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Delaying cancer treatment for fertility preservation did not affect outcomes
SALT LAKE CITY – Delaying cancer treatment to allow women to undergo fertility preservation did not affect long-term cancer outcomes, suggest the findings from a retrospective study of more than 500 patients.
Over a median of 3.7 years of follow-up, 2.3% of patients who elected fertility preservation developed recurrent cancer, compared with 5.3% of patients who did not undergo fertility preservation (P = .09), according to Molly Moravek, MD, of the University of Michigan, Ann Arbor, and her associates.
Survival rates were 97.7% for patients who underwent fertility preservation and 94.1% for those who did not (P = .05), the investigators reported in a poster at the annual meeting of the American Society for Reproductive Medicine.
“Pursuing fertility preservation results in minimal delays to initiation of cancer treatment and is unlikely to be clinically significant,” the investigators wrote. “There is no evidence of increased recurrence or mortality in fertility preservation patients versus controls, suggesting fertility preservation is safe for eligible cancer patients.”
Progress in cancer detection and survival has sharpened the focus on quality of life issues, including fertility preservation, the researchers said. But oncologists and patients themselves have raised concerns about postponing cancer treatment for this reason, and some have recommended shortening the delay by triggering ovarian stimulation regardless of the phase of the menstrual cycle – known as the “random start” protocol.
To explore these issues, the researchers reviewed the charts of all 553 cancer patients who had used the online patient navigator for fertility preservation at Northwestern University from 2006 to 2015.
A total of 213 patients pursued fertility preservation, while 340 did not. Undergoing fertility preservation postponed treatment of breast, hematologic, gynecologic, and other cancers by an average of 10 days, but this delay did not translate to worse recurrence rates or mortality, either overall or for any cancer subtype.
Cycle outcomes were similar between the 117 patients who underwent random-start protocols and the 23 patients underwent cycle-specific protocols, the investigators reported. Both protocols were associated with similar numbers of oocytes retrieved, numbers of mature oocytes, peak serum estradiol levels, days of stimulation, and times to cancer treatment.
The Northwestern Memorial Foundation supported the work. Dr. Moravek reported having no relevant financial disclosures.
SALT LAKE CITY – Delaying cancer treatment to allow women to undergo fertility preservation did not affect long-term cancer outcomes, suggest the findings from a retrospective study of more than 500 patients.
Over a median of 3.7 years of follow-up, 2.3% of patients who elected fertility preservation developed recurrent cancer, compared with 5.3% of patients who did not undergo fertility preservation (P = .09), according to Molly Moravek, MD, of the University of Michigan, Ann Arbor, and her associates.
Survival rates were 97.7% for patients who underwent fertility preservation and 94.1% for those who did not (P = .05), the investigators reported in a poster at the annual meeting of the American Society for Reproductive Medicine.
“Pursuing fertility preservation results in minimal delays to initiation of cancer treatment and is unlikely to be clinically significant,” the investigators wrote. “There is no evidence of increased recurrence or mortality in fertility preservation patients versus controls, suggesting fertility preservation is safe for eligible cancer patients.”
Progress in cancer detection and survival has sharpened the focus on quality of life issues, including fertility preservation, the researchers said. But oncologists and patients themselves have raised concerns about postponing cancer treatment for this reason, and some have recommended shortening the delay by triggering ovarian stimulation regardless of the phase of the menstrual cycle – known as the “random start” protocol.
To explore these issues, the researchers reviewed the charts of all 553 cancer patients who had used the online patient navigator for fertility preservation at Northwestern University from 2006 to 2015.
A total of 213 patients pursued fertility preservation, while 340 did not. Undergoing fertility preservation postponed treatment of breast, hematologic, gynecologic, and other cancers by an average of 10 days, but this delay did not translate to worse recurrence rates or mortality, either overall or for any cancer subtype.
Cycle outcomes were similar between the 117 patients who underwent random-start protocols and the 23 patients underwent cycle-specific protocols, the investigators reported. Both protocols were associated with similar numbers of oocytes retrieved, numbers of mature oocytes, peak serum estradiol levels, days of stimulation, and times to cancer treatment.
The Northwestern Memorial Foundation supported the work. Dr. Moravek reported having no relevant financial disclosures.
SALT LAKE CITY – Delaying cancer treatment to allow women to undergo fertility preservation did not affect long-term cancer outcomes, suggest the findings from a retrospective study of more than 500 patients.
Over a median of 3.7 years of follow-up, 2.3% of patients who elected fertility preservation developed recurrent cancer, compared with 5.3% of patients who did not undergo fertility preservation (P = .09), according to Molly Moravek, MD, of the University of Michigan, Ann Arbor, and her associates.
Survival rates were 97.7% for patients who underwent fertility preservation and 94.1% for those who did not (P = .05), the investigators reported in a poster at the annual meeting of the American Society for Reproductive Medicine.
“Pursuing fertility preservation results in minimal delays to initiation of cancer treatment and is unlikely to be clinically significant,” the investigators wrote. “There is no evidence of increased recurrence or mortality in fertility preservation patients versus controls, suggesting fertility preservation is safe for eligible cancer patients.”
Progress in cancer detection and survival has sharpened the focus on quality of life issues, including fertility preservation, the researchers said. But oncologists and patients themselves have raised concerns about postponing cancer treatment for this reason, and some have recommended shortening the delay by triggering ovarian stimulation regardless of the phase of the menstrual cycle – known as the “random start” protocol.
To explore these issues, the researchers reviewed the charts of all 553 cancer patients who had used the online patient navigator for fertility preservation at Northwestern University from 2006 to 2015.
A total of 213 patients pursued fertility preservation, while 340 did not. Undergoing fertility preservation postponed treatment of breast, hematologic, gynecologic, and other cancers by an average of 10 days, but this delay did not translate to worse recurrence rates or mortality, either overall or for any cancer subtype.
Cycle outcomes were similar between the 117 patients who underwent random-start protocols and the 23 patients underwent cycle-specific protocols, the investigators reported. Both protocols were associated with similar numbers of oocytes retrieved, numbers of mature oocytes, peak serum estradiol levels, days of stimulation, and times to cancer treatment.
The Northwestern Memorial Foundation supported the work. Dr. Moravek reported having no relevant financial disclosures.
AT 2016 ASRM
Key clinical point:
Major finding: Fertility preservation was associated with an average 10-day delay in cancer treatment, which did not affect rates of cancer recurrence or mortality.
Data source: Retrospective chart reviews of 553 patients with breast, hematologic, ovarian, and other cancers, with a median of 3.7 years of follow-up.
Disclosures: The Northwestern Memorial Foundation supported the work. Dr. Moravek reported having no relevant financial disclosures.
Women recovered half their ovarian reserve 13 months after chemotherapy
SALT LAKE CITY – Women who resumed menstruating after undergoing chemotherapy for breast cancer usually recovered about half their ovarian reserve 13 months later, according to interim results from a prospective cohort study.
“These findings provide important references for counseling patients before chemotherapy about their expectations for ovarian recovery. Patients who were not able to freeze enough oocytes before chemotherapy can expect to be able to stimulate approximately half as many for cryopreservation post chemo,” Joseph Letourneau, MD, and his colleagues at the University of California, San Francisco wrote in a poster presented at the annual meeting of the American Society for Reproductive Medicine.
Chemotherapy increases the risk of infertility and early menopause. But in past studies, some 70% to 80% of women regained at least some level of ovarian function after completing treatment, the researchers noted. Over the course of 6-12 months, quiescent follicles mature to the antral stage, in which exposure to follicle-stimulating hormone triggers their rapid growth and maturation. Thus, antral follicle count is an accepted marker of ovarian reserve that reliably predicts how many oocytes will be retrieved during in vitro fertilization and fertility preservation, according to the investigators.
Based on these observations, they tracked antral follicle counts over time among 199 patients who were seen for fertility preservation consultations before starting cyclophosphamide-based chemotherapy for breast cancer, and who resumed menstruating afterward. Before chemotherapy, these women had an average antral follicle count of 15, with a standard deviation of 12. They averaged 35 years of age, with a standard deviation of 5 years.
A total of 66 women returned after chemotherapy for follow-up, and underwent an average of four antral follicle counts, with a standard deviation of two, the researchers said. These measurements showed that for up to 12 months after finishing chemotherapy, patients typically had only about 14% to 25% of their baseline ovarian reserve. By month 13, however, antral follicle counts rose to an average of 52% of baseline, and remained at this level through month 18 and beyond.
Treatment with leuprolide during chemotherapy appeared to increase ovarian recovery from about month 7 onward, the researchers reported. Between 7 and 9 months after chemotherapy, antral follicle counts averaged 32% of baseline among patients who had received leuprolide, but were about 8% of baseline among patients who had not received leuprolide. Between months 13 and 18, leuprolide recipients recovered about 74% of their ovarian reserve, while other patients recovered about 35% (P = .09). Beyond month 18, leuprolide recipients recovered an average of 69% of their baseline antral follicle count and other patients recovered an average of 4 (P = .07).
“Women who did not take [leuprolide] during chemotherapy represent 75% of our study population,” the researchers said. “[These women] appeared to have lower antral follicle count recovery, despite resumption of menses, than those whose menses resumed after chemotherapy with concurrent [leuprolide].”
Dr. Letourneau reported having no relevant financial disclosures.
SALT LAKE CITY – Women who resumed menstruating after undergoing chemotherapy for breast cancer usually recovered about half their ovarian reserve 13 months later, according to interim results from a prospective cohort study.
“These findings provide important references for counseling patients before chemotherapy about their expectations for ovarian recovery. Patients who were not able to freeze enough oocytes before chemotherapy can expect to be able to stimulate approximately half as many for cryopreservation post chemo,” Joseph Letourneau, MD, and his colleagues at the University of California, San Francisco wrote in a poster presented at the annual meeting of the American Society for Reproductive Medicine.
Chemotherapy increases the risk of infertility and early menopause. But in past studies, some 70% to 80% of women regained at least some level of ovarian function after completing treatment, the researchers noted. Over the course of 6-12 months, quiescent follicles mature to the antral stage, in which exposure to follicle-stimulating hormone triggers their rapid growth and maturation. Thus, antral follicle count is an accepted marker of ovarian reserve that reliably predicts how many oocytes will be retrieved during in vitro fertilization and fertility preservation, according to the investigators.
Based on these observations, they tracked antral follicle counts over time among 199 patients who were seen for fertility preservation consultations before starting cyclophosphamide-based chemotherapy for breast cancer, and who resumed menstruating afterward. Before chemotherapy, these women had an average antral follicle count of 15, with a standard deviation of 12. They averaged 35 years of age, with a standard deviation of 5 years.
A total of 66 women returned after chemotherapy for follow-up, and underwent an average of four antral follicle counts, with a standard deviation of two, the researchers said. These measurements showed that for up to 12 months after finishing chemotherapy, patients typically had only about 14% to 25% of their baseline ovarian reserve. By month 13, however, antral follicle counts rose to an average of 52% of baseline, and remained at this level through month 18 and beyond.
Treatment with leuprolide during chemotherapy appeared to increase ovarian recovery from about month 7 onward, the researchers reported. Between 7 and 9 months after chemotherapy, antral follicle counts averaged 32% of baseline among patients who had received leuprolide, but were about 8% of baseline among patients who had not received leuprolide. Between months 13 and 18, leuprolide recipients recovered about 74% of their ovarian reserve, while other patients recovered about 35% (P = .09). Beyond month 18, leuprolide recipients recovered an average of 69% of their baseline antral follicle count and other patients recovered an average of 4 (P = .07).
“Women who did not take [leuprolide] during chemotherapy represent 75% of our study population,” the researchers said. “[These women] appeared to have lower antral follicle count recovery, despite resumption of menses, than those whose menses resumed after chemotherapy with concurrent [leuprolide].”
Dr. Letourneau reported having no relevant financial disclosures.
SALT LAKE CITY – Women who resumed menstruating after undergoing chemotherapy for breast cancer usually recovered about half their ovarian reserve 13 months later, according to interim results from a prospective cohort study.
“These findings provide important references for counseling patients before chemotherapy about their expectations for ovarian recovery. Patients who were not able to freeze enough oocytes before chemotherapy can expect to be able to stimulate approximately half as many for cryopreservation post chemo,” Joseph Letourneau, MD, and his colleagues at the University of California, San Francisco wrote in a poster presented at the annual meeting of the American Society for Reproductive Medicine.
Chemotherapy increases the risk of infertility and early menopause. But in past studies, some 70% to 80% of women regained at least some level of ovarian function after completing treatment, the researchers noted. Over the course of 6-12 months, quiescent follicles mature to the antral stage, in which exposure to follicle-stimulating hormone triggers their rapid growth and maturation. Thus, antral follicle count is an accepted marker of ovarian reserve that reliably predicts how many oocytes will be retrieved during in vitro fertilization and fertility preservation, according to the investigators.
Based on these observations, they tracked antral follicle counts over time among 199 patients who were seen for fertility preservation consultations before starting cyclophosphamide-based chemotherapy for breast cancer, and who resumed menstruating afterward. Before chemotherapy, these women had an average antral follicle count of 15, with a standard deviation of 12. They averaged 35 years of age, with a standard deviation of 5 years.
A total of 66 women returned after chemotherapy for follow-up, and underwent an average of four antral follicle counts, with a standard deviation of two, the researchers said. These measurements showed that for up to 12 months after finishing chemotherapy, patients typically had only about 14% to 25% of their baseline ovarian reserve. By month 13, however, antral follicle counts rose to an average of 52% of baseline, and remained at this level through month 18 and beyond.
Treatment with leuprolide during chemotherapy appeared to increase ovarian recovery from about month 7 onward, the researchers reported. Between 7 and 9 months after chemotherapy, antral follicle counts averaged 32% of baseline among patients who had received leuprolide, but were about 8% of baseline among patients who had not received leuprolide. Between months 13 and 18, leuprolide recipients recovered about 74% of their ovarian reserve, while other patients recovered about 35% (P = .09). Beyond month 18, leuprolide recipients recovered an average of 69% of their baseline antral follicle count and other patients recovered an average of 4 (P = .07).
“Women who did not take [leuprolide] during chemotherapy represent 75% of our study population,” the researchers said. “[These women] appeared to have lower antral follicle count recovery, despite resumption of menses, than those whose menses resumed after chemotherapy with concurrent [leuprolide].”
Dr. Letourneau reported having no relevant financial disclosures.
Key clinical point:
Major finding: Average antral follicle counts rose to 52% of baseline, on average, by 13 months after patients completed chemotherapy.
Data source: A prospective cohort study of 66 patients who resumed menstruating and returned for at least one follow-up visit after chemotherapy.
Disclosures: Dr. Letourneau reported having no relevant financial disclosures.
Polychlorinated Biphenyls Are Associated With Risk of Parkinson’s Disease
PORTLAND, OR—Higher serum levels of polychlorinated biphenyls (PCBs) were associated with an increased risk of Parkinson’s disease in two independent study populations, according to research data presented at the Fourth World Parkinson Congress.
Samuel Goldman, MD, MPH, Principal Investigator of Neurology at San Francisco Veterans Affairs Medical Center and Associate Professor of Neurology at the University of California, San Francisco, and colleagues examined whether recently observed associations of serum PCBs and Parkinson’s disease could be replicated in an independent study population.
PCBs—persistent environmental pollutants that are detectable in most people despite a worldwide ban on their production that has been in place for more than 20 years—cause selective dopaminergic toxicity in animal models, but have been minimally studied in Parkinson’s disease, the researchers said.
The investigators recently reported a significantly increased risk of Parkinson’s disease associated with higher levels of serum PCBs in a case–control study of Alaska Native people. In the present study, they investigated this association in a demographically dissimilar study population.
They identified people with Parkinson’s disease within the Agricultural Health Study, a cohort of pesticide applicators and their spouses in Iowa and North Carolina. They also randomly selected controls matched for age, sex, and state. They confirmed Parkinson’s disease diagnoses by in-person neurologist evaluation and consensus review. PCB congeners 118, 138, 153, and 180 were measured as ng/g lipid in serum using gas chromatography–mass spectrometry. Dose responsewas assessed using quartiles for each congener and for the sum of congeners. They used logistic regression, adjusting for age, gender, and state, to calculate odds ratios.
Ninety-seven people with Parkinson’s disease and 113 controls were included in the study. About 25% of the participants were women. Mean age was 69. Parkinson’s disease was associated with higher levels of PCBs. A significant dose response was seen across quartiles. Participants in the second, third, and fourth quartiles of total PCB levels had a 1.7-, 2.4-, and 2.7-fold greater risk of Parkinson’s disease, respectively, compared with participants in the lowest quartile of total PCB levels. Odds ratios were similar in the Agricultural Health Study and the Alaska study. In both studies, PCB levels correlated positively with age but not with disease duration, which argues against reverse causation, the researchers said.
—Jake Remaly
PORTLAND, OR—Higher serum levels of polychlorinated biphenyls (PCBs) were associated with an increased risk of Parkinson’s disease in two independent study populations, according to research data presented at the Fourth World Parkinson Congress.
Samuel Goldman, MD, MPH, Principal Investigator of Neurology at San Francisco Veterans Affairs Medical Center and Associate Professor of Neurology at the University of California, San Francisco, and colleagues examined whether recently observed associations of serum PCBs and Parkinson’s disease could be replicated in an independent study population.
PCBs—persistent environmental pollutants that are detectable in most people despite a worldwide ban on their production that has been in place for more than 20 years—cause selective dopaminergic toxicity in animal models, but have been minimally studied in Parkinson’s disease, the researchers said.
The investigators recently reported a significantly increased risk of Parkinson’s disease associated with higher levels of serum PCBs in a case–control study of Alaska Native people. In the present study, they investigated this association in a demographically dissimilar study population.
They identified people with Parkinson’s disease within the Agricultural Health Study, a cohort of pesticide applicators and their spouses in Iowa and North Carolina. They also randomly selected controls matched for age, sex, and state. They confirmed Parkinson’s disease diagnoses by in-person neurologist evaluation and consensus review. PCB congeners 118, 138, 153, and 180 were measured as ng/g lipid in serum using gas chromatography–mass spectrometry. Dose responsewas assessed using quartiles for each congener and for the sum of congeners. They used logistic regression, adjusting for age, gender, and state, to calculate odds ratios.
Ninety-seven people with Parkinson’s disease and 113 controls were included in the study. About 25% of the participants were women. Mean age was 69. Parkinson’s disease was associated with higher levels of PCBs. A significant dose response was seen across quartiles. Participants in the second, third, and fourth quartiles of total PCB levels had a 1.7-, 2.4-, and 2.7-fold greater risk of Parkinson’s disease, respectively, compared with participants in the lowest quartile of total PCB levels. Odds ratios were similar in the Agricultural Health Study and the Alaska study. In both studies, PCB levels correlated positively with age but not with disease duration, which argues against reverse causation, the researchers said.
—Jake Remaly
PORTLAND, OR—Higher serum levels of polychlorinated biphenyls (PCBs) were associated with an increased risk of Parkinson’s disease in two independent study populations, according to research data presented at the Fourth World Parkinson Congress.
Samuel Goldman, MD, MPH, Principal Investigator of Neurology at San Francisco Veterans Affairs Medical Center and Associate Professor of Neurology at the University of California, San Francisco, and colleagues examined whether recently observed associations of serum PCBs and Parkinson’s disease could be replicated in an independent study population.
PCBs—persistent environmental pollutants that are detectable in most people despite a worldwide ban on their production that has been in place for more than 20 years—cause selective dopaminergic toxicity in animal models, but have been minimally studied in Parkinson’s disease, the researchers said.
The investigators recently reported a significantly increased risk of Parkinson’s disease associated with higher levels of serum PCBs in a case–control study of Alaska Native people. In the present study, they investigated this association in a demographically dissimilar study population.
They identified people with Parkinson’s disease within the Agricultural Health Study, a cohort of pesticide applicators and their spouses in Iowa and North Carolina. They also randomly selected controls matched for age, sex, and state. They confirmed Parkinson’s disease diagnoses by in-person neurologist evaluation and consensus review. PCB congeners 118, 138, 153, and 180 were measured as ng/g lipid in serum using gas chromatography–mass spectrometry. Dose responsewas assessed using quartiles for each congener and for the sum of congeners. They used logistic regression, adjusting for age, gender, and state, to calculate odds ratios.
Ninety-seven people with Parkinson’s disease and 113 controls were included in the study. About 25% of the participants were women. Mean age was 69. Parkinson’s disease was associated with higher levels of PCBs. A significant dose response was seen across quartiles. Participants in the second, third, and fourth quartiles of total PCB levels had a 1.7-, 2.4-, and 2.7-fold greater risk of Parkinson’s disease, respectively, compared with participants in the lowest quartile of total PCB levels. Odds ratios were similar in the Agricultural Health Study and the Alaska study. In both studies, PCB levels correlated positively with age but not with disease duration, which argues against reverse causation, the researchers said.
—Jake Remaly
“Honoring Our Mentors” Fellowship Open for Submission
The AATS Graham Foundation is calling for submission for its Denton A. Cooley “Honoring Our Mentors” fellowship.
Denton A. Cooley Fellowship
New! Provides a deserving CT surgeon resident or young postgraduate surgeon the opportunity to enrich his/her education during four weeks of study at the Texas Heart Institute and Baylor St. Luke’s Medical Center.
Deadline: December 30, 2016
Share:
The AATS Graham Foundation is calling for submission for its Denton A. Cooley “Honoring Our Mentors” fellowship.
Denton A. Cooley Fellowship
New! Provides a deserving CT surgeon resident or young postgraduate surgeon the opportunity to enrich his/her education during four weeks of study at the Texas Heart Institute and Baylor St. Luke’s Medical Center.
Deadline: December 30, 2016
Share:
The AATS Graham Foundation is calling for submission for its Denton A. Cooley “Honoring Our Mentors” fellowship.
Denton A. Cooley Fellowship
New! Provides a deserving CT surgeon resident or young postgraduate surgeon the opportunity to enrich his/her education during four weeks of study at the Texas Heart Institute and Baylor St. Luke’s Medical Center.
Deadline: December 30, 2016
Share:
Lipoic Acid Reduces Brain Atrophy in Secondary Progressive MS
LONDON—Daily oral intake of 1,200 mg of racemic lipoic acid significantly reduces the rate of whole brain atrophy among patients with secondary progressive multiple sclerosis (MS), according to data described at the 32nd Congress of the European Committee for Treatment and Research in MS (ECTRIMS). Overall, lipoic acid is safe and well tolerated.
“These results need further exploration in a larger sample size to clarify the effect size of lipoic acid, to determine the clinical benefits associated with reduction in brain atrophy, and to explore the mechanisms of action of lipoic acid in progressive MS,” said Rebecca Spain, MD, MSPH, neurologist at the VA Portland Health Care System and Oregon Health & Science University in Portland.
An Antioxidant With Many Roles
Lipoic acid is a small-molecule antioxidant with several biologic functions, such as participating in oxidative respiration in mitochondria, influencing endothelial cell function, and inhibiting inappropriate microglial activation. A synthetic version of the antioxidant is available commercially at low cost.
Several studies have indicated that lipoic acid reduces disability in mice with experimental autoimmune encephalomyelitis. Based on those results, Dr. Spain and colleagues conducted a two-year, double-blind trial in which patients with secondary progressive MS were randomized in equal groups to 1,200 mg/day of oral racemic lipoic acid or placebo. Participants underwent yearly MRI. The investigators’ primary outcome was the annualized percent change in brain volume, as measured by structural image evaluation, using normalization of atrophy (SIENA). They also sought to compare changes in disability and quality of life between the two groups and to assess the safety and tolerability of lipoic acid.
In their intention-to-treat analysis, the researchers used a linear mixed model approach to evaluate the effects of lipoic acid on annualized rates of change in outcomes. They corrected the models for age, sex, and disease duration.
In all, 54 patients were randomized, and three withdrew before receiving treatment. The intention-to-treat placebo cohort included 24 patients, and the lipoic-acid cohort had 27 patients. Five participants, all in the lipoic-acid cohort, dropped out of the study. One person had claustrophobia and could not tolerate the MRI. Another participant had nausea and vomiting that subsided on discontinuation of lipoic acid. The third dropout had a new diagnosis of prostate cancer. The fourth had new proteinuria, and the fifth had worsening renal function.
The study population was representative of people with secondary progressive MS, albeit with greater disability. Mean age was 60, and average disease duration was 30 years. The treatment arms were well matched at baseline.
Trend Toward Improved Walking
The annualized rate of brain atrophy was 0.65% for the placebo group, “which is comparable to [that of] other progressive MS natural history cohorts,” said Dr. Spain. Among patients receiving lipoic acid, the annualized rate of brain atrophy was 0.22%, which was significantly different from that of the placebo cohort. “This represents a 66% reduction in the rate of brain atrophy in the lipoic-acid cohort, compared with placebo,” said Dr. Spain.
No other outcomes were significantly different between groups at 96 weeks. Performance on the Timed 25-Foot Walk test, however, tended to improve by approximately 12% (ie, from 8 seconds to 7 seconds) among participants receiving lipoic acid.
Gastrointestinal upset was significantly more common among participants receiving lipoic acid, as would be expected because of previous studies. New-onset proteinuria and worsening renal function were observed in the lipoic-acid cohort, but a consulting nephrologist did not consider either adverse event to be related to treatment. Unexpectedly, the investigators observed half as many falls in the lipoic acid arm, compared with controls.
The US Department of Veterans Affairs and the NIH supported this research. Pure Encapsulations provided the lipoic acid and placebo.
—Erik Greb
Suggested Reading
Chaudhary P, Marracci G, Galipeau D, et al. Lipoic acid reduces inflammation in a mouse focal cortical experimental autoimmune encephalomyelitis model. J Neuroimmunol. 2015;289:68-74.
Plemel JR, Juzwik CA, Benson CA, et al. Over-the-counter anti-oxidant therapies for use in multiple sclerosis: A systematic review. Mult Scler. 2015;21(12):1485-1495.
Yadav V, Marracci G, Lovera J, et al. Lipoic acid in multiple sclerosis: a pilot study. Mult Scler. 2005;11(2):159-165.
LONDON—Daily oral intake of 1,200 mg of racemic lipoic acid significantly reduces the rate of whole brain atrophy among patients with secondary progressive multiple sclerosis (MS), according to data described at the 32nd Congress of the European Committee for Treatment and Research in MS (ECTRIMS). Overall, lipoic acid is safe and well tolerated.
“These results need further exploration in a larger sample size to clarify the effect size of lipoic acid, to determine the clinical benefits associated with reduction in brain atrophy, and to explore the mechanisms of action of lipoic acid in progressive MS,” said Rebecca Spain, MD, MSPH, neurologist at the VA Portland Health Care System and Oregon Health & Science University in Portland.
An Antioxidant With Many Roles
Lipoic acid is a small-molecule antioxidant with several biologic functions, such as participating in oxidative respiration in mitochondria, influencing endothelial cell function, and inhibiting inappropriate microglial activation. A synthetic version of the antioxidant is available commercially at low cost.
Several studies have indicated that lipoic acid reduces disability in mice with experimental autoimmune encephalomyelitis. Based on those results, Dr. Spain and colleagues conducted a two-year, double-blind trial in which patients with secondary progressive MS were randomized in equal groups to 1,200 mg/day of oral racemic lipoic acid or placebo. Participants underwent yearly MRI. The investigators’ primary outcome was the annualized percent change in brain volume, as measured by structural image evaluation, using normalization of atrophy (SIENA). They also sought to compare changes in disability and quality of life between the two groups and to assess the safety and tolerability of lipoic acid.
In their intention-to-treat analysis, the researchers used a linear mixed model approach to evaluate the effects of lipoic acid on annualized rates of change in outcomes. They corrected the models for age, sex, and disease duration.
In all, 54 patients were randomized, and three withdrew before receiving treatment. The intention-to-treat placebo cohort included 24 patients, and the lipoic-acid cohort had 27 patients. Five participants, all in the lipoic-acid cohort, dropped out of the study. One person had claustrophobia and could not tolerate the MRI. Another participant had nausea and vomiting that subsided on discontinuation of lipoic acid. The third dropout had a new diagnosis of prostate cancer. The fourth had new proteinuria, and the fifth had worsening renal function.
The study population was representative of people with secondary progressive MS, albeit with greater disability. Mean age was 60, and average disease duration was 30 years. The treatment arms were well matched at baseline.
Trend Toward Improved Walking
The annualized rate of brain atrophy was 0.65% for the placebo group, “which is comparable to [that of] other progressive MS natural history cohorts,” said Dr. Spain. Among patients receiving lipoic acid, the annualized rate of brain atrophy was 0.22%, which was significantly different from that of the placebo cohort. “This represents a 66% reduction in the rate of brain atrophy in the lipoic-acid cohort, compared with placebo,” said Dr. Spain.
No other outcomes were significantly different between groups at 96 weeks. Performance on the Timed 25-Foot Walk test, however, tended to improve by approximately 12% (ie, from 8 seconds to 7 seconds) among participants receiving lipoic acid.
Gastrointestinal upset was significantly more common among participants receiving lipoic acid, as would be expected because of previous studies. New-onset proteinuria and worsening renal function were observed in the lipoic-acid cohort, but a consulting nephrologist did not consider either adverse event to be related to treatment. Unexpectedly, the investigators observed half as many falls in the lipoic acid arm, compared with controls.
The US Department of Veterans Affairs and the NIH supported this research. Pure Encapsulations provided the lipoic acid and placebo.
—Erik Greb
Suggested Reading
Chaudhary P, Marracci G, Galipeau D, et al. Lipoic acid reduces inflammation in a mouse focal cortical experimental autoimmune encephalomyelitis model. J Neuroimmunol. 2015;289:68-74.
Plemel JR, Juzwik CA, Benson CA, et al. Over-the-counter anti-oxidant therapies for use in multiple sclerosis: A systematic review. Mult Scler. 2015;21(12):1485-1495.
Yadav V, Marracci G, Lovera J, et al. Lipoic acid in multiple sclerosis: a pilot study. Mult Scler. 2005;11(2):159-165.
LONDON—Daily oral intake of 1,200 mg of racemic lipoic acid significantly reduces the rate of whole brain atrophy among patients with secondary progressive multiple sclerosis (MS), according to data described at the 32nd Congress of the European Committee for Treatment and Research in MS (ECTRIMS). Overall, lipoic acid is safe and well tolerated.
“These results need further exploration in a larger sample size to clarify the effect size of lipoic acid, to determine the clinical benefits associated with reduction in brain atrophy, and to explore the mechanisms of action of lipoic acid in progressive MS,” said Rebecca Spain, MD, MSPH, neurologist at the VA Portland Health Care System and Oregon Health & Science University in Portland.
An Antioxidant With Many Roles
Lipoic acid is a small-molecule antioxidant with several biologic functions, such as participating in oxidative respiration in mitochondria, influencing endothelial cell function, and inhibiting inappropriate microglial activation. A synthetic version of the antioxidant is available commercially at low cost.
Several studies have indicated that lipoic acid reduces disability in mice with experimental autoimmune encephalomyelitis. Based on those results, Dr. Spain and colleagues conducted a two-year, double-blind trial in which patients with secondary progressive MS were randomized in equal groups to 1,200 mg/day of oral racemic lipoic acid or placebo. Participants underwent yearly MRI. The investigators’ primary outcome was the annualized percent change in brain volume, as measured by structural image evaluation, using normalization of atrophy (SIENA). They also sought to compare changes in disability and quality of life between the two groups and to assess the safety and tolerability of lipoic acid.
In their intention-to-treat analysis, the researchers used a linear mixed model approach to evaluate the effects of lipoic acid on annualized rates of change in outcomes. They corrected the models for age, sex, and disease duration.
In all, 54 patients were randomized, and three withdrew before receiving treatment. The intention-to-treat placebo cohort included 24 patients, and the lipoic-acid cohort had 27 patients. Five participants, all in the lipoic-acid cohort, dropped out of the study. One person had claustrophobia and could not tolerate the MRI. Another participant had nausea and vomiting that subsided on discontinuation of lipoic acid. The third dropout had a new diagnosis of prostate cancer. The fourth had new proteinuria, and the fifth had worsening renal function.
The study population was representative of people with secondary progressive MS, albeit with greater disability. Mean age was 60, and average disease duration was 30 years. The treatment arms were well matched at baseline.
Trend Toward Improved Walking
The annualized rate of brain atrophy was 0.65% for the placebo group, “which is comparable to [that of] other progressive MS natural history cohorts,” said Dr. Spain. Among patients receiving lipoic acid, the annualized rate of brain atrophy was 0.22%, which was significantly different from that of the placebo cohort. “This represents a 66% reduction in the rate of brain atrophy in the lipoic-acid cohort, compared with placebo,” said Dr. Spain.
No other outcomes were significantly different between groups at 96 weeks. Performance on the Timed 25-Foot Walk test, however, tended to improve by approximately 12% (ie, from 8 seconds to 7 seconds) among participants receiving lipoic acid.
Gastrointestinal upset was significantly more common among participants receiving lipoic acid, as would be expected because of previous studies. New-onset proteinuria and worsening renal function were observed in the lipoic-acid cohort, but a consulting nephrologist did not consider either adverse event to be related to treatment. Unexpectedly, the investigators observed half as many falls in the lipoic acid arm, compared with controls.
The US Department of Veterans Affairs and the NIH supported this research. Pure Encapsulations provided the lipoic acid and placebo.
—Erik Greb
Suggested Reading
Chaudhary P, Marracci G, Galipeau D, et al. Lipoic acid reduces inflammation in a mouse focal cortical experimental autoimmune encephalomyelitis model. J Neuroimmunol. 2015;289:68-74.
Plemel JR, Juzwik CA, Benson CA, et al. Over-the-counter anti-oxidant therapies for use in multiple sclerosis: A systematic review. Mult Scler. 2015;21(12):1485-1495.
Yadav V, Marracci G, Lovera J, et al. Lipoic acid in multiple sclerosis: a pilot study. Mult Scler. 2005;11(2):159-165.
New and Noteworthy Information—November 2016
Exercise may be associated with a small benefit for elderly people who have memory and thinking problems, according to a study published online ahead of print October 19 in Neurology. Researchers studied 70 adults randomized to six months of aerobic exercise training or usual care plus education on cognitive and everyday function. The aerobic exercise training group had significantly improved Alzheimer's Disease Assessment Scale-Cognitive subscale performance, compared with controls. This difference was not significant at six-month follow-up, however. There were no significant between-group differences at intervention completion and at the six-month follow-up in Executive Interview or Alzheimer's Disease Cooperative Study-Activities of Daily Living performance. Examination of secondary measures showed between-group differences at intervention completion favoring the exercise training program group in six-minute walk distance and in diastolic blood pressure.
The FDA has approved Carnexiv (carbamazepine) injection as a short-term replacement therapy for oral carbamazepine formulations in adults with certain seizure types when oral administration is temporarily not feasible. Carnexiv has received orphan drug designation for this indication and will be the first available IV formulation of carbamazepine. The drug is intended for people with partial seizures with complex symptomatology, generalized tonic-clonic seizures, mixed seizure patterns, or other partial or generalized seizures. Carnexiv is not indicated for the treatment of absence seizures. People taking Carnexiv should not discontinue the drug abruptly because of the risk of seizures, status epilepticus, and other withdrawal signs and symptoms. In addition, Carnexiv should not be used in patients with moderate or severe renal impairment. The drug is marketed by Lundbeck, which is headquartered in Deerfield, Illinois.
Chiropractic spinal manipulative therapy (CSMT) is no more effective than placebo for migraine, according to a study published online ahead of print October 2 in the European Journal of Neurology. Investigators randomized 104 migraineurs with at least one migraine attack per month to CSMT, sham chiropractic, or usual pharmacologic management for 17 months. Migraine days were significantly reduced within all three groups from baseline to post treatment. The effect continued in the CSMT and placebo groups at all follow-up time points, but the control group returned to baseline. The reduction in migraine days was not significantly different between the groups. Migraine duration and headache index were reduced significantly more in the CSMT group than in the control group toward the end of follow-up.
Video monitoring facilitates nocturnal surveillance of patients with epilepsy, but the costs are high, according to a study published online ahead of print September 30 in Epilepsia. For six months, researchers asked caregivers at an epilepsy unit to specify whether an acoustic detection system, bed motion sensor, or video monitoring alerted them to seizures and whether the alerts led to interventions. They identified 1,208 seizures in 37 people. Four people had no nocturnal seizures, and 33% of seizures were seen only on video. In 14% of seizures, including 10% of seizures seen only on video, an intervention was made. The extra costs of monitoring were 7,035 euro per seizure seen only on video and leading to an intervention. The results underscore the need for reliable seizure-detection devices, said the authors.
A higher level of physical activity may not reduce a woman's risk of multiple sclerosis (MS), according to a study published online ahead of print September 28 in Neurology. Researchers calculated total metabolic equivalent hours of physical activity per week for women participating in the Nurses' Health Study (NHS) and NHS II. There were 341 confirmed MS cases with first symptoms after baseline. Participants also reported early-life activity. The investigators analyzed the data with Cox proportional hazards models. Compared with women in the lowest baseline physical activity quartile, women in the highest quartile had a 27% reduced rate of MS. This trend was not present in six-year lagged analyses, however. In NHS II, total early life activity at ages 12 to 22 was not associated with MS.
Youth with primary hypertension have significantly worse performance on neurocognitive testing, compared with normotensive controls, according to a study published online ahead of print September 27 in the Journal of Pediatrics.Seventy-five children with newly diagnosed, untreated hypertension and 75 frequency-matched normotensive controls had baseline neurocognitive testing as part of a prospective multicenter study of cognition in primary hypertension. The participants completed general intelligence, attention, memory, executive function, and processing speed tests. Parents rated participants' executive function and sleep disordered breathing. The study groups were well matched. Hypertension was independently associated with worse memory, attention, and executive function, compared with normotension. Results indicated a significant interaction between disordered sleep and hypertension on ratings of executive function. Hypertension heightened the association between increased disordered sleep and worse executive function.
Headache disorders may be associated with an increased risk for the development of new-onset hypothyroidism, according to a study published online ahead of print September 27 in Headache. This longitudinal retrospective cohort study used data from 8,412 participants enrolled in the Fernald Medical Monitoring Program. Participants underwent physical examinations and thyroid function testing every three years during the 20-year program. The primary outcome measure was new-onset hypothyroidism, defined as the initiation of thyroid replacement therapy or thyroid-stimulating hormone test value greater than or equal to 10 without thyroid medication. Headache disorders were present in about 26% of the participants, and new-onset hypothyroidism developed in approximately 7% of participants. The hazard ratio for the development of new-onset hypothyroidism was 1.21 for people with headache disorders.
People with epilepsy can face various psychosocial adversities and extensively report feeling discriminated against, compared with the general population, according to a study published online ahead of print September 16 in Epilepsia. The Adult Psychiatric Morbidity Survey 2007 included comprehensive interviews with 7,403 people. Overall, people with epilepsy were sevenfold more likely to have reported experiencing discrimination due to health problems than the general population without epilepsy. People with epilepsy also had greater odds of experiencing domestic violence and sexual abuse than the general population, although these associations were also found in people with other chronic conditions. There was less evidence of an association between epilepsy and a history of physical abuse or having a greater burden of other stressful life events.
Short episodes of atrial tachycardia or fibrillation are not associated with increased risk of clinical events, compared with absence of these episodes, according to a study published October 18 in Circulation. The Registry of Atrial Tachycardia and Atrial Fibrillation Episodes enrolled 5,379 patients with pacemakers or implantable cardioverter defibrillators. There were 478 hospitalizations among 342 patients for clinical events. Study authors adjudicated 37,531 electrograms. Patients with clinical events were more likely than those without them to have long atrial tachycardia or fibrillation. Only short episodes of atrial tachycardia or fibrillation were documented in 9% of patients with pacemakers and in 16% of patients with implantable cardioverter defibrillators. Patients with clinical events were no more likely than those without them to have short atrial tachycardia or fibrillation.
A brain signature identifies patients with fibromyalgia with 93% accuracy, according to a study published online ahead of print August 31 in Pain. Researchers examined 37 patients with fibromyalgia and 35 matched healthy controls. They analyzed participants' functional MRI responses to painful pressure and nonpainful multisensory stimulation. Investigators used machine-learning techniques to identify a brain-based fibromyalgia signature. When exposed to the same painful stimuli, patients with fibromyalgia had greater Neurologic Pain Signature responses. Furthermore, a new pain-related classifier revealed augmented responses in sensory integration and self-referential regions in fibromyalgia, and reduced responses in the lateral frontal cortex. Combined activity in the Neurologic Pain Signature, fibromyalgia pain, and multisensory patterns classified patients vs. controls with 92% sensitivity and 94% specificity in individuals who were not part of the study sample.
Children have measurable brain changes after a single season of youth football, even when they do not sustain a concussion, according to a study published online ahead of print October 24 in Radiology. Head impact data were recorded using the Head Impact Telemetry system and quantified as the combined-probability risk-weighted cumulative exposure. Twenty-five male participants were evaluated for seasonal fractional anisotropy changes in the inferior fronto-occipital fasciculus, inferior longitudinal fasciculus, and superior longitudinal fasciculus. There were statistically significant linear relationships between risk-weighted cumulative exposure and decreased fractional anisotropy in the whole, core, and terminals of the left inferior fronto-occipital fasciculus. A trend toward statistical significance in the right superior longitudinal fasciculus was observed. Decrease in fractional anisotropy of the right superior longitudinal fasciculus terminal was significantly correlated with risk-weighted cumulative exposure.
Zika virus contributes to the development of Guillain-Barré syndrome, according to a study published online ahead of print October 5 in the New England Journal of Medicine. From November 2015 through March 2016, clusters of cases of Guillain-Barré syndrome were observed during an outbreak of Zika virus in Colombia. Researchers characterized the clinical features of 68 patients with Guillain-Barré syndrome during the outbreak and investigated their relationship with Zika virus infection. In all, 97% of patients had symptoms compatible with Zika virus infection before the onset of Guillain-Barré syndrome. Among the 42 patients who had samples tested for Zika virus infection, the results were positive in 40%. Most of the positive results were in urine samples, although three samples of CSF were also positive.
Among patients with amnestic mild cognitive impairment (aMCI), women have better verbal memory than men despite similar levels of brain hypometabolism, according to a study published online ahead of print October 5 in Neurology. In the Alzheimer's Disease Neuroimaging Initiative, 390 controls, 672 participants with aMCI, and 254 people with Alzheimer's disease dementia completed the Rey Auditory Verbal Learning Test and [18F]-fluorodeoxyglucose-PET. Female sex, higher temporal lobe glucose metabolic rates (TLGluMR), and the interaction of the two factors were associated with better verbal memory. The female advantage in verbal memory was greatest in people with moderate to high TLGluMR and minimal or absent among individuals with lower TLGluMR. Diagnosis-stratified analyses revealed that this interaction was driven by the aMCI group.
—Kimberly Williams
Exercise may be associated with a small benefit for elderly people who have memory and thinking problems, according to a study published online ahead of print October 19 in Neurology. Researchers studied 70 adults randomized to six months of aerobic exercise training or usual care plus education on cognitive and everyday function. The aerobic exercise training group had significantly improved Alzheimer's Disease Assessment Scale-Cognitive subscale performance, compared with controls. This difference was not significant at six-month follow-up, however. There were no significant between-group differences at intervention completion and at the six-month follow-up in Executive Interview or Alzheimer's Disease Cooperative Study-Activities of Daily Living performance. Examination of secondary measures showed between-group differences at intervention completion favoring the exercise training program group in six-minute walk distance and in diastolic blood pressure.
The FDA has approved Carnexiv (carbamazepine) injection as a short-term replacement therapy for oral carbamazepine formulations in adults with certain seizure types when oral administration is temporarily not feasible. Carnexiv has received orphan drug designation for this indication and will be the first available IV formulation of carbamazepine. The drug is intended for people with partial seizures with complex symptomatology, generalized tonic-clonic seizures, mixed seizure patterns, or other partial or generalized seizures. Carnexiv is not indicated for the treatment of absence seizures. People taking Carnexiv should not discontinue the drug abruptly because of the risk of seizures, status epilepticus, and other withdrawal signs and symptoms. In addition, Carnexiv should not be used in patients with moderate or severe renal impairment. The drug is marketed by Lundbeck, which is headquartered in Deerfield, Illinois.
Chiropractic spinal manipulative therapy (CSMT) is no more effective than placebo for migraine, according to a study published online ahead of print October 2 in the European Journal of Neurology. Investigators randomized 104 migraineurs with at least one migraine attack per month to CSMT, sham chiropractic, or usual pharmacologic management for 17 months. Migraine days were significantly reduced within all three groups from baseline to post treatment. The effect continued in the CSMT and placebo groups at all follow-up time points, but the control group returned to baseline. The reduction in migraine days was not significantly different between the groups. Migraine duration and headache index were reduced significantly more in the CSMT group than in the control group toward the end of follow-up.
Video monitoring facilitates nocturnal surveillance of patients with epilepsy, but the costs are high, according to a study published online ahead of print September 30 in Epilepsia. For six months, researchers asked caregivers at an epilepsy unit to specify whether an acoustic detection system, bed motion sensor, or video monitoring alerted them to seizures and whether the alerts led to interventions. They identified 1,208 seizures in 37 people. Four people had no nocturnal seizures, and 33% of seizures were seen only on video. In 14% of seizures, including 10% of seizures seen only on video, an intervention was made. The extra costs of monitoring were 7,035 euro per seizure seen only on video and leading to an intervention. The results underscore the need for reliable seizure-detection devices, said the authors.
A higher level of physical activity may not reduce a woman's risk of multiple sclerosis (MS), according to a study published online ahead of print September 28 in Neurology. Researchers calculated total metabolic equivalent hours of physical activity per week for women participating in the Nurses' Health Study (NHS) and NHS II. There were 341 confirmed MS cases with first symptoms after baseline. Participants also reported early-life activity. The investigators analyzed the data with Cox proportional hazards models. Compared with women in the lowest baseline physical activity quartile, women in the highest quartile had a 27% reduced rate of MS. This trend was not present in six-year lagged analyses, however. In NHS II, total early life activity at ages 12 to 22 was not associated with MS.
Youth with primary hypertension have significantly worse performance on neurocognitive testing, compared with normotensive controls, according to a study published online ahead of print September 27 in the Journal of Pediatrics.Seventy-five children with newly diagnosed, untreated hypertension and 75 frequency-matched normotensive controls had baseline neurocognitive testing as part of a prospective multicenter study of cognition in primary hypertension. The participants completed general intelligence, attention, memory, executive function, and processing speed tests. Parents rated participants' executive function and sleep disordered breathing. The study groups were well matched. Hypertension was independently associated with worse memory, attention, and executive function, compared with normotension. Results indicated a significant interaction between disordered sleep and hypertension on ratings of executive function. Hypertension heightened the association between increased disordered sleep and worse executive function.
Headache disorders may be associated with an increased risk for the development of new-onset hypothyroidism, according to a study published online ahead of print September 27 in Headache. This longitudinal retrospective cohort study used data from 8,412 participants enrolled in the Fernald Medical Monitoring Program. Participants underwent physical examinations and thyroid function testing every three years during the 20-year program. The primary outcome measure was new-onset hypothyroidism, defined as the initiation of thyroid replacement therapy or thyroid-stimulating hormone test value greater than or equal to 10 without thyroid medication. Headache disorders were present in about 26% of the participants, and new-onset hypothyroidism developed in approximately 7% of participants. The hazard ratio for the development of new-onset hypothyroidism was 1.21 for people with headache disorders.
People with epilepsy can face various psychosocial adversities and extensively report feeling discriminated against, compared with the general population, according to a study published online ahead of print September 16 in Epilepsia. The Adult Psychiatric Morbidity Survey 2007 included comprehensive interviews with 7,403 people. Overall, people with epilepsy were sevenfold more likely to have reported experiencing discrimination due to health problems than the general population without epilepsy. People with epilepsy also had greater odds of experiencing domestic violence and sexual abuse than the general population, although these associations were also found in people with other chronic conditions. There was less evidence of an association between epilepsy and a history of physical abuse or having a greater burden of other stressful life events.
Short episodes of atrial tachycardia or fibrillation are not associated with increased risk of clinical events, compared with absence of these episodes, according to a study published October 18 in Circulation. The Registry of Atrial Tachycardia and Atrial Fibrillation Episodes enrolled 5,379 patients with pacemakers or implantable cardioverter defibrillators. There were 478 hospitalizations among 342 patients for clinical events. Study authors adjudicated 37,531 electrograms. Patients with clinical events were more likely than those without them to have long atrial tachycardia or fibrillation. Only short episodes of atrial tachycardia or fibrillation were documented in 9% of patients with pacemakers and in 16% of patients with implantable cardioverter defibrillators. Patients with clinical events were no more likely than those without them to have short atrial tachycardia or fibrillation.
A brain signature identifies patients with fibromyalgia with 93% accuracy, according to a study published online ahead of print August 31 in Pain. Researchers examined 37 patients with fibromyalgia and 35 matched healthy controls. They analyzed participants' functional MRI responses to painful pressure and nonpainful multisensory stimulation. Investigators used machine-learning techniques to identify a brain-based fibromyalgia signature. When exposed to the same painful stimuli, patients with fibromyalgia had greater Neurologic Pain Signature responses. Furthermore, a new pain-related classifier revealed augmented responses in sensory integration and self-referential regions in fibromyalgia, and reduced responses in the lateral frontal cortex. Combined activity in the Neurologic Pain Signature, fibromyalgia pain, and multisensory patterns classified patients vs. controls with 92% sensitivity and 94% specificity in individuals who were not part of the study sample.
Children have measurable brain changes after a single season of youth football, even when they do not sustain a concussion, according to a study published online ahead of print October 24 in Radiology. Head impact data were recorded using the Head Impact Telemetry system and quantified as the combined-probability risk-weighted cumulative exposure. Twenty-five male participants were evaluated for seasonal fractional anisotropy changes in the inferior fronto-occipital fasciculus, inferior longitudinal fasciculus, and superior longitudinal fasciculus. There were statistically significant linear relationships between risk-weighted cumulative exposure and decreased fractional anisotropy in the whole, core, and terminals of the left inferior fronto-occipital fasciculus. A trend toward statistical significance in the right superior longitudinal fasciculus was observed. Decrease in fractional anisotropy of the right superior longitudinal fasciculus terminal was significantly correlated with risk-weighted cumulative exposure.
Zika virus contributes to the development of Guillain-Barré syndrome, according to a study published online ahead of print October 5 in the New England Journal of Medicine. From November 2015 through March 2016, clusters of cases of Guillain-Barré syndrome were observed during an outbreak of Zika virus in Colombia. Researchers characterized the clinical features of 68 patients with Guillain-Barré syndrome during the outbreak and investigated their relationship with Zika virus infection. In all, 97% of patients had symptoms compatible with Zika virus infection before the onset of Guillain-Barré syndrome. Among the 42 patients who had samples tested for Zika virus infection, the results were positive in 40%. Most of the positive results were in urine samples, although three samples of CSF were also positive.
Among patients with amnestic mild cognitive impairment (aMCI), women have better verbal memory than men despite similar levels of brain hypometabolism, according to a study published online ahead of print October 5 in Neurology. In the Alzheimer's Disease Neuroimaging Initiative, 390 controls, 672 participants with aMCI, and 254 people with Alzheimer's disease dementia completed the Rey Auditory Verbal Learning Test and [18F]-fluorodeoxyglucose-PET. Female sex, higher temporal lobe glucose metabolic rates (TLGluMR), and the interaction of the two factors were associated with better verbal memory. The female advantage in verbal memory was greatest in people with moderate to high TLGluMR and minimal or absent among individuals with lower TLGluMR. Diagnosis-stratified analyses revealed that this interaction was driven by the aMCI group.
—Kimberly Williams
Exercise may be associated with a small benefit for elderly people who have memory and thinking problems, according to a study published online ahead of print October 19 in Neurology. Researchers studied 70 adults randomized to six months of aerobic exercise training or usual care plus education on cognitive and everyday function. The aerobic exercise training group had significantly improved Alzheimer's Disease Assessment Scale-Cognitive subscale performance, compared with controls. This difference was not significant at six-month follow-up, however. There were no significant between-group differences at intervention completion and at the six-month follow-up in Executive Interview or Alzheimer's Disease Cooperative Study-Activities of Daily Living performance. Examination of secondary measures showed between-group differences at intervention completion favoring the exercise training program group in six-minute walk distance and in diastolic blood pressure.
The FDA has approved Carnexiv (carbamazepine) injection as a short-term replacement therapy for oral carbamazepine formulations in adults with certain seizure types when oral administration is temporarily not feasible. Carnexiv has received orphan drug designation for this indication and will be the first available IV formulation of carbamazepine. The drug is intended for people with partial seizures with complex symptomatology, generalized tonic-clonic seizures, mixed seizure patterns, or other partial or generalized seizures. Carnexiv is not indicated for the treatment of absence seizures. People taking Carnexiv should not discontinue the drug abruptly because of the risk of seizures, status epilepticus, and other withdrawal signs and symptoms. In addition, Carnexiv should not be used in patients with moderate or severe renal impairment. The drug is marketed by Lundbeck, which is headquartered in Deerfield, Illinois.
Chiropractic spinal manipulative therapy (CSMT) is no more effective than placebo for migraine, according to a study published online ahead of print October 2 in the European Journal of Neurology. Investigators randomized 104 migraineurs with at least one migraine attack per month to CSMT, sham chiropractic, or usual pharmacologic management for 17 months. Migraine days were significantly reduced within all three groups from baseline to post treatment. The effect continued in the CSMT and placebo groups at all follow-up time points, but the control group returned to baseline. The reduction in migraine days was not significantly different between the groups. Migraine duration and headache index were reduced significantly more in the CSMT group than in the control group toward the end of follow-up.
Video monitoring facilitates nocturnal surveillance of patients with epilepsy, but the costs are high, according to a study published online ahead of print September 30 in Epilepsia. For six months, researchers asked caregivers at an epilepsy unit to specify whether an acoustic detection system, bed motion sensor, or video monitoring alerted them to seizures and whether the alerts led to interventions. They identified 1,208 seizures in 37 people. Four people had no nocturnal seizures, and 33% of seizures were seen only on video. In 14% of seizures, including 10% of seizures seen only on video, an intervention was made. The extra costs of monitoring were 7,035 euro per seizure seen only on video and leading to an intervention. The results underscore the need for reliable seizure-detection devices, said the authors.
A higher level of physical activity may not reduce a woman's risk of multiple sclerosis (MS), according to a study published online ahead of print September 28 in Neurology. Researchers calculated total metabolic equivalent hours of physical activity per week for women participating in the Nurses' Health Study (NHS) and NHS II. There were 341 confirmed MS cases with first symptoms after baseline. Participants also reported early-life activity. The investigators analyzed the data with Cox proportional hazards models. Compared with women in the lowest baseline physical activity quartile, women in the highest quartile had a 27% reduced rate of MS. This trend was not present in six-year lagged analyses, however. In NHS II, total early life activity at ages 12 to 22 was not associated with MS.
Youth with primary hypertension have significantly worse performance on neurocognitive testing, compared with normotensive controls, according to a study published online ahead of print September 27 in the Journal of Pediatrics.Seventy-five children with newly diagnosed, untreated hypertension and 75 frequency-matched normotensive controls had baseline neurocognitive testing as part of a prospective multicenter study of cognition in primary hypertension. The participants completed general intelligence, attention, memory, executive function, and processing speed tests. Parents rated participants' executive function and sleep disordered breathing. The study groups were well matched. Hypertension was independently associated with worse memory, attention, and executive function, compared with normotension. Results indicated a significant interaction between disordered sleep and hypertension on ratings of executive function. Hypertension heightened the association between increased disordered sleep and worse executive function.
Headache disorders may be associated with an increased risk for the development of new-onset hypothyroidism, according to a study published online ahead of print September 27 in Headache. This longitudinal retrospective cohort study used data from 8,412 participants enrolled in the Fernald Medical Monitoring Program. Participants underwent physical examinations and thyroid function testing every three years during the 20-year program. The primary outcome measure was new-onset hypothyroidism, defined as the initiation of thyroid replacement therapy or thyroid-stimulating hormone test value greater than or equal to 10 without thyroid medication. Headache disorders were present in about 26% of the participants, and new-onset hypothyroidism developed in approximately 7% of participants. The hazard ratio for the development of new-onset hypothyroidism was 1.21 for people with headache disorders.
People with epilepsy can face various psychosocial adversities and extensively report feeling discriminated against, compared with the general population, according to a study published online ahead of print September 16 in Epilepsia. The Adult Psychiatric Morbidity Survey 2007 included comprehensive interviews with 7,403 people. Overall, people with epilepsy were sevenfold more likely to have reported experiencing discrimination due to health problems than the general population without epilepsy. People with epilepsy also had greater odds of experiencing domestic violence and sexual abuse than the general population, although these associations were also found in people with other chronic conditions. There was less evidence of an association between epilepsy and a history of physical abuse or having a greater burden of other stressful life events.
Short episodes of atrial tachycardia or fibrillation are not associated with increased risk of clinical events, compared with absence of these episodes, according to a study published October 18 in Circulation. The Registry of Atrial Tachycardia and Atrial Fibrillation Episodes enrolled 5,379 patients with pacemakers or implantable cardioverter defibrillators. There were 478 hospitalizations among 342 patients for clinical events. Study authors adjudicated 37,531 electrograms. Patients with clinical events were more likely than those without them to have long atrial tachycardia or fibrillation. Only short episodes of atrial tachycardia or fibrillation were documented in 9% of patients with pacemakers and in 16% of patients with implantable cardioverter defibrillators. Patients with clinical events were no more likely than those without them to have short atrial tachycardia or fibrillation.
A brain signature identifies patients with fibromyalgia with 93% accuracy, according to a study published online ahead of print August 31 in Pain. Researchers examined 37 patients with fibromyalgia and 35 matched healthy controls. They analyzed participants' functional MRI responses to painful pressure and nonpainful multisensory stimulation. Investigators used machine-learning techniques to identify a brain-based fibromyalgia signature. When exposed to the same painful stimuli, patients with fibromyalgia had greater Neurologic Pain Signature responses. Furthermore, a new pain-related classifier revealed augmented responses in sensory integration and self-referential regions in fibromyalgia, and reduced responses in the lateral frontal cortex. Combined activity in the Neurologic Pain Signature, fibromyalgia pain, and multisensory patterns classified patients vs. controls with 92% sensitivity and 94% specificity in individuals who were not part of the study sample.
Children have measurable brain changes after a single season of youth football, even when they do not sustain a concussion, according to a study published online ahead of print October 24 in Radiology. Head impact data were recorded using the Head Impact Telemetry system and quantified as the combined-probability risk-weighted cumulative exposure. Twenty-five male participants were evaluated for seasonal fractional anisotropy changes in the inferior fronto-occipital fasciculus, inferior longitudinal fasciculus, and superior longitudinal fasciculus. There were statistically significant linear relationships between risk-weighted cumulative exposure and decreased fractional anisotropy in the whole, core, and terminals of the left inferior fronto-occipital fasciculus. A trend toward statistical significance in the right superior longitudinal fasciculus was observed. Decrease in fractional anisotropy of the right superior longitudinal fasciculus terminal was significantly correlated with risk-weighted cumulative exposure.
Zika virus contributes to the development of Guillain-Barré syndrome, according to a study published online ahead of print October 5 in the New England Journal of Medicine. From November 2015 through March 2016, clusters of cases of Guillain-Barré syndrome were observed during an outbreak of Zika virus in Colombia. Researchers characterized the clinical features of 68 patients with Guillain-Barré syndrome during the outbreak and investigated their relationship with Zika virus infection. In all, 97% of patients had symptoms compatible with Zika virus infection before the onset of Guillain-Barré syndrome. Among the 42 patients who had samples tested for Zika virus infection, the results were positive in 40%. Most of the positive results were in urine samples, although three samples of CSF were also positive.
Among patients with amnestic mild cognitive impairment (aMCI), women have better verbal memory than men despite similar levels of brain hypometabolism, according to a study published online ahead of print October 5 in Neurology. In the Alzheimer's Disease Neuroimaging Initiative, 390 controls, 672 participants with aMCI, and 254 people with Alzheimer's disease dementia completed the Rey Auditory Verbal Learning Test and [18F]-fluorodeoxyglucose-PET. Female sex, higher temporal lobe glucose metabolic rates (TLGluMR), and the interaction of the two factors were associated with better verbal memory. The female advantage in verbal memory was greatest in people with moderate to high TLGluMR and minimal or absent among individuals with lower TLGluMR. Diagnosis-stratified analyses revealed that this interaction was driven by the aMCI group.
—Kimberly Williams
Finding a Better Approach to Diagnosing Abnormal Uterine Bleeding
Click here to download the PDF.
Despite advances in diagnostic medicine, the evaluation of abnormal uterine bleeding (AUB) remains a challenge for physicians. In this supplement, learn about:
- Pathophysiology and differential diagnosis of AUB
- The limitations of blind endometrial biopsy
- The differences between diagnostic hysteroscopy options
Author
Steven R. Goldstein, MD
Professor of Obstetrics and Gynecology
New York University School of Medicine
Immediate Past President
American Institute of Ultrasound in Medicine
Director of Gynecologic Ultrasound and Co-Director of Bone Densitometry
New York University Medical Center
New York, New York
DISCLOSURES
Dr. Goldstein discloses that he is a paid consultant for CooperSurgical.
Click here to download the PDF.
Despite advances in diagnostic medicine, the evaluation of abnormal uterine bleeding (AUB) remains a challenge for physicians. In this supplement, learn about:
- Pathophysiology and differential diagnosis of AUB
- The limitations of blind endometrial biopsy
- The differences between diagnostic hysteroscopy options
Author
Steven R. Goldstein, MD
Professor of Obstetrics and Gynecology
New York University School of Medicine
Immediate Past President
American Institute of Ultrasound in Medicine
Director of Gynecologic Ultrasound and Co-Director of Bone Densitometry
New York University Medical Center
New York, New York
DISCLOSURES
Dr. Goldstein discloses that he is a paid consultant for CooperSurgical.
Click here to download the PDF.
Despite advances in diagnostic medicine, the evaluation of abnormal uterine bleeding (AUB) remains a challenge for physicians. In this supplement, learn about:
- Pathophysiology and differential diagnosis of AUB
- The limitations of blind endometrial biopsy
- The differences between diagnostic hysteroscopy options
Author
Steven R. Goldstein, MD
Professor of Obstetrics and Gynecology
New York University School of Medicine
Immediate Past President
American Institute of Ultrasound in Medicine
Director of Gynecologic Ultrasound and Co-Director of Bone Densitometry
New York University Medical Center
New York, New York
DISCLOSURES
Dr. Goldstein discloses that he is a paid consultant for CooperSurgical.
AATS Submission Opportunities
Don’t miss the opportunity to submit to one of these AATS scholarship programs.
Deadline: January 20, 2017
AATS Member for a Day
North American medical students, and general and up to third year integrated CT Surgery
(I-6) surgery residents can accompany an AATS Member during portions of the AATS Centennial as an AATS Member for a Day.
The meeting takes place April 29-May 3, 2017 in Boston, MA.
Those selected will receive free hotel accommodations for three to four night in an AATS Centennial hotel. They will also be given a $250 meal and $500 travel stipend at the end of the meeting.
Eligibility/More information
Summer Internship Opportunity for First/Second Year Medical Students
First and second year medical students can spend the summer being exposed to
cardiothoracic surgery thanks to the AATS Summer Intern Scholarship. For eight weeks
(June – September), students will work in the CT department of an AATS member.
Those chosen receive $2,500 for living expenses. They also will be able to attend the AATS Centennial gratis.
The meeting takes place April 29 – May 3, 2017
Boston, MA.
AATS Resident Poster Competition
International cardiothoracic surgery residents and/or congenital heart surgery fellows: Take advantage of this opportunity to represent your institution and present a scientific poster of your clinical/investigative research at The AATS Centennial.
The meeting will take place April 29 - May 3, 2017
Boston, MA.
Awardee institutions get a $500 stipend to offset meal/travel costs. Each winner receives free registration to the AATS Centennial and access to the Skills Course (April 30) and Postgraduate Course (May 1).
Non-MD CT Surgical Team Scientific Poster Competition
Non-MD cardiothoracic team professionals can submit a scientific poster for
the Perioperative/Team-Based Care Poster Competition.
Winning posters will be displayed at the AATS Centennial, April 29 – May 3, 2017
Boston, MA.
The competition winner will receive a $1,000 stipend to offset travel and accommodation costs.
Share:
Don’t miss the opportunity to submit to one of these AATS scholarship programs.
Deadline: January 20, 2017
AATS Member for a Day
North American medical students, and general and up to third year integrated CT Surgery
(I-6) surgery residents can accompany an AATS Member during portions of the AATS Centennial as an AATS Member for a Day.
The meeting takes place April 29-May 3, 2017 in Boston, MA.
Those selected will receive free hotel accommodations for three to four night in an AATS Centennial hotel. They will also be given a $250 meal and $500 travel stipend at the end of the meeting.
Eligibility/More information
Summer Internship Opportunity for First/Second Year Medical Students
First and second year medical students can spend the summer being exposed to
cardiothoracic surgery thanks to the AATS Summer Intern Scholarship. For eight weeks
(June – September), students will work in the CT department of an AATS member.
Those chosen receive $2,500 for living expenses. They also will be able to attend the AATS Centennial gratis.
The meeting takes place April 29 – May 3, 2017
Boston, MA.
AATS Resident Poster Competition
International cardiothoracic surgery residents and/or congenital heart surgery fellows: Take advantage of this opportunity to represent your institution and present a scientific poster of your clinical/investigative research at The AATS Centennial.
The meeting will take place April 29 - May 3, 2017
Boston, MA.
Awardee institutions get a $500 stipend to offset meal/travel costs. Each winner receives free registration to the AATS Centennial and access to the Skills Course (April 30) and Postgraduate Course (May 1).
Non-MD CT Surgical Team Scientific Poster Competition
Non-MD cardiothoracic team professionals can submit a scientific poster for
the Perioperative/Team-Based Care Poster Competition.
Winning posters will be displayed at the AATS Centennial, April 29 – May 3, 2017
Boston, MA.
The competition winner will receive a $1,000 stipend to offset travel and accommodation costs.
Share:
Don’t miss the opportunity to submit to one of these AATS scholarship programs.
Deadline: January 20, 2017
AATS Member for a Day
North American medical students, and general and up to third year integrated CT Surgery
(I-6) surgery residents can accompany an AATS Member during portions of the AATS Centennial as an AATS Member for a Day.
The meeting takes place April 29-May 3, 2017 in Boston, MA.
Those selected will receive free hotel accommodations for three to four night in an AATS Centennial hotel. They will also be given a $250 meal and $500 travel stipend at the end of the meeting.
Eligibility/More information
Summer Internship Opportunity for First/Second Year Medical Students
First and second year medical students can spend the summer being exposed to
cardiothoracic surgery thanks to the AATS Summer Intern Scholarship. For eight weeks
(June – September), students will work in the CT department of an AATS member.
Those chosen receive $2,500 for living expenses. They also will be able to attend the AATS Centennial gratis.
The meeting takes place April 29 – May 3, 2017
Boston, MA.
AATS Resident Poster Competition
International cardiothoracic surgery residents and/or congenital heart surgery fellows: Take advantage of this opportunity to represent your institution and present a scientific poster of your clinical/investigative research at The AATS Centennial.
The meeting will take place April 29 - May 3, 2017
Boston, MA.
Awardee institutions get a $500 stipend to offset meal/travel costs. Each winner receives free registration to the AATS Centennial and access to the Skills Course (April 30) and Postgraduate Course (May 1).
Non-MD CT Surgical Team Scientific Poster Competition
Non-MD cardiothoracic team professionals can submit a scientific poster for
the Perioperative/Team-Based Care Poster Competition.
Winning posters will be displayed at the AATS Centennial, April 29 – May 3, 2017
Boston, MA.
The competition winner will receive a $1,000 stipend to offset travel and accommodation costs.
Share:
AATS Mitral Conclave Call for Abstracts & Videos
AATS invites you to submit your abstracts and videos to the 2017 Mitral Conclave.
AATS Mitral Conclave
April 27-28, 2017
New York, NY
Submission Deadline:
Sunday, January 8, 2017 @ 11.59 pm EST
Share:
AATS invites you to submit your abstracts and videos to the 2017 Mitral Conclave.
AATS Mitral Conclave
April 27-28, 2017
New York, NY
Submission Deadline:
Sunday, January 8, 2017 @ 11.59 pm EST
Share:
AATS invites you to submit your abstracts and videos to the 2017 Mitral Conclave.
AATS Mitral Conclave
April 27-28, 2017
New York, NY
Submission Deadline:
Sunday, January 8, 2017 @ 11.59 pm EST
Share:
Gantenerumab Reduces Levels of Biomarkers Associated With Alzheimer’s Disease
TORONTO—The fully human monoclonal antibody gantenerumab may reduce levels of neurogranin, a postsynaptic degradation marker specific to Alzheimer’s disease, according to a post hoc analysis described at the Alzheimer’s Association International Conference. Gantenerumab, however, does not affect levels of YKL-40, also known as chitinase-3-like protein 1, which is thought to be an inflammation marker mainly derived from astrocytes.
Philip Scheltens, MD, PhD, Director of the Alzheimer Center at the VU University Medical Center in Amsterdam, and colleagues conducted a trial to determine whether gantenerumab would influence dementia severity. The researchers screened people for prodromal Alzheimer’s disease by administering the Free and Cued Selective Reminding Test and measuring their level of CSF amyloid beta-42. They randomized 797 patients to placebo or to 105-mg or 225-mg doses of gantenerumab administered every four weeks by subcutaneous injection. CSF was collected at week 52 for some patients and at week 104 for all patients. A subset of 114 patients underwent amyloid PET. The trial’s primary end point was the Clinical Dementia Rating Scale Sum of Boxes. The study was halted after a futility analysis found no difference between treatment groups.
During the study, the researchers measured levels of total tau, phospho tau, amyloid beta, neurogranin, and YKL-40. Post hoc analysis revealed that total tau tended to increase slightly in the placebo group, remain stable among patients receiving 105 mg of gantenerumab, and decline slightly among people receiving 225 mg of gantenerumab. Differences were significant at both time points.
At week 104, the investigators observed a significant decrease in phospho tau for both doses of gantenerumab. At the same time point, patients receiving the higher dose of gantenerumab had a decrease in neurogranin. “All three biomarkers showed a dose- and time-dependent decrease” following gantenerumab treatment, said Dr. Scheltens. Treatment did not affect levels of amyloid beta or YKL-40, however.
Among patients who underwent amyloid PET, the researchers observed a small and nonsignificant reduction in amyloid beta following treatment with gantenerumab. They noted a correlation between amyloid beta and phospho tau, but not between amyloid beta and total tau. “We do not exactly understand why that is the case,” said Dr. Scheltens.
“These biomarkers are … highly correlated among each other,” and this correlation is specific to Alzheimer’s disease, he added. Patients with Creutzfeldt–Jakob disease or stroke may have large increases in total tau, but not in phospho tau or neurogranin. Furthermore, neurogranin is not elevated in other neurodegenerative diseases such as frontotemporal dementia or dementia with Lewy bodies. “This is a characteristic pattern,” said Dr. Scheltens.
A higher dose of gantenerumab may reduce levels of amyloid beta, and further study of the therapy is needed, Dr. Scheltens concluded.
—Erik Greb
Suggested Reading
Bohrmann B, Baumann K, Benz J, et al. Gantenerumab: a novel human anti-Aβ antibody demonstrates sustained cerebral amyloid-β binding and elicits cell-mediated removal of human amyloid-β. J Alzheimers Dis. 2012;28(1):49-69.
Ostrowitzki S, Deptula D, Thurfjell L, et al. Mechanism of amyloid removal in patients with Alzheimer disease treated with gantenerumab. Arch Neurol. 2012;69(2):198-207.
Panza F, Solfrizzi V, Imbimbo BP, et al. Efficacy and safety studies of gantenerumab in patients with Alzheimer’s disease. Expert Rev Neurother. 2014;14(9):973-986.
TORONTO—The fully human monoclonal antibody gantenerumab may reduce levels of neurogranin, a postsynaptic degradation marker specific to Alzheimer’s disease, according to a post hoc analysis described at the Alzheimer’s Association International Conference. Gantenerumab, however, does not affect levels of YKL-40, also known as chitinase-3-like protein 1, which is thought to be an inflammation marker mainly derived from astrocytes.
Philip Scheltens, MD, PhD, Director of the Alzheimer Center at the VU University Medical Center in Amsterdam, and colleagues conducted a trial to determine whether gantenerumab would influence dementia severity. The researchers screened people for prodromal Alzheimer’s disease by administering the Free and Cued Selective Reminding Test and measuring their level of CSF amyloid beta-42. They randomized 797 patients to placebo or to 105-mg or 225-mg doses of gantenerumab administered every four weeks by subcutaneous injection. CSF was collected at week 52 for some patients and at week 104 for all patients. A subset of 114 patients underwent amyloid PET. The trial’s primary end point was the Clinical Dementia Rating Scale Sum of Boxes. The study was halted after a futility analysis found no difference between treatment groups.
During the study, the researchers measured levels of total tau, phospho tau, amyloid beta, neurogranin, and YKL-40. Post hoc analysis revealed that total tau tended to increase slightly in the placebo group, remain stable among patients receiving 105 mg of gantenerumab, and decline slightly among people receiving 225 mg of gantenerumab. Differences were significant at both time points.
At week 104, the investigators observed a significant decrease in phospho tau for both doses of gantenerumab. At the same time point, patients receiving the higher dose of gantenerumab had a decrease in neurogranin. “All three biomarkers showed a dose- and time-dependent decrease” following gantenerumab treatment, said Dr. Scheltens. Treatment did not affect levels of amyloid beta or YKL-40, however.
Among patients who underwent amyloid PET, the researchers observed a small and nonsignificant reduction in amyloid beta following treatment with gantenerumab. They noted a correlation between amyloid beta and phospho tau, but not between amyloid beta and total tau. “We do not exactly understand why that is the case,” said Dr. Scheltens.
“These biomarkers are … highly correlated among each other,” and this correlation is specific to Alzheimer’s disease, he added. Patients with Creutzfeldt–Jakob disease or stroke may have large increases in total tau, but not in phospho tau or neurogranin. Furthermore, neurogranin is not elevated in other neurodegenerative diseases such as frontotemporal dementia or dementia with Lewy bodies. “This is a characteristic pattern,” said Dr. Scheltens.
A higher dose of gantenerumab may reduce levels of amyloid beta, and further study of the therapy is needed, Dr. Scheltens concluded.
—Erik Greb
Suggested Reading
Bohrmann B, Baumann K, Benz J, et al. Gantenerumab: a novel human anti-Aβ antibody demonstrates sustained cerebral amyloid-β binding and elicits cell-mediated removal of human amyloid-β. J Alzheimers Dis. 2012;28(1):49-69.
Ostrowitzki S, Deptula D, Thurfjell L, et al. Mechanism of amyloid removal in patients with Alzheimer disease treated with gantenerumab. Arch Neurol. 2012;69(2):198-207.
Panza F, Solfrizzi V, Imbimbo BP, et al. Efficacy and safety studies of gantenerumab in patients with Alzheimer’s disease. Expert Rev Neurother. 2014;14(9):973-986.
TORONTO—The fully human monoclonal antibody gantenerumab may reduce levels of neurogranin, a postsynaptic degradation marker specific to Alzheimer’s disease, according to a post hoc analysis described at the Alzheimer’s Association International Conference. Gantenerumab, however, does not affect levels of YKL-40, also known as chitinase-3-like protein 1, which is thought to be an inflammation marker mainly derived from astrocytes.
Philip Scheltens, MD, PhD, Director of the Alzheimer Center at the VU University Medical Center in Amsterdam, and colleagues conducted a trial to determine whether gantenerumab would influence dementia severity. The researchers screened people for prodromal Alzheimer’s disease by administering the Free and Cued Selective Reminding Test and measuring their level of CSF amyloid beta-42. They randomized 797 patients to placebo or to 105-mg or 225-mg doses of gantenerumab administered every four weeks by subcutaneous injection. CSF was collected at week 52 for some patients and at week 104 for all patients. A subset of 114 patients underwent amyloid PET. The trial’s primary end point was the Clinical Dementia Rating Scale Sum of Boxes. The study was halted after a futility analysis found no difference between treatment groups.
During the study, the researchers measured levels of total tau, phospho tau, amyloid beta, neurogranin, and YKL-40. Post hoc analysis revealed that total tau tended to increase slightly in the placebo group, remain stable among patients receiving 105 mg of gantenerumab, and decline slightly among people receiving 225 mg of gantenerumab. Differences were significant at both time points.
At week 104, the investigators observed a significant decrease in phospho tau for both doses of gantenerumab. At the same time point, patients receiving the higher dose of gantenerumab had a decrease in neurogranin. “All three biomarkers showed a dose- and time-dependent decrease” following gantenerumab treatment, said Dr. Scheltens. Treatment did not affect levels of amyloid beta or YKL-40, however.
Among patients who underwent amyloid PET, the researchers observed a small and nonsignificant reduction in amyloid beta following treatment with gantenerumab. They noted a correlation between amyloid beta and phospho tau, but not between amyloid beta and total tau. “We do not exactly understand why that is the case,” said Dr. Scheltens.
“These biomarkers are … highly correlated among each other,” and this correlation is specific to Alzheimer’s disease, he added. Patients with Creutzfeldt–Jakob disease or stroke may have large increases in total tau, but not in phospho tau or neurogranin. Furthermore, neurogranin is not elevated in other neurodegenerative diseases such as frontotemporal dementia or dementia with Lewy bodies. “This is a characteristic pattern,” said Dr. Scheltens.
A higher dose of gantenerumab may reduce levels of amyloid beta, and further study of the therapy is needed, Dr. Scheltens concluded.
—Erik Greb
Suggested Reading
Bohrmann B, Baumann K, Benz J, et al. Gantenerumab: a novel human anti-Aβ antibody demonstrates sustained cerebral amyloid-β binding and elicits cell-mediated removal of human amyloid-β. J Alzheimers Dis. 2012;28(1):49-69.
Ostrowitzki S, Deptula D, Thurfjell L, et al. Mechanism of amyloid removal in patients with Alzheimer disease treated with gantenerumab. Arch Neurol. 2012;69(2):198-207.
Panza F, Solfrizzi V, Imbimbo BP, et al. Efficacy and safety studies of gantenerumab in patients with Alzheimer’s disease. Expert Rev Neurother. 2014;14(9):973-986.