Biologics, TNF-inhibitors confer no excess cancer risks upon RA patients

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– Biologics and tumor necrosis factor–inhibitors confer very little – if any – risk of malignancy upon those who take them for rheumatoid arthritis, according to a large Swedish registry study.

A doubling in the risk of squamous cell carcinoma among those who took abatacept was the only significant finding in the 8-year study of almost 70,000 subjects, Hjalmar Wadstrom, said at the European Congress of Rheumatology. And while he said the finding could be spurious, he stressed that it can’t be ignored.

“We think this finding should be interpreted cautiously,” said Mr. Wadstrom, a doctoral student at the Karolinska Institute, Stockholm. “These patients are seen frequently, and this increase in sqaumous cell carcinoma could be related to this multiple screening, or due to study bias. But of course, we cannot disregard it. It should be validated and further examined.”

The study plumbed several national patient registries and administrative databases for its cohort. It comprised 22,500 patients who, from 2006 to 2014, took tocilizumab, abatacept, or rituximab; or a TNF-inhibitor as a first or second disease-modifying antirheumatic drug. These were compared to 46,600 patients who took synthetic DMARDS during the same period and to a matched general population cohort (107,500). The mean age of all groups was about 59 years.

The primary outcome was a first-ever solid or hematologic malignancy excluding nonmelanoma skin cancer. The fully adjusted risk model controlled for age, sex, educational level, comorbidities, seropositivity, number of hospitalizations and days spent in inpatient care, use of prednisone at baseline, use of nonsteroidal anti-inflammatory drugs at baseline, number of prescription drugs at baseline, and sick leave and disability.

A first invasive solid tumor or hematologic malignancy occurred in 50 patients taking tocilizumab; 61 taking abatacept; 141 taking rituximab; 478 taking a TNF-inhibitor as the first biologic DMARD; and 169 taking a TNF-inhibitor as the second DMARD. There was no statistically significant difference between any of these groups, when they were compared either to each other, to those taking a conventional synthetic DMARD, or to the general population.

The doubled risk of squamous cell carcinoma associated with abatacept (HR 2.2) was the only significant positive finding the secondary analysis, Dr. Wadstrom said.

He had no financial disclosures.

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– Biologics and tumor necrosis factor–inhibitors confer very little – if any – risk of malignancy upon those who take them for rheumatoid arthritis, according to a large Swedish registry study.

A doubling in the risk of squamous cell carcinoma among those who took abatacept was the only significant finding in the 8-year study of almost 70,000 subjects, Hjalmar Wadstrom, said at the European Congress of Rheumatology. And while he said the finding could be spurious, he stressed that it can’t be ignored.

“We think this finding should be interpreted cautiously,” said Mr. Wadstrom, a doctoral student at the Karolinska Institute, Stockholm. “These patients are seen frequently, and this increase in sqaumous cell carcinoma could be related to this multiple screening, or due to study bias. But of course, we cannot disregard it. It should be validated and further examined.”

The study plumbed several national patient registries and administrative databases for its cohort. It comprised 22,500 patients who, from 2006 to 2014, took tocilizumab, abatacept, or rituximab; or a TNF-inhibitor as a first or second disease-modifying antirheumatic drug. These were compared to 46,600 patients who took synthetic DMARDS during the same period and to a matched general population cohort (107,500). The mean age of all groups was about 59 years.

The primary outcome was a first-ever solid or hematologic malignancy excluding nonmelanoma skin cancer. The fully adjusted risk model controlled for age, sex, educational level, comorbidities, seropositivity, number of hospitalizations and days spent in inpatient care, use of prednisone at baseline, use of nonsteroidal anti-inflammatory drugs at baseline, number of prescription drugs at baseline, and sick leave and disability.

A first invasive solid tumor or hematologic malignancy occurred in 50 patients taking tocilizumab; 61 taking abatacept; 141 taking rituximab; 478 taking a TNF-inhibitor as the first biologic DMARD; and 169 taking a TNF-inhibitor as the second DMARD. There was no statistically significant difference between any of these groups, when they were compared either to each other, to those taking a conventional synthetic DMARD, or to the general population.

The doubled risk of squamous cell carcinoma associated with abatacept (HR 2.2) was the only significant positive finding the secondary analysis, Dr. Wadstrom said.

He had no financial disclosures.

 

– Biologics and tumor necrosis factor–inhibitors confer very little – if any – risk of malignancy upon those who take them for rheumatoid arthritis, according to a large Swedish registry study.

A doubling in the risk of squamous cell carcinoma among those who took abatacept was the only significant finding in the 8-year study of almost 70,000 subjects, Hjalmar Wadstrom, said at the European Congress of Rheumatology. And while he said the finding could be spurious, he stressed that it can’t be ignored.

“We think this finding should be interpreted cautiously,” said Mr. Wadstrom, a doctoral student at the Karolinska Institute, Stockholm. “These patients are seen frequently, and this increase in sqaumous cell carcinoma could be related to this multiple screening, or due to study bias. But of course, we cannot disregard it. It should be validated and further examined.”

The study plumbed several national patient registries and administrative databases for its cohort. It comprised 22,500 patients who, from 2006 to 2014, took tocilizumab, abatacept, or rituximab; or a TNF-inhibitor as a first or second disease-modifying antirheumatic drug. These were compared to 46,600 patients who took synthetic DMARDS during the same period and to a matched general population cohort (107,500). The mean age of all groups was about 59 years.

The primary outcome was a first-ever solid or hematologic malignancy excluding nonmelanoma skin cancer. The fully adjusted risk model controlled for age, sex, educational level, comorbidities, seropositivity, number of hospitalizations and days spent in inpatient care, use of prednisone at baseline, use of nonsteroidal anti-inflammatory drugs at baseline, number of prescription drugs at baseline, and sick leave and disability.

A first invasive solid tumor or hematologic malignancy occurred in 50 patients taking tocilizumab; 61 taking abatacept; 141 taking rituximab; 478 taking a TNF-inhibitor as the first biologic DMARD; and 169 taking a TNF-inhibitor as the second DMARD. There was no statistically significant difference between any of these groups, when they were compared either to each other, to those taking a conventional synthetic DMARD, or to the general population.

The doubled risk of squamous cell carcinoma associated with abatacept (HR 2.2) was the only significant positive finding the secondary analysis, Dr. Wadstrom said.

He had no financial disclosures.

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Key clinical point: Biologics and TNF-inhibitors did not increase the risk of solid tumors, hematologic malignancy, or melanoma in patients taking them for rheumatoid arthritis.

Major finding: A twofold increased risk of squamous cell carcinoma was associated with abatacept.

Data source: The Swedish study examined almost 70,000 people in various national registries and health care databases.

Disclosures: Mr. Wadstrom had no financial disclosures.

Obeticholic acid fails to prevent liver damage in an animal model of short-bowel syndrome

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Sat, 12/08/2018 - 14:13

 

Obeticholic acid failed to prevent the development of short-bowel syndrome–associated liver disease in a preliminary study using piglet models. The findings were published in the July issue of Cellular and Molecular Gastroenterology and Hepatology (doi: 10.1016/j.jcmgh.2017.02.008).

Current treatment options for short-bowel syndrome-associated liver disease are limited, wrote Prue M. Pereira-Fantini, PhD, of Murdoch Childrens Research Institute, Victoria, Australia, and colleagues. However, the farnesoid X receptor, which regulates genes involved in bile acid synthesis, absorption, and transport in the intestine and liver, has shown promise as a pharmaceutical target.

“Recently, we described SBS-ALD-associated alterations in bile acid composition associated with disrupted farnesoid X receptor (FXR) signaling mechanisms,” the researchers said. Obeticholic acid (OCA) has been shown to prevent liver disease in mouse models and human disease, and the researchers explored whether it would be effective in the context of short-bowel syndrome associated liver disease (SBS-ALD).

The researchers randomized piglets into four groups to receive small-bowel resection or sham surgery, and either a daily dose of 2.4 mg/kg per day of OCA or no treatment. The pigs were euthanized 2 weeks after their surgeries, and the researchers collected portal plasma samples, bile samples, and liver samples.

OCA treatment in piglets in the SBS surgery group was associated with decreased stool fat that suggested improved fat absorption, but impacted liver morphology, the researchers noted. “Untreated, sham-operated piglets showed normal liver histology when compared with SBS piglets who showed decreased hepatic lobule area and small clusters of inflammatory cells together with mild-to-moderate vesicular zone 2 lipidosis,” they wrote.

Overall, OCA treatment prevented the depletion of taurine; taurine concentration was approximately 8 ng/mL for piglets with SBS treated with OCA compared with 8 ng/mL in the sham group, 9 ng/mL in the sham plus OCA group, and 3 ng/mL in the SBS-only group. However, bile acid dysmetabolism occurred as shown by HDCA levels, which increased with OCA treatment compared to sham controls but were significantly reduced in SBS piglets treated with OCA vs. untreated SBS piglets.

In addition, the researchers found that small-bowel resection did not impact gene expression levels of FXR targets in the intestine or liver. However, “intestinal FXR gene expression was 11-fold higher in untreated SBS piglets when compared with untreated sham piglets,” they wrote. OCA treatment had no significant impact on FXR gene expression in the OCA-treated group vs. the untreated group and in the OCA-treated SBS group.

Although the findings were limited by use of an animal model, the results suggest that OCA treatment may have clinical benefits for SBS patients by reducing fat malabsorption, which remains a challenge, the researchers wrote. However, OCA “did not prevent the development of SBS-ALD, thereby limiting the potential therapeutic benefit in patients with SBS,” they concluded.

The researchers had no financial conflicts to disclose. The study was supported in part by the National Health and Medical Research Council of Australia and by a research grant from the Science Foundation Ireland.

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Obeticholic acid failed to prevent the development of short-bowel syndrome–associated liver disease in a preliminary study using piglet models. The findings were published in the July issue of Cellular and Molecular Gastroenterology and Hepatology (doi: 10.1016/j.jcmgh.2017.02.008).

Current treatment options for short-bowel syndrome-associated liver disease are limited, wrote Prue M. Pereira-Fantini, PhD, of Murdoch Childrens Research Institute, Victoria, Australia, and colleagues. However, the farnesoid X receptor, which regulates genes involved in bile acid synthesis, absorption, and transport in the intestine and liver, has shown promise as a pharmaceutical target.

“Recently, we described SBS-ALD-associated alterations in bile acid composition associated with disrupted farnesoid X receptor (FXR) signaling mechanisms,” the researchers said. Obeticholic acid (OCA) has been shown to prevent liver disease in mouse models and human disease, and the researchers explored whether it would be effective in the context of short-bowel syndrome associated liver disease (SBS-ALD).

The researchers randomized piglets into four groups to receive small-bowel resection or sham surgery, and either a daily dose of 2.4 mg/kg per day of OCA or no treatment. The pigs were euthanized 2 weeks after their surgeries, and the researchers collected portal plasma samples, bile samples, and liver samples.

OCA treatment in piglets in the SBS surgery group was associated with decreased stool fat that suggested improved fat absorption, but impacted liver morphology, the researchers noted. “Untreated, sham-operated piglets showed normal liver histology when compared with SBS piglets who showed decreased hepatic lobule area and small clusters of inflammatory cells together with mild-to-moderate vesicular zone 2 lipidosis,” they wrote.

Overall, OCA treatment prevented the depletion of taurine; taurine concentration was approximately 8 ng/mL for piglets with SBS treated with OCA compared with 8 ng/mL in the sham group, 9 ng/mL in the sham plus OCA group, and 3 ng/mL in the SBS-only group. However, bile acid dysmetabolism occurred as shown by HDCA levels, which increased with OCA treatment compared to sham controls but were significantly reduced in SBS piglets treated with OCA vs. untreated SBS piglets.

In addition, the researchers found that small-bowel resection did not impact gene expression levels of FXR targets in the intestine or liver. However, “intestinal FXR gene expression was 11-fold higher in untreated SBS piglets when compared with untreated sham piglets,” they wrote. OCA treatment had no significant impact on FXR gene expression in the OCA-treated group vs. the untreated group and in the OCA-treated SBS group.

Although the findings were limited by use of an animal model, the results suggest that OCA treatment may have clinical benefits for SBS patients by reducing fat malabsorption, which remains a challenge, the researchers wrote. However, OCA “did not prevent the development of SBS-ALD, thereby limiting the potential therapeutic benefit in patients with SBS,” they concluded.

The researchers had no financial conflicts to disclose. The study was supported in part by the National Health and Medical Research Council of Australia and by a research grant from the Science Foundation Ireland.

 

Obeticholic acid failed to prevent the development of short-bowel syndrome–associated liver disease in a preliminary study using piglet models. The findings were published in the July issue of Cellular and Molecular Gastroenterology and Hepatology (doi: 10.1016/j.jcmgh.2017.02.008).

Current treatment options for short-bowel syndrome-associated liver disease are limited, wrote Prue M. Pereira-Fantini, PhD, of Murdoch Childrens Research Institute, Victoria, Australia, and colleagues. However, the farnesoid X receptor, which regulates genes involved in bile acid synthesis, absorption, and transport in the intestine and liver, has shown promise as a pharmaceutical target.

“Recently, we described SBS-ALD-associated alterations in bile acid composition associated with disrupted farnesoid X receptor (FXR) signaling mechanisms,” the researchers said. Obeticholic acid (OCA) has been shown to prevent liver disease in mouse models and human disease, and the researchers explored whether it would be effective in the context of short-bowel syndrome associated liver disease (SBS-ALD).

The researchers randomized piglets into four groups to receive small-bowel resection or sham surgery, and either a daily dose of 2.4 mg/kg per day of OCA or no treatment. The pigs were euthanized 2 weeks after their surgeries, and the researchers collected portal plasma samples, bile samples, and liver samples.

OCA treatment in piglets in the SBS surgery group was associated with decreased stool fat that suggested improved fat absorption, but impacted liver morphology, the researchers noted. “Untreated, sham-operated piglets showed normal liver histology when compared with SBS piglets who showed decreased hepatic lobule area and small clusters of inflammatory cells together with mild-to-moderate vesicular zone 2 lipidosis,” they wrote.

Overall, OCA treatment prevented the depletion of taurine; taurine concentration was approximately 8 ng/mL for piglets with SBS treated with OCA compared with 8 ng/mL in the sham group, 9 ng/mL in the sham plus OCA group, and 3 ng/mL in the SBS-only group. However, bile acid dysmetabolism occurred as shown by HDCA levels, which increased with OCA treatment compared to sham controls but were significantly reduced in SBS piglets treated with OCA vs. untreated SBS piglets.

In addition, the researchers found that small-bowel resection did not impact gene expression levels of FXR targets in the intestine or liver. However, “intestinal FXR gene expression was 11-fold higher in untreated SBS piglets when compared with untreated sham piglets,” they wrote. OCA treatment had no significant impact on FXR gene expression in the OCA-treated group vs. the untreated group and in the OCA-treated SBS group.

Although the findings were limited by use of an animal model, the results suggest that OCA treatment may have clinical benefits for SBS patients by reducing fat malabsorption, which remains a challenge, the researchers wrote. However, OCA “did not prevent the development of SBS-ALD, thereby limiting the potential therapeutic benefit in patients with SBS,” they concluded.

The researchers had no financial conflicts to disclose. The study was supported in part by the National Health and Medical Research Council of Australia and by a research grant from the Science Foundation Ireland.

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Key clinical point: Treatment with obeticholic acid improved absorption and altered bile acid, but did not prevent liver damage in a piglet model of short-bowel syndrome.

Major finding: Overall, taurine concentration was approximately 8 ng/mL for piglets with SBS treated with OCA compared with 8 ng/mL in the sham surgery group, 9 ng/mL in the sham treated with OCA group, and 3 ng/mL in the SBS-only group.

Data source: The data come from piglets treated with obeticholic acid or untreated, and randomized to a small-bowel resection or a sham surgery.

Disclosures: The researchers had no financial conflicts to disclose,

Gene editing aims to recreate beneficial mutation in SCD, beta-thalassemia

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Fri, 01/04/2019 - 10:05

 

– With some genetic sleight-of-hand, investigators hope to mimic a rare, naturally occurring mutation that protects some patients with beta-thalassemia or sickle-cell disease (SCD) from becoming symptomatic.

Although human studies have yet to begin, investigators in a biotech company report that they can use CRISPR/Cas9 gene editing to recreate the rare condition known as hereditary persistence of fetal hemoglobin, or HPFH, which causes some patients with SCD or beta-thalassemia to continue to produce the fully functional fetal rather than adult form of hemoglobin into adulthood.

Neil Osterweil/Frontline Medical News
Dr. Sven Ante Lundeberg
“We have recreated the naturally occurring HPFH genetic variants with high efficiency, and demonstrated relevant and meaningful increases in the gamma-globin component of protective fetal hemoglobin,” said Sven Ante Lundeberg, MD, from CRISPR Therapeutics in Cambridge, Mass.

To date, there have been no detectable undesirable off-target genetic modifications seen by targeted deep sequencing for the two leading guide RNAs (gRNA) in development, he said at the annual congress of the European Hematology Association.

“Patients with sickle-cell disease and beta-thalassemia are not sick when they are first born, but symptoms develop shortly after birth as the fetal hemoglobin levels decline, and as adult hemoglobin rises,” Dr. Lundberg said.

Fetal hemoglobin has been shown to reduce the risk of sickle events in SCD, and reduce symptoms and morbidity of beta-thalassemia.

“Modest amounts of fetal hemoglobin are beneficial, and more appears to be better,” he said.

In rare instances, the genetic switch to turn off fetal hemoglobin fails, leading to HPFH. It is this rare circumstance that the investigators hope to copy.

CRISPR/Cas9 technology copies a bacterial defense mechanism using clustered regularly interspaced short palindromic (CRISPR) repeats of DNA as a template for adaptive immunity against viruses and plasmids. The system allows bacteria to prevent the activation of invading nucleic acids by effectively snipping out target sequences of foreign DNA.

The investigators plan to harvest hematopoietic stem cells from patients with SCD and beta-thalassemia and use CRISPR/Cas9 technology to modify the cells to express the fetal form of hemoglobin. The reintroduced stem cells would, ideally, proliferate and help protect patients against painful crises and debilitating symptoms of the hemoglobinopathies.

Dr. Lundberg said that to date they have been able to edit blood stem cells with more than 80% on-target efficiency, and that the editing leads to “clinically meaningful” levels of protective fetal hemoglobin, in the range of 30%.

As noted, the investigators have to date seen no evidence of off-target editing that could lead to undesirable or dangerous complications. When introduced into an immunodeficient mouse model (NOD scid gamma, or NSG mice), the edited human cells persisted for long periods.

Finally, the investigators have been able to demonstrate that the modified stem cells are able to differentiate and reconstitute different types of cells in blood.

The company plans to submit a clinical trial application in 2017, and start clinical trials in 2018, Dr. Lundberg said.

At a media briefing where he discussed his research prior to his presentation of data in a symposium, Dr. Lundberg said that to date they have worked only with mouse models and with cells from healthy donors.

Neil Osterweil/Frontline Medical News
Dr. Anton Hagenbeek
Anton Hagenbeek, MD, PhD, from the Academic Medical Center at the University of Amsterdam, the Netherlands, who attended the briefing but was not involved in the study, complimented Dr. Lundberg on the work and called it “very promising.”

He pointed out, however, that there are many thousands of patients with inherited hemoglobin disorders worldwide and beta-thalassemia, and asked “how do you proceed to implement this very expensive treatment?”

Dr. Lundberg acknowledged that the diseases are common in both the developing world and in wealthy countries. He said that the technique relies as much as possible on existing technologies, and pointed out that if the treatment is successful, it’s costs could be at least partially offset by reducing the costs of other forms of therapy.

The work is supported by CRISPR Therapeutics. Dr. Lundberg is an employee and shareholder in the company. Dr. Hagenbeek reported having no relevant conflicts of interest.

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– With some genetic sleight-of-hand, investigators hope to mimic a rare, naturally occurring mutation that protects some patients with beta-thalassemia or sickle-cell disease (SCD) from becoming symptomatic.

Although human studies have yet to begin, investigators in a biotech company report that they can use CRISPR/Cas9 gene editing to recreate the rare condition known as hereditary persistence of fetal hemoglobin, or HPFH, which causes some patients with SCD or beta-thalassemia to continue to produce the fully functional fetal rather than adult form of hemoglobin into adulthood.

Neil Osterweil/Frontline Medical News
Dr. Sven Ante Lundeberg
“We have recreated the naturally occurring HPFH genetic variants with high efficiency, and demonstrated relevant and meaningful increases in the gamma-globin component of protective fetal hemoglobin,” said Sven Ante Lundeberg, MD, from CRISPR Therapeutics in Cambridge, Mass.

To date, there have been no detectable undesirable off-target genetic modifications seen by targeted deep sequencing for the two leading guide RNAs (gRNA) in development, he said at the annual congress of the European Hematology Association.

“Patients with sickle-cell disease and beta-thalassemia are not sick when they are first born, but symptoms develop shortly after birth as the fetal hemoglobin levels decline, and as adult hemoglobin rises,” Dr. Lundberg said.

Fetal hemoglobin has been shown to reduce the risk of sickle events in SCD, and reduce symptoms and morbidity of beta-thalassemia.

“Modest amounts of fetal hemoglobin are beneficial, and more appears to be better,” he said.

In rare instances, the genetic switch to turn off fetal hemoglobin fails, leading to HPFH. It is this rare circumstance that the investigators hope to copy.

CRISPR/Cas9 technology copies a bacterial defense mechanism using clustered regularly interspaced short palindromic (CRISPR) repeats of DNA as a template for adaptive immunity against viruses and plasmids. The system allows bacteria to prevent the activation of invading nucleic acids by effectively snipping out target sequences of foreign DNA.

The investigators plan to harvest hematopoietic stem cells from patients with SCD and beta-thalassemia and use CRISPR/Cas9 technology to modify the cells to express the fetal form of hemoglobin. The reintroduced stem cells would, ideally, proliferate and help protect patients against painful crises and debilitating symptoms of the hemoglobinopathies.

Dr. Lundberg said that to date they have been able to edit blood stem cells with more than 80% on-target efficiency, and that the editing leads to “clinically meaningful” levels of protective fetal hemoglobin, in the range of 30%.

As noted, the investigators have to date seen no evidence of off-target editing that could lead to undesirable or dangerous complications. When introduced into an immunodeficient mouse model (NOD scid gamma, or NSG mice), the edited human cells persisted for long periods.

Finally, the investigators have been able to demonstrate that the modified stem cells are able to differentiate and reconstitute different types of cells in blood.

The company plans to submit a clinical trial application in 2017, and start clinical trials in 2018, Dr. Lundberg said.

At a media briefing where he discussed his research prior to his presentation of data in a symposium, Dr. Lundberg said that to date they have worked only with mouse models and with cells from healthy donors.

Neil Osterweil/Frontline Medical News
Dr. Anton Hagenbeek
Anton Hagenbeek, MD, PhD, from the Academic Medical Center at the University of Amsterdam, the Netherlands, who attended the briefing but was not involved in the study, complimented Dr. Lundberg on the work and called it “very promising.”

He pointed out, however, that there are many thousands of patients with inherited hemoglobin disorders worldwide and beta-thalassemia, and asked “how do you proceed to implement this very expensive treatment?”

Dr. Lundberg acknowledged that the diseases are common in both the developing world and in wealthy countries. He said that the technique relies as much as possible on existing technologies, and pointed out that if the treatment is successful, it’s costs could be at least partially offset by reducing the costs of other forms of therapy.

The work is supported by CRISPR Therapeutics. Dr. Lundberg is an employee and shareholder in the company. Dr. Hagenbeek reported having no relevant conflicts of interest.

 

– With some genetic sleight-of-hand, investigators hope to mimic a rare, naturally occurring mutation that protects some patients with beta-thalassemia or sickle-cell disease (SCD) from becoming symptomatic.

Although human studies have yet to begin, investigators in a biotech company report that they can use CRISPR/Cas9 gene editing to recreate the rare condition known as hereditary persistence of fetal hemoglobin, or HPFH, which causes some patients with SCD or beta-thalassemia to continue to produce the fully functional fetal rather than adult form of hemoglobin into adulthood.

Neil Osterweil/Frontline Medical News
Dr. Sven Ante Lundeberg
“We have recreated the naturally occurring HPFH genetic variants with high efficiency, and demonstrated relevant and meaningful increases in the gamma-globin component of protective fetal hemoglobin,” said Sven Ante Lundeberg, MD, from CRISPR Therapeutics in Cambridge, Mass.

To date, there have been no detectable undesirable off-target genetic modifications seen by targeted deep sequencing for the two leading guide RNAs (gRNA) in development, he said at the annual congress of the European Hematology Association.

“Patients with sickle-cell disease and beta-thalassemia are not sick when they are first born, but symptoms develop shortly after birth as the fetal hemoglobin levels decline, and as adult hemoglobin rises,” Dr. Lundberg said.

Fetal hemoglobin has been shown to reduce the risk of sickle events in SCD, and reduce symptoms and morbidity of beta-thalassemia.

“Modest amounts of fetal hemoglobin are beneficial, and more appears to be better,” he said.

In rare instances, the genetic switch to turn off fetal hemoglobin fails, leading to HPFH. It is this rare circumstance that the investigators hope to copy.

CRISPR/Cas9 technology copies a bacterial defense mechanism using clustered regularly interspaced short palindromic (CRISPR) repeats of DNA as a template for adaptive immunity against viruses and plasmids. The system allows bacteria to prevent the activation of invading nucleic acids by effectively snipping out target sequences of foreign DNA.

The investigators plan to harvest hematopoietic stem cells from patients with SCD and beta-thalassemia and use CRISPR/Cas9 technology to modify the cells to express the fetal form of hemoglobin. The reintroduced stem cells would, ideally, proliferate and help protect patients against painful crises and debilitating symptoms of the hemoglobinopathies.

Dr. Lundberg said that to date they have been able to edit blood stem cells with more than 80% on-target efficiency, and that the editing leads to “clinically meaningful” levels of protective fetal hemoglobin, in the range of 30%.

As noted, the investigators have to date seen no evidence of off-target editing that could lead to undesirable or dangerous complications. When introduced into an immunodeficient mouse model (NOD scid gamma, or NSG mice), the edited human cells persisted for long periods.

Finally, the investigators have been able to demonstrate that the modified stem cells are able to differentiate and reconstitute different types of cells in blood.

The company plans to submit a clinical trial application in 2017, and start clinical trials in 2018, Dr. Lundberg said.

At a media briefing where he discussed his research prior to his presentation of data in a symposium, Dr. Lundberg said that to date they have worked only with mouse models and with cells from healthy donors.

Neil Osterweil/Frontline Medical News
Dr. Anton Hagenbeek
Anton Hagenbeek, MD, PhD, from the Academic Medical Center at the University of Amsterdam, the Netherlands, who attended the briefing but was not involved in the study, complimented Dr. Lundberg on the work and called it “very promising.”

He pointed out, however, that there are many thousands of patients with inherited hemoglobin disorders worldwide and beta-thalassemia, and asked “how do you proceed to implement this very expensive treatment?”

Dr. Lundberg acknowledged that the diseases are common in both the developing world and in wealthy countries. He said that the technique relies as much as possible on existing technologies, and pointed out that if the treatment is successful, it’s costs could be at least partially offset by reducing the costs of other forms of therapy.

The work is supported by CRISPR Therapeutics. Dr. Lundberg is an employee and shareholder in the company. Dr. Hagenbeek reported having no relevant conflicts of interest.

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Key clinical point: The fetal form of hemoglobin is protective against symptoms of sickle-cell disease (SCD) and beta-thalassemia.

Major finding: Human blood stem cells modified by CRISPR/Cas9 gene editing produced fetal hemoglobin without observable off-target effects.

Data source: Summary of preclinical studies with blood from healthy human volunteers and mouse models.

Disclosures: The work is supported by CRISPR Therapeutics. Dr. Lundberg is an employee and shareholder in the company. Dr. Hagenbeek reported having no relevant conflicts of interest.

Oral insulin matches glargine in phase II trial

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Tue, 05/03/2022 - 15:29

 

– In an industry-funded phase II trial, researchers say they’ve shown for the first time that oral basal insulin tablets can safely decrease plasma glucose in patients with type 2 diabetes (T2DM).

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– In an industry-funded phase II trial, researchers say they’ve shown for the first time that oral basal insulin tablets can safely decrease plasma glucose in patients with type 2 diabetes (T2DM).

 

– In an industry-funded phase II trial, researchers say they’ve shown for the first time that oral basal insulin tablets can safely decrease plasma glucose in patients with type 2 diabetes (T2DM).

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Key clinical point: In 8-week trial, oral insulin tablets produce similar glucose control to injectable glargine (IGlar) in patients with type 2 diabetes (T2DM).

Major finding: Mean levels fasting plasma glucose (FPG, mg/dL) declined from 175 ± 50 to 129 ± 33 (investigational medication) and from 164 ± 31 to 121 ± 17 (IGlar). The treatment difference (investigational medication – IGlar) was 5.2 mg/dL [–8.8;19.1], 95% CI, P = .4567.

Data source: 50 insulin-naive patients with T2DM randomly assigned (1:1) to daily doses of investigational oral medication or IGlar for 8 weeks, titrated to reach target FPG of 80-126 mg/dL.

Disclosures: Novo Nordisk funded the trial. Dr. Plum-Mörschel reports no disclosures.

Developments on the malaria front

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Fri, 06/04/2021 - 13:54
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Developments on the malaria front

 

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Malaria-infected cell bursting

 

Progress is being made in the battle against malaria. From engineering a mosquito-killing fungus to discovering new anti-malaria targets, scientists are making advances on multiple malaria fronts.

 

And US aid to combat malaria is having a positive impact on reducing childhood mortality in 19 sub-Saharan countries.  A few of the recent developments are described here.

 

Genetic engineering

 

Scientists developed a genetic technique that disrupts the heme synthesis pathway in Plasmodium berghei parasites, which could be an effective way to target Plasmodium parasites in the liver.

 

Heme synthesis is essential for P berghei development in mosquitoes that transmit the parasite between rodent hosts. However, the pathway is not essential during a later stage of the parasite’s development in the bloodstream.

 

So researchers produced P berghei parasites capable of expressing the FC gene. The FC (ferrochelatase) gene allows P berghei to produce heme. The parasites could develop properly in mosquitoes, but produced some FC-deficient parasites once they infected mouse liver cells.

 

FC-deficient parasites were unable to complete their liver development phase.

 

The team says this approach would be prophylactic, since malaria symptoms aren't apparent until the parasite leaves the liver and begins its bloodstream phase.

 

The team published its findings in PLOS Pathogens.

 

Mosquito-killing fungi

 

 In a report that sounds almost like a science fiction story, researchers genetically engineered a fungus to kill mosquitoes by producing spider and scorpion toxins.

 

They suggest this method could serve as a highly effective biological control mechanism to fight malaria-carrying mosquitoes.

 

The researchers isolated genes that express neurotoxins from the venom of scorpions and spiders. They then engineered the genes into the fungus's DNA.

 

The researchers used the fungus Metarhizium pingshaensei, which is a natural killer of mosquitoes.

 

The fungus was originally isolated from a mosquito and previous evidence suggests it is specific to disease-carrying mosquito species, including Anopheles gambiae and Aedes aegypti.

 

When spores of the fungus contact a mosquito's body, the spores germinate and penetrate the insect's exoskeleton, eventually killing the insect host from the inside out.

 

And the most potent fungal strains, Brian Lovett, a graduate student at the University of Maryland in College Park, explained, “are able to kill mosquitoes with a single spore."

 

He added that the fungi also stop mosquitoes from blood feeding. Taken together, this means “that our fungal strains are capable of preventing transmission of disease by more than 90 percent of mosquitoes after just 5 days."

 

The fungus is specific to mosquitoes and does not pose a risk to humans. The study results also suggest the fungus is safe for honeybees and other insects.

 

The researchers plan to expand on-the-ground testing in Burkina Faso.

 

For more on this mosquito-killing approach, see their study published in Scientific Reports.

 

Potential new target

 

Researchers have described a new protein, the transcription factor PfAP2-I, which they say may turn out to be an effective target to combat drug-resistant malaria parasites.

 

PfAP2-I regulates genes involved with the parasite's invasion of red blood cells. This is a critical part of the parasite's 3-stage life cycle that could be targeted by new anti-malarial drugs.

 

“Most multi-celled organisms have hundreds of these regulators,” said lead author Manuel Llinás, PhD, of Penn State University in State College, Pennsylvania, “but it turns out, so far as we can recognize, the [Plasmodium] parasite has a single family of transcription factors called Apicomplexan AP2 proteins. One of these transcription factors is PfAP2-I."

 

PfAP2-I is the first known regulator of invasion genes in Plasmodium falciparum.

 

 

 

The new study also indicates that PfAP2-I likely recruits another protein, Bromodomain Protein 1 (PfBDP1), which was previously shown to be involved in the invasion of red blood cells.

 

The two proteins may work together to regulate gene transcription during this critical stage of infection.

 

For more on this potential new target, see their study published in Cell Host & Microbe.

 

Parasite diversity

 

 Not all malaria infections result in life-threatening anemia and organ failure, and so a research team led by Matthew B. B. McCall, MD, PhD, of Erasmus Medical Center in Rotterdam, the Netherlands, set out to determine why.

 

They exposed 23 healthy human volunteers to sets of 5 mosquitoes carrying the NF54, NF135.C10, or NF166.C8 isolates of P falciparum.

 

All volunteers developed parasitemia, were treated with anti-malarial drugs, and recovered, although some strains caused more severe symptoms.

 

The investigators found that 3 geographic and genetically diverse forms of the parasite each demonstrated a distinct ability to infect liver cells.

 

They also observed the degree of infection in human liver cells growing in culture was closely correlated with parasite loads in the bloodstream.

 

The investigators believe the variability among parasite types suggests that malaria vaccines should use multiple strains.

 

In addition, the infectivity of different parasite strains could vary in populations previously exposed to malaria.

 

For more details on parasite diversity, see the team’s findings in Science Translational Medicine.

 

Malaria test

 

A new malaria test can diagnose malaria faster and more reliably than current methods, according to a report in the NL Times.

 

The new test uses an algorithm that can diagnose malaria at a rate of 120 blood tests per hour.  It is 97% accurate.

 

Rather than search for the parasite itself in blood samples, the new test analyzes the effect the infection has on the blood, such as shape and density of red blood cells, hemoglobin level, and 27 other parameters simultaneously.

 

The developers won the European Inventor Award for the rapid malaria test, which will be further developed by Siemens.

 

Aid to combat malaria

 

The US malaria initiative in 19 sub-Saharan African countries has contributed to a 16% reduction in the annual risk of mortality for children under 5 years, according to a new study published in PLOS Medicine.

 

Thirteen sub-Saharan countries did not receive funding from the initiative, which allowed researchers to compare and analyze the impact of the intervention.

 

Because the study may have had confounding variables that were not measured, however, the results could not be definitively interpreted as causal evidence of the reduction in child mortality rates.

 

However, they do indicate an association between the receipt of funding and mortality.

 

The funding went to support malaria prevention technologies, such as insecticide-treated nets and indoor residual spraying.

 

The authors believe further investment in these interventions “may translate to additional lives saved, reduced household financial burdens associated with caring for ill household members and lost wages, and less strain on health systems associated with treating malaria cases.”

 

Countries that received funding included: Angola, Benin, Congo DRC, Ethiopia, Ghana, Guinea, Kenya, Liberia, Madagascar, Malawi, Mali, Mozambique, Nigeria, Rwanda, Senegal, Tanzania, Uganda, Zambia, and Zimbabwe.

 

Comparison countries include: Burkina Faso, Burundi, Cameroon, Chad, Congo, Cote d’Ivoire, Gabon, Namibia, Niger, Sierra Leone, Swaziland, The Gambia, and Togo. 

 

 

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Image by Peter H. Seeberger
Malaria-infected cell bursting

 

Progress is being made in the battle against malaria. From engineering a mosquito-killing fungus to discovering new anti-malaria targets, scientists are making advances on multiple malaria fronts.

 

And US aid to combat malaria is having a positive impact on reducing childhood mortality in 19 sub-Saharan countries.  A few of the recent developments are described here.

 

Genetic engineering

 

Scientists developed a genetic technique that disrupts the heme synthesis pathway in Plasmodium berghei parasites, which could be an effective way to target Plasmodium parasites in the liver.

 

Heme synthesis is essential for P berghei development in mosquitoes that transmit the parasite between rodent hosts. However, the pathway is not essential during a later stage of the parasite’s development in the bloodstream.

 

So researchers produced P berghei parasites capable of expressing the FC gene. The FC (ferrochelatase) gene allows P berghei to produce heme. The parasites could develop properly in mosquitoes, but produced some FC-deficient parasites once they infected mouse liver cells.

 

FC-deficient parasites were unable to complete their liver development phase.

 

The team says this approach would be prophylactic, since malaria symptoms aren't apparent until the parasite leaves the liver and begins its bloodstream phase.

 

The team published its findings in PLOS Pathogens.

 

Mosquito-killing fungi

 

 In a report that sounds almost like a science fiction story, researchers genetically engineered a fungus to kill mosquitoes by producing spider and scorpion toxins.

 

They suggest this method could serve as a highly effective biological control mechanism to fight malaria-carrying mosquitoes.

 

The researchers isolated genes that express neurotoxins from the venom of scorpions and spiders. They then engineered the genes into the fungus's DNA.

 

The researchers used the fungus Metarhizium pingshaensei, which is a natural killer of mosquitoes.

 

The fungus was originally isolated from a mosquito and previous evidence suggests it is specific to disease-carrying mosquito species, including Anopheles gambiae and Aedes aegypti.

 

When spores of the fungus contact a mosquito's body, the spores germinate and penetrate the insect's exoskeleton, eventually killing the insect host from the inside out.

 

And the most potent fungal strains, Brian Lovett, a graduate student at the University of Maryland in College Park, explained, “are able to kill mosquitoes with a single spore."

 

He added that the fungi also stop mosquitoes from blood feeding. Taken together, this means “that our fungal strains are capable of preventing transmission of disease by more than 90 percent of mosquitoes after just 5 days."

 

The fungus is specific to mosquitoes and does not pose a risk to humans. The study results also suggest the fungus is safe for honeybees and other insects.

 

The researchers plan to expand on-the-ground testing in Burkina Faso.

 

For more on this mosquito-killing approach, see their study published in Scientific Reports.

 

Potential new target

 

Researchers have described a new protein, the transcription factor PfAP2-I, which they say may turn out to be an effective target to combat drug-resistant malaria parasites.

 

PfAP2-I regulates genes involved with the parasite's invasion of red blood cells. This is a critical part of the parasite's 3-stage life cycle that could be targeted by new anti-malarial drugs.

 

“Most multi-celled organisms have hundreds of these regulators,” said lead author Manuel Llinás, PhD, of Penn State University in State College, Pennsylvania, “but it turns out, so far as we can recognize, the [Plasmodium] parasite has a single family of transcription factors called Apicomplexan AP2 proteins. One of these transcription factors is PfAP2-I."

 

PfAP2-I is the first known regulator of invasion genes in Plasmodium falciparum.

 

 

 

The new study also indicates that PfAP2-I likely recruits another protein, Bromodomain Protein 1 (PfBDP1), which was previously shown to be involved in the invasion of red blood cells.

 

The two proteins may work together to regulate gene transcription during this critical stage of infection.

 

For more on this potential new target, see their study published in Cell Host & Microbe.

 

Parasite diversity

 

 Not all malaria infections result in life-threatening anemia and organ failure, and so a research team led by Matthew B. B. McCall, MD, PhD, of Erasmus Medical Center in Rotterdam, the Netherlands, set out to determine why.

 

They exposed 23 healthy human volunteers to sets of 5 mosquitoes carrying the NF54, NF135.C10, or NF166.C8 isolates of P falciparum.

 

All volunteers developed parasitemia, were treated with anti-malarial drugs, and recovered, although some strains caused more severe symptoms.

 

The investigators found that 3 geographic and genetically diverse forms of the parasite each demonstrated a distinct ability to infect liver cells.

 

They also observed the degree of infection in human liver cells growing in culture was closely correlated with parasite loads in the bloodstream.

 

The investigators believe the variability among parasite types suggests that malaria vaccines should use multiple strains.

 

In addition, the infectivity of different parasite strains could vary in populations previously exposed to malaria.

 

For more details on parasite diversity, see the team’s findings in Science Translational Medicine.

 

Malaria test

 

A new malaria test can diagnose malaria faster and more reliably than current methods, according to a report in the NL Times.

 

The new test uses an algorithm that can diagnose malaria at a rate of 120 blood tests per hour.  It is 97% accurate.

 

Rather than search for the parasite itself in blood samples, the new test analyzes the effect the infection has on the blood, such as shape and density of red blood cells, hemoglobin level, and 27 other parameters simultaneously.

 

The developers won the European Inventor Award for the rapid malaria test, which will be further developed by Siemens.

 

Aid to combat malaria

 

The US malaria initiative in 19 sub-Saharan African countries has contributed to a 16% reduction in the annual risk of mortality for children under 5 years, according to a new study published in PLOS Medicine.

 

Thirteen sub-Saharan countries did not receive funding from the initiative, which allowed researchers to compare and analyze the impact of the intervention.

 

Because the study may have had confounding variables that were not measured, however, the results could not be definitively interpreted as causal evidence of the reduction in child mortality rates.

 

However, they do indicate an association between the receipt of funding and mortality.

 

The funding went to support malaria prevention technologies, such as insecticide-treated nets and indoor residual spraying.

 

The authors believe further investment in these interventions “may translate to additional lives saved, reduced household financial burdens associated with caring for ill household members and lost wages, and less strain on health systems associated with treating malaria cases.”

 

Countries that received funding included: Angola, Benin, Congo DRC, Ethiopia, Ghana, Guinea, Kenya, Liberia, Madagascar, Malawi, Mali, Mozambique, Nigeria, Rwanda, Senegal, Tanzania, Uganda, Zambia, and Zimbabwe.

 

Comparison countries include: Burkina Faso, Burundi, Cameroon, Chad, Congo, Cote d’Ivoire, Gabon, Namibia, Niger, Sierra Leone, Swaziland, The Gambia, and Togo. 

 

 

 

Image by Peter H. Seeberger
Malaria-infected cell bursting

 

Progress is being made in the battle against malaria. From engineering a mosquito-killing fungus to discovering new anti-malaria targets, scientists are making advances on multiple malaria fronts.

 

And US aid to combat malaria is having a positive impact on reducing childhood mortality in 19 sub-Saharan countries.  A few of the recent developments are described here.

 

Genetic engineering

 

Scientists developed a genetic technique that disrupts the heme synthesis pathway in Plasmodium berghei parasites, which could be an effective way to target Plasmodium parasites in the liver.

 

Heme synthesis is essential for P berghei development in mosquitoes that transmit the parasite between rodent hosts. However, the pathway is not essential during a later stage of the parasite’s development in the bloodstream.

 

So researchers produced P berghei parasites capable of expressing the FC gene. The FC (ferrochelatase) gene allows P berghei to produce heme. The parasites could develop properly in mosquitoes, but produced some FC-deficient parasites once they infected mouse liver cells.

 

FC-deficient parasites were unable to complete their liver development phase.

 

The team says this approach would be prophylactic, since malaria symptoms aren't apparent until the parasite leaves the liver and begins its bloodstream phase.

 

The team published its findings in PLOS Pathogens.

 

Mosquito-killing fungi

 

 In a report that sounds almost like a science fiction story, researchers genetically engineered a fungus to kill mosquitoes by producing spider and scorpion toxins.

 

They suggest this method could serve as a highly effective biological control mechanism to fight malaria-carrying mosquitoes.

 

The researchers isolated genes that express neurotoxins from the venom of scorpions and spiders. They then engineered the genes into the fungus's DNA.

 

The researchers used the fungus Metarhizium pingshaensei, which is a natural killer of mosquitoes.

 

The fungus was originally isolated from a mosquito and previous evidence suggests it is specific to disease-carrying mosquito species, including Anopheles gambiae and Aedes aegypti.

 

When spores of the fungus contact a mosquito's body, the spores germinate and penetrate the insect's exoskeleton, eventually killing the insect host from the inside out.

 

And the most potent fungal strains, Brian Lovett, a graduate student at the University of Maryland in College Park, explained, “are able to kill mosquitoes with a single spore."

 

He added that the fungi also stop mosquitoes from blood feeding. Taken together, this means “that our fungal strains are capable of preventing transmission of disease by more than 90 percent of mosquitoes after just 5 days."

 

The fungus is specific to mosquitoes and does not pose a risk to humans. The study results also suggest the fungus is safe for honeybees and other insects.

 

The researchers plan to expand on-the-ground testing in Burkina Faso.

 

For more on this mosquito-killing approach, see their study published in Scientific Reports.

 

Potential new target

 

Researchers have described a new protein, the transcription factor PfAP2-I, which they say may turn out to be an effective target to combat drug-resistant malaria parasites.

 

PfAP2-I regulates genes involved with the parasite's invasion of red blood cells. This is a critical part of the parasite's 3-stage life cycle that could be targeted by new anti-malarial drugs.

 

“Most multi-celled organisms have hundreds of these regulators,” said lead author Manuel Llinás, PhD, of Penn State University in State College, Pennsylvania, “but it turns out, so far as we can recognize, the [Plasmodium] parasite has a single family of transcription factors called Apicomplexan AP2 proteins. One of these transcription factors is PfAP2-I."

 

PfAP2-I is the first known regulator of invasion genes in Plasmodium falciparum.

 

 

 

The new study also indicates that PfAP2-I likely recruits another protein, Bromodomain Protein 1 (PfBDP1), which was previously shown to be involved in the invasion of red blood cells.

 

The two proteins may work together to regulate gene transcription during this critical stage of infection.

 

For more on this potential new target, see their study published in Cell Host & Microbe.

 

Parasite diversity

 

 Not all malaria infections result in life-threatening anemia and organ failure, and so a research team led by Matthew B. B. McCall, MD, PhD, of Erasmus Medical Center in Rotterdam, the Netherlands, set out to determine why.

 

They exposed 23 healthy human volunteers to sets of 5 mosquitoes carrying the NF54, NF135.C10, or NF166.C8 isolates of P falciparum.

 

All volunteers developed parasitemia, were treated with anti-malarial drugs, and recovered, although some strains caused more severe symptoms.

 

The investigators found that 3 geographic and genetically diverse forms of the parasite each demonstrated a distinct ability to infect liver cells.

 

They also observed the degree of infection in human liver cells growing in culture was closely correlated with parasite loads in the bloodstream.

 

The investigators believe the variability among parasite types suggests that malaria vaccines should use multiple strains.

 

In addition, the infectivity of different parasite strains could vary in populations previously exposed to malaria.

 

For more details on parasite diversity, see the team’s findings in Science Translational Medicine.

 

Malaria test

 

A new malaria test can diagnose malaria faster and more reliably than current methods, according to a report in the NL Times.

 

The new test uses an algorithm that can diagnose malaria at a rate of 120 blood tests per hour.  It is 97% accurate.

 

Rather than search for the parasite itself in blood samples, the new test analyzes the effect the infection has on the blood, such as shape and density of red blood cells, hemoglobin level, and 27 other parameters simultaneously.

 

The developers won the European Inventor Award for the rapid malaria test, which will be further developed by Siemens.

 

Aid to combat malaria

 

The US malaria initiative in 19 sub-Saharan African countries has contributed to a 16% reduction in the annual risk of mortality for children under 5 years, according to a new study published in PLOS Medicine.

 

Thirteen sub-Saharan countries did not receive funding from the initiative, which allowed researchers to compare and analyze the impact of the intervention.

 

Because the study may have had confounding variables that were not measured, however, the results could not be definitively interpreted as causal evidence of the reduction in child mortality rates.

 

However, they do indicate an association between the receipt of funding and mortality.

 

The funding went to support malaria prevention technologies, such as insecticide-treated nets and indoor residual spraying.

 

The authors believe further investment in these interventions “may translate to additional lives saved, reduced household financial burdens associated with caring for ill household members and lost wages, and less strain on health systems associated with treating malaria cases.”

 

Countries that received funding included: Angola, Benin, Congo DRC, Ethiopia, Ghana, Guinea, Kenya, Liberia, Madagascar, Malawi, Mali, Mozambique, Nigeria, Rwanda, Senegal, Tanzania, Uganda, Zambia, and Zimbabwe.

 

Comparison countries include: Burkina Faso, Burundi, Cameroon, Chad, Congo, Cote d’Ivoire, Gabon, Namibia, Niger, Sierra Leone, Swaziland, The Gambia, and Togo. 

 

 

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Safety data review finds no increased risk of infection from abatacept

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– Abatacept doesn’t appear to increase the risk of opportunistic infections among patients with rheumatoid arthritis, Kevin Winthrop, MD, reported at the European Congress of Rheumatology.

After reviewing all of the extant safety data on the drug – all of its clinical trial and open-label study data, and case reports of abatacept-associated adverse events – Dr. Winthrop concluded that infections, including tuberculosis, fungal overgrowth, herpes simplex and herpes zoster, occur either with similar frequency or less often than among those taking placebo.

“In fact, there is a sense that abatacept is actually safer,” than some other disease-modifying antirheumatic drugs,” said Dr. Winthrop, an infectious disease specialist at Oregon Health and Science University, Portland. However, there are few data comparing safety among the agents – something he said should be examined in more detail.

His review encompassed 16 clinical trials comprising 7,044 patients who took the drug (21,330 patient/years of abatacept exposure) and 1,485 patients who took placebo. He conducted two analyses: one for opportunistic bacterial and fungal infections, and one for herpes simplex and herpes zoster.

The first analysis found 45 opportunistic bacterial or fungal infections among those taking abatacept – an incidence rate of 0.21/ 100 person-years. There were seven such infections in the placebo group – an incidence rate of 0.56/100 person-years. This difference was statistically significant.

In the abatacept cohort, there were two cases of bronchopulmonary aspergilliosis (IR 0.01) and three fungal eye infections (IR 0.01). There was also one case of gastrointestinal candidiasis; one fungal esophagitis; one cryptococcal meningitis; two pneumonias (one pseudomonal and one caused by Pneumocystis jirovecii); and two cases of respiratory monoliasis. All of these infections had an incidence rate of less than 0.01/100 person-years.

There were 17 tuberculosis cases (IR 0.08/100 person-years). Three cases were latent. Six of the cases were pulmonary and five were extrapulmonary. Two cases were unspecified. All occurred in regions with high or moderate endemic tuberculosis levels.

A meta-regression analysis examined the risk of opportunistic infections in the patients taken from the placebo-controlled clinical trials only (2,653 abatacept, 1,485 placebo). The estimated frequency of an opportunistic infection was 0.15% among those taking the drug and 0.48% among those taking placebo.

The herpes analysis examined the placebo-controlled clinical trial population as well. There were 57 cases of herpes simplex (IR 2.5/100 person-years) among those taking abatacept and 22 among those taking placebo (IR 1.8/100 person-years). The difference was not statistically significant.

There were 44 cases of herpes zoster among those taking abatacept (IR 1.9/100 person-years) and 21 among those taking placebo (IR 1.7/100 person-years).

“Basically, I think what we’re seeing here is a whole lot of nothing,” Dr. Winthrop said.

Dr. Winthrop has been a consultant for Pfizer, AbbVie, Bristol-Myers Squibb, UCB Pharma, Roche/Genentech, Amgen, Galapagos, and Eli Lilly.

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– Abatacept doesn’t appear to increase the risk of opportunistic infections among patients with rheumatoid arthritis, Kevin Winthrop, MD, reported at the European Congress of Rheumatology.

After reviewing all of the extant safety data on the drug – all of its clinical trial and open-label study data, and case reports of abatacept-associated adverse events – Dr. Winthrop concluded that infections, including tuberculosis, fungal overgrowth, herpes simplex and herpes zoster, occur either with similar frequency or less often than among those taking placebo.

“In fact, there is a sense that abatacept is actually safer,” than some other disease-modifying antirheumatic drugs,” said Dr. Winthrop, an infectious disease specialist at Oregon Health and Science University, Portland. However, there are few data comparing safety among the agents – something he said should be examined in more detail.

His review encompassed 16 clinical trials comprising 7,044 patients who took the drug (21,330 patient/years of abatacept exposure) and 1,485 patients who took placebo. He conducted two analyses: one for opportunistic bacterial and fungal infections, and one for herpes simplex and herpes zoster.

The first analysis found 45 opportunistic bacterial or fungal infections among those taking abatacept – an incidence rate of 0.21/ 100 person-years. There were seven such infections in the placebo group – an incidence rate of 0.56/100 person-years. This difference was statistically significant.

In the abatacept cohort, there were two cases of bronchopulmonary aspergilliosis (IR 0.01) and three fungal eye infections (IR 0.01). There was also one case of gastrointestinal candidiasis; one fungal esophagitis; one cryptococcal meningitis; two pneumonias (one pseudomonal and one caused by Pneumocystis jirovecii); and two cases of respiratory monoliasis. All of these infections had an incidence rate of less than 0.01/100 person-years.

There were 17 tuberculosis cases (IR 0.08/100 person-years). Three cases were latent. Six of the cases were pulmonary and five were extrapulmonary. Two cases were unspecified. All occurred in regions with high or moderate endemic tuberculosis levels.

A meta-regression analysis examined the risk of opportunistic infections in the patients taken from the placebo-controlled clinical trials only (2,653 abatacept, 1,485 placebo). The estimated frequency of an opportunistic infection was 0.15% among those taking the drug and 0.48% among those taking placebo.

The herpes analysis examined the placebo-controlled clinical trial population as well. There were 57 cases of herpes simplex (IR 2.5/100 person-years) among those taking abatacept and 22 among those taking placebo (IR 1.8/100 person-years). The difference was not statistically significant.

There were 44 cases of herpes zoster among those taking abatacept (IR 1.9/100 person-years) and 21 among those taking placebo (IR 1.7/100 person-years).

“Basically, I think what we’re seeing here is a whole lot of nothing,” Dr. Winthrop said.

Dr. Winthrop has been a consultant for Pfizer, AbbVie, Bristol-Myers Squibb, UCB Pharma, Roche/Genentech, Amgen, Galapagos, and Eli Lilly.

 

– Abatacept doesn’t appear to increase the risk of opportunistic infections among patients with rheumatoid arthritis, Kevin Winthrop, MD, reported at the European Congress of Rheumatology.

After reviewing all of the extant safety data on the drug – all of its clinical trial and open-label study data, and case reports of abatacept-associated adverse events – Dr. Winthrop concluded that infections, including tuberculosis, fungal overgrowth, herpes simplex and herpes zoster, occur either with similar frequency or less often than among those taking placebo.

“In fact, there is a sense that abatacept is actually safer,” than some other disease-modifying antirheumatic drugs,” said Dr. Winthrop, an infectious disease specialist at Oregon Health and Science University, Portland. However, there are few data comparing safety among the agents – something he said should be examined in more detail.

His review encompassed 16 clinical trials comprising 7,044 patients who took the drug (21,330 patient/years of abatacept exposure) and 1,485 patients who took placebo. He conducted two analyses: one for opportunistic bacterial and fungal infections, and one for herpes simplex and herpes zoster.

The first analysis found 45 opportunistic bacterial or fungal infections among those taking abatacept – an incidence rate of 0.21/ 100 person-years. There were seven such infections in the placebo group – an incidence rate of 0.56/100 person-years. This difference was statistically significant.

In the abatacept cohort, there were two cases of bronchopulmonary aspergilliosis (IR 0.01) and three fungal eye infections (IR 0.01). There was also one case of gastrointestinal candidiasis; one fungal esophagitis; one cryptococcal meningitis; two pneumonias (one pseudomonal and one caused by Pneumocystis jirovecii); and two cases of respiratory monoliasis. All of these infections had an incidence rate of less than 0.01/100 person-years.

There were 17 tuberculosis cases (IR 0.08/100 person-years). Three cases were latent. Six of the cases were pulmonary and five were extrapulmonary. Two cases were unspecified. All occurred in regions with high or moderate endemic tuberculosis levels.

A meta-regression analysis examined the risk of opportunistic infections in the patients taken from the placebo-controlled clinical trials only (2,653 abatacept, 1,485 placebo). The estimated frequency of an opportunistic infection was 0.15% among those taking the drug and 0.48% among those taking placebo.

The herpes analysis examined the placebo-controlled clinical trial population as well. There were 57 cases of herpes simplex (IR 2.5/100 person-years) among those taking abatacept and 22 among those taking placebo (IR 1.8/100 person-years). The difference was not statistically significant.

There were 44 cases of herpes zoster among those taking abatacept (IR 1.9/100 person-years) and 21 among those taking placebo (IR 1.7/100 person-years).

“Basically, I think what we’re seeing here is a whole lot of nothing,” Dr. Winthrop said.

Dr. Winthrop has been a consultant for Pfizer, AbbVie, Bristol-Myers Squibb, UCB Pharma, Roche/Genentech, Amgen, Galapagos, and Eli Lilly.

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Key clinical point: Abatacept doesn’t appear to increase the risk of opportunistic infections in patients with rheumatoid arthritis.

Major finding: The overall incidence rate for opportunistic infection was 0.21/100 person-years for abatacept and 0.56 for placebo.

Data source: The review comprised 7,044 who took abatacept and 1,485 who took placebo.

Disclosures: Dr. Winthrop has been a consultant for Pfizer, AbbVie, Bristol-Myers Squibb, UCB Pharma, Roche/Genentech, Amgen, Galapagos, and Eli Lilly.

Midostaurin improves survival in new AML

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Fri, 01/04/2019 - 10:05

 

Adding the multitargeted kinase inhibitor midostaurin to standard chemotherapy led to significantly longer overall and event-free survival, compared with placebo and standard chemotherapy in newly diagnosed acute myeloid leukemia (AML) patients with FLT3 gene mutations, according to phase III trial results published in the New England Journal of Medicine.*

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Adding the multitargeted kinase inhibitor midostaurin to standard chemotherapy led to significantly longer overall and event-free survival, compared with placebo and standard chemotherapy in newly diagnosed acute myeloid leukemia (AML) patients with FLT3 gene mutations, according to phase III trial results published in the New England Journal of Medicine.*

 

Adding the multitargeted kinase inhibitor midostaurin to standard chemotherapy led to significantly longer overall and event-free survival, compared with placebo and standard chemotherapy in newly diagnosed acute myeloid leukemia (AML) patients with FLT3 gene mutations, according to phase III trial results published in the New England Journal of Medicine.*

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Key clinical point: Multitargeted kinase inhibitor midostaurin combined with standard chemotherapy improved survival in newly diagnosed acute myeloid leukemia patients.

Major finding: The 4-year overall survival rate was 51.4% for the midostaurin group and 44.3% for the placebo group. Midostaurin was shown to benefit all mutation subgroups — internal tandem mutations and point mutations in the tyrosine kinase domain – but with no greater benefit in one group than another.

Data source: A multicenter, multinational, randomized, double-blind, placebo-controlled trial.

Disclosures: The trial was funded by the National Cancer Institute and Novartis. Researchers reported receiving personal fees from Novartis and other companies.

Ibrutinib dons new anti-GVHD hat

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Fri, 01/04/2019 - 10:05

 

– Talk about versatility: Ibrutinib (Imbruvica), a drug with marked activity against B-cell malignancies, also appears to be a safe and acceptable option for the treatment of patients with chronic graft vs. host disease (cGVHD) for whom frontline therapies have failed.

Among 42 patients in a phase II study with steroid-refractory cGVHD, the overall response rate with ibrutinib was 67%, with one-third of responders having a complete response, reported Iskra Pusic, MD, from Washington University School of Medicine in St. Louis.

Neil Osterweil/Frontline Medical News
Dr. Iskra Pusic
“Ibrutinib resulted in clinically meaningful and sustained responses in patients who have failed at least one prior treatment. They were able to taper steroids, and it’s important to underline here that we saw responses even in the setting of tapering steroids,” she said at a briefing at the annual congress of the European Hematology Association.

Corticosteroids are the most commonly used therapy for cGVHD in the United States, but for those patients for whom corticosteroids are a bust, there is no established second-line therapy, and patients with refractory cGVHD are usually recommended for clinical trials, Dr. Pusic said.

The therapeutic rationale underpinning the use of ibrutinib in cGVHD, a condition marked by extensive immune dysregulation, is that the agent is an irreversible inhibitor of Bruton’s tyrosine kinase and interleukin-2 inducible T-cell kinase, and thus has wide-ranging immune-dampening activity, Dr. Pusic said.

She and colleagues in a multicenter study enrolled 42 patients with cGVHD that corticosteroids had failed to treat adequately, and treated them with oral ibrutinib 420 mg daily until cGVHD progression or unacceptable toxicity.

At a median follow-up of 13.9 months, a total of 28 patients (67%) had a response according to 2005 National Institutes of Health (NIH) criteria, including nine with a complete response, and 19 with partial responses.

Of the patients with responses, 79% had a response at the time of the first assessment for response, and 71% of responders had responses lasting at least 5 months.

Among patients with multiorgan involvement, responses were seen in two or more organs.

Grade 3 or greater adverse events included fatigue, diarrhea, muscles spasms, pneumonia, pyrexia, and headache. Two patients died on study, one from multilobular pneumonia and one from bronchopulmonary aspergillosis.

In general, the safety profile of ibrutinib was similar to that seen in studies of the drug in B-cell malignancies and to that seen with corticosteroid therapy for patients with cGVHD, Dr. Pusic said.

Investigators are currently enrolling patients in a double-blind clinical trial comparing ibrutinib or placebo in combination with corticosteroids in patients with newly diagnosed cGVHD, she noted.

The study was supported by Pharmacyclics. Dr. Pusic did not report disclosures.

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– Talk about versatility: Ibrutinib (Imbruvica), a drug with marked activity against B-cell malignancies, also appears to be a safe and acceptable option for the treatment of patients with chronic graft vs. host disease (cGVHD) for whom frontline therapies have failed.

Among 42 patients in a phase II study with steroid-refractory cGVHD, the overall response rate with ibrutinib was 67%, with one-third of responders having a complete response, reported Iskra Pusic, MD, from Washington University School of Medicine in St. Louis.

Neil Osterweil/Frontline Medical News
Dr. Iskra Pusic
“Ibrutinib resulted in clinically meaningful and sustained responses in patients who have failed at least one prior treatment. They were able to taper steroids, and it’s important to underline here that we saw responses even in the setting of tapering steroids,” she said at a briefing at the annual congress of the European Hematology Association.

Corticosteroids are the most commonly used therapy for cGVHD in the United States, but for those patients for whom corticosteroids are a bust, there is no established second-line therapy, and patients with refractory cGVHD are usually recommended for clinical trials, Dr. Pusic said.

The therapeutic rationale underpinning the use of ibrutinib in cGVHD, a condition marked by extensive immune dysregulation, is that the agent is an irreversible inhibitor of Bruton’s tyrosine kinase and interleukin-2 inducible T-cell kinase, and thus has wide-ranging immune-dampening activity, Dr. Pusic said.

She and colleagues in a multicenter study enrolled 42 patients with cGVHD that corticosteroids had failed to treat adequately, and treated them with oral ibrutinib 420 mg daily until cGVHD progression or unacceptable toxicity.

At a median follow-up of 13.9 months, a total of 28 patients (67%) had a response according to 2005 National Institutes of Health (NIH) criteria, including nine with a complete response, and 19 with partial responses.

Of the patients with responses, 79% had a response at the time of the first assessment for response, and 71% of responders had responses lasting at least 5 months.

Among patients with multiorgan involvement, responses were seen in two or more organs.

Grade 3 or greater adverse events included fatigue, diarrhea, muscles spasms, pneumonia, pyrexia, and headache. Two patients died on study, one from multilobular pneumonia and one from bronchopulmonary aspergillosis.

In general, the safety profile of ibrutinib was similar to that seen in studies of the drug in B-cell malignancies and to that seen with corticosteroid therapy for patients with cGVHD, Dr. Pusic said.

Investigators are currently enrolling patients in a double-blind clinical trial comparing ibrutinib or placebo in combination with corticosteroids in patients with newly diagnosed cGVHD, she noted.

The study was supported by Pharmacyclics. Dr. Pusic did not report disclosures.

 

– Talk about versatility: Ibrutinib (Imbruvica), a drug with marked activity against B-cell malignancies, also appears to be a safe and acceptable option for the treatment of patients with chronic graft vs. host disease (cGVHD) for whom frontline therapies have failed.

Among 42 patients in a phase II study with steroid-refractory cGVHD, the overall response rate with ibrutinib was 67%, with one-third of responders having a complete response, reported Iskra Pusic, MD, from Washington University School of Medicine in St. Louis.

Neil Osterweil/Frontline Medical News
Dr. Iskra Pusic
“Ibrutinib resulted in clinically meaningful and sustained responses in patients who have failed at least one prior treatment. They were able to taper steroids, and it’s important to underline here that we saw responses even in the setting of tapering steroids,” she said at a briefing at the annual congress of the European Hematology Association.

Corticosteroids are the most commonly used therapy for cGVHD in the United States, but for those patients for whom corticosteroids are a bust, there is no established second-line therapy, and patients with refractory cGVHD are usually recommended for clinical trials, Dr. Pusic said.

The therapeutic rationale underpinning the use of ibrutinib in cGVHD, a condition marked by extensive immune dysregulation, is that the agent is an irreversible inhibitor of Bruton’s tyrosine kinase and interleukin-2 inducible T-cell kinase, and thus has wide-ranging immune-dampening activity, Dr. Pusic said.

She and colleagues in a multicenter study enrolled 42 patients with cGVHD that corticosteroids had failed to treat adequately, and treated them with oral ibrutinib 420 mg daily until cGVHD progression or unacceptable toxicity.

At a median follow-up of 13.9 months, a total of 28 patients (67%) had a response according to 2005 National Institutes of Health (NIH) criteria, including nine with a complete response, and 19 with partial responses.

Of the patients with responses, 79% had a response at the time of the first assessment for response, and 71% of responders had responses lasting at least 5 months.

Among patients with multiorgan involvement, responses were seen in two or more organs.

Grade 3 or greater adverse events included fatigue, diarrhea, muscles spasms, pneumonia, pyrexia, and headache. Two patients died on study, one from multilobular pneumonia and one from bronchopulmonary aspergillosis.

In general, the safety profile of ibrutinib was similar to that seen in studies of the drug in B-cell malignancies and to that seen with corticosteroid therapy for patients with cGVHD, Dr. Pusic said.

Investigators are currently enrolling patients in a double-blind clinical trial comparing ibrutinib or placebo in combination with corticosteroids in patients with newly diagnosed cGVHD, she noted.

The study was supported by Pharmacyclics. Dr. Pusic did not report disclosures.

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Key clinical point: The tyrosine kinase inhibitor ibrutinib was associated with complete and partial responses in two-thirds of patients with steroid-refractory chronic graft vs. host disease (cGVHD).

Major finding: A total of 28 patients (67%) had responses, including 9 complete responses.

Data source: Phase II clinical trial in 42 patients with cGVHD for whom corticosteroids had failed.

Disclosures: The study was supported by Pharmacyclics. Dr. Pusic did not report disclosures.

Apremilast eases PsA symptoms in patients who are naive to biologics

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Tue, 02/07/2023 - 16:57

 

– Aprelimast rapidly improved symptoms for patients with active psoriatic arthritis who were naive to biologics, whether or not they were on background methotrexate.

Response to the phosphodiesterase 4-inhibitor also increased with time, Peter Nash, MD, said at the European Congress of Rheumatology. By 2 weeks, 16% had achieved an ACR20 response. By 24 weeks, that had risen to 43%, and at 52 weeks, was 67%. Many patients responded even better, with 37% achieving an ACR50 response and 21% and ACR70 response by the end of the phase III placebo-controlled trial, said Dr. Nash of the University of Queensland, Brisbane, Australia.

Michele G Sullivan/Frontline Medical News
Dr. Peter Nash
The ACTIVE study was 52 weeks long, and is being followed by an open-label extension. Dr. Nash reported mostly 24-week data, with some preliminary 52-week data for patients who had been on the study drug the entire period.

ACTIVE randomized 229 patients with active psoriatic arthritis (PsA) to either placebo or 30 mg apremilast twice daily. The primary endpoint was ACR20 response at week 16. At that time, patients who had not improved by at least 10% were offered early escape into active therapy.

Patients were a mean of 49 years old, with mean disease duration of 4 years. This is considerably shorter than the duration seen in many PsA trials, Dr. Nash said. It was a reflection of the study requirement that patients have taken no more than one synthetic disease-modifying antirheumatic agent (sDMARD) and no biologics for their disease.

The active and placebo groups separated very early in this study, with 16% of the apremilast group achieving an ACR 20 response by 2 weeks compared to 6% taking placebo. The response curves remained significantly separated throughout the entire study. By the 16-week endpoint, 38% of the active group and 20% of the placebo group had achieved ACR20. At this point, 11 of those taking apremilast asked for early escape and went on open-label apremilast at the same dose; 35 taking placebo were switched to open-label apremilast.

By 24 weeks, the ACR20 responses were 44% in the apremilast group and 25% in the placebo group. That response rate continued to rise over the year of treatment. By week 52, 67% of patients who had been on the study drug since the beginning had an ACR20, 37% an ACR50, and 21% an ACR70 response. ACR response was just as good in patients who were taking background methotrexate as those who were not, Dr. Nash said.

Compared to placebo, apremilast was associated with significantly more improvement on the Disease Activity Score-28 (CRP). Again, the response curves separated significantly by 2 weeks (–0.59 apremilast vs. –0.31 placebo) and continued to separate at 16 weeks (–1.07 vs. –0.39), and 24 weeks (–1.26 vs. –0.76). At 52 weeks, among those who had been initially randomized to apremilast, the mean DAS-28 (CRP) score had changed –1.71 from baseline.

The drug also significantly improved enthesitis relative to placebo, with rapid onset of action that continued to improve by week 24. The adverse event profile was good, Dr. Nash said. There were no opportunistic infections and no reactivations of tuberculosis. Ten in the active group and five in the placebo group withdrew due to an adverse event. Diarrhea and headache were the most common issues. Diarrhea occurred in 11% of the placebo group and 15% of the apremilast group; headache in 4% of the placebo group and 7% of the apremilast group. These were more common in the beginning of the study and tended to resolve with time, Dr. Nash said.

Thirty patients in the study had a history of depression and of these, two had a depression flare that lead to withdrawal from the study. Weight loss of at least 10% occurred in 5% of those taking apremilast.

Celgene sponsored the study. Dr. Nash has received research support from the company.

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– Aprelimast rapidly improved symptoms for patients with active psoriatic arthritis who were naive to biologics, whether or not they were on background methotrexate.

Response to the phosphodiesterase 4-inhibitor also increased with time, Peter Nash, MD, said at the European Congress of Rheumatology. By 2 weeks, 16% had achieved an ACR20 response. By 24 weeks, that had risen to 43%, and at 52 weeks, was 67%. Many patients responded even better, with 37% achieving an ACR50 response and 21% and ACR70 response by the end of the phase III placebo-controlled trial, said Dr. Nash of the University of Queensland, Brisbane, Australia.

Michele G Sullivan/Frontline Medical News
Dr. Peter Nash
The ACTIVE study was 52 weeks long, and is being followed by an open-label extension. Dr. Nash reported mostly 24-week data, with some preliminary 52-week data for patients who had been on the study drug the entire period.

ACTIVE randomized 229 patients with active psoriatic arthritis (PsA) to either placebo or 30 mg apremilast twice daily. The primary endpoint was ACR20 response at week 16. At that time, patients who had not improved by at least 10% were offered early escape into active therapy.

Patients were a mean of 49 years old, with mean disease duration of 4 years. This is considerably shorter than the duration seen in many PsA trials, Dr. Nash said. It was a reflection of the study requirement that patients have taken no more than one synthetic disease-modifying antirheumatic agent (sDMARD) and no biologics for their disease.

The active and placebo groups separated very early in this study, with 16% of the apremilast group achieving an ACR 20 response by 2 weeks compared to 6% taking placebo. The response curves remained significantly separated throughout the entire study. By the 16-week endpoint, 38% of the active group and 20% of the placebo group had achieved ACR20. At this point, 11 of those taking apremilast asked for early escape and went on open-label apremilast at the same dose; 35 taking placebo were switched to open-label apremilast.

By 24 weeks, the ACR20 responses were 44% in the apremilast group and 25% in the placebo group. That response rate continued to rise over the year of treatment. By week 52, 67% of patients who had been on the study drug since the beginning had an ACR20, 37% an ACR50, and 21% an ACR70 response. ACR response was just as good in patients who were taking background methotrexate as those who were not, Dr. Nash said.

Compared to placebo, apremilast was associated with significantly more improvement on the Disease Activity Score-28 (CRP). Again, the response curves separated significantly by 2 weeks (–0.59 apremilast vs. –0.31 placebo) and continued to separate at 16 weeks (–1.07 vs. –0.39), and 24 weeks (–1.26 vs. –0.76). At 52 weeks, among those who had been initially randomized to apremilast, the mean DAS-28 (CRP) score had changed –1.71 from baseline.

The drug also significantly improved enthesitis relative to placebo, with rapid onset of action that continued to improve by week 24. The adverse event profile was good, Dr. Nash said. There were no opportunistic infections and no reactivations of tuberculosis. Ten in the active group and five in the placebo group withdrew due to an adverse event. Diarrhea and headache were the most common issues. Diarrhea occurred in 11% of the placebo group and 15% of the apremilast group; headache in 4% of the placebo group and 7% of the apremilast group. These were more common in the beginning of the study and tended to resolve with time, Dr. Nash said.

Thirty patients in the study had a history of depression and of these, two had a depression flare that lead to withdrawal from the study. Weight loss of at least 10% occurred in 5% of those taking apremilast.

Celgene sponsored the study. Dr. Nash has received research support from the company.

 

– Aprelimast rapidly improved symptoms for patients with active psoriatic arthritis who were naive to biologics, whether or not they were on background methotrexate.

Response to the phosphodiesterase 4-inhibitor also increased with time, Peter Nash, MD, said at the European Congress of Rheumatology. By 2 weeks, 16% had achieved an ACR20 response. By 24 weeks, that had risen to 43%, and at 52 weeks, was 67%. Many patients responded even better, with 37% achieving an ACR50 response and 21% and ACR70 response by the end of the phase III placebo-controlled trial, said Dr. Nash of the University of Queensland, Brisbane, Australia.

Michele G Sullivan/Frontline Medical News
Dr. Peter Nash
The ACTIVE study was 52 weeks long, and is being followed by an open-label extension. Dr. Nash reported mostly 24-week data, with some preliminary 52-week data for patients who had been on the study drug the entire period.

ACTIVE randomized 229 patients with active psoriatic arthritis (PsA) to either placebo or 30 mg apremilast twice daily. The primary endpoint was ACR20 response at week 16. At that time, patients who had not improved by at least 10% were offered early escape into active therapy.

Patients were a mean of 49 years old, with mean disease duration of 4 years. This is considerably shorter than the duration seen in many PsA trials, Dr. Nash said. It was a reflection of the study requirement that patients have taken no more than one synthetic disease-modifying antirheumatic agent (sDMARD) and no biologics for their disease.

The active and placebo groups separated very early in this study, with 16% of the apremilast group achieving an ACR 20 response by 2 weeks compared to 6% taking placebo. The response curves remained significantly separated throughout the entire study. By the 16-week endpoint, 38% of the active group and 20% of the placebo group had achieved ACR20. At this point, 11 of those taking apremilast asked for early escape and went on open-label apremilast at the same dose; 35 taking placebo were switched to open-label apremilast.

By 24 weeks, the ACR20 responses were 44% in the apremilast group and 25% in the placebo group. That response rate continued to rise over the year of treatment. By week 52, 67% of patients who had been on the study drug since the beginning had an ACR20, 37% an ACR50, and 21% an ACR70 response. ACR response was just as good in patients who were taking background methotrexate as those who were not, Dr. Nash said.

Compared to placebo, apremilast was associated with significantly more improvement on the Disease Activity Score-28 (CRP). Again, the response curves separated significantly by 2 weeks (–0.59 apremilast vs. –0.31 placebo) and continued to separate at 16 weeks (–1.07 vs. –0.39), and 24 weeks (–1.26 vs. –0.76). At 52 weeks, among those who had been initially randomized to apremilast, the mean DAS-28 (CRP) score had changed –1.71 from baseline.

The drug also significantly improved enthesitis relative to placebo, with rapid onset of action that continued to improve by week 24. The adverse event profile was good, Dr. Nash said. There were no opportunistic infections and no reactivations of tuberculosis. Ten in the active group and five in the placebo group withdrew due to an adverse event. Diarrhea and headache were the most common issues. Diarrhea occurred in 11% of the placebo group and 15% of the apremilast group; headache in 4% of the placebo group and 7% of the apremilast group. These were more common in the beginning of the study and tended to resolve with time, Dr. Nash said.

Thirty patients in the study had a history of depression and of these, two had a depression flare that lead to withdrawal from the study. Weight loss of at least 10% occurred in 5% of those taking apremilast.

Celgene sponsored the study. Dr. Nash has received research support from the company.

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Key clinical point: . Apremilast improved symptoms of psoriatic arthritis in patients who were naive to biologics.

Major finding: By the 16-week endpoint, 38% of the active group and 20% of the placebo group had achieved ACR20.

Data source: The phase IIIb study randomized 229 patients to apremilast or placebo.

Disclosures: Celgene sponsored the trial. Dr. Nash has received research support from the company.

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Consider intraperitoneal ropivacaine for colectomy ERAS

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Wed, 01/02/2019 - 09:54

 

– Intraperitoneal ropivacaine decreases postoperative pain and improves functional recovery after laparoscopic colectomy, according to randomized, blinded trial from the Royal Adelaide (Australia) Hospital.

“We recommend routine inclusion of IPLA [intraperitoneal local anesthetic] in the multimodal analgesia component of ERAS [enhanced-recovery-after-surgery] programs for laparoscopic colectomy,” the investigators concluded.

Dr. Mark Lewis
IPLA has been demonstrated before to reduce postoperative pain and nausea following open colectomy. “We wanted to determine the effect in our everyday practice following laparoscopic bowel resection,” senior investigator Mark Lewis, MBBS, a consultant colorectal surgeon at the hospital, said at the American Society of Colon and Rectal surgeons annual meeting (Ann Surg. 2011 Jul;254[1]:28-38). The subjects were adults undergoing elective procedures; 26 were randomized to instillation of a 100 mg intraperitoneal ropivacaine solution throughout the abdomen – both before dissection and prior to abdominal closure – and a continuous postoperative infusion of 20 mg/hour for 48 hours, delivered to the operative region of greatest dissection; 25 were randomized to a normal saline equivalent.

Recovery was smoother in the ropivacaine group. On a 90-point surgical recovery scale assessing fatigue, mental function, and the ability to do normal daily activities, ropivacaine patients were a few points ahead on days 1 and 3; the gap widened to about 10 points on days 7, 30, and 45. Ropivacaine might have helped reduced inflammation, accounting for the extended benefit, Dr. Lewis said.

Pain control was better with ropivacaine, as well. Ropivacaine patients were about 15-20 points lower on 50-point scales assessing both visceral and abdominal pain at postop hours 3 and 24, and day 7. The findings were statistically significant.

Several trends also favored ropivacaine. Ropivacaine patients had their first bowel movement at around 70 hours postop, versus about 82 hours in the control group. They were also discharged almost a day sooner, and had less postop vomiting. Just one patient in the ropivacaine group was diagnosed with ileus, versus four in the control arm.

There was also a trend for less opioid use in the ropivacaine group, which Dr. Lewis suspected would have been statistically significant if the trial had more patients.

Ropivacaine patients were a mean of 67 years old, versus 62 years old in the control group. There were slightly more men than women in each arm. The mean body mass index in the ropivacaine group was 28.5 kg/m2, and in the control group 26.4 kg/m2. Ropivacaine was discontinued in two patients due to possible toxicity.

An audience member noted that intravenous lidocaine has shown similar benefits in abdominal surgery.

The investigators had no disclosures.
 

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– Intraperitoneal ropivacaine decreases postoperative pain and improves functional recovery after laparoscopic colectomy, according to randomized, blinded trial from the Royal Adelaide (Australia) Hospital.

“We recommend routine inclusion of IPLA [intraperitoneal local anesthetic] in the multimodal analgesia component of ERAS [enhanced-recovery-after-surgery] programs for laparoscopic colectomy,” the investigators concluded.

Dr. Mark Lewis
IPLA has been demonstrated before to reduce postoperative pain and nausea following open colectomy. “We wanted to determine the effect in our everyday practice following laparoscopic bowel resection,” senior investigator Mark Lewis, MBBS, a consultant colorectal surgeon at the hospital, said at the American Society of Colon and Rectal surgeons annual meeting (Ann Surg. 2011 Jul;254[1]:28-38). The subjects were adults undergoing elective procedures; 26 were randomized to instillation of a 100 mg intraperitoneal ropivacaine solution throughout the abdomen – both before dissection and prior to abdominal closure – and a continuous postoperative infusion of 20 mg/hour for 48 hours, delivered to the operative region of greatest dissection; 25 were randomized to a normal saline equivalent.

Recovery was smoother in the ropivacaine group. On a 90-point surgical recovery scale assessing fatigue, mental function, and the ability to do normal daily activities, ropivacaine patients were a few points ahead on days 1 and 3; the gap widened to about 10 points on days 7, 30, and 45. Ropivacaine might have helped reduced inflammation, accounting for the extended benefit, Dr. Lewis said.

Pain control was better with ropivacaine, as well. Ropivacaine patients were about 15-20 points lower on 50-point scales assessing both visceral and abdominal pain at postop hours 3 and 24, and day 7. The findings were statistically significant.

Several trends also favored ropivacaine. Ropivacaine patients had their first bowel movement at around 70 hours postop, versus about 82 hours in the control group. They were also discharged almost a day sooner, and had less postop vomiting. Just one patient in the ropivacaine group was diagnosed with ileus, versus four in the control arm.

There was also a trend for less opioid use in the ropivacaine group, which Dr. Lewis suspected would have been statistically significant if the trial had more patients.

Ropivacaine patients were a mean of 67 years old, versus 62 years old in the control group. There were slightly more men than women in each arm. The mean body mass index in the ropivacaine group was 28.5 kg/m2, and in the control group 26.4 kg/m2. Ropivacaine was discontinued in two patients due to possible toxicity.

An audience member noted that intravenous lidocaine has shown similar benefits in abdominal surgery.

The investigators had no disclosures.
 

 

– Intraperitoneal ropivacaine decreases postoperative pain and improves functional recovery after laparoscopic colectomy, according to randomized, blinded trial from the Royal Adelaide (Australia) Hospital.

“We recommend routine inclusion of IPLA [intraperitoneal local anesthetic] in the multimodal analgesia component of ERAS [enhanced-recovery-after-surgery] programs for laparoscopic colectomy,” the investigators concluded.

Dr. Mark Lewis
IPLA has been demonstrated before to reduce postoperative pain and nausea following open colectomy. “We wanted to determine the effect in our everyday practice following laparoscopic bowel resection,” senior investigator Mark Lewis, MBBS, a consultant colorectal surgeon at the hospital, said at the American Society of Colon and Rectal surgeons annual meeting (Ann Surg. 2011 Jul;254[1]:28-38). The subjects were adults undergoing elective procedures; 26 were randomized to instillation of a 100 mg intraperitoneal ropivacaine solution throughout the abdomen – both before dissection and prior to abdominal closure – and a continuous postoperative infusion of 20 mg/hour for 48 hours, delivered to the operative region of greatest dissection; 25 were randomized to a normal saline equivalent.

Recovery was smoother in the ropivacaine group. On a 90-point surgical recovery scale assessing fatigue, mental function, and the ability to do normal daily activities, ropivacaine patients were a few points ahead on days 1 and 3; the gap widened to about 10 points on days 7, 30, and 45. Ropivacaine might have helped reduced inflammation, accounting for the extended benefit, Dr. Lewis said.

Pain control was better with ropivacaine, as well. Ropivacaine patients were about 15-20 points lower on 50-point scales assessing both visceral and abdominal pain at postop hours 3 and 24, and day 7. The findings were statistically significant.

Several trends also favored ropivacaine. Ropivacaine patients had their first bowel movement at around 70 hours postop, versus about 82 hours in the control group. They were also discharged almost a day sooner, and had less postop vomiting. Just one patient in the ropivacaine group was diagnosed with ileus, versus four in the control arm.

There was also a trend for less opioid use in the ropivacaine group, which Dr. Lewis suspected would have been statistically significant if the trial had more patients.

Ropivacaine patients were a mean of 67 years old, versus 62 years old in the control group. There were slightly more men than women in each arm. The mean body mass index in the ropivacaine group was 28.5 kg/m2, and in the control group 26.4 kg/m2. Ropivacaine was discontinued in two patients due to possible toxicity.

An audience member noted that intravenous lidocaine has shown similar benefits in abdominal surgery.

The investigators had no disclosures.
 

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Key clinical point: Intraperitoneal ropivacaine decreases postoperative pain and improves functional recovery after laparoscopic colectomy.

Major finding: On a 90-point surgical recovery scale assessing fatigue, mental function, and the ability to do normal daily activities, ropivacaine patients were a few points ahead of saline controls on postop days 1 and 3; the gap widened to about 10 points on days 7, 30, and 45.

Data source: Randomized, blinded trial with 51 patients

Disclosures: The investigators had no disclosures.