PDAC. These rates translated to a 158% increased risk of PDAC for BRCA1, and a 520% increase risk for BRCA2; but Dr. Kupfer and colleagues noted that the BRCA2 carriers were from high-risk families, so the findings may not extend to the general population.

In light of these findings, the update recommends PDAC screening for BRCA carriers only if they have a family history of PDAC, with the caveat that the association between risk and degree of family involvement remains unknown.

Ultimately, for both CRC and PDAC, the investigators called for further BRCA research, based on the conclusion that “results from published studies provide inconsistent levels of evidence.”

The investigators reported no conflicts of interest.

SOURCE: Kupfer SS et al. Gastroenterology. 2020 Apr 23. doi: 10.1053/j.gastro.2020.03.086.

Injections of cabotegravir (ViiV Healthcare) given every other month are more effective in blocking HIV transmission than is the once-a-day combination of tenofovir disoproxil fumarate and emtricitabine (Truvada, Gilead Science), new data from the HPTN 083 trial show.

The findings “could transform the HIV prevention landscape for so many people,” said Megan Coleman, DNP, from Whitman-Walker Health in Washington, DC, who regularly prescribes Truvada as pre-exposure prophylaxis (PrEP).

At Whitman-Walker alone, about 3000 people were taking the pill in early 2020, but “for some people, taking a pill every day just isn’t a viable option,” said Coleman. “To have something that can support a patient’s choice and a patient’s ability to reduce their own risk of HIV is amazing.”

Final results from the trial — which looked at the drug in cisgender men and transgender women who have sex with men — were presented at the International AIDS Conference 2020.
 

Early Study Termination

Half of the 4566 study participants — from 43 sites in Africa, Asia, Latin America, and the United States — were younger than 30 years, 12.4% were transgender women, 29.7% were black, and 46.1% were Hispanic.

By design, ViiV Healthcare, the study sponsor, required that 50% of American participants be black to reflect the population at risk for HIV in the United States, said Raphael Landovitz, MD, from the UCLA David Geffen School of Medicine in Los Angeles, who is protocol chair for HPTN 083. In fact, 49.7% of the American cohort was black and 17.8% was Hispanic.

Patients randomized to the cabotegravir group received daily oral cabotegravir plus daily oral placebo for 5 weeks, to assess safety, followed by a cabotegravir injection at weeks 5 and 9 and every 2 months thereafter out to week 153 plus daily oral placebo. Patients randomized to the Truvada group received daily oral Truvada plus daily oral placebo for 5 weeks, followed by daily oral Truvada plus placebo injection, on the same schedule, out to week 153.

After the final injection, all participants continued on daily oral Truvada for 48 weeks.

The researchers expected to wait until 172 participants acquired HIV; they decided at the outset that this number would be sufficient to power a decision on whether or not cabotegravir injections are better than daily oral Truvada. But by May 2020, when 52 of the study participants had acquired HIV, the results were so lopsided in favor of cabotegravir that the trial was stopped. At that point, all participants were offered cabotegravir injections every 2 months.

Thirty-nine of the 52 (75%) new HIV infections occurred in the Truvada group. In fact, people in the cabotegravir group were less likely to acquire HIV than those in the Truvada group (hazard ratio, 0.34).

“This definitively establishes the superiority of cabotegravir,” said Landovitz.

He and his colleagues had been legitimately concerned that HIV acquisition would be so low in the trial that they wouldn’t be able to show how effective the injectable was. The success of Truvada PrEP has made it difficult to design prevention trials.

“We know that Truvada works extremely well, so the fact that we were able to show that cabotegravir in this population works better” is a powerful observation, said Landovitz. This is especially true because the rates of sexually transmitted infections — which are thought to increase risk for HIV transmission — were so high. Overall, 16.5% of the participants tested positive for syphilis during the trial, 13.3% tested positive for gonorrhea, and 21.1% tested positive for Chlamydia.
 

Five Surprising Seroconversions

Eleven of the 15 HIV infections in the cabotegravir group occurred in people who had received at least one injection. Three of these infections actually occurred during the first 5 weeks of the study when participants were taking oral cabotegravir, two occurred when participants chose to discontinue the injection and return to daily oral Truvada, and one occurred after a participant missed the injection for a prolonged period of time.

But five of the transmissions occurred in participants who appeared to be perfectly adherent.

Landovitz offered a number of possible reasons for this surprising finding.

“Number one could be that there’s something about these five particular individuals such that they grind up and eliminate the cabotegravir faster than other people, so an 8-week interval is too long for them,” he explained. “Another possibility, although pretty rare, is that there is a rare circulating virus that is intrinsically resistant to cabotegravir.”

Breakthrough HIV transmissions have been rare in people taking oral PrEP.

Disruptions caused by the COVID-19 pandemic have meant that the researchers don’t yet have the data on drug-resistant mutations or drug levels for these five participants, but they will.

“I suspect the truth is that there will never be a 100% failsafe HIV prevention mechanism,” said Landovitz.
 

“Impressive” Findings

The findings were greeted with excitement, although questions remain.

They are “impressive,” especially the data on black and Hispanic participants, said Paul Sax, MD, medical director of the Division of Infectious Diseases at Brigham and Women’s Hospital in Boston.

However, he said he is interested in the data showing that although participants in both groups gained weight during the study, there was early weight loss in the Truvada group, meaning that those in the cabotegravir group weighed more at the end of the study than those in the Truvada group.

“I’ve been watching the data on weight with integrase inhibitors,” he explained, including weight data specific to Truvada and to the combination of emtricitabine and tenofovir alafenamide (Descovy, Gilead). It looks like Truvada “has some sort of weight-suppressive effects. That’s going to be a thing we’re going to have to watch.”

Coleman said she is already thinking about patients at Whitman-Walker who might do well on cabotegravir and those who can start PrEP for the first time with this option.

“Not only would people probably switch to this option, but maybe people would be interested in starting a biomedical prevention approach that isn’t a pill every day,” she said. “It’s just exciting to have another option. Hopefully, in a few years, we’ll have implantable devices and rings; I can’t even imagine what all those brilliant minds are coming up with.”

But that’s still a ways off. First, cabotegravir has yet to be approved for HIV prevention, and ideally, eventually, there will be a way to determine if cabotegravir is safe for each patient that doesn’t involve a month of daily pills.

“We need to solve that problem because it’s so complicated to do an oral lead-in for a month or so,” said Carl Dieffenbach, PhD, director of the Division of AIDS at the National Institute of Allergy and Infectious Diseases, National Institutes of Health. “Otherwise it’s not going to be feasible.”

We need to make sure this gets licensed for men and women and transgender individuals.

Even with these positive data, Dieffenbach and other officials are not keen to have ViiV apply for licensing right away. Last October, Descovy was the second oral PrEP pill approved for HIV prevention, but only for use by gay men and transgender women — it hadn’t been well studied in cisgender women — causing an outcry. Now, officials are suggesting that ViiV not make the same mistake.

They are urging the company to hold off until data from the sister study of the medication in women — HPTN 084 — is completed in 2022.

“We need to make sure this gets licensed for men and women and transgender individuals,” Dieffenbach told Medscape Medical News. “We just need to give this a little more time and then build a plan with contingencies, so that if something happens, we still have collected all the safety data in women so we can say it’s safe.”
 

ViiV seems to be making such a plan.

“Our goal is to seek approval across all genders and we will work with the FDA and other regulatory agencies to map out a plan to achieve this goal,” said Kimberly Smith, MD, head of research and development at ViiV Healthcare.

The World Health Organization (WHO), meanwhile, doesn’t expect to change its guidelines on HIV prevention medications until data from HPTN 084 are reported.

“What’s important when we look at guidelines is that we also look across populations,” said Meg Doherty, coordinator of treatment and care in the Department of HIV/AIDS at WHO. “We’re waiting to know more about how cabotegravir works in women, because we certainly want to have prevention drugs that can be used in men and women at different age ranges and, ideally, during pregnancy.”

International AIDS Conference 2020: Abstracts OAXLB01. Presented July 8, 2020.
 

This article first appeared on Medscape.com.

Injections of cabotegravir (ViiV Healthcare) given every other month are more effective in blocking HIV transmission than is the once-a-day combination of tenofovir disoproxil fumarate and emtricitabine (Truvada, Gilead Science), new data from the HPTN 083 trial show.

The findings “could transform the HIV prevention landscape for so many people,” said Megan Coleman, DNP, from Whitman-Walker Health in Washington, DC, who regularly prescribes Truvada as pre-exposure prophylaxis (PrEP).

At Whitman-Walker alone, about 3000 people were taking the pill in early 2020, but “for some people, taking a pill every day just isn’t a viable option,” said Coleman. “To have something that can support a patient’s choice and a patient’s ability to reduce their own risk of HIV is amazing.”

Final results from the trial — which looked at the drug in cisgender men and transgender women who have sex with men — were presented at the International AIDS Conference 2020.
 

Early Study Termination

Half of the 4566 study participants — from 43 sites in Africa, Asia, Latin America, and the United States — were younger than 30 years, 12.4% were transgender women, 29.7% were black, and 46.1% were Hispanic.

By design, ViiV Healthcare, the study sponsor, required that 50% of American participants be black to reflect the population at risk for HIV in the United States, said Raphael Landovitz, MD, from the UCLA David Geffen School of Medicine in Los Angeles, who is protocol chair for HPTN 083. In fact, 49.7% of the American cohort was black and 17.8% was Hispanic.

Patients randomized to the cabotegravir group received daily oral cabotegravir plus daily oral placebo for 5 weeks, to assess safety, followed by a cabotegravir injection at weeks 5 and 9 and every 2 months thereafter out to week 153 plus daily oral placebo. Patients randomized to the Truvada group received daily oral Truvada plus daily oral placebo for 5 weeks, followed by daily oral Truvada plus placebo injection, on the same schedule, out to week 153.

After the final injection, all participants continued on daily oral Truvada for 48 weeks.

The researchers expected to wait until 172 participants acquired HIV; they decided at the outset that this number would be sufficient to power a decision on whether or not cabotegravir injections are better than daily oral Truvada. But by May 2020, when 52 of the study participants had acquired HIV, the results were so lopsided in favor of cabotegravir that the trial was stopped. At that point, all participants were offered cabotegravir injections every 2 months.

Thirty-nine of the 52 (75%) new HIV infections occurred in the Truvada group. In fact, people in the cabotegravir group were less likely to acquire HIV than those in the Truvada group (hazard ratio, 0.34).

“This definitively establishes the superiority of cabotegravir,” said Landovitz.

He and his colleagues had been legitimately concerned that HIV acquisition would be so low in the trial that they wouldn’t be able to show how effective the injectable was. The success of Truvada PrEP has made it difficult to design prevention trials.

“We know that Truvada works extremely well, so the fact that we were able to show that cabotegravir in this population works better” is a powerful observation, said Landovitz. This is especially true because the rates of sexually transmitted infections — which are thought to increase risk for HIV transmission — were so high. Overall, 16.5% of the participants tested positive for syphilis during the trial, 13.3% tested positive for gonorrhea, and 21.1% tested positive for Chlamydia.
 

Five Surprising Seroconversions

Eleven of the 15 HIV infections in the cabotegravir group occurred in people who had received at least one injection. Three of these infections actually occurred during the first 5 weeks of the study when participants were taking oral cabotegravir, two occurred when participants chose to discontinue the injection and return to daily oral Truvada, and one occurred after a participant missed the injection for a prolonged period of time.

But five of the transmissions occurred in participants who appeared to be perfectly adherent.

Landovitz offered a number of possible reasons for this surprising finding.

“Number one could be that there’s something about these five particular individuals such that they grind up and eliminate the cabotegravir faster than other people, so an 8-week interval is too long for them,” he explained. “Another possibility, although pretty rare, is that there is a rare circulating virus that is intrinsically resistant to cabotegravir.”

Breakthrough HIV transmissions have been rare in people taking oral PrEP.

Disruptions caused by the COVID-19 pandemic have meant that the researchers don’t yet have the data on drug-resistant mutations or drug levels for these five participants, but they will.

“I suspect the truth is that there will never be a 100% failsafe HIV prevention mechanism,” said Landovitz.
 

“Impressive” Findings

The findings were greeted with excitement, although questions remain.

They are “impressive,” especially the data on black and Hispanic participants, said Paul Sax, MD, medical director of the Division of Infectious Diseases at Brigham and Women’s Hospital in Boston.

However, he said he is interested in the data showing that although participants in both groups gained weight during the study, there was early weight loss in the Truvada group, meaning that those in the cabotegravir group weighed more at the end of the study than those in the Truvada group.

“I’ve been watching the data on weight with integrase inhibitors,” he explained, including weight data specific to Truvada and to the combination of emtricitabine and tenofovir alafenamide (Descovy, Gilead). It looks like Truvada “has some sort of weight-suppressive effects. That’s going to be a thing we’re going to have to watch.”

Coleman said she is already thinking about patients at Whitman-Walker who might do well on cabotegravir and those who can start PrEP for the first time with this option.

“Not only would people probably switch to this option, but maybe people would be interested in starting a biomedical prevention approach that isn’t a pill every day,” she said. “It’s just exciting to have another option. Hopefully, in a few years, we’ll have implantable devices and rings; I can’t even imagine what all those brilliant minds are coming up with.”

But that’s still a ways off. First, cabotegravir has yet to be approved for HIV prevention, and ideally, eventually, there will be a way to determine if cabotegravir is safe for each patient that doesn’t involve a month of daily pills.

“We need to solve that problem because it’s so complicated to do an oral lead-in for a month or so,” said Carl Dieffenbach, PhD, director of the Division of AIDS at the National Institute of Allergy and Infectious Diseases, National Institutes of Health. “Otherwise it’s not going to be feasible.”

We need to make sure this gets licensed for men and women and transgender individuals.

Even with these positive data, Dieffenbach and other officials are not keen to have ViiV apply for licensing right away. Last October, Descovy was the second oral PrEP pill approved for HIV prevention, but only for use by gay men and transgender women — it hadn’t been well studied in cisgender women — causing an outcry. Now, officials are suggesting that ViiV not make the same mistake.

They are urging the company to hold off until data from the sister study of the medication in women — HPTN 084 — is completed in 2022.

“We need to make sure this gets licensed for men and women and transgender individuals,” Dieffenbach told Medscape Medical News. “We just need to give this a little more time and then build a plan with contingencies, so that if something happens, we still have collected all the safety data in women so we can say it’s safe.”
 

ViiV seems to be making such a plan.

“Our goal is to seek approval across all genders and we will work with the FDA and other regulatory agencies to map out a plan to achieve this goal,” said Kimberly Smith, MD, head of research and development at ViiV Healthcare.

The World Health Organization (WHO), meanwhile, doesn’t expect to change its guidelines on HIV prevention medications until data from HPTN 084 are reported.

“What’s important when we look at guidelines is that we also look across populations,” said Meg Doherty, coordinator of treatment and care in the Department of HIV/AIDS at WHO. “We’re waiting to know more about how cabotegravir works in women, because we certainly want to have prevention drugs that can be used in men and women at different age ranges and, ideally, during pregnancy.”

International AIDS Conference 2020: Abstracts OAXLB01. Presented July 8, 2020.
 

This article first appeared on Medscape.com.

Injections of cabotegravir (ViiV Healthcare) given every other month are more effective in blocking HIV transmission than is the once-a-day combination of tenofovir disoproxil fumarate and emtricitabine (Truvada, Gilead Science), new data from the HPTN 083 trial show.

The findings “could transform the HIV prevention landscape for so many people,” said Megan Coleman, DNP, from Whitman-Walker Health in Washington, DC, who regularly prescribes Truvada as pre-exposure prophylaxis (PrEP).

At Whitman-Walker alone, about 3000 people were taking the pill in early 2020, but “for some people, taking a pill every day just isn’t a viable option,” said Coleman. “To have something that can support a patient’s choice and a patient’s ability to reduce their own risk of HIV is amazing.”

Final results from the trial — which looked at the drug in cisgender men and transgender women who have sex with men — were presented at the International AIDS Conference 2020.
 

Early Study Termination

Half of the 4566 study participants — from 43 sites in Africa, Asia, Latin America, and the United States — were younger than 30 years, 12.4% were transgender women, 29.7% were black, and 46.1% were Hispanic.

By design, ViiV Healthcare, the study sponsor, required that 50% of American participants be black to reflect the population at risk for HIV in the United States, said Raphael Landovitz, MD, from the UCLA David Geffen School of Medicine in Los Angeles, who is protocol chair for HPTN 083. In fact, 49.7% of the American cohort was black and 17.8% was Hispanic.

Patients randomized to the cabotegravir group received daily oral cabotegravir plus daily oral placebo for 5 weeks, to assess safety, followed by a cabotegravir injection at weeks 5 and 9 and every 2 months thereafter out to week 153 plus daily oral placebo. Patients randomized to the Truvada group received daily oral Truvada plus daily oral placebo for 5 weeks, followed by daily oral Truvada plus placebo injection, on the same schedule, out to week 153.

After the final injection, all participants continued on daily oral Truvada for 48 weeks.

The researchers expected to wait until 172 participants acquired HIV; they decided at the outset that this number would be sufficient to power a decision on whether or not cabotegravir injections are better than daily oral Truvada. But by May 2020, when 52 of the study participants had acquired HIV, the results were so lopsided in favor of cabotegravir that the trial was stopped. At that point, all participants were offered cabotegravir injections every 2 months.

Thirty-nine of the 52 (75%) new HIV infections occurred in the Truvada group. In fact, people in the cabotegravir group were less likely to acquire HIV than those in the Truvada group (hazard ratio, 0.34).

“This definitively establishes the superiority of cabotegravir,” said Landovitz.

He and his colleagues had been legitimately concerned that HIV acquisition would be so low in the trial that they wouldn’t be able to show how effective the injectable was. The success of Truvada PrEP has made it difficult to design prevention trials.

“We know that Truvada works extremely well, so the fact that we were able to show that cabotegravir in this population works better” is a powerful observation, said Landovitz. This is especially true because the rates of sexually transmitted infections — which are thought to increase risk for HIV transmission — were so high. Overall, 16.5% of the participants tested positive for syphilis during the trial, 13.3% tested positive for gonorrhea, and 21.1% tested positive for Chlamydia.
 

Five Surprising Seroconversions

Eleven of the 15 HIV infections in the cabotegravir group occurred in people who had received at least one injection. Three of these infections actually occurred during the first 5 weeks of the study when participants were taking oral cabotegravir, two occurred when participants chose to discontinue the injection and return to daily oral Truvada, and one occurred after a participant missed the injection for a prolonged period of time.

But five of the transmissions occurred in participants who appeared to be perfectly adherent.

Landovitz offered a number of possible reasons for this surprising finding.

“Number one could be that there’s something about these five particular individuals such that they grind up and eliminate the cabotegravir faster than other people, so an 8-week interval is too long for them,” he explained. “Another possibility, although pretty rare, is that there is a rare circulating virus that is intrinsically resistant to cabotegravir.”

Breakthrough HIV transmissions have been rare in people taking oral PrEP.

Disruptions caused by the COVID-19 pandemic have meant that the researchers don’t yet have the data on drug-resistant mutations or drug levels for these five participants, but they will.

“I suspect the truth is that there will never be a 100% failsafe HIV prevention mechanism,” said Landovitz.
 

“Impressive” Findings

The findings were greeted with excitement, although questions remain.

They are “impressive,” especially the data on black and Hispanic participants, said Paul Sax, MD, medical director of the Division of Infectious Diseases at Brigham and Women’s Hospital in Boston.

However, he said he is interested in the data showing that although participants in both groups gained weight during the study, there was early weight loss in the Truvada group, meaning that those in the cabotegravir group weighed more at the end of the study than those in the Truvada group.

“I’ve been watching the data on weight with integrase inhibitors,” he explained, including weight data specific to Truvada and to the combination of emtricitabine and tenofovir alafenamide (Descovy, Gilead). It looks like Truvada “has some sort of weight-suppressive effects. That’s going to be a thing we’re going to have to watch.”

Coleman said she is already thinking about patients at Whitman-Walker who might do well on cabotegravir and those who can start PrEP for the first time with this option.

“Not only would people probably switch to this option, but maybe people would be interested in starting a biomedical prevention approach that isn’t a pill every day,” she said. “It’s just exciting to have another option. Hopefully, in a few years, we’ll have implantable devices and rings; I can’t even imagine what all those brilliant minds are coming up with.”

But that’s still a ways off. First, cabotegravir has yet to be approved for HIV prevention, and ideally, eventually, there will be a way to determine if cabotegravir is safe for each patient that doesn’t involve a month of daily pills.

“We need to solve that problem because it’s so complicated to do an oral lead-in for a month or so,” said Carl Dieffenbach, PhD, director of the Division of AIDS at the National Institute of Allergy and Infectious Diseases, National Institutes of Health. “Otherwise it’s not going to be feasible.”

We need to make sure this gets licensed for men and women and transgender individuals.

Even with these positive data, Dieffenbach and other officials are not keen to have ViiV apply for licensing right away. Last October, Descovy was the second oral PrEP pill approved for HIV prevention, but only for use by gay men and transgender women — it hadn’t been well studied in cisgender women — causing an outcry. Now, officials are suggesting that ViiV not make the same mistake.

They are urging the company to hold off until data from the sister study of the medication in women — HPTN 084 — is completed in 2022.

“We need to make sure this gets licensed for men and women and transgender individuals,” Dieffenbach told Medscape Medical News. “We just need to give this a little more time and then build a plan with contingencies, so that if something happens, we still have collected all the safety data in women so we can say it’s safe.”
 

ViiV seems to be making such a plan.

“Our goal is to seek approval across all genders and we will work with the FDA and other regulatory agencies to map out a plan to achieve this goal,” said Kimberly Smith, MD, head of research and development at ViiV Healthcare.

The World Health Organization (WHO), meanwhile, doesn’t expect to change its guidelines on HIV prevention medications until data from HPTN 084 are reported.

“What’s important when we look at guidelines is that we also look across populations,” said Meg Doherty, coordinator of treatment and care in the Department of HIV/AIDS at WHO. “We’re waiting to know more about how cabotegravir works in women, because we certainly want to have prevention drugs that can be used in men and women at different age ranges and, ideally, during pregnancy.”

International AIDS Conference 2020: Abstracts OAXLB01. Presented July 8, 2020.
 

This article first appeared on Medscape.com.

Children appear less likely than adults to be the first cases of COVID-19 within a household, based on data from families of 39 children younger than 16 years.

Courtesy NIAID

“Unlike with other viral respiratory infections, children do not seem to be a major vector of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission, with most pediatric cases described inside familial clusters and no documentation of child-to-child or child-to-adult transmission,” said Klara M. Posfay-Barbe, MD, of the University of Geneva, Switzerland, and colleagues.

In a study published in Pediatrics, the researchers analyzed data from all COVID-19 patients younger than 16 years who were identified between March 10, 2020, and April 10, 2020, through a hospital surveillance network. Parents and household contacts were called for contact tracing.

In 31 of 39 (79%) households, at least one adult family member had a suspected or confirmed SARS-CoV-2 infection before onset of symptoms in the child. These findings support data from previous studies suggesting that children mainly become infected from adult family members rather than transmitting the virus to them, the researchers said

In only 3 of 39 (8%) households was the study child the first to develop symptoms. “Surprisingly, in 33% of households, symptomatic HHCs [household contacts] tested negative despite belonging to a familial cluster with confirmed SARS-CoV-2 cases, suggesting an underreporting of cases,” Dr. Posfay-Barbe and associates noted.

The findings were limited by several factors including potential underreporting of cases because those with mild or atypical presentations may not have sought medical care, and the inability to confirm child-to-adult transmission. The results were strengthened by the extensive contact tracing and very few individuals lost to follow-up, they said; however, more diagnostic screening and contact tracing are needed to improve understanding of household transmission of SARS-CoV-2, they concluded.

Resolving the issue of how much children contribute to transmission of SARS-CoV-2 is essential to making informed decisions about public health, including how to structure schools and child-care facility reopening, Benjamin Lee, MD, and William V. Raszka Jr., MD, both of the University of Vermont, Burlington, said in an accompanying editorial (Pediatrics. 2020 Jul 10. doi: 10.1542/peds/2020-004879).

The data in the current study support other studies of transmission among household contacts in China suggesting that, in most cases of childhood infections, “the child was not the source of infection and that children most frequently acquire COVID-19 from adults, rather than transmitting it to them,” they wrote.

In addition, the limited data on transmission of SARS-CoV-2 by children outside of the household show few cases of secondary infection from children identified with SARS-CoV-2 in school settings in studies from France and Australia, Dr. Lee and Dr. Raszka noted.

“On the basis of these data, SARS-CoV2 transmission in schools may be less important in community transmission than initially feared,” the editorialists wrote. “This would be another manner by which SARS-CoV2 differs drastically from influenza, for which school-based transmission is well recognized as a significant driver of epidemic disease and forms the basis for most evidence regarding school closures as public health strategy.”

“Therefore, serious consideration should be paid toward strategies that allow schools to remain open, even during periods of COVID-19 spread,” the editorialists concluded. “In doing so, we could minimize the potentially profound adverse social, developmental, and health costs that our children will continue to suffer until an effective treatment or vaccine can be developed and distributed or, failing that, until we reach herd immunity,” Dr. Lee and Dr. Raszka emphasized.

The study received no outside funding. The researchers and editorialists had no financial conflicts to disclose.

SOURCE: Posfay-Barbe KM et al. Pediatrics. 2020 Jul 10. doi: 10.1542/peds.2020-1576.

Children appear less likely than adults to be the first cases of COVID-19 within a household, based on data from families of 39 children younger than 16 years.

Courtesy NIAID

“Unlike with other viral respiratory infections, children do not seem to be a major vector of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission, with most pediatric cases described inside familial clusters and no documentation of child-to-child or child-to-adult transmission,” said Klara M. Posfay-Barbe, MD, of the University of Geneva, Switzerland, and colleagues.

In a study published in Pediatrics, the researchers analyzed data from all COVID-19 patients younger than 16 years who were identified between March 10, 2020, and April 10, 2020, through a hospital surveillance network. Parents and household contacts were called for contact tracing.

In 31 of 39 (79%) households, at least one adult family member had a suspected or confirmed SARS-CoV-2 infection before onset of symptoms in the child. These findings support data from previous studies suggesting that children mainly become infected from adult family members rather than transmitting the virus to them, the researchers said

In only 3 of 39 (8%) households was the study child the first to develop symptoms. “Surprisingly, in 33% of households, symptomatic HHCs [household contacts] tested negative despite belonging to a familial cluster with confirmed SARS-CoV-2 cases, suggesting an underreporting of cases,” Dr. Posfay-Barbe and associates noted.

The findings were limited by several factors including potential underreporting of cases because those with mild or atypical presentations may not have sought medical care, and the inability to confirm child-to-adult transmission. The results were strengthened by the extensive contact tracing and very few individuals lost to follow-up, they said; however, more diagnostic screening and contact tracing are needed to improve understanding of household transmission of SARS-CoV-2, they concluded.

Resolving the issue of how much children contribute to transmission of SARS-CoV-2 is essential to making informed decisions about public health, including how to structure schools and child-care facility reopening, Benjamin Lee, MD, and William V. Raszka Jr., MD, both of the University of Vermont, Burlington, said in an accompanying editorial (Pediatrics. 2020 Jul 10. doi: 10.1542/peds/2020-004879).

The data in the current study support other studies of transmission among household contacts in China suggesting that, in most cases of childhood infections, “the child was not the source of infection and that children most frequently acquire COVID-19 from adults, rather than transmitting it to them,” they wrote.

In addition, the limited data on transmission of SARS-CoV-2 by children outside of the household show few cases of secondary infection from children identified with SARS-CoV-2 in school settings in studies from France and Australia, Dr. Lee and Dr. Raszka noted.

“On the basis of these data, SARS-CoV2 transmission in schools may be less important in community transmission than initially feared,” the editorialists wrote. “This would be another manner by which SARS-CoV2 differs drastically from influenza, for which school-based transmission is well recognized as a significant driver of epidemic disease and forms the basis for most evidence regarding school closures as public health strategy.”

“Therefore, serious consideration should be paid toward strategies that allow schools to remain open, even during periods of COVID-19 spread,” the editorialists concluded. “In doing so, we could minimize the potentially profound adverse social, developmental, and health costs that our children will continue to suffer until an effective treatment or vaccine can be developed and distributed or, failing that, until we reach herd immunity,” Dr. Lee and Dr. Raszka emphasized.

The study received no outside funding. The researchers and editorialists had no financial conflicts to disclose.

SOURCE: Posfay-Barbe KM et al. Pediatrics. 2020 Jul 10. doi: 10.1542/peds.2020-1576.

Children appear less likely than adults to be the first cases of COVID-19 within a household, based on data from families of 39 children younger than 16 years.

Courtesy NIAID

“Unlike with other viral respiratory infections, children do not seem to be a major vector of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission, with most pediatric cases described inside familial clusters and no documentation of child-to-child or child-to-adult transmission,” said Klara M. Posfay-Barbe, MD, of the University of Geneva, Switzerland, and colleagues.

In a study published in Pediatrics, the researchers analyzed data from all COVID-19 patients younger than 16 years who were identified between March 10, 2020, and April 10, 2020, through a hospital surveillance network. Parents and household contacts were called for contact tracing.

In 31 of 39 (79%) households, at least one adult family member had a suspected or confirmed SARS-CoV-2 infection before onset of symptoms in the child. These findings support data from previous studies suggesting that children mainly become infected from adult family members rather than transmitting the virus to them, the researchers said

In only 3 of 39 (8%) households was the study child the first to develop symptoms. “Surprisingly, in 33% of households, symptomatic HHCs [household contacts] tested negative despite belonging to a familial cluster with confirmed SARS-CoV-2 cases, suggesting an underreporting of cases,” Dr. Posfay-Barbe and associates noted.

The findings were limited by several factors including potential underreporting of cases because those with mild or atypical presentations may not have sought medical care, and the inability to confirm child-to-adult transmission. The results were strengthened by the extensive contact tracing and very few individuals lost to follow-up, they said; however, more diagnostic screening and contact tracing are needed to improve understanding of household transmission of SARS-CoV-2, they concluded.

Resolving the issue of how much children contribute to transmission of SARS-CoV-2 is essential to making informed decisions about public health, including how to structure schools and child-care facility reopening, Benjamin Lee, MD, and William V. Raszka Jr., MD, both of the University of Vermont, Burlington, said in an accompanying editorial (Pediatrics. 2020 Jul 10. doi: 10.1542/peds/2020-004879).

The data in the current study support other studies of transmission among household contacts in China suggesting that, in most cases of childhood infections, “the child was not the source of infection and that children most frequently acquire COVID-19 from adults, rather than transmitting it to them,” they wrote.

In addition, the limited data on transmission of SARS-CoV-2 by children outside of the household show few cases of secondary infection from children identified with SARS-CoV-2 in school settings in studies from France and Australia, Dr. Lee and Dr. Raszka noted.

“On the basis of these data, SARS-CoV2 transmission in schools may be less important in community transmission than initially feared,” the editorialists wrote. “This would be another manner by which SARS-CoV2 differs drastically from influenza, for which school-based transmission is well recognized as a significant driver of epidemic disease and forms the basis for most evidence regarding school closures as public health strategy.”

“Therefore, serious consideration should be paid toward strategies that allow schools to remain open, even during periods of COVID-19 spread,” the editorialists concluded. “In doing so, we could minimize the potentially profound adverse social, developmental, and health costs that our children will continue to suffer until an effective treatment or vaccine can be developed and distributed or, failing that, until we reach herd immunity,” Dr. Lee and Dr. Raszka emphasized.

The study received no outside funding. The researchers and editorialists had no financial conflicts to disclose.

SOURCE: Posfay-Barbe KM et al. Pediatrics. 2020 Jul 10. doi: 10.1542/peds.2020-1576.

Hypercalcemia is found when the corrected serum calcium level is > 10.5 mg/dL.¹ Its symptoms are not specific and may include polyuria, dehydration, polydipsia, anorexia, nausea and/or vomiting, constipation, and other central nervous system manifestations, including confusion, delirium, cognitive impairment, muscle weakness, psychotic symptoms, and even coma.^1,2

Hypercalcemia has varied etiologies; however, malignancy-induced hypercalcemia is one of the most common causes. In the US, the most common causes of malignancy-induced hypercalcemia are primary tumors of the lung or breast, multiple myeloma (MM), squamous cell carcinoma of the head or neck, renal cancer, and ovarian cancer.¹

Men with prostate cancer and bone metastasis have relatively worse prognosis than do patient with no metastasis.³ In a recent meta-analysis of patients with bone-involved castration-resistant prostate cancer, the median survival was 21 months.³

Hypercalcemia is a rare manifestation of prostate cancer. In a retrospective study conducted between 2009 and 2013 using the Oncology Services Comprehensive Electronic Records (OSCER) warehouse of electronic health records (EHR), the rates of malignancy-induced hypercalcemia were the lowest among patients with prostate cancer, ranging from 1.4 to 2.1%.¹

We present this case to discuss different pathophysiologic mechanisms leading to hypercalcemia in a patient with prostate cancer with bone metastasis and to study the role of humoral and growth factors in the pathogenesis of the disease.

Case Presentation

An African American man aged 69 years presented to the emergency department (ED) with generalized weakness, fatigue, and lower extremities muscle weakness. He reported a 40-lb weight loss over the past 3 months, intermittent lower back pain, and a 50 pack-year smoking history. A physical examination suggested clinical signs of dehydration.

Laboratory test results indicated hypercalcemia, macrocytic anemia, and thrombocytopenia: calcium 15.8 mg/dL, serum albumin 4.1 mg/dL, alkaline phosphatase 139 μ/L, blood urea nitrogen 55 mg/dL, creatinine 3.4 mg/dL (baseline 1.4-1.5 mg/dL), hemoglobin 8 g/dL, mean corpuscular volume 99.6 fL, and platelets 100,000/μL. The patient was admitted for hypercalcemia. His intact parathyroid hormone (iPTH) was suppressed at 16 pg/mL, phosphorous was 3.8 mg/dL, parathyroid hormone-related peptide (PTHrP) was < 0.74 pmol/L, vitamin D (25 hydroxy cholecalciferol) was mildly decreased at 17.2 ng/mL, and 1,25 dihydroxy cholecalciferol (calcitriol) was < 5.0 (normal range 20-79.3 pg/mL).

A computed tomography (CT) scan of the chest and abdomen was taken due to the patient’s heavy smoking history, an incidentally detected right lung base nodule on chest X-ray, and hypercalcemia. The CT scan showed multiple right middle lobe lung nodules with and without calcifications and calcified right hilar lymph nodes (Figure 1).

To evaluate the pancytopenia, a bone marrow biopsy was done, which showed that 80 to 90% of the marrow space was replaced by fibrosis and metastatic malignancy. Trilinear hematopoiesis was not seen (Figure 2). The tumor cells were positive for prostate- specific membrane antigen (PSMA) and negative for cytokeratin 7 and 20 (CK7 and CK20).⁴ The former is a membrane protein expressed on prostate tissues, including cancer; the latter is a form of protein used to identify adenocarcinoma of unknown primary origin (CK7 usually found in primary/ metastatic lung adenocarcinoma and CK20 usually in primary and some metastatic diseases of colon adenocarcinoma).⁵ A prostatic specific antigen (PSA) test was markedly elevated: 335.94 ng/mL (1.46 ng/mL on a previous 2011 test).

Metastatic adenocarcinoma of the prostate was diagnosed without a prostate biopsy. To determine the extent of bone metastases, a technetium-99m-methylene diphosphonate (MDP) bone scintigraphy demonstrated a superscan with intense foci of increased radiotracer uptake involving the bilateral shoulders, sternoclavicular joints, and sternum with heterogeneous uptake involving bilateral anterior and posterior ribs; cervical, thoracic, and lumbar spines; sacrum, pelvis, and bilateral hips, including the femoral head/neck and intertrochanteric regions. Also noted were several foci of radiotracer uptake involving the mandible and bilateral skull in the region of the temporomandibular joints (Figure 3).

The patient was initially treated with IV isotonic saline, followed by calcitonin and then pamidronate after kidney function improved. His calcium level responded to the therapy, and a plan was made by medical oncology to start androgen deprivation therapy (ADT) prior to discharge.

He was initially treated with bicalutamide, while a luteinizing hormone-releasing hormone agonist (leuprolide) was added 1 week later. Bicalutamide was then discontinued and a combined androgen blockade consisting of leuprolide, ketoconazole, and hydrocortisone was started. This therapy resulted in remission, and PSA declined to 1.73 ng/ mL 3 months later. At that time the patient enrolled in a clinical trial with leuprolide and bicalutamide combined therapy. About 6 months after his diagnosis, patient’s cancer progressed and became hormone refractory disease. At that time, bicalutamide was discontinued, and his therapy was switched to combined leuprolide and enzalutamide. After 6 months of therapy with enzalutamide, the patient’s cancer progressed again. He was later treated with docetaxel chemotherapy but died 16 months after diagnosis.

showed improvement of hypercalcemia at the time of discharge, but 9 months later and toward the time of expiration, our patient developed secondary hyperparathyroidism, with calcium maintained in the normal range, while iPTH was significantly elevated, a finding likely explained by a decline in kidney function and a fall in glomerular filtration rate (Table).

Discussion

Hypercalcemia in the setting of prostate cancer is a rare complication with an uncertain pathophysiology.6 Several mechanisms have been proposed for hypercalcemia of malignancy, these comprise humoral hypercalcemia of malignancy mediated by increased PTHrP; local osteolytic hypercalcemia with secretion of other humoral factors; excess extrarenal activation of vitamin D (1,25[OH]2D); PTH secretion, ectopic or primary; and multiple concurrent etiologies.⁷

PTHrP is the predominant mediator for hypercalcemia of malignancy and is estimated to account for 80% of hypercalcemia in patients with cancer. This protein shares a substantial sequence homology with PTH; in fact, 8 of the first 13 amino acids at the N-terminal portion of PTH were identical.⁸ PTHrP has multiple isoforms (PTHrP 141, PTHrP 139, and PTHrP 173). Like PTH, it enhances renal tubular reabsorption of calcium while increasing urinary phosphorus excretion.⁷ The result is both hypercalcemia and hypophosphatemia. However, unlike PTH, PTHrP does not increase 1,25(OH)2D and thus does not increase intestinal absorption of calcium and phosphorus. PTHrP acts on osteoblasts, leading to enhanced synthesis of receptor activator of nuclear factor-κB ligand (RANKL).⁷

In one study, PTHrP was detected immunohistochemically in prostate cancer cells. Iwamura and colleagues used 33 radical prostatectomy specimens from patients with clinically localized carcinoma of the prostate.⁹ None of these patients demonstrated hypercalcemia prior to the surgery. Using a mouse monoclonal antibody to an amino acid fragment, all cases demonstrated some degree of immunoreactivity throughout the cytoplasm of the tumor cells, but immunostaining was absent from inflammatory and stromal cells.⁹Furthermore, the intensity of the staining appeared to directly correlate with increasing tumor grade.⁹

Another study by Iwamura and colleagues suggested that PTHrP may play a significant role in the growth of prostate cancer by acting locally in an autocrine fashion.¹⁰ In this study, all prostate cancer cell lines from different sources expressed PTHrP immunoreactivity as well as evidence of DNA synthesis, the latter being measured by thymidine incorporation assay. Moreover, when these cells were incubated with various concentrations of mouse monoclonal antibody directed to PTHrP fragment, PTHrP-induced DNA synthesis was inhibited in a dose-dependent manner and almost completely neutralized at a specific concentration. Interestingly, the study demonstrated that cancer cell line derived from bone metastatic lesions secreted significantly greater amounts of PTHrP than did the cell line derived from the metastasis in the brain or in the lymph node. These findings suggest that PTHrP production may confer some advantage on the ability of prostate cancer cells to grow in bone.¹⁰

Ando and colleagues reported that neuroendocrine dedifferentiated prostate cancer can develop as a result of long-term ADT even after several years of therapy and has the potential to worsen and develop severe hypercalcemia.⁸ Neuron-specific enolase was used as the specific marker for the neuroendocrine cell, which suggested that the prostate cancer cell derived from the neuroendocrine cell might synthesize PTHrP and be responsible for the observed hypercalcemia.⁸

Other mechanisms cited for hypercalcemia of malignancy include other humoral factors associated with increased remodeling and comprise interleukin 1, 3, 6 (IL-1, IL-3, IL-6); tumor necrosis factor α; transforming growth factor A and B observed in metastatic bone lesions in breast cancer; lymphotoxin; E series prostaglandins; and macrophage inflammatory protein 1α seen in MM.

Local osteolytic hypercalcemia accounts for about 20% of cases and is usually associated with extensive bone metastases. It is most commonly seen in MM and metastatic breast cancer and less commonly in leukemia. The proposed mechanism is thought to be because of the release of local cytokines from the tumor, resulting in excess osteoclast activation and enhanced bone resorption often through RANK/RANKL interaction.

Extrarenal production of 1,25(OH)2D by the tumor accounts for about 1% of cases of hypercalcemia in malignancy. 1,25(OH)2D causes increased intestinal absorption of calcium and enhances osteolytic bone resorption, resulting in increased serum calcium. This mechanism is most commonly seen with Hodgkin and non-Hodgkin lymphoma and had been reported in ovarian dysgerminoma.⁷

In our patient, bone imaging showed osteoblastic lesions, a finding that likely contrasts the local osteolytic bone destruction theory. PTHrP was not significantly elevated in the serum, and PTH levels ruled out any form of primary hyperparathyroidism. In addition, histopathology showed no evidence of mosaicism or neuroendocrine dedifferentiation.

Findings in aggregate tell us that an exact pathophysiologic mechanism leading to hypercalcemia in prostate cancer is still unclear and may involve an interplay between growth factors and possible osteolytic materials, yet it must be studied thoroughly.

Conclusions

Hypercalcemia in pure metastatic adenocarcinoma of prostate is a rare finding and is of uncertain significance. Some studies suggested a search for unusual histopathologies, including neuroendocrine cancer and neuroendocrine dedifferentiation.^8,11 However, in adenocarcinoma alone, it has an uncertain pathophysiology that needs to be further studied. Studies needed to investigate the role of PTHrP as a growth factor for both prostate cancer cells and development of hypercalcemia and possibly target-directed monoclonal antibody therapies may need to be extensively researched.

Hypercalcemia is found when the corrected serum calcium level is > 10.5 mg/dL.¹ Its symptoms are not specific and may include polyuria, dehydration, polydipsia, anorexia, nausea and/or vomiting, constipation, and other central nervous system manifestations, including confusion, delirium, cognitive impairment, muscle weakness, psychotic symptoms, and even coma.^1,2

Hypercalcemia has varied etiologies; however, malignancy-induced hypercalcemia is one of the most common causes. In the US, the most common causes of malignancy-induced hypercalcemia are primary tumors of the lung or breast, multiple myeloma (MM), squamous cell carcinoma of the head or neck, renal cancer, and ovarian cancer.¹

Men with prostate cancer and bone metastasis have relatively worse prognosis than do patient with no metastasis.³ In a recent meta-analysis of patients with bone-involved castration-resistant prostate cancer, the median survival was 21 months.³

Hypercalcemia is a rare manifestation of prostate cancer. In a retrospective study conducted between 2009 and 2013 using the Oncology Services Comprehensive Electronic Records (OSCER) warehouse of electronic health records (EHR), the rates of malignancy-induced hypercalcemia were the lowest among patients with prostate cancer, ranging from 1.4 to 2.1%.¹

We present this case to discuss different pathophysiologic mechanisms leading to hypercalcemia in a patient with prostate cancer with bone metastasis and to study the role of humoral and growth factors in the pathogenesis of the disease.

Case Presentation

An African American man aged 69 years presented to the emergency department (ED) with generalized weakness, fatigue, and lower extremities muscle weakness. He reported a 40-lb weight loss over the past 3 months, intermittent lower back pain, and a 50 pack-year smoking history. A physical examination suggested clinical signs of dehydration.

Laboratory test results indicated hypercalcemia, macrocytic anemia, and thrombocytopenia: calcium 15.8 mg/dL, serum albumin 4.1 mg/dL, alkaline phosphatase 139 μ/L, blood urea nitrogen 55 mg/dL, creatinine 3.4 mg/dL (baseline 1.4-1.5 mg/dL), hemoglobin 8 g/dL, mean corpuscular volume 99.6 fL, and platelets 100,000/μL. The patient was admitted for hypercalcemia. His intact parathyroid hormone (iPTH) was suppressed at 16 pg/mL, phosphorous was 3.8 mg/dL, parathyroid hormone-related peptide (PTHrP) was < 0.74 pmol/L, vitamin D (25 hydroxy cholecalciferol) was mildly decreased at 17.2 ng/mL, and 1,25 dihydroxy cholecalciferol (calcitriol) was < 5.0 (normal range 20-79.3 pg/mL).

A computed tomography (CT) scan of the chest and abdomen was taken due to the patient’s heavy smoking history, an incidentally detected right lung base nodule on chest X-ray, and hypercalcemia. The CT scan showed multiple right middle lobe lung nodules with and without calcifications and calcified right hilar lymph nodes (Figure 1).

To evaluate the pancytopenia, a bone marrow biopsy was done, which showed that 80 to 90% of the marrow space was replaced by fibrosis and metastatic malignancy. Trilinear hematopoiesis was not seen (Figure 2). The tumor cells were positive for prostate- specific membrane antigen (PSMA) and negative for cytokeratin 7 and 20 (CK7 and CK20).⁴ The former is a membrane protein expressed on prostate tissues, including cancer; the latter is a form of protein used to identify adenocarcinoma of unknown primary origin (CK7 usually found in primary/ metastatic lung adenocarcinoma and CK20 usually in primary and some metastatic diseases of colon adenocarcinoma).⁵ A prostatic specific antigen (PSA) test was markedly elevated: 335.94 ng/mL (1.46 ng/mL on a previous 2011 test).

Metastatic adenocarcinoma of the prostate was diagnosed without a prostate biopsy. To determine the extent of bone metastases, a technetium-99m-methylene diphosphonate (MDP) bone scintigraphy demonstrated a superscan with intense foci of increased radiotracer uptake involving the bilateral shoulders, sternoclavicular joints, and sternum with heterogeneous uptake involving bilateral anterior and posterior ribs; cervical, thoracic, and lumbar spines; sacrum, pelvis, and bilateral hips, including the femoral head/neck and intertrochanteric regions. Also noted were several foci of radiotracer uptake involving the mandible and bilateral skull in the region of the temporomandibular joints (Figure 3).

The patient was initially treated with IV isotonic saline, followed by calcitonin and then pamidronate after kidney function improved. His calcium level responded to the therapy, and a plan was made by medical oncology to start androgen deprivation therapy (ADT) prior to discharge.

He was initially treated with bicalutamide, while a luteinizing hormone-releasing hormone agonist (leuprolide) was added 1 week later. Bicalutamide was then discontinued and a combined androgen blockade consisting of leuprolide, ketoconazole, and hydrocortisone was started. This therapy resulted in remission, and PSA declined to 1.73 ng/ mL 3 months later. At that time the patient enrolled in a clinical trial with leuprolide and bicalutamide combined therapy. About 6 months after his diagnosis, patient’s cancer progressed and became hormone refractory disease. At that time, bicalutamide was discontinued, and his therapy was switched to combined leuprolide and enzalutamide. After 6 months of therapy with enzalutamide, the patient’s cancer progressed again. He was later treated with docetaxel chemotherapy but died 16 months after diagnosis.

showed improvement of hypercalcemia at the time of discharge, but 9 months later and toward the time of expiration, our patient developed secondary hyperparathyroidism, with calcium maintained in the normal range, while iPTH was significantly elevated, a finding likely explained by a decline in kidney function and a fall in glomerular filtration rate (Table).

Discussion

Hypercalcemia in the setting of prostate cancer is a rare complication with an uncertain pathophysiology.6 Several mechanisms have been proposed for hypercalcemia of malignancy, these comprise humoral hypercalcemia of malignancy mediated by increased PTHrP; local osteolytic hypercalcemia with secretion of other humoral factors; excess extrarenal activation of vitamin D (1,25[OH]2D); PTH secretion, ectopic or primary; and multiple concurrent etiologies.⁷

PTHrP is the predominant mediator for hypercalcemia of malignancy and is estimated to account for 80% of hypercalcemia in patients with cancer. This protein shares a substantial sequence homology with PTH; in fact, 8 of the first 13 amino acids at the N-terminal portion of PTH were identical.⁸ PTHrP has multiple isoforms (PTHrP 141, PTHrP 139, and PTHrP 173). Like PTH, it enhances renal tubular reabsorption of calcium while increasing urinary phosphorus excretion.⁷ The result is both hypercalcemia and hypophosphatemia. However, unlike PTH, PTHrP does not increase 1,25(OH)2D and thus does not increase intestinal absorption of calcium and phosphorus. PTHrP acts on osteoblasts, leading to enhanced synthesis of receptor activator of nuclear factor-κB ligand (RANKL).⁷

In one study, PTHrP was detected immunohistochemically in prostate cancer cells. Iwamura and colleagues used 33 radical prostatectomy specimens from patients with clinically localized carcinoma of the prostate.⁹ None of these patients demonstrated hypercalcemia prior to the surgery. Using a mouse monoclonal antibody to an amino acid fragment, all cases demonstrated some degree of immunoreactivity throughout the cytoplasm of the tumor cells, but immunostaining was absent from inflammatory and stromal cells.⁹Furthermore, the intensity of the staining appeared to directly correlate with increasing tumor grade.⁹

Another study by Iwamura and colleagues suggested that PTHrP may play a significant role in the growth of prostate cancer by acting locally in an autocrine fashion.¹⁰ In this study, all prostate cancer cell lines from different sources expressed PTHrP immunoreactivity as well as evidence of DNA synthesis, the latter being measured by thymidine incorporation assay. Moreover, when these cells were incubated with various concentrations of mouse monoclonal antibody directed to PTHrP fragment, PTHrP-induced DNA synthesis was inhibited in a dose-dependent manner and almost completely neutralized at a specific concentration. Interestingly, the study demonstrated that cancer cell line derived from bone metastatic lesions secreted significantly greater amounts of PTHrP than did the cell line derived from the metastasis in the brain or in the lymph node. These findings suggest that PTHrP production may confer some advantage on the ability of prostate cancer cells to grow in bone.¹⁰

Ando and colleagues reported that neuroendocrine dedifferentiated prostate cancer can develop as a result of long-term ADT even after several years of therapy and has the potential to worsen and develop severe hypercalcemia.⁸ Neuron-specific enolase was used as the specific marker for the neuroendocrine cell, which suggested that the prostate cancer cell derived from the neuroendocrine cell might synthesize PTHrP and be responsible for the observed hypercalcemia.⁸

Other mechanisms cited for hypercalcemia of malignancy include other humoral factors associated with increased remodeling and comprise interleukin 1, 3, 6 (IL-1, IL-3, IL-6); tumor necrosis factor α; transforming growth factor A and B observed in metastatic bone lesions in breast cancer; lymphotoxin; E series prostaglandins; and macrophage inflammatory protein 1α seen in MM.

Local osteolytic hypercalcemia accounts for about 20% of cases and is usually associated with extensive bone metastases. It is most commonly seen in MM and metastatic breast cancer and less commonly in leukemia. The proposed mechanism is thought to be because of the release of local cytokines from the tumor, resulting in excess osteoclast activation and enhanced bone resorption often through RANK/RANKL interaction.

Extrarenal production of 1,25(OH)2D by the tumor accounts for about 1% of cases of hypercalcemia in malignancy. 1,25(OH)2D causes increased intestinal absorption of calcium and enhances osteolytic bone resorption, resulting in increased serum calcium. This mechanism is most commonly seen with Hodgkin and non-Hodgkin lymphoma and had been reported in ovarian dysgerminoma.⁷

In our patient, bone imaging showed osteoblastic lesions, a finding that likely contrasts the local osteolytic bone destruction theory. PTHrP was not significantly elevated in the serum, and PTH levels ruled out any form of primary hyperparathyroidism. In addition, histopathology showed no evidence of mosaicism or neuroendocrine dedifferentiation.

Findings in aggregate tell us that an exact pathophysiologic mechanism leading to hypercalcemia in prostate cancer is still unclear and may involve an interplay between growth factors and possible osteolytic materials, yet it must be studied thoroughly.

Conclusions

Hypercalcemia in pure metastatic adenocarcinoma of prostate is a rare finding and is of uncertain significance. Some studies suggested a search for unusual histopathologies, including neuroendocrine cancer and neuroendocrine dedifferentiation.^8,11 However, in adenocarcinoma alone, it has an uncertain pathophysiology that needs to be further studied. Studies needed to investigate the role of PTHrP as a growth factor for both prostate cancer cells and development of hypercalcemia and possibly target-directed monoclonal antibody therapies may need to be extensively researched.

Hypercalcemia is found when the corrected serum calcium level is > 10.5 mg/dL.¹ Its symptoms are not specific and may include polyuria, dehydration, polydipsia, anorexia, nausea and/or vomiting, constipation, and other central nervous system manifestations, including confusion, delirium, cognitive impairment, muscle weakness, psychotic symptoms, and even coma.^1,2

Hypercalcemia has varied etiologies; however, malignancy-induced hypercalcemia is one of the most common causes. In the US, the most common causes of malignancy-induced hypercalcemia are primary tumors of the lung or breast, multiple myeloma (MM), squamous cell carcinoma of the head or neck, renal cancer, and ovarian cancer.¹

Men with prostate cancer and bone metastasis have relatively worse prognosis than do patient with no metastasis.³ In a recent meta-analysis of patients with bone-involved castration-resistant prostate cancer, the median survival was 21 months.³

Hypercalcemia is a rare manifestation of prostate cancer. In a retrospective study conducted between 2009 and 2013 using the Oncology Services Comprehensive Electronic Records (OSCER) warehouse of electronic health records (EHR), the rates of malignancy-induced hypercalcemia were the lowest among patients with prostate cancer, ranging from 1.4 to 2.1%.¹

We present this case to discuss different pathophysiologic mechanisms leading to hypercalcemia in a patient with prostate cancer with bone metastasis and to study the role of humoral and growth factors in the pathogenesis of the disease.

Case Presentation

An African American man aged 69 years presented to the emergency department (ED) with generalized weakness, fatigue, and lower extremities muscle weakness. He reported a 40-lb weight loss over the past 3 months, intermittent lower back pain, and a 50 pack-year smoking history. A physical examination suggested clinical signs of dehydration.

Laboratory test results indicated hypercalcemia, macrocytic anemia, and thrombocytopenia: calcium 15.8 mg/dL, serum albumin 4.1 mg/dL, alkaline phosphatase 139 μ/L, blood urea nitrogen 55 mg/dL, creatinine 3.4 mg/dL (baseline 1.4-1.5 mg/dL), hemoglobin 8 g/dL, mean corpuscular volume 99.6 fL, and platelets 100,000/μL. The patient was admitted for hypercalcemia. His intact parathyroid hormone (iPTH) was suppressed at 16 pg/mL, phosphorous was 3.8 mg/dL, parathyroid hormone-related peptide (PTHrP) was < 0.74 pmol/L, vitamin D (25 hydroxy cholecalciferol) was mildly decreased at 17.2 ng/mL, and 1,25 dihydroxy cholecalciferol (calcitriol) was < 5.0 (normal range 20-79.3 pg/mL).

A computed tomography (CT) scan of the chest and abdomen was taken due to the patient’s heavy smoking history, an incidentally detected right lung base nodule on chest X-ray, and hypercalcemia. The CT scan showed multiple right middle lobe lung nodules with and without calcifications and calcified right hilar lymph nodes (Figure 1).

To evaluate the pancytopenia, a bone marrow biopsy was done, which showed that 80 to 90% of the marrow space was replaced by fibrosis and metastatic malignancy. Trilinear hematopoiesis was not seen (Figure 2). The tumor cells were positive for prostate- specific membrane antigen (PSMA) and negative for cytokeratin 7 and 20 (CK7 and CK20).⁴ The former is a membrane protein expressed on prostate tissues, including cancer; the latter is a form of protein used to identify adenocarcinoma of unknown primary origin (CK7 usually found in primary/ metastatic lung adenocarcinoma and CK20 usually in primary and some metastatic diseases of colon adenocarcinoma).⁵ A prostatic specific antigen (PSA) test was markedly elevated: 335.94 ng/mL (1.46 ng/mL on a previous 2011 test).

Metastatic adenocarcinoma of the prostate was diagnosed without a prostate biopsy. To determine the extent of bone metastases, a technetium-99m-methylene diphosphonate (MDP) bone scintigraphy demonstrated a superscan with intense foci of increased radiotracer uptake involving the bilateral shoulders, sternoclavicular joints, and sternum with heterogeneous uptake involving bilateral anterior and posterior ribs; cervical, thoracic, and lumbar spines; sacrum, pelvis, and bilateral hips, including the femoral head/neck and intertrochanteric regions. Also noted were several foci of radiotracer uptake involving the mandible and bilateral skull in the region of the temporomandibular joints (Figure 3).

The patient was initially treated with IV isotonic saline, followed by calcitonin and then pamidronate after kidney function improved. His calcium level responded to the therapy, and a plan was made by medical oncology to start androgen deprivation therapy (ADT) prior to discharge.

He was initially treated with bicalutamide, while a luteinizing hormone-releasing hormone agonist (leuprolide) was added 1 week later. Bicalutamide was then discontinued and a combined androgen blockade consisting of leuprolide, ketoconazole, and hydrocortisone was started. This therapy resulted in remission, and PSA declined to 1.73 ng/ mL 3 months later. At that time the patient enrolled in a clinical trial with leuprolide and bicalutamide combined therapy. About 6 months after his diagnosis, patient’s cancer progressed and became hormone refractory disease. At that time, bicalutamide was discontinued, and his therapy was switched to combined leuprolide and enzalutamide. After 6 months of therapy with enzalutamide, the patient’s cancer progressed again. He was later treated with docetaxel chemotherapy but died 16 months after diagnosis.

showed improvement of hypercalcemia at the time of discharge, but 9 months later and toward the time of expiration, our patient developed secondary hyperparathyroidism, with calcium maintained in the normal range, while iPTH was significantly elevated, a finding likely explained by a decline in kidney function and a fall in glomerular filtration rate (Table).

Discussion

Hypercalcemia in the setting of prostate cancer is a rare complication with an uncertain pathophysiology.6 Several mechanisms have been proposed for hypercalcemia of malignancy, these comprise humoral hypercalcemia of malignancy mediated by increased PTHrP; local osteolytic hypercalcemia with secretion of other humoral factors; excess extrarenal activation of vitamin D (1,25[OH]2D); PTH secretion, ectopic or primary; and multiple concurrent etiologies.⁷

PTHrP is the predominant mediator for hypercalcemia of malignancy and is estimated to account for 80% of hypercalcemia in patients with cancer. This protein shares a substantial sequence homology with PTH; in fact, 8 of the first 13 amino acids at the N-terminal portion of PTH were identical.⁸ PTHrP has multiple isoforms (PTHrP 141, PTHrP 139, and PTHrP 173). Like PTH, it enhances renal tubular reabsorption of calcium while increasing urinary phosphorus excretion.⁷ The result is both hypercalcemia and hypophosphatemia. However, unlike PTH, PTHrP does not increase 1,25(OH)2D and thus does not increase intestinal absorption of calcium and phosphorus. PTHrP acts on osteoblasts, leading to enhanced synthesis of receptor activator of nuclear factor-κB ligand (RANKL).⁷

In one study, PTHrP was detected immunohistochemically in prostate cancer cells. Iwamura and colleagues used 33 radical prostatectomy specimens from patients with clinically localized carcinoma of the prostate.⁹ None of these patients demonstrated hypercalcemia prior to the surgery. Using a mouse monoclonal antibody to an amino acid fragment, all cases demonstrated some degree of immunoreactivity throughout the cytoplasm of the tumor cells, but immunostaining was absent from inflammatory and stromal cells.⁹Furthermore, the intensity of the staining appeared to directly correlate with increasing tumor grade.⁹

Another study by Iwamura and colleagues suggested that PTHrP may play a significant role in the growth of prostate cancer by acting locally in an autocrine fashion.¹⁰ In this study, all prostate cancer cell lines from different sources expressed PTHrP immunoreactivity as well as evidence of DNA synthesis, the latter being measured by thymidine incorporation assay. Moreover, when these cells were incubated with various concentrations of mouse monoclonal antibody directed to PTHrP fragment, PTHrP-induced DNA synthesis was inhibited in a dose-dependent manner and almost completely neutralized at a specific concentration. Interestingly, the study demonstrated that cancer cell line derived from bone metastatic lesions secreted significantly greater amounts of PTHrP than did the cell line derived from the metastasis in the brain or in the lymph node. These findings suggest that PTHrP production may confer some advantage on the ability of prostate cancer cells to grow in bone.¹⁰

Ando and colleagues reported that neuroendocrine dedifferentiated prostate cancer can develop as a result of long-term ADT even after several years of therapy and has the potential to worsen and develop severe hypercalcemia.⁸ Neuron-specific enolase was used as the specific marker for the neuroendocrine cell, which suggested that the prostate cancer cell derived from the neuroendocrine cell might synthesize PTHrP and be responsible for the observed hypercalcemia.⁸

Other mechanisms cited for hypercalcemia of malignancy include other humoral factors associated with increased remodeling and comprise interleukin 1, 3, 6 (IL-1, IL-3, IL-6); tumor necrosis factor α; transforming growth factor A and B observed in metastatic bone lesions in breast cancer; lymphotoxin; E series prostaglandins; and macrophage inflammatory protein 1α seen in MM.

Local osteolytic hypercalcemia accounts for about 20% of cases and is usually associated with extensive bone metastases. It is most commonly seen in MM and metastatic breast cancer and less commonly in leukemia. The proposed mechanism is thought to be because of the release of local cytokines from the tumor, resulting in excess osteoclast activation and enhanced bone resorption often through RANK/RANKL interaction.

Extrarenal production of 1,25(OH)2D by the tumor accounts for about 1% of cases of hypercalcemia in malignancy. 1,25(OH)2D causes increased intestinal absorption of calcium and enhances osteolytic bone resorption, resulting in increased serum calcium. This mechanism is most commonly seen with Hodgkin and non-Hodgkin lymphoma and had been reported in ovarian dysgerminoma.⁷

In our patient, bone imaging showed osteoblastic lesions, a finding that likely contrasts the local osteolytic bone destruction theory. PTHrP was not significantly elevated in the serum, and PTH levels ruled out any form of primary hyperparathyroidism. In addition, histopathology showed no evidence of mosaicism or neuroendocrine dedifferentiation.

Findings in aggregate tell us that an exact pathophysiologic mechanism leading to hypercalcemia in prostate cancer is still unclear and may involve an interplay between growth factors and possible osteolytic materials, yet it must be studied thoroughly.

Conclusions

Hypercalcemia in pure metastatic adenocarcinoma of prostate is a rare finding and is of uncertain significance. Some studies suggested a search for unusual histopathologies, including neuroendocrine cancer and neuroendocrine dedifferentiation.^8,11 However, in adenocarcinoma alone, it has an uncertain pathophysiology that needs to be further studied. Studies needed to investigate the role of PTHrP as a growth factor for both prostate cancer cells and development of hypercalcemia and possibly target-directed monoclonal antibody therapies may need to be extensively researched.

Patients in the Veterans Health Administration (VHA) system 75 years or older, free of cardiovascular (CV) disease and prescribed statins for the first time, had a one-fourth lower risk for death and a 20% lower risk for CV death over an average 7 years than that of comparable patients not prescribed the drugs in an observational study.

The findings, based on more than 320,000 predominantly white male patients, initially without atherosclerotic cardiovascular disease (ASCVD), underscore the notion that “age on its own shouldn’t be a criterion not to use these drugs,” Ariela R. Orkaby, MD, MPH, lead author on the study, published in the July 7 issue of JAMA, said in an interview.

The very elderly are frequently undertreated, particularly in primary prevention, as many physicians consider it unnecessary for them to initiate or continue preventive measures, said Dr. Orkaby, of VA Boston Healthcare System and Harvard Medical School, Boston.

“From available data, we don’t really expect statins to start providing benefit in primary prevention until they’ve been taken for about 2 to 5 years. So for people who have very limited life expectancy, it may not be a great idea to add to their pill burden or increase the possibility that they might decline functionally,” Dr. Orkaby said.

“But what we saw in this study is that there is benefit to prescribing statins even in elderly patients, even within 2 years” of follow-up.

Despite being among the most studied drugs in the world, statins are understudied in older people. Fewer than 2% of the 186,854 participants in 28 statin trials were aged 75 years or older, wrote Dr. Orkaby and associates.

Most of what is known about initiating statin therapy in the 75-and-older age group comes from underpowered subgroup analyses and a few observational studies, Steven J. Nicholls, MBBS, PhD, Monash University, Melbourne, and Adam J. Nelson, MBBS, PhD, Duke Clinical Research Institute, Durham, N.C., wrote in an accompanying editorial. As a result, the evidence is conflicting, with some reports suggesting marked benefit and others possible harm.

The current findings, they wrote, “provide additional support for treatment guidelines that have increasingly advocated for more widespread use of statin therapy for ASCVD prevention in older individuals.”

Of the 326,981 people in the analysis, 57,178 (17.5%) were new statin users or initiated a statin during the study period, usually simvastatin. Their mean age was about 81 years, and 97.3% of the patients were men, 90% were white, and 72% were former smokers.

Using propensity scoring, the authors compared statin users with the other remaining patients who had the same likelihood of being prescribed a statin based on clinical characteristics but did not receive a prescription for a statin.

Michael W. Rich, MD, Washington University, St. Louis, who was not involved in the study but has previously worked with Dr. Orkaby, praised the analysis.

“It’s one of the best studies I’ve seen addressing this particular issue. It’s a large sample size, the analysis was very well done, and I think that it comes to a pretty unequivocal conclusion that, at least in this population, those individuals who were started on statins for the first time, and having no known prior ASCVD, clearly had a lower all-cause mortality and cardiovascular mortality, as well as a lower risk of composite cardiovascular events,” he said in an interview.

But the data have limitations, he added. The findings are still observational and could be confounded by unknown variables, and the select population – mostly white, male veterans – is known to be at somewhat higher risk for events than the general population.

Perhaps even more impressive than the risk reductions seen at a mean 6.8 years of follow-up, Dr. Rich said, are the sensitivity analyses at 2, 4, and 6 years that showed the benefit manifesting early.

The researchers saw a 32% reduction in all-cause mortality risk (P < .05) at 2 years, 21% at 4 years, and 13% at 6 years (P < .05 for all). Risk reductions for CV death followed a similar pattern, they wrote.

Dr. Rich said that the trial, although not a “slam dunk,” has persuaded him to shift from being very conservative about prescribing statins to elderly patients to being much more willing to consider it.

“This doesn’t mean that I will be running to routinely prescribe my 90-plus patients a statin, nor should we should be starting statins in everyone over 75, not even in all male former smokers over 75 – the type of people in this study – but I do think that it provides a stronger basis for talking to these patients about the possibility of starting a statin.”

There are two ongoing trials that may provide greater clarity, the authors observed. The STAREE trial has enrolled adults 70 years and older in Australia and includes serial evaluation of cognitive scores. Also, PREVENTABLE will examine the role of statins for prevention of dementia and disability-free survival in adults 75 years and older.

However, neither trial may fully resolve the question of primary prevention statin use in the elderly, they wrote. “While these trials are necessary to broaden the evidence base for older adults, it is unlikely that any trial will enroll large numbers of individuals at very advanced ages, black individuals, and those with dementia, as were included in this study.”

Dr. Orkaby had no disclosures; potential conflicts for the other authors are in the report. Dr. Rich reported having no conflicts of interest. Dr. Nicholls disclosed receiving research support from AstraZeneca, Amgen, Anthera, Eli Lilly, Novartis, Cerenis, The Medicines Company, Resverlogix, InfraReDx, Roche, Sanofi-Regeneron, and LipoScience; and receiving consulting fees or honoraria from AstraZeneca, Eli Lilly, Anthera, Omthera, Merck, Takeda, Resverlogix, Sanofi-Regeneron, CSL Behring, Esperion, and Boehringer Ingelheim. Dr. Nelson had no disclosures.

A version of this article originally appeared on Medscape.com.