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Comorbidity rates remain stable over 10 years in childhood-onset epilepsy
BALTIMORE – , according to research presented at the annual meeting of the American Epilepsy Society. Compared with controls, however, young adults with childhood-onset epilepsy have higher rates of psychiatric comorbidity.
The findings suggest that “diagnoses that are identified at baseline continue to be a problem over time,” said Jana E. Jones, PhD, associate professor of neuropsychology at the University of Wisconsin in Madison. Although neurologists understand that comorbidities are common among patients with childhood-onset epilepsy, “it would be good for us to continue to learn what factors are influencing this,” she added.
Investigators sought predictors of outcomes at 10 years
Since 2004, Dr. Jones and her colleagues at the University of Wisconsin have been conducting a study of patients with childhood-onset epilepsy. After the population had completed 10 years of follow-up, the researchers analyzed the data to identify potential patterns of medical and psychiatric comorbidities. One question that they sought to answer was whether any baseline factors could predict outcomes at 10 years.
The researchers analyzed data for 53 patients with childhood-onset epilepsy and 55 controls without epilepsy. At baseline, participants were between ages 8 years and 18 years and had no intellectual disability or neurologic impairment. Within 1 year of epilepsy diagnosis, each participant underwent a psychiatric interview based on the Kiddie Schedule for Affective Disorders and Schizophrenia (K-SADS). Ten years later, participants underwent the Composite International Diagnostic Interview (CIDI), a psychiatric interview for adults. Information about medical comorbidities was collected through interviews and record review at baseline and through an online survey at the 10-year follow-up.
Participants’ mean age at baseline was 12 years. Mean IQ was 105 for the epilepsy group and 109 for the control group. At 10 years, participants’ mean age was about 23 years. Among patients with epilepsy, 55% had focal epilepsy, and 42% had generalized epilepsy. About 40% of participants with epilepsy were in remission at 10 years, which Dr. Jones and colleagues defined as having achieved 5 years without taking medications and without having seizures. At 10 years after diagnosis, 51% of patients with epilepsy were not taking any seizure medication, including approximately 11% of patients with epilepsy who were not categorized as in remission. Most patients taking medication were on monotherapy.
Trends in psychiatric and medical comorbidities
At baseline, approximately 75% of children with epilepsy had a psychiatric or medical diagnosis, compared with 40% of controls. At the 10-year follow-up, 62% of children with epilepsy had a psychiatric diagnosis, compared with 35% of controls. Among controls, 4% had a medical comorbidity (i.e., asthma) alone at baseline. Asthma was the most common medical comorbidity at baseline among patients with epilepsy, and other comorbidities included sleep disorder, head injury, and scoliosis. Six percent of patients had a medical comorbidity alone at baseline. The proportion of patients with both psychiatric and medical comorbidity was 8% at baseline. Patients with epilepsy at baseline had an increased risk of psychiatric comorbidity.
At 10 years, the most common medical comorbidity among patients with epilepsy was head injury (18.9%), followed by allergies and asthma. The rate of migraine was about 13% among controls and slightly less in the epilepsy group. Dr. Jones and colleagues found no significant differences in medical comorbidities between groups at 10 years. At that point, the rate of medical comorbidity was 4% among patients and 11% among controls.
The rate of psychiatric comorbidity remained relatively stable over 10 years, said Dr. Jones. Approximately 47% of patients with epilepsy had a psychiatric diagnosis at 10 years, compared with 29% of controls. In addition, 38% of patients with epilepsy had both psychiatric and medical diagnoses, compared with 29% of controls. Epilepsy increased the risk of psychiatric comorbidity at the 10-year follow-up. Neither medications, remission status, nor seizure type predicted any comorbidity at 10 years.
Dr. Jones and colleagues compared comorbidity rates between the study sample and the National Comorbidity Survey Replication (NCS-R), which reported population-based data that included an epilepsy sample. About 47% of the epilepsy group had an anxiety disorder, compared with 40.7% in the NCS-R. The rate of anxiety disorders was higher in the control group (45.5%) than in the control group (30.8%) in the NCS-R. Approximately 26.4% of the population in Dr. Jones’s study had a mood disorder, compared with 25.9% in the National Comorbidity Survey.
Dr. Jones and colleagues are conducting 15-year follow-up of their original population. One question they will examine is whether medical comorbidities will increase in patients with childhood-onset epilepsy as they approach age 30 years.
Two of the investigators received funding in the form of a grant from the National Institutes of Health.
SOURCE: Kesselmayer RF et al. AES 2019. Abstract 1.288.
BALTIMORE – , according to research presented at the annual meeting of the American Epilepsy Society. Compared with controls, however, young adults with childhood-onset epilepsy have higher rates of psychiatric comorbidity.
The findings suggest that “diagnoses that are identified at baseline continue to be a problem over time,” said Jana E. Jones, PhD, associate professor of neuropsychology at the University of Wisconsin in Madison. Although neurologists understand that comorbidities are common among patients with childhood-onset epilepsy, “it would be good for us to continue to learn what factors are influencing this,” she added.
Investigators sought predictors of outcomes at 10 years
Since 2004, Dr. Jones and her colleagues at the University of Wisconsin have been conducting a study of patients with childhood-onset epilepsy. After the population had completed 10 years of follow-up, the researchers analyzed the data to identify potential patterns of medical and psychiatric comorbidities. One question that they sought to answer was whether any baseline factors could predict outcomes at 10 years.
The researchers analyzed data for 53 patients with childhood-onset epilepsy and 55 controls without epilepsy. At baseline, participants were between ages 8 years and 18 years and had no intellectual disability or neurologic impairment. Within 1 year of epilepsy diagnosis, each participant underwent a psychiatric interview based on the Kiddie Schedule for Affective Disorders and Schizophrenia (K-SADS). Ten years later, participants underwent the Composite International Diagnostic Interview (CIDI), a psychiatric interview for adults. Information about medical comorbidities was collected through interviews and record review at baseline and through an online survey at the 10-year follow-up.
Participants’ mean age at baseline was 12 years. Mean IQ was 105 for the epilepsy group and 109 for the control group. At 10 years, participants’ mean age was about 23 years. Among patients with epilepsy, 55% had focal epilepsy, and 42% had generalized epilepsy. About 40% of participants with epilepsy were in remission at 10 years, which Dr. Jones and colleagues defined as having achieved 5 years without taking medications and without having seizures. At 10 years after diagnosis, 51% of patients with epilepsy were not taking any seizure medication, including approximately 11% of patients with epilepsy who were not categorized as in remission. Most patients taking medication were on monotherapy.
Trends in psychiatric and medical comorbidities
At baseline, approximately 75% of children with epilepsy had a psychiatric or medical diagnosis, compared with 40% of controls. At the 10-year follow-up, 62% of children with epilepsy had a psychiatric diagnosis, compared with 35% of controls. Among controls, 4% had a medical comorbidity (i.e., asthma) alone at baseline. Asthma was the most common medical comorbidity at baseline among patients with epilepsy, and other comorbidities included sleep disorder, head injury, and scoliosis. Six percent of patients had a medical comorbidity alone at baseline. The proportion of patients with both psychiatric and medical comorbidity was 8% at baseline. Patients with epilepsy at baseline had an increased risk of psychiatric comorbidity.
At 10 years, the most common medical comorbidity among patients with epilepsy was head injury (18.9%), followed by allergies and asthma. The rate of migraine was about 13% among controls and slightly less in the epilepsy group. Dr. Jones and colleagues found no significant differences in medical comorbidities between groups at 10 years. At that point, the rate of medical comorbidity was 4% among patients and 11% among controls.
The rate of psychiatric comorbidity remained relatively stable over 10 years, said Dr. Jones. Approximately 47% of patients with epilepsy had a psychiatric diagnosis at 10 years, compared with 29% of controls. In addition, 38% of patients with epilepsy had both psychiatric and medical diagnoses, compared with 29% of controls. Epilepsy increased the risk of psychiatric comorbidity at the 10-year follow-up. Neither medications, remission status, nor seizure type predicted any comorbidity at 10 years.
Dr. Jones and colleagues compared comorbidity rates between the study sample and the National Comorbidity Survey Replication (NCS-R), which reported population-based data that included an epilepsy sample. About 47% of the epilepsy group had an anxiety disorder, compared with 40.7% in the NCS-R. The rate of anxiety disorders was higher in the control group (45.5%) than in the control group (30.8%) in the NCS-R. Approximately 26.4% of the population in Dr. Jones’s study had a mood disorder, compared with 25.9% in the National Comorbidity Survey.
Dr. Jones and colleagues are conducting 15-year follow-up of their original population. One question they will examine is whether medical comorbidities will increase in patients with childhood-onset epilepsy as they approach age 30 years.
Two of the investigators received funding in the form of a grant from the National Institutes of Health.
SOURCE: Kesselmayer RF et al. AES 2019. Abstract 1.288.
BALTIMORE – , according to research presented at the annual meeting of the American Epilepsy Society. Compared with controls, however, young adults with childhood-onset epilepsy have higher rates of psychiatric comorbidity.
The findings suggest that “diagnoses that are identified at baseline continue to be a problem over time,” said Jana E. Jones, PhD, associate professor of neuropsychology at the University of Wisconsin in Madison. Although neurologists understand that comorbidities are common among patients with childhood-onset epilepsy, “it would be good for us to continue to learn what factors are influencing this,” she added.
Investigators sought predictors of outcomes at 10 years
Since 2004, Dr. Jones and her colleagues at the University of Wisconsin have been conducting a study of patients with childhood-onset epilepsy. After the population had completed 10 years of follow-up, the researchers analyzed the data to identify potential patterns of medical and psychiatric comorbidities. One question that they sought to answer was whether any baseline factors could predict outcomes at 10 years.
The researchers analyzed data for 53 patients with childhood-onset epilepsy and 55 controls without epilepsy. At baseline, participants were between ages 8 years and 18 years and had no intellectual disability or neurologic impairment. Within 1 year of epilepsy diagnosis, each participant underwent a psychiatric interview based on the Kiddie Schedule for Affective Disorders and Schizophrenia (K-SADS). Ten years later, participants underwent the Composite International Diagnostic Interview (CIDI), a psychiatric interview for adults. Information about medical comorbidities was collected through interviews and record review at baseline and through an online survey at the 10-year follow-up.
Participants’ mean age at baseline was 12 years. Mean IQ was 105 for the epilepsy group and 109 for the control group. At 10 years, participants’ mean age was about 23 years. Among patients with epilepsy, 55% had focal epilepsy, and 42% had generalized epilepsy. About 40% of participants with epilepsy were in remission at 10 years, which Dr. Jones and colleagues defined as having achieved 5 years without taking medications and without having seizures. At 10 years after diagnosis, 51% of patients with epilepsy were not taking any seizure medication, including approximately 11% of patients with epilepsy who were not categorized as in remission. Most patients taking medication were on monotherapy.
Trends in psychiatric and medical comorbidities
At baseline, approximately 75% of children with epilepsy had a psychiatric or medical diagnosis, compared with 40% of controls. At the 10-year follow-up, 62% of children with epilepsy had a psychiatric diagnosis, compared with 35% of controls. Among controls, 4% had a medical comorbidity (i.e., asthma) alone at baseline. Asthma was the most common medical comorbidity at baseline among patients with epilepsy, and other comorbidities included sleep disorder, head injury, and scoliosis. Six percent of patients had a medical comorbidity alone at baseline. The proportion of patients with both psychiatric and medical comorbidity was 8% at baseline. Patients with epilepsy at baseline had an increased risk of psychiatric comorbidity.
At 10 years, the most common medical comorbidity among patients with epilepsy was head injury (18.9%), followed by allergies and asthma. The rate of migraine was about 13% among controls and slightly less in the epilepsy group. Dr. Jones and colleagues found no significant differences in medical comorbidities between groups at 10 years. At that point, the rate of medical comorbidity was 4% among patients and 11% among controls.
The rate of psychiatric comorbidity remained relatively stable over 10 years, said Dr. Jones. Approximately 47% of patients with epilepsy had a psychiatric diagnosis at 10 years, compared with 29% of controls. In addition, 38% of patients with epilepsy had both psychiatric and medical diagnoses, compared with 29% of controls. Epilepsy increased the risk of psychiatric comorbidity at the 10-year follow-up. Neither medications, remission status, nor seizure type predicted any comorbidity at 10 years.
Dr. Jones and colleagues compared comorbidity rates between the study sample and the National Comorbidity Survey Replication (NCS-R), which reported population-based data that included an epilepsy sample. About 47% of the epilepsy group had an anxiety disorder, compared with 40.7% in the NCS-R. The rate of anxiety disorders was higher in the control group (45.5%) than in the control group (30.8%) in the NCS-R. Approximately 26.4% of the population in Dr. Jones’s study had a mood disorder, compared with 25.9% in the National Comorbidity Survey.
Dr. Jones and colleagues are conducting 15-year follow-up of their original population. One question they will examine is whether medical comorbidities will increase in patients with childhood-onset epilepsy as they approach age 30 years.
Two of the investigators received funding in the form of a grant from the National Institutes of Health.
SOURCE: Kesselmayer RF et al. AES 2019. Abstract 1.288.
REPORTING FROM AES 2019
FDA approves diazepam nasal spray for seizure clusters
The drug may be administered by a care partner outside of a medical setting for the treatment of intermittent, stereotypic episodes of frequent seizure activity that are distinct from a patient’s usual seizure pattern. The formulation is the first nasal spray approved by the FDA as a rescue treatment for people with epilepsy aged 6 years and older, according to Neurelis, the developer of the drug. Midazolam nasal spray, approved in May 2019, is indicated for patients with epilepsy aged 12 years and older.
Investigators evaluated the safety of diazepam nasal spray in a long-term, open-label, repeat-dose, clinical trial. The study enrolled 130 patients aged 6 years and older; more than 2,000 seizures were treated. The drug generally was safe and well tolerated, and the most common adverse reactions were somnolence, headache, and nasal discomfort.
The FDA has granted Valtoco 7 years of orphan drug exclusivity. In the United States, about 170,000 patients with epilepsy are at risk of cluster or acute repetitive seizures, the company said. Until recently, approved rescue medications had been rectally administered.
Patients may receive a second dose of diazepam nasal spray at least 4 hours after an initial dose if needed, but caregivers should not use more than two doses to treat a single episode, according to the prescribing information. In addition, the prescribing information recommends that diazepam nasal spray be used for no more than one episode every 5 days and no more than five episodes per month.
The drug may be administered by a care partner outside of a medical setting for the treatment of intermittent, stereotypic episodes of frequent seizure activity that are distinct from a patient’s usual seizure pattern. The formulation is the first nasal spray approved by the FDA as a rescue treatment for people with epilepsy aged 6 years and older, according to Neurelis, the developer of the drug. Midazolam nasal spray, approved in May 2019, is indicated for patients with epilepsy aged 12 years and older.
Investigators evaluated the safety of diazepam nasal spray in a long-term, open-label, repeat-dose, clinical trial. The study enrolled 130 patients aged 6 years and older; more than 2,000 seizures were treated. The drug generally was safe and well tolerated, and the most common adverse reactions were somnolence, headache, and nasal discomfort.
The FDA has granted Valtoco 7 years of orphan drug exclusivity. In the United States, about 170,000 patients with epilepsy are at risk of cluster or acute repetitive seizures, the company said. Until recently, approved rescue medications had been rectally administered.
Patients may receive a second dose of diazepam nasal spray at least 4 hours after an initial dose if needed, but caregivers should not use more than two doses to treat a single episode, according to the prescribing information. In addition, the prescribing information recommends that diazepam nasal spray be used for no more than one episode every 5 days and no more than five episodes per month.
The drug may be administered by a care partner outside of a medical setting for the treatment of intermittent, stereotypic episodes of frequent seizure activity that are distinct from a patient’s usual seizure pattern. The formulation is the first nasal spray approved by the FDA as a rescue treatment for people with epilepsy aged 6 years and older, according to Neurelis, the developer of the drug. Midazolam nasal spray, approved in May 2019, is indicated for patients with epilepsy aged 12 years and older.
Investigators evaluated the safety of diazepam nasal spray in a long-term, open-label, repeat-dose, clinical trial. The study enrolled 130 patients aged 6 years and older; more than 2,000 seizures were treated. The drug generally was safe and well tolerated, and the most common adverse reactions were somnolence, headache, and nasal discomfort.
The FDA has granted Valtoco 7 years of orphan drug exclusivity. In the United States, about 170,000 patients with epilepsy are at risk of cluster or acute repetitive seizures, the company said. Until recently, approved rescue medications had been rectally administered.
Patients may receive a second dose of diazepam nasal spray at least 4 hours after an initial dose if needed, but caregivers should not use more than two doses to treat a single episode, according to the prescribing information. In addition, the prescribing information recommends that diazepam nasal spray be used for no more than one episode every 5 days and no more than five episodes per month.
AED exposure from breastfeeding appears to be low
, according to a study published online ahead of print Dec. 30, 2019, in JAMA Neurology. The results may explain why previous research failed to find adverse neurodevelopmental effects of breastfeeding in infants whose mothers are undergoing AED treatment, said the authors.
“The results of this study add support to the general safety of breastfeeding by mothers with epilepsy who take AEDs,” wrote Angela K. Birnbaum, PhD, professor of experimental and clinical pharmacology at the University of Minnesota in Minneapolis, and colleagues.
Investigators measured infants’ blood AED concentrations
To date, medical consensus about the safety of breastfeeding while the mother is taking AEDs has been elusive. Researchers have investigated breast milk concentrations of AEDs as surrogate markers of AED concentrations in children. Breast milk concentrations, however, do not account for differences in infant pharmacokinetic processes and thus could misrepresent AED exposure in children through breastfeeding.
Dr. Birnbaum and colleagues sought to measure blood concentrations of AEDs in mothers with epilepsy and the infants that they breastfed to achieve an objective measure of AED exposure through breastfeeding. They examined data collected from December 2012 to October 2016 in the prospective Maternal Outcomes and Neurodevelopmental Effects of Antiepileptic Drugs (MONEAD) study. Eligible participants were pregnant women with epilepsy between the ages of 14 and 45 years whose pregnancies had progressed to fewer than 20 weeks’ gestational age and who had IQ scores greater than 70 points. Participants were followed up throughout pregnancy and for 9 months post partum. Children were enrolled at birth.
The investigators collected blood samples from mothers and infants who were breastfed at the same visit, which occurred at between 5 and 20 weeks after birth. The volume of ingested breast milk delivered through graduated feeding bottles each day and the total duration of all daily breastfeeding sessions were recorded. For infants, blood samples were collected from the plantar surface of the heel and stored as dried blood spots on filter paper. The study’s primary endpoint was the percentage of infant-to-mother concentration of AEDs. Concentrations of AEDs in infants at less than the lower limit of quantification were assessed as half of the lower limit.
Exposure in utero may be greater than exposure through breast milk
In all, the researchers enrolled 351 pregnant women with epilepsy into the study and collected data on 345 infants. Two hundred twenty-two (64.3%) of the infants were breastfed, and 146 (42.3%) had AED concentrations available. After excluding outliers and mothers with missing concentration data, Dr. Birnbaum and colleagues included 164 matching infant-mother concentration pairs in their analysis (i.e., of 135 mothers and 138 infants). Approximately 52% of the infants were female, and their median age at blood collection was 13 weeks. The mothers’ median age was 32 years. About 82% of mothers were receiving monotherapy. The investigators found no demographic differences between groups of mothers taking various AEDs.
Sixty-eight infants (49.3%) had AED concentrations that were less than the lower limit of quantification. AED concentration was not greater than the lower limit of quantification for any infants breastfed by mothers taking carbamazepine, oxcarbazepine, valproic acid, or topiramate. Most levetiracetam (71.4%) and zonisamide (60.0%) concentrations in infants were less than the lower limit of quantification. Most lamotrigine concentrations in infants (88.6%) were greater than the lower limit of quantification.
The median percentage of infant-to-mother concentration was 28.9% for lamotrigine, 5.3% for levetiracetam, 44.2% for zonisamide, 5.7% for carbamazepine, 5.4% for carbamazepine epoxide, 0.3% for oxcarbazepine, 17.2% for topiramate, and 21.4% for valproic acid. Multiple linear regression models indicated that maternal concentration was significantly associated with lamotrigine concentration in infants, but not levetiracetam concentration in infants.
“Prior studies at delivery demonstrated that umbilical-cord concentrations were nearly equal to maternal concentrations, suggesting extensive placental passage to the fetus,” wrote Dr. Birnbaum and colleagues. “Therefore, the amount of AED exposure via breast milk is likely substantially lower than fetal exposure during pregnancy and appears unlikely to confer any additional risks beyond those that might be associated with exposure in pregnancy, especially given prior studies showing no adverse neurodevelopmental effects of breastfeeding while taking AEDs.”
The investigators acknowledged several limitations of their research, including the observational design of the MONEAD study. The amount of AED in participants’ breast milk is unknown, and the investigators could not calculate relative infant dosages. Only one blood sample was taken per infant, thus the results may not reflect infants’ total exposure over time.
The National Institute of Neurological Disorders and Stroke and the National Institute of Child Health and Development funded the research. The authors reported receiving research support from various pharmaceutical companies.
SOURCE: Birnbaum AK et al. JAMA Neurol. 2019 Dec 30. doi: 10.1001/jamaneurol.2019.4443.
, according to a study published online ahead of print Dec. 30, 2019, in JAMA Neurology. The results may explain why previous research failed to find adverse neurodevelopmental effects of breastfeeding in infants whose mothers are undergoing AED treatment, said the authors.
“The results of this study add support to the general safety of breastfeeding by mothers with epilepsy who take AEDs,” wrote Angela K. Birnbaum, PhD, professor of experimental and clinical pharmacology at the University of Minnesota in Minneapolis, and colleagues.
Investigators measured infants’ blood AED concentrations
To date, medical consensus about the safety of breastfeeding while the mother is taking AEDs has been elusive. Researchers have investigated breast milk concentrations of AEDs as surrogate markers of AED concentrations in children. Breast milk concentrations, however, do not account for differences in infant pharmacokinetic processes and thus could misrepresent AED exposure in children through breastfeeding.
Dr. Birnbaum and colleagues sought to measure blood concentrations of AEDs in mothers with epilepsy and the infants that they breastfed to achieve an objective measure of AED exposure through breastfeeding. They examined data collected from December 2012 to October 2016 in the prospective Maternal Outcomes and Neurodevelopmental Effects of Antiepileptic Drugs (MONEAD) study. Eligible participants were pregnant women with epilepsy between the ages of 14 and 45 years whose pregnancies had progressed to fewer than 20 weeks’ gestational age and who had IQ scores greater than 70 points. Participants were followed up throughout pregnancy and for 9 months post partum. Children were enrolled at birth.
The investigators collected blood samples from mothers and infants who were breastfed at the same visit, which occurred at between 5 and 20 weeks after birth. The volume of ingested breast milk delivered through graduated feeding bottles each day and the total duration of all daily breastfeeding sessions were recorded. For infants, blood samples were collected from the plantar surface of the heel and stored as dried blood spots on filter paper. The study’s primary endpoint was the percentage of infant-to-mother concentration of AEDs. Concentrations of AEDs in infants at less than the lower limit of quantification were assessed as half of the lower limit.
Exposure in utero may be greater than exposure through breast milk
In all, the researchers enrolled 351 pregnant women with epilepsy into the study and collected data on 345 infants. Two hundred twenty-two (64.3%) of the infants were breastfed, and 146 (42.3%) had AED concentrations available. After excluding outliers and mothers with missing concentration data, Dr. Birnbaum and colleagues included 164 matching infant-mother concentration pairs in their analysis (i.e., of 135 mothers and 138 infants). Approximately 52% of the infants were female, and their median age at blood collection was 13 weeks. The mothers’ median age was 32 years. About 82% of mothers were receiving monotherapy. The investigators found no demographic differences between groups of mothers taking various AEDs.
Sixty-eight infants (49.3%) had AED concentrations that were less than the lower limit of quantification. AED concentration was not greater than the lower limit of quantification for any infants breastfed by mothers taking carbamazepine, oxcarbazepine, valproic acid, or topiramate. Most levetiracetam (71.4%) and zonisamide (60.0%) concentrations in infants were less than the lower limit of quantification. Most lamotrigine concentrations in infants (88.6%) were greater than the lower limit of quantification.
The median percentage of infant-to-mother concentration was 28.9% for lamotrigine, 5.3% for levetiracetam, 44.2% for zonisamide, 5.7% for carbamazepine, 5.4% for carbamazepine epoxide, 0.3% for oxcarbazepine, 17.2% for topiramate, and 21.4% for valproic acid. Multiple linear regression models indicated that maternal concentration was significantly associated with lamotrigine concentration in infants, but not levetiracetam concentration in infants.
“Prior studies at delivery demonstrated that umbilical-cord concentrations were nearly equal to maternal concentrations, suggesting extensive placental passage to the fetus,” wrote Dr. Birnbaum and colleagues. “Therefore, the amount of AED exposure via breast milk is likely substantially lower than fetal exposure during pregnancy and appears unlikely to confer any additional risks beyond those that might be associated with exposure in pregnancy, especially given prior studies showing no adverse neurodevelopmental effects of breastfeeding while taking AEDs.”
The investigators acknowledged several limitations of their research, including the observational design of the MONEAD study. The amount of AED in participants’ breast milk is unknown, and the investigators could not calculate relative infant dosages. Only one blood sample was taken per infant, thus the results may not reflect infants’ total exposure over time.
The National Institute of Neurological Disorders and Stroke and the National Institute of Child Health and Development funded the research. The authors reported receiving research support from various pharmaceutical companies.
SOURCE: Birnbaum AK et al. JAMA Neurol. 2019 Dec 30. doi: 10.1001/jamaneurol.2019.4443.
, according to a study published online ahead of print Dec. 30, 2019, in JAMA Neurology. The results may explain why previous research failed to find adverse neurodevelopmental effects of breastfeeding in infants whose mothers are undergoing AED treatment, said the authors.
“The results of this study add support to the general safety of breastfeeding by mothers with epilepsy who take AEDs,” wrote Angela K. Birnbaum, PhD, professor of experimental and clinical pharmacology at the University of Minnesota in Minneapolis, and colleagues.
Investigators measured infants’ blood AED concentrations
To date, medical consensus about the safety of breastfeeding while the mother is taking AEDs has been elusive. Researchers have investigated breast milk concentrations of AEDs as surrogate markers of AED concentrations in children. Breast milk concentrations, however, do not account for differences in infant pharmacokinetic processes and thus could misrepresent AED exposure in children through breastfeeding.
Dr. Birnbaum and colleagues sought to measure blood concentrations of AEDs in mothers with epilepsy and the infants that they breastfed to achieve an objective measure of AED exposure through breastfeeding. They examined data collected from December 2012 to October 2016 in the prospective Maternal Outcomes and Neurodevelopmental Effects of Antiepileptic Drugs (MONEAD) study. Eligible participants were pregnant women with epilepsy between the ages of 14 and 45 years whose pregnancies had progressed to fewer than 20 weeks’ gestational age and who had IQ scores greater than 70 points. Participants were followed up throughout pregnancy and for 9 months post partum. Children were enrolled at birth.
The investigators collected blood samples from mothers and infants who were breastfed at the same visit, which occurred at between 5 and 20 weeks after birth. The volume of ingested breast milk delivered through graduated feeding bottles each day and the total duration of all daily breastfeeding sessions were recorded. For infants, blood samples were collected from the plantar surface of the heel and stored as dried blood spots on filter paper. The study’s primary endpoint was the percentage of infant-to-mother concentration of AEDs. Concentrations of AEDs in infants at less than the lower limit of quantification were assessed as half of the lower limit.
Exposure in utero may be greater than exposure through breast milk
In all, the researchers enrolled 351 pregnant women with epilepsy into the study and collected data on 345 infants. Two hundred twenty-two (64.3%) of the infants were breastfed, and 146 (42.3%) had AED concentrations available. After excluding outliers and mothers with missing concentration data, Dr. Birnbaum and colleagues included 164 matching infant-mother concentration pairs in their analysis (i.e., of 135 mothers and 138 infants). Approximately 52% of the infants were female, and their median age at blood collection was 13 weeks. The mothers’ median age was 32 years. About 82% of mothers were receiving monotherapy. The investigators found no demographic differences between groups of mothers taking various AEDs.
Sixty-eight infants (49.3%) had AED concentrations that were less than the lower limit of quantification. AED concentration was not greater than the lower limit of quantification for any infants breastfed by mothers taking carbamazepine, oxcarbazepine, valproic acid, or topiramate. Most levetiracetam (71.4%) and zonisamide (60.0%) concentrations in infants were less than the lower limit of quantification. Most lamotrigine concentrations in infants (88.6%) were greater than the lower limit of quantification.
The median percentage of infant-to-mother concentration was 28.9% for lamotrigine, 5.3% for levetiracetam, 44.2% for zonisamide, 5.7% for carbamazepine, 5.4% for carbamazepine epoxide, 0.3% for oxcarbazepine, 17.2% for topiramate, and 21.4% for valproic acid. Multiple linear regression models indicated that maternal concentration was significantly associated with lamotrigine concentration in infants, but not levetiracetam concentration in infants.
“Prior studies at delivery demonstrated that umbilical-cord concentrations were nearly equal to maternal concentrations, suggesting extensive placental passage to the fetus,” wrote Dr. Birnbaum and colleagues. “Therefore, the amount of AED exposure via breast milk is likely substantially lower than fetal exposure during pregnancy and appears unlikely to confer any additional risks beyond those that might be associated with exposure in pregnancy, especially given prior studies showing no adverse neurodevelopmental effects of breastfeeding while taking AEDs.”
The investigators acknowledged several limitations of their research, including the observational design of the MONEAD study. The amount of AED in participants’ breast milk is unknown, and the investigators could not calculate relative infant dosages. Only one blood sample was taken per infant, thus the results may not reflect infants’ total exposure over time.
The National Institute of Neurological Disorders and Stroke and the National Institute of Child Health and Development funded the research. The authors reported receiving research support from various pharmaceutical companies.
SOURCE: Birnbaum AK et al. JAMA Neurol. 2019 Dec 30. doi: 10.1001/jamaneurol.2019.4443.
FROM JAMA NEUROLOGY
EEG surveillance, preseizure treatment prevents TSC epilepsy, cognitive loss
BALTIMORE – Monitoring children who have tuberous sclerosis with EEG and treating them with vigabatrin (Sabril) at the first sign of preseizure abnormalities, rather than the usual practice of no surveillance and waiting until they have seizures, prevents epilepsy and cognitive decline, according to European investigators.
Early surveillance is recommended and standard practice in Europe. That’s not the case in the United States, but might be someday pending the results of the PREVENT trial (Preventing Epilepsy Using Vigabatrin In Infants With Tuberous Sclerosis Complex), an ongoing, National Institute of Neurological Disorders and Stroke–funded study to confirm the European findings.
“We are trying to convince doctors” in the United States and other “countries to do this. If you are not convinced to do early treatment,” at least “do surveillance with EEG. You will diagnose epilepsy earlier, and treat earlier, and children will do much better,” said Sergiusz Jozwiak, MD, PhD, head of pediatric neurology at Warsaw Medical University and recipient of an award from the U.S. Tuberous Sclerosis Alliance for his pioneering work.
Some U.S. physicians are already doing preventive treatment, but it’s hit and miss. “We are talking about monitoring children below the age of 2 years,” when seizures are associated with cognitive decline, he noted at the annual meeting of the American Epilepsy Society.
Dr. Jozwiak presented a follow-up at the meeting to his 2011 investigation, the first prevention study in tuberous sclerosis. Fourteen infants diagnosed within 2 months of birth underwent video-EEG monitoring every 4-6 weeks until age 2 years and were treated with vigabatrin 100-150 mg/kg per day when multifocal epileptiform discharges – a sign of impending seizures – were detected. Outcomes were compared with infants treated traditionally, with no EEG monitoring and vigabatrin only after they seized.
The children are about 9 years old now; the median IQ in the prevention arm is 94 versus 46 in the control group (P less than .03). Seven of the 14 prevention children (50%) never had a clinical seizure, while all but 1 of 25 (96%) in the control arm did (P = .001). Six of 11 prevention children (55%) versus 4 of 24 in the control group (17%), were able to come off antiepileptic drugs altogether, with no seizures (P less than .03). The work was published shortly before the epilepsy meeting.
The original 2011 report, which had similarly favorable outcomes when the children were 2 years old, led directly to the EpiStop trial, conducted at 16 mostly European centers and also reported at the meeting. Dr. Jozwiak was the senior investigator.
The design was different; all of the infants had EEG monitoring every 4 weeks until month 6, then every 6 weeks until age 12 months, then every 2 months until age 2 years. At the first detection of multifocal epileptiform discharges, infants were randomized 1:1 to vigabatrin or to the control group, with further monitoring followed by vigabatrin at the first seizure on EEG or first clinical seizure. An additional group of children – the open-label arm – also had EEG monitoring, but when to start vigabatrin was left up to the study site.
Only 50 of the original 94 children completed the trial to the full 2 years; tuberous sclerosis comorbidities drove many of them out, said lead investigator Katarzyna Kotulska-Jozwiak, MD, PhD, head of neurology at Children’s Memorial Health Institute, Warsaw.
Even so, the 25 children treated preventively in the randomized and open-label cohorts were more than three times as likely to be seizure free at 2 years (P = .01), and 74% less likely to develop drug-resistant epilepsy (P = .013). None of the prevention children developed infantile spasms versus 10 controls (40%) treated at first clinical or EEG seizure.
The incidence of neurodevelopmental delay was 34%, and autism 33%, at 24 months, and did not differ between prevention and control subjects. It’s probably because even children in the control group benefited from EEG surveillance and early treatment, the investigators said.
Historically, the rate of intellectual disability with usual treatment is around 60%, Dr. Kotulska-Jozwiak noted.
Overall, Dr. Jozwiak said that European physicians are more comfortable using vigabatrin than U.S. doctors, where the drug hasn’t been on the market as long and carries a Food and Drug Administration boxed warning of visual impairment. Its indications in the United States include infantile spasms in children 1-24 months old.
Levetiracetam (Keppra) is another option, but it’s not as effective in tuberous sclerosis. The PREVENT trial is using vigabatrin, and some U.S. doctors “are changing their minds, but it takes time,” Dr. Jozwiak said.
He noted that TSC is increasingly being diagnosed in utero, which gives a leg up on early diagnosis and prevention. The giveaways are heart tumors on ECG and cortical tubers on fetal MRI.
Dr. Jozwiak thinks the prevention approach might also help in other early seizure disorders, such as Sturge-Weber syndrome.
The work was funded by the European Commission and Polish government. Dr. Jozwiak and Dr. Kotulska-Jozwiak didn’t have any disclosures.
SOURCES: Jozwiak S et al. AES 2019, Abstract 1.218; Kotulska-Jozwiak K et al. AES 2019, Abstract 2.121.
BALTIMORE – Monitoring children who have tuberous sclerosis with EEG and treating them with vigabatrin (Sabril) at the first sign of preseizure abnormalities, rather than the usual practice of no surveillance and waiting until they have seizures, prevents epilepsy and cognitive decline, according to European investigators.
Early surveillance is recommended and standard practice in Europe. That’s not the case in the United States, but might be someday pending the results of the PREVENT trial (Preventing Epilepsy Using Vigabatrin In Infants With Tuberous Sclerosis Complex), an ongoing, National Institute of Neurological Disorders and Stroke–funded study to confirm the European findings.
“We are trying to convince doctors” in the United States and other “countries to do this. If you are not convinced to do early treatment,” at least “do surveillance with EEG. You will diagnose epilepsy earlier, and treat earlier, and children will do much better,” said Sergiusz Jozwiak, MD, PhD, head of pediatric neurology at Warsaw Medical University and recipient of an award from the U.S. Tuberous Sclerosis Alliance for his pioneering work.
Some U.S. physicians are already doing preventive treatment, but it’s hit and miss. “We are talking about monitoring children below the age of 2 years,” when seizures are associated with cognitive decline, he noted at the annual meeting of the American Epilepsy Society.
Dr. Jozwiak presented a follow-up at the meeting to his 2011 investigation, the first prevention study in tuberous sclerosis. Fourteen infants diagnosed within 2 months of birth underwent video-EEG monitoring every 4-6 weeks until age 2 years and were treated with vigabatrin 100-150 mg/kg per day when multifocal epileptiform discharges – a sign of impending seizures – were detected. Outcomes were compared with infants treated traditionally, with no EEG monitoring and vigabatrin only after they seized.
The children are about 9 years old now; the median IQ in the prevention arm is 94 versus 46 in the control group (P less than .03). Seven of the 14 prevention children (50%) never had a clinical seizure, while all but 1 of 25 (96%) in the control arm did (P = .001). Six of 11 prevention children (55%) versus 4 of 24 in the control group (17%), were able to come off antiepileptic drugs altogether, with no seizures (P less than .03). The work was published shortly before the epilepsy meeting.
The original 2011 report, which had similarly favorable outcomes when the children were 2 years old, led directly to the EpiStop trial, conducted at 16 mostly European centers and also reported at the meeting. Dr. Jozwiak was the senior investigator.
The design was different; all of the infants had EEG monitoring every 4 weeks until month 6, then every 6 weeks until age 12 months, then every 2 months until age 2 years. At the first detection of multifocal epileptiform discharges, infants were randomized 1:1 to vigabatrin or to the control group, with further monitoring followed by vigabatrin at the first seizure on EEG or first clinical seizure. An additional group of children – the open-label arm – also had EEG monitoring, but when to start vigabatrin was left up to the study site.
Only 50 of the original 94 children completed the trial to the full 2 years; tuberous sclerosis comorbidities drove many of them out, said lead investigator Katarzyna Kotulska-Jozwiak, MD, PhD, head of neurology at Children’s Memorial Health Institute, Warsaw.
Even so, the 25 children treated preventively in the randomized and open-label cohorts were more than three times as likely to be seizure free at 2 years (P = .01), and 74% less likely to develop drug-resistant epilepsy (P = .013). None of the prevention children developed infantile spasms versus 10 controls (40%) treated at first clinical or EEG seizure.
The incidence of neurodevelopmental delay was 34%, and autism 33%, at 24 months, and did not differ between prevention and control subjects. It’s probably because even children in the control group benefited from EEG surveillance and early treatment, the investigators said.
Historically, the rate of intellectual disability with usual treatment is around 60%, Dr. Kotulska-Jozwiak noted.
Overall, Dr. Jozwiak said that European physicians are more comfortable using vigabatrin than U.S. doctors, where the drug hasn’t been on the market as long and carries a Food and Drug Administration boxed warning of visual impairment. Its indications in the United States include infantile spasms in children 1-24 months old.
Levetiracetam (Keppra) is another option, but it’s not as effective in tuberous sclerosis. The PREVENT trial is using vigabatrin, and some U.S. doctors “are changing their minds, but it takes time,” Dr. Jozwiak said.
He noted that TSC is increasingly being diagnosed in utero, which gives a leg up on early diagnosis and prevention. The giveaways are heart tumors on ECG and cortical tubers on fetal MRI.
Dr. Jozwiak thinks the prevention approach might also help in other early seizure disorders, such as Sturge-Weber syndrome.
The work was funded by the European Commission and Polish government. Dr. Jozwiak and Dr. Kotulska-Jozwiak didn’t have any disclosures.
SOURCES: Jozwiak S et al. AES 2019, Abstract 1.218; Kotulska-Jozwiak K et al. AES 2019, Abstract 2.121.
BALTIMORE – Monitoring children who have tuberous sclerosis with EEG and treating them with vigabatrin (Sabril) at the first sign of preseizure abnormalities, rather than the usual practice of no surveillance and waiting until they have seizures, prevents epilepsy and cognitive decline, according to European investigators.
Early surveillance is recommended and standard practice in Europe. That’s not the case in the United States, but might be someday pending the results of the PREVENT trial (Preventing Epilepsy Using Vigabatrin In Infants With Tuberous Sclerosis Complex), an ongoing, National Institute of Neurological Disorders and Stroke–funded study to confirm the European findings.
“We are trying to convince doctors” in the United States and other “countries to do this. If you are not convinced to do early treatment,” at least “do surveillance with EEG. You will diagnose epilepsy earlier, and treat earlier, and children will do much better,” said Sergiusz Jozwiak, MD, PhD, head of pediatric neurology at Warsaw Medical University and recipient of an award from the U.S. Tuberous Sclerosis Alliance for his pioneering work.
Some U.S. physicians are already doing preventive treatment, but it’s hit and miss. “We are talking about monitoring children below the age of 2 years,” when seizures are associated with cognitive decline, he noted at the annual meeting of the American Epilepsy Society.
Dr. Jozwiak presented a follow-up at the meeting to his 2011 investigation, the first prevention study in tuberous sclerosis. Fourteen infants diagnosed within 2 months of birth underwent video-EEG monitoring every 4-6 weeks until age 2 years and were treated with vigabatrin 100-150 mg/kg per day when multifocal epileptiform discharges – a sign of impending seizures – were detected. Outcomes were compared with infants treated traditionally, with no EEG monitoring and vigabatrin only after they seized.
The children are about 9 years old now; the median IQ in the prevention arm is 94 versus 46 in the control group (P less than .03). Seven of the 14 prevention children (50%) never had a clinical seizure, while all but 1 of 25 (96%) in the control arm did (P = .001). Six of 11 prevention children (55%) versus 4 of 24 in the control group (17%), were able to come off antiepileptic drugs altogether, with no seizures (P less than .03). The work was published shortly before the epilepsy meeting.
The original 2011 report, which had similarly favorable outcomes when the children were 2 years old, led directly to the EpiStop trial, conducted at 16 mostly European centers and also reported at the meeting. Dr. Jozwiak was the senior investigator.
The design was different; all of the infants had EEG monitoring every 4 weeks until month 6, then every 6 weeks until age 12 months, then every 2 months until age 2 years. At the first detection of multifocal epileptiform discharges, infants were randomized 1:1 to vigabatrin or to the control group, with further monitoring followed by vigabatrin at the first seizure on EEG or first clinical seizure. An additional group of children – the open-label arm – also had EEG monitoring, but when to start vigabatrin was left up to the study site.
Only 50 of the original 94 children completed the trial to the full 2 years; tuberous sclerosis comorbidities drove many of them out, said lead investigator Katarzyna Kotulska-Jozwiak, MD, PhD, head of neurology at Children’s Memorial Health Institute, Warsaw.
Even so, the 25 children treated preventively in the randomized and open-label cohorts were more than three times as likely to be seizure free at 2 years (P = .01), and 74% less likely to develop drug-resistant epilepsy (P = .013). None of the prevention children developed infantile spasms versus 10 controls (40%) treated at first clinical or EEG seizure.
The incidence of neurodevelopmental delay was 34%, and autism 33%, at 24 months, and did not differ between prevention and control subjects. It’s probably because even children in the control group benefited from EEG surveillance and early treatment, the investigators said.
Historically, the rate of intellectual disability with usual treatment is around 60%, Dr. Kotulska-Jozwiak noted.
Overall, Dr. Jozwiak said that European physicians are more comfortable using vigabatrin than U.S. doctors, where the drug hasn’t been on the market as long and carries a Food and Drug Administration boxed warning of visual impairment. Its indications in the United States include infantile spasms in children 1-24 months old.
Levetiracetam (Keppra) is another option, but it’s not as effective in tuberous sclerosis. The PREVENT trial is using vigabatrin, and some U.S. doctors “are changing their minds, but it takes time,” Dr. Jozwiak said.
He noted that TSC is increasingly being diagnosed in utero, which gives a leg up on early diagnosis and prevention. The giveaways are heart tumors on ECG and cortical tubers on fetal MRI.
Dr. Jozwiak thinks the prevention approach might also help in other early seizure disorders, such as Sturge-Weber syndrome.
The work was funded by the European Commission and Polish government. Dr. Jozwiak and Dr. Kotulska-Jozwiak didn’t have any disclosures.
SOURCES: Jozwiak S et al. AES 2019, Abstract 1.218; Kotulska-Jozwiak K et al. AES 2019, Abstract 2.121.
REPORTING FROM AES 2019
First autoimmune epilepsy RCT supports IVIG therapy
BALTIMORE –
Although the numbers of enrolled subjects was small, it was the first double-blind, placebo-controlled randomized trial in autoimmune epilepsy, the start of a level 1 evidence base. Until now, treatment has been based mostly on case reports and expert opinion. “We’ve clearly shown that immunotherapy works and that treating early makes a difference, much more so than antiseizure medications,” said lead author Divyanshu Dubey, MBBS, from the Mayo Clinic.
The lack of data has meant that “we couldn’t get insurance approval for IVIG, so people have generally leaned towards” high-dose intravenous steroids, which are problematic because LGI-1 antibody epilepsy is a disease of older people, in whom osteoporosis, underlying infections, and other problems complicate steroid use, Dr. Dubey said.
The trial also included three people with contactin-associated-protein-like-2 (CASPR2) antibody epilepsy, but they all wound up in the placebo arm, “so it’s hard to say anything about them,” Dr. Dubey said at the American Epilepsy Society annual meeting. The work was published shortly before the meeting (Ann Neurol. 2019 Nov 28. doi: 10.1002/ana.25655).
CASPR2 and LGI-1 are proteins found in brain cells; attack by antibodies triggers encephalitis and tens to hundreds of seizures per day. The seizures tend to diminish with time, but the cognitive damage caused by the encephalitis does not. “We’ve seen patients end up in nursing homes diagnosed with Alzheimer’s disease” because the conditions weren’t recognized and treated, Dr. Dubey said.
He and his team chose LGI-1 and CASPR2 epilepsy because of the potentially devastating consequences and because they are among the most common autoimmune epilepsies for which antibodies have been identified. There was also a hope that positive results might open up insurance coverage.
The trial randomized eight people to IVIG 0.5 g/kg on day 1; 1 g/kg on day 2; and 0.6 g/kg once at 3 and 5 weeks. Nine others were randomized to volume-matched IV saline placebo on the same schedule. After enrollment of 17 patients (LGI1-IgG, 14; CASPR2-IgG, 3) over 34 months, the study was terminated because of slow enrollment.
Although none of the LGI-1 subjects in the placebo group responded, two CASPR2 patients did, yielding an IVIG response rate of 75% versus 22% (2/9) in the placebo arm after week 5 (odds ratio, 10.5; 95% confidence interval, 1.1-98.9; P = .044).
Two of the LGI-1 subjects in the IVIG arm were completely seizure free after treatment. Results in both arms, meanwhile, did not correlate with concomitant antiseizure medications among those who were on them.
All eight IVIG patients showed stabilization or improvement in cognitive function, compared with two of five in the placebo arm, as gauged by Repeatable Battery for the Assessment of Neuropsychological Status scores. Patients in the IVIG arm gained a median of 3 points, while patients in the placebo arm lost a median of 1 point (P = .077).
At week 5, six patients with persistent seizures who were in the placebo group were switched to the IVIG regimen after unblinding; four (67%) reported more than a 50% reduction in seizures.
Responses did not correlate with LGI-1/CASPR2-IgG1-4 subclass, and there were no IVIG-associated adverse events. One IVIG patients fell because of a faciobrachial dystonic seizure, a classic sign of LGI-1 disease. Antibodies were not measured in the trial because they “do not correlate with severity of autoimmune epilepsy,” Dr. Dubey said.
The original plan was to enroll 30 subjects, but the investigators terminated the study after 18 because of slow enrollment. With knowledge of autoimmune epilepsy growing at Mayo, it was increasingly difficult to find immunotherapy-naive patients, he said.
All the subjects were between 60 and 70 years old, and the majority in both arms were men, which was not surprising because the conditions skew male, Dr. Dubey said. None of the patients had underlying tumors, which are known triggers of autoimmune epilepsy.
This work was funded by Grifols Shared Services, a maker of IVIG, and Option Care, a provider of home infusion equipment. Dr. Dubey said the company had no active role in the trial, but that the lack of insurance coverage for IVIG in autoimmune epilepsy was one of the drivers of the study. He disclosed research support from Grifols; another investigator is a consultant.
SOURCE: Dubey D et al. AES 2019, Abstract 1.292.
BALTIMORE –
Although the numbers of enrolled subjects was small, it was the first double-blind, placebo-controlled randomized trial in autoimmune epilepsy, the start of a level 1 evidence base. Until now, treatment has been based mostly on case reports and expert opinion. “We’ve clearly shown that immunotherapy works and that treating early makes a difference, much more so than antiseizure medications,” said lead author Divyanshu Dubey, MBBS, from the Mayo Clinic.
The lack of data has meant that “we couldn’t get insurance approval for IVIG, so people have generally leaned towards” high-dose intravenous steroids, which are problematic because LGI-1 antibody epilepsy is a disease of older people, in whom osteoporosis, underlying infections, and other problems complicate steroid use, Dr. Dubey said.
The trial also included three people with contactin-associated-protein-like-2 (CASPR2) antibody epilepsy, but they all wound up in the placebo arm, “so it’s hard to say anything about them,” Dr. Dubey said at the American Epilepsy Society annual meeting. The work was published shortly before the meeting (Ann Neurol. 2019 Nov 28. doi: 10.1002/ana.25655).
CASPR2 and LGI-1 are proteins found in brain cells; attack by antibodies triggers encephalitis and tens to hundreds of seizures per day. The seizures tend to diminish with time, but the cognitive damage caused by the encephalitis does not. “We’ve seen patients end up in nursing homes diagnosed with Alzheimer’s disease” because the conditions weren’t recognized and treated, Dr. Dubey said.
He and his team chose LGI-1 and CASPR2 epilepsy because of the potentially devastating consequences and because they are among the most common autoimmune epilepsies for which antibodies have been identified. There was also a hope that positive results might open up insurance coverage.
The trial randomized eight people to IVIG 0.5 g/kg on day 1; 1 g/kg on day 2; and 0.6 g/kg once at 3 and 5 weeks. Nine others were randomized to volume-matched IV saline placebo on the same schedule. After enrollment of 17 patients (LGI1-IgG, 14; CASPR2-IgG, 3) over 34 months, the study was terminated because of slow enrollment.
Although none of the LGI-1 subjects in the placebo group responded, two CASPR2 patients did, yielding an IVIG response rate of 75% versus 22% (2/9) in the placebo arm after week 5 (odds ratio, 10.5; 95% confidence interval, 1.1-98.9; P = .044).
Two of the LGI-1 subjects in the IVIG arm were completely seizure free after treatment. Results in both arms, meanwhile, did not correlate with concomitant antiseizure medications among those who were on them.
All eight IVIG patients showed stabilization or improvement in cognitive function, compared with two of five in the placebo arm, as gauged by Repeatable Battery for the Assessment of Neuropsychological Status scores. Patients in the IVIG arm gained a median of 3 points, while patients in the placebo arm lost a median of 1 point (P = .077).
At week 5, six patients with persistent seizures who were in the placebo group were switched to the IVIG regimen after unblinding; four (67%) reported more than a 50% reduction in seizures.
Responses did not correlate with LGI-1/CASPR2-IgG1-4 subclass, and there were no IVIG-associated adverse events. One IVIG patients fell because of a faciobrachial dystonic seizure, a classic sign of LGI-1 disease. Antibodies were not measured in the trial because they “do not correlate with severity of autoimmune epilepsy,” Dr. Dubey said.
The original plan was to enroll 30 subjects, but the investigators terminated the study after 18 because of slow enrollment. With knowledge of autoimmune epilepsy growing at Mayo, it was increasingly difficult to find immunotherapy-naive patients, he said.
All the subjects were between 60 and 70 years old, and the majority in both arms were men, which was not surprising because the conditions skew male, Dr. Dubey said. None of the patients had underlying tumors, which are known triggers of autoimmune epilepsy.
This work was funded by Grifols Shared Services, a maker of IVIG, and Option Care, a provider of home infusion equipment. Dr. Dubey said the company had no active role in the trial, but that the lack of insurance coverage for IVIG in autoimmune epilepsy was one of the drivers of the study. He disclosed research support from Grifols; another investigator is a consultant.
SOURCE: Dubey D et al. AES 2019, Abstract 1.292.
BALTIMORE –
Although the numbers of enrolled subjects was small, it was the first double-blind, placebo-controlled randomized trial in autoimmune epilepsy, the start of a level 1 evidence base. Until now, treatment has been based mostly on case reports and expert opinion. “We’ve clearly shown that immunotherapy works and that treating early makes a difference, much more so than antiseizure medications,” said lead author Divyanshu Dubey, MBBS, from the Mayo Clinic.
The lack of data has meant that “we couldn’t get insurance approval for IVIG, so people have generally leaned towards” high-dose intravenous steroids, which are problematic because LGI-1 antibody epilepsy is a disease of older people, in whom osteoporosis, underlying infections, and other problems complicate steroid use, Dr. Dubey said.
The trial also included three people with contactin-associated-protein-like-2 (CASPR2) antibody epilepsy, but they all wound up in the placebo arm, “so it’s hard to say anything about them,” Dr. Dubey said at the American Epilepsy Society annual meeting. The work was published shortly before the meeting (Ann Neurol. 2019 Nov 28. doi: 10.1002/ana.25655).
CASPR2 and LGI-1 are proteins found in brain cells; attack by antibodies triggers encephalitis and tens to hundreds of seizures per day. The seizures tend to diminish with time, but the cognitive damage caused by the encephalitis does not. “We’ve seen patients end up in nursing homes diagnosed with Alzheimer’s disease” because the conditions weren’t recognized and treated, Dr. Dubey said.
He and his team chose LGI-1 and CASPR2 epilepsy because of the potentially devastating consequences and because they are among the most common autoimmune epilepsies for which antibodies have been identified. There was also a hope that positive results might open up insurance coverage.
The trial randomized eight people to IVIG 0.5 g/kg on day 1; 1 g/kg on day 2; and 0.6 g/kg once at 3 and 5 weeks. Nine others were randomized to volume-matched IV saline placebo on the same schedule. After enrollment of 17 patients (LGI1-IgG, 14; CASPR2-IgG, 3) over 34 months, the study was terminated because of slow enrollment.
Although none of the LGI-1 subjects in the placebo group responded, two CASPR2 patients did, yielding an IVIG response rate of 75% versus 22% (2/9) in the placebo arm after week 5 (odds ratio, 10.5; 95% confidence interval, 1.1-98.9; P = .044).
Two of the LGI-1 subjects in the IVIG arm were completely seizure free after treatment. Results in both arms, meanwhile, did not correlate with concomitant antiseizure medications among those who were on them.
All eight IVIG patients showed stabilization or improvement in cognitive function, compared with two of five in the placebo arm, as gauged by Repeatable Battery for the Assessment of Neuropsychological Status scores. Patients in the IVIG arm gained a median of 3 points, while patients in the placebo arm lost a median of 1 point (P = .077).
At week 5, six patients with persistent seizures who were in the placebo group were switched to the IVIG regimen after unblinding; four (67%) reported more than a 50% reduction in seizures.
Responses did not correlate with LGI-1/CASPR2-IgG1-4 subclass, and there were no IVIG-associated adverse events. One IVIG patients fell because of a faciobrachial dystonic seizure, a classic sign of LGI-1 disease. Antibodies were not measured in the trial because they “do not correlate with severity of autoimmune epilepsy,” Dr. Dubey said.
The original plan was to enroll 30 subjects, but the investigators terminated the study after 18 because of slow enrollment. With knowledge of autoimmune epilepsy growing at Mayo, it was increasingly difficult to find immunotherapy-naive patients, he said.
All the subjects were between 60 and 70 years old, and the majority in both arms were men, which was not surprising because the conditions skew male, Dr. Dubey said. None of the patients had underlying tumors, which are known triggers of autoimmune epilepsy.
This work was funded by Grifols Shared Services, a maker of IVIG, and Option Care, a provider of home infusion equipment. Dr. Dubey said the company had no active role in the trial, but that the lack of insurance coverage for IVIG in autoimmune epilepsy was one of the drivers of the study. He disclosed research support from Grifols; another investigator is a consultant.
SOURCE: Dubey D et al. AES 2019, Abstract 1.292.
REPORTING FROM AES 2019
FDA warns gabapentin, pregabalin may cause serious breathing problems
Elderly patients who take these drugs also are at increased risk of breathing problems, the announcement said.
Gabapentin (marketed as Neurontin, Gralise, and Horizant) and pregabalin (Lyrica and Lyrica CR) are used to treat seizures, nerve pain, and restless legs syndrome. Physicians increasingly are prescribing these medications, and people are misusing and abusing these drugs more frequently, the agency said. Gabapentin and pregabalin often are combined with central nervous system depressants such as opioids, antianxiety medicines, antidepressants, and antihistamines, which increases the risk of respiratory depression.
Conditions that reduce lung function, including chronic obstructive pulmonary disease (COPD), also increase the likelihood of breathing problems when taking gabapentin and pregabalin.
“There is less evidence supporting the risk of serious breathing difficulties in healthy individuals taking gabapentinoids alone. We will continue to monitor these medicines as part of our routine monitoring of all FDA-approved drugs,” the announcement said.
The FDA is requiring new warnings about the risk of respiratory depression in the prescribing information of gabapentinoids. In addition, drug manufacturers must further assess the abuse potential of these drugs, particularly in combination with opioids.
Patients and caregivers should seek immediate medical attention for respiratory problems, which can be life threatening. Symptoms include confusion or disorientation; unusual dizziness or lightheadedness; extreme sleepiness or lethargy; slowed, shallow, or difficult breathing; unresponsiveness; and bluish-colored or tinted skin, especially on the lips, fingers, and toes.
Physicians should start gabapentinoids at the lowest dose and monitor patients for symptoms of respiratory depression and sedation when coprescribing these drugs with an opioid or other central nervous system depressant such as a benzodiazepine, according to the FDA.
The agency reviewed 49 case reports that were submitted between 2012 and 2017. Among these cases, 12 people died from respiratory depression with gabapentinoids. All of the patients who died had at least one risk factor.
Gabapentin first was approved in 1993, and pregabalin was approved in 2004. Drug adverse events and side effects can be reported online, the agency noted.
Elderly patients who take these drugs also are at increased risk of breathing problems, the announcement said.
Gabapentin (marketed as Neurontin, Gralise, and Horizant) and pregabalin (Lyrica and Lyrica CR) are used to treat seizures, nerve pain, and restless legs syndrome. Physicians increasingly are prescribing these medications, and people are misusing and abusing these drugs more frequently, the agency said. Gabapentin and pregabalin often are combined with central nervous system depressants such as opioids, antianxiety medicines, antidepressants, and antihistamines, which increases the risk of respiratory depression.
Conditions that reduce lung function, including chronic obstructive pulmonary disease (COPD), also increase the likelihood of breathing problems when taking gabapentin and pregabalin.
“There is less evidence supporting the risk of serious breathing difficulties in healthy individuals taking gabapentinoids alone. We will continue to monitor these medicines as part of our routine monitoring of all FDA-approved drugs,” the announcement said.
The FDA is requiring new warnings about the risk of respiratory depression in the prescribing information of gabapentinoids. In addition, drug manufacturers must further assess the abuse potential of these drugs, particularly in combination with opioids.
Patients and caregivers should seek immediate medical attention for respiratory problems, which can be life threatening. Symptoms include confusion or disorientation; unusual dizziness or lightheadedness; extreme sleepiness or lethargy; slowed, shallow, or difficult breathing; unresponsiveness; and bluish-colored or tinted skin, especially on the lips, fingers, and toes.
Physicians should start gabapentinoids at the lowest dose and monitor patients for symptoms of respiratory depression and sedation when coprescribing these drugs with an opioid or other central nervous system depressant such as a benzodiazepine, according to the FDA.
The agency reviewed 49 case reports that were submitted between 2012 and 2017. Among these cases, 12 people died from respiratory depression with gabapentinoids. All of the patients who died had at least one risk factor.
Gabapentin first was approved in 1993, and pregabalin was approved in 2004. Drug adverse events and side effects can be reported online, the agency noted.
Elderly patients who take these drugs also are at increased risk of breathing problems, the announcement said.
Gabapentin (marketed as Neurontin, Gralise, and Horizant) and pregabalin (Lyrica and Lyrica CR) are used to treat seizures, nerve pain, and restless legs syndrome. Physicians increasingly are prescribing these medications, and people are misusing and abusing these drugs more frequently, the agency said. Gabapentin and pregabalin often are combined with central nervous system depressants such as opioids, antianxiety medicines, antidepressants, and antihistamines, which increases the risk of respiratory depression.
Conditions that reduce lung function, including chronic obstructive pulmonary disease (COPD), also increase the likelihood of breathing problems when taking gabapentin and pregabalin.
“There is less evidence supporting the risk of serious breathing difficulties in healthy individuals taking gabapentinoids alone. We will continue to monitor these medicines as part of our routine monitoring of all FDA-approved drugs,” the announcement said.
The FDA is requiring new warnings about the risk of respiratory depression in the prescribing information of gabapentinoids. In addition, drug manufacturers must further assess the abuse potential of these drugs, particularly in combination with opioids.
Patients and caregivers should seek immediate medical attention for respiratory problems, which can be life threatening. Symptoms include confusion or disorientation; unusual dizziness or lightheadedness; extreme sleepiness or lethargy; slowed, shallow, or difficult breathing; unresponsiveness; and bluish-colored or tinted skin, especially on the lips, fingers, and toes.
Physicians should start gabapentinoids at the lowest dose and monitor patients for symptoms of respiratory depression and sedation when coprescribing these drugs with an opioid or other central nervous system depressant such as a benzodiazepine, according to the FDA.
The agency reviewed 49 case reports that were submitted between 2012 and 2017. Among these cases, 12 people died from respiratory depression with gabapentinoids. All of the patients who died had at least one risk factor.
Gabapentin first was approved in 1993, and pregabalin was approved in 2004. Drug adverse events and side effects can be reported online, the agency noted.
California researchers work to update EMS status epilepticus protocols
BALTIMORE – Investigators from the University of California, San Francisco, are working with medical directors across the state to update county emergency medical services protocols to ensure patients in status epilepticus get 10 mg IM midazolam in the field, per national treatment guidelines from the American Epilepsy Society.
The work comes in the wake of a recent research letter in JAMA where the UCSF team reported that, across 33 emergency medical services (EMS) in California, only 2 included 10 mg midazolam IM per the guidelines, advice based on randomized, controlled clinical trials that found it to be safe and effective for stopping prehospital seizures in adults.
“Making people aware of the problem [is having] an impact,” said investigator Elan Guterman, MD, a neurology hospitalist and assistant professor of neurology at the university.
In a follow-up review at the annual meeting of the American Epilepsy Society, the team took a deep dive into the situation in Alameda County, just east of San Francisco and including the city of Oakland, as an indicator of what’s been going on across the state.
Patients had to have an EMS record of active seizures, meaning more than two within 5 minutes or a single seizure lasting more than 5 minutes. Alameda ambulance crews, like most, carry intramuscular midazolam because it’s more shelf stable than the two other first-line options, lorazepam and diazepam, and doesn’t require an intravenous line.
Among the 2,494 adults treated for status epilepticus from 2013 to 2018, just 62% received intramuscular midazolam, and only 39% got a dose of 5 mg or more. Not a single patient received the recommended 10-mg IM injection.
In short, “at the time when it’s the most important to act quickly, patients were not receiving the care they needed,” and the problem isn’t likely limited to California, Dr. Guterman said.
When patients did get 5 mg or more, they were less likely to reseize and require additional doses (adjusted odds ratio, 0.59; 95% CI, 0.4-0.86). Also – and counterintuitively given the concern about benzodiazepines and respiratory depression – the team found that higher initial doses of 5 mg or more were actually associated with a lower need for respiratory support, including intubation (OR, 0.81; 95% CI, 0.67-0.99).
It’s possible ambulance crews were erring on the side of caution. People who got midazolam were more likely to have an established diagnosis of epilepsy (68% vs. 62%; P less than .01) and less likely to have been abusing drugs or alcohol (12.5% vs. 16.3%; P less than .01).
But an abundance of caution doesn’t fully explain it; even among people known to have epilepsy, many weren’t treated with midazolam and none at the appropriate dose.
Dr. Guterman thinks the bigger issue is what was reported in the research letter: Local EMS protocols simply haven’t been updated to include current best practices. EMS services might not even be aware of them, which is why she and her colleagues have been meeting with county medical directors.
“The first step is making sure the EMS world is aware of this gap in care, and motivating them to address it,” she said.
Patients in the study were a mean of 53 years old, and just over half were men.
There was no industry funding for the study, and Dr. Guterman didn’t report any relevant disclosures.
SOURCE: Guterman E et al. AES 2019, Abstract 1.394.
BALTIMORE – Investigators from the University of California, San Francisco, are working with medical directors across the state to update county emergency medical services protocols to ensure patients in status epilepticus get 10 mg IM midazolam in the field, per national treatment guidelines from the American Epilepsy Society.
The work comes in the wake of a recent research letter in JAMA where the UCSF team reported that, across 33 emergency medical services (EMS) in California, only 2 included 10 mg midazolam IM per the guidelines, advice based on randomized, controlled clinical trials that found it to be safe and effective for stopping prehospital seizures in adults.
“Making people aware of the problem [is having] an impact,” said investigator Elan Guterman, MD, a neurology hospitalist and assistant professor of neurology at the university.
In a follow-up review at the annual meeting of the American Epilepsy Society, the team took a deep dive into the situation in Alameda County, just east of San Francisco and including the city of Oakland, as an indicator of what’s been going on across the state.
Patients had to have an EMS record of active seizures, meaning more than two within 5 minutes or a single seizure lasting more than 5 minutes. Alameda ambulance crews, like most, carry intramuscular midazolam because it’s more shelf stable than the two other first-line options, lorazepam and diazepam, and doesn’t require an intravenous line.
Among the 2,494 adults treated for status epilepticus from 2013 to 2018, just 62% received intramuscular midazolam, and only 39% got a dose of 5 mg or more. Not a single patient received the recommended 10-mg IM injection.
In short, “at the time when it’s the most important to act quickly, patients were not receiving the care they needed,” and the problem isn’t likely limited to California, Dr. Guterman said.
When patients did get 5 mg or more, they were less likely to reseize and require additional doses (adjusted odds ratio, 0.59; 95% CI, 0.4-0.86). Also – and counterintuitively given the concern about benzodiazepines and respiratory depression – the team found that higher initial doses of 5 mg or more were actually associated with a lower need for respiratory support, including intubation (OR, 0.81; 95% CI, 0.67-0.99).
It’s possible ambulance crews were erring on the side of caution. People who got midazolam were more likely to have an established diagnosis of epilepsy (68% vs. 62%; P less than .01) and less likely to have been abusing drugs or alcohol (12.5% vs. 16.3%; P less than .01).
But an abundance of caution doesn’t fully explain it; even among people known to have epilepsy, many weren’t treated with midazolam and none at the appropriate dose.
Dr. Guterman thinks the bigger issue is what was reported in the research letter: Local EMS protocols simply haven’t been updated to include current best practices. EMS services might not even be aware of them, which is why she and her colleagues have been meeting with county medical directors.
“The first step is making sure the EMS world is aware of this gap in care, and motivating them to address it,” she said.
Patients in the study were a mean of 53 years old, and just over half were men.
There was no industry funding for the study, and Dr. Guterman didn’t report any relevant disclosures.
SOURCE: Guterman E et al. AES 2019, Abstract 1.394.
BALTIMORE – Investigators from the University of California, San Francisco, are working with medical directors across the state to update county emergency medical services protocols to ensure patients in status epilepticus get 10 mg IM midazolam in the field, per national treatment guidelines from the American Epilepsy Society.
The work comes in the wake of a recent research letter in JAMA where the UCSF team reported that, across 33 emergency medical services (EMS) in California, only 2 included 10 mg midazolam IM per the guidelines, advice based on randomized, controlled clinical trials that found it to be safe and effective for stopping prehospital seizures in adults.
“Making people aware of the problem [is having] an impact,” said investigator Elan Guterman, MD, a neurology hospitalist and assistant professor of neurology at the university.
In a follow-up review at the annual meeting of the American Epilepsy Society, the team took a deep dive into the situation in Alameda County, just east of San Francisco and including the city of Oakland, as an indicator of what’s been going on across the state.
Patients had to have an EMS record of active seizures, meaning more than two within 5 minutes or a single seizure lasting more than 5 minutes. Alameda ambulance crews, like most, carry intramuscular midazolam because it’s more shelf stable than the two other first-line options, lorazepam and diazepam, and doesn’t require an intravenous line.
Among the 2,494 adults treated for status epilepticus from 2013 to 2018, just 62% received intramuscular midazolam, and only 39% got a dose of 5 mg or more. Not a single patient received the recommended 10-mg IM injection.
In short, “at the time when it’s the most important to act quickly, patients were not receiving the care they needed,” and the problem isn’t likely limited to California, Dr. Guterman said.
When patients did get 5 mg or more, they were less likely to reseize and require additional doses (adjusted odds ratio, 0.59; 95% CI, 0.4-0.86). Also – and counterintuitively given the concern about benzodiazepines and respiratory depression – the team found that higher initial doses of 5 mg or more were actually associated with a lower need for respiratory support, including intubation (OR, 0.81; 95% CI, 0.67-0.99).
It’s possible ambulance crews were erring on the side of caution. People who got midazolam were more likely to have an established diagnosis of epilepsy (68% vs. 62%; P less than .01) and less likely to have been abusing drugs or alcohol (12.5% vs. 16.3%; P less than .01).
But an abundance of caution doesn’t fully explain it; even among people known to have epilepsy, many weren’t treated with midazolam and none at the appropriate dose.
Dr. Guterman thinks the bigger issue is what was reported in the research letter: Local EMS protocols simply haven’t been updated to include current best practices. EMS services might not even be aware of them, which is why she and her colleagues have been meeting with county medical directors.
“The first step is making sure the EMS world is aware of this gap in care, and motivating them to address it,” she said.
Patients in the study were a mean of 53 years old, and just over half were men.
There was no industry funding for the study, and Dr. Guterman didn’t report any relevant disclosures.
SOURCE: Guterman E et al. AES 2019, Abstract 1.394.
REPORTING FROM AES 2019
Employment is associated with high likelihood of declining epilepsy surgery
BALTIMORE – , according to an analysis presented at the annual meeting of the American Epilepsy Society. “Future work should confirm this finding prospectively, determine if it holds in other patient populations, and explore the decision to proceed with or decline epilepsy surgery from a patient-centered perspective,” said Vishal Mandge, MD, MPH, a clinical neurophysiology fellow at Duke University in Durham, N.C., and colleagues. “Identifying the role that factors such as the fear of losing employment due to complications from surgery and inability to take medical leave for an extended period of time play in the patient’s decision to proceed with epilepsy surgery may identify needs and suggest strategies to reduce barriers to this underutilized treatment.”
Although epilepsy surgery is known to be safe and effective, many surgical candidates with drug-resistant epilepsy decline to undergo the procedure. Prior investigations of the barriers to epilepsy surgery have focused on access to epilepsy centers that offer epilepsy surgery and patients’ reluctance to undergo presurgical evaluation. Dr. Mandge and colleagues instead set out to evaluate the association between various demographic, disease-specific, and epilepsy-evaluation variables and patients’ decision to decline surgery after they have been identified as candidates.
A retrospective case-control study
The investigators conducted a retrospective case-control study of patients who were discussed at the epilepsy surgery conference of a tertiary care hospital serving an urban New York community between Jan. 1, 2009, and June 30, 2017. They identified patients who were considered candidates for resective epilepsy surgery. Dr. Mandge and colleagues used the chi-squared test for nominal variables and analysis of variance for scale variables to evaluate these variables’ associations with a patient’s decision to decline epilepsy surgery. They also performed multivariate binary logistic regression to identify variables that predict a patient’s decision to decline surgery.
Dr. Mandge and colleagues identified 159 patients who were discussed during the study period. Of this group, 87 patients were eligible for resective epilepsy surgery after a thorough evaluation. Thirty-four (40%) of the eligible patients declined to undergo surgery. Approximately 20% of eligible patients were employed, and 70% of patients had a high school diploma or higher education.
Univariate analysis indicated that employment (odds ratio, 4.2), temporal lesion on MRI (OR, 0.35), temporal EEG localization (OR, 0.21), and temporal seizure onset zone (OR, 0.19) were independently and significantly associated with a patient’s decision to decline surgery. Multivariate logistic regression analysis indicated that current employment (OR, 7.5), the number of current antiepileptic drugs (AEDs; OR, 3.5), and concordance between seizure semiology, seizure onset on EEG, and imaging (OR, 0.08) were significantly associated with a patient’s decision to decline surgery.
Fear of unemployment may explain results
“With each additional AED, the patients were 3.5 times more likely to decline surgery, even after adjusting for other variables,” said Alexis D. Boro, MD, a neurologist at Montefiore Medical Center in New York and one of the investigators. “My suspicion is that some of this reflects the burden of taking a lot of seizure medication. While the medications are much, much safer than seizures, and looking for and dealing with side effects is a lot of what we do, people often don’t feel great when they are taking multiple seizure medications. We counsel our patients that they should generally expect to stay on some seizure medications after surgery. The reason for surgery is to stop the seizures, not to stop the medications. We are often able to reduce medications after a period of time after surgery, and for many patients, this is one of the benefits.”
The association between employment and increased likelihood of declining surgery was unexpected and may not hold everywhere, said Dr. Boro. “We had expected the opposite result because we assumed that employed patients would be concerned that a seizure at work might result in loss of work. But it may be that many of our patients who are employed are concerned about losing their jobs if they miss work for a medical procedure. Some of our patients may be concerned about sharing medical information with their employers. For some of our patients, being employed may imply limited insurance coverage.”
The study was not supported by external funding, and the investigators did not report any disclosures.
SOURCE: Mandge VA et al. AES 2019, Abstract 1.362.
BALTIMORE – , according to an analysis presented at the annual meeting of the American Epilepsy Society. “Future work should confirm this finding prospectively, determine if it holds in other patient populations, and explore the decision to proceed with or decline epilepsy surgery from a patient-centered perspective,” said Vishal Mandge, MD, MPH, a clinical neurophysiology fellow at Duke University in Durham, N.C., and colleagues. “Identifying the role that factors such as the fear of losing employment due to complications from surgery and inability to take medical leave for an extended period of time play in the patient’s decision to proceed with epilepsy surgery may identify needs and suggest strategies to reduce barriers to this underutilized treatment.”
Although epilepsy surgery is known to be safe and effective, many surgical candidates with drug-resistant epilepsy decline to undergo the procedure. Prior investigations of the barriers to epilepsy surgery have focused on access to epilepsy centers that offer epilepsy surgery and patients’ reluctance to undergo presurgical evaluation. Dr. Mandge and colleagues instead set out to evaluate the association between various demographic, disease-specific, and epilepsy-evaluation variables and patients’ decision to decline surgery after they have been identified as candidates.
A retrospective case-control study
The investigators conducted a retrospective case-control study of patients who were discussed at the epilepsy surgery conference of a tertiary care hospital serving an urban New York community between Jan. 1, 2009, and June 30, 2017. They identified patients who were considered candidates for resective epilepsy surgery. Dr. Mandge and colleagues used the chi-squared test for nominal variables and analysis of variance for scale variables to evaluate these variables’ associations with a patient’s decision to decline epilepsy surgery. They also performed multivariate binary logistic regression to identify variables that predict a patient’s decision to decline surgery.
Dr. Mandge and colleagues identified 159 patients who were discussed during the study period. Of this group, 87 patients were eligible for resective epilepsy surgery after a thorough evaluation. Thirty-four (40%) of the eligible patients declined to undergo surgery. Approximately 20% of eligible patients were employed, and 70% of patients had a high school diploma or higher education.
Univariate analysis indicated that employment (odds ratio, 4.2), temporal lesion on MRI (OR, 0.35), temporal EEG localization (OR, 0.21), and temporal seizure onset zone (OR, 0.19) were independently and significantly associated with a patient’s decision to decline surgery. Multivariate logistic regression analysis indicated that current employment (OR, 7.5), the number of current antiepileptic drugs (AEDs; OR, 3.5), and concordance between seizure semiology, seizure onset on EEG, and imaging (OR, 0.08) were significantly associated with a patient’s decision to decline surgery.
Fear of unemployment may explain results
“With each additional AED, the patients were 3.5 times more likely to decline surgery, even after adjusting for other variables,” said Alexis D. Boro, MD, a neurologist at Montefiore Medical Center in New York and one of the investigators. “My suspicion is that some of this reflects the burden of taking a lot of seizure medication. While the medications are much, much safer than seizures, and looking for and dealing with side effects is a lot of what we do, people often don’t feel great when they are taking multiple seizure medications. We counsel our patients that they should generally expect to stay on some seizure medications after surgery. The reason for surgery is to stop the seizures, not to stop the medications. We are often able to reduce medications after a period of time after surgery, and for many patients, this is one of the benefits.”
The association between employment and increased likelihood of declining surgery was unexpected and may not hold everywhere, said Dr. Boro. “We had expected the opposite result because we assumed that employed patients would be concerned that a seizure at work might result in loss of work. But it may be that many of our patients who are employed are concerned about losing their jobs if they miss work for a medical procedure. Some of our patients may be concerned about sharing medical information with their employers. For some of our patients, being employed may imply limited insurance coverage.”
The study was not supported by external funding, and the investigators did not report any disclosures.
SOURCE: Mandge VA et al. AES 2019, Abstract 1.362.
BALTIMORE – , according to an analysis presented at the annual meeting of the American Epilepsy Society. “Future work should confirm this finding prospectively, determine if it holds in other patient populations, and explore the decision to proceed with or decline epilepsy surgery from a patient-centered perspective,” said Vishal Mandge, MD, MPH, a clinical neurophysiology fellow at Duke University in Durham, N.C., and colleagues. “Identifying the role that factors such as the fear of losing employment due to complications from surgery and inability to take medical leave for an extended period of time play in the patient’s decision to proceed with epilepsy surgery may identify needs and suggest strategies to reduce barriers to this underutilized treatment.”
Although epilepsy surgery is known to be safe and effective, many surgical candidates with drug-resistant epilepsy decline to undergo the procedure. Prior investigations of the barriers to epilepsy surgery have focused on access to epilepsy centers that offer epilepsy surgery and patients’ reluctance to undergo presurgical evaluation. Dr. Mandge and colleagues instead set out to evaluate the association between various demographic, disease-specific, and epilepsy-evaluation variables and patients’ decision to decline surgery after they have been identified as candidates.
A retrospective case-control study
The investigators conducted a retrospective case-control study of patients who were discussed at the epilepsy surgery conference of a tertiary care hospital serving an urban New York community between Jan. 1, 2009, and June 30, 2017. They identified patients who were considered candidates for resective epilepsy surgery. Dr. Mandge and colleagues used the chi-squared test for nominal variables and analysis of variance for scale variables to evaluate these variables’ associations with a patient’s decision to decline epilepsy surgery. They also performed multivariate binary logistic regression to identify variables that predict a patient’s decision to decline surgery.
Dr. Mandge and colleagues identified 159 patients who were discussed during the study period. Of this group, 87 patients were eligible for resective epilepsy surgery after a thorough evaluation. Thirty-four (40%) of the eligible patients declined to undergo surgery. Approximately 20% of eligible patients were employed, and 70% of patients had a high school diploma or higher education.
Univariate analysis indicated that employment (odds ratio, 4.2), temporal lesion on MRI (OR, 0.35), temporal EEG localization (OR, 0.21), and temporal seizure onset zone (OR, 0.19) were independently and significantly associated with a patient’s decision to decline surgery. Multivariate logistic regression analysis indicated that current employment (OR, 7.5), the number of current antiepileptic drugs (AEDs; OR, 3.5), and concordance between seizure semiology, seizure onset on EEG, and imaging (OR, 0.08) were significantly associated with a patient’s decision to decline surgery.
Fear of unemployment may explain results
“With each additional AED, the patients were 3.5 times more likely to decline surgery, even after adjusting for other variables,” said Alexis D. Boro, MD, a neurologist at Montefiore Medical Center in New York and one of the investigators. “My suspicion is that some of this reflects the burden of taking a lot of seizure medication. While the medications are much, much safer than seizures, and looking for and dealing with side effects is a lot of what we do, people often don’t feel great when they are taking multiple seizure medications. We counsel our patients that they should generally expect to stay on some seizure medications after surgery. The reason for surgery is to stop the seizures, not to stop the medications. We are often able to reduce medications after a period of time after surgery, and for many patients, this is one of the benefits.”
The association between employment and increased likelihood of declining surgery was unexpected and may not hold everywhere, said Dr. Boro. “We had expected the opposite result because we assumed that employed patients would be concerned that a seizure at work might result in loss of work. But it may be that many of our patients who are employed are concerned about losing their jobs if they miss work for a medical procedure. Some of our patients may be concerned about sharing medical information with their employers. For some of our patients, being employed may imply limited insurance coverage.”
The study was not supported by external funding, and the investigators did not report any disclosures.
SOURCE: Mandge VA et al. AES 2019, Abstract 1.362.
REPORTING FROM AES 2019
Cardiac arrhythmia heightens mortality risk during epilepsy hospitalizations
BALTIMORE – Patients hospitalized for epilepsy may have higher odds of death if they have a secondary diagnosis of arrhythmia, whereas the presence of apnea alone may not significantly increase mortality, according to an analysis of data from the Nationwide Inpatient Sample presented at the annual meeting of the American Epilepsy Society.
“If you have someone with arrhythmia and epilepsy, you have to be more concerned about possible SUDEP [sudden unexpected death in epilepsy],” relative to someone with apnea and epilepsy, said senior study author Sanjay P. Singh, MD, professor of neurology at Creighton University, Omaha, Neb.
Research indicates that apnea and cardiac arrhythmias may contribute to SUDEP, and the incidence of SUDEP is higher in patients with intractable epilepsy.
To identify the prevalence of apnea, arrhythmia, and both conditions in epilepsy hospitalizations, as well as the prevalence of intractable epilepsy and mortality, Dr. Singh and colleagues performed a retrospective, cross-sectional analysis of pediatric and adult epilepsy hospitalizations between 2003 and 2014 in the Nationwide Inpatient Sample. They determined apnea and arrhythmia diagnoses using ICD-9-CM codes.
Among more than 2.6 million epilepsy hospitalizations, the prevalence of apnea was 2.75%, the prevalence of arrhythmia was 8.91%, and the prevalence of both was 0.49%. The proportion of patients with intractable epilepsy was 7.7%. Among the more than 207,000 hospitalizations with intractable epilepsy, the prevalence of apnea was 3.62%, the prevalence of arrhythmia was 3.34%, and the prevalence of both was 0.36%. The prevalence trend of apnea, arrhythmia, and both together increased between 2003 and 2014.
“In univariate analysis, prevalence of mortality was highest among patients with arrhythmia,” the researchers reported, at – 3.1% in patients with arrhythmia versus 0.48% in patients with apnea, 2.91% in patients with both, and 0.46% in patients without apnea or arrhythmia.
In a multivariable regression analysis, significant and independent predictors of death included intractable epilepsy (odds ratio, 1.17), apnea (OR, 0.84), arrhythmia (OR, 3.29), and the presence of both apnea and arrhythmia (OR, 3.24). When hospitalization was complicated by intractable epilepsy, the odds of death rose with the presence of apnea (OR, 2.07), arrhythmia (OR, 8.39), and with both apnea and arrhythmia (OR, 11.64).
The results highlight the importance of effective epilepsy management, said first author Urvish K. Patel, MBBS, also with Creighton University. “If we can stop [conversion to intractable epilepsy], then this odds ratio can go down.”
Attention to arrhythmias, as well as the combination of arrhythmias and apnea, may “be important in identifying patients at risk for SUDEP,” the authors concluded.
The researchers had no disclosures and reported receiving no outside funding for their work.
SOURCE: Patel UK et al. AES 2019, Abstract 2.140.
BALTIMORE – Patients hospitalized for epilepsy may have higher odds of death if they have a secondary diagnosis of arrhythmia, whereas the presence of apnea alone may not significantly increase mortality, according to an analysis of data from the Nationwide Inpatient Sample presented at the annual meeting of the American Epilepsy Society.
“If you have someone with arrhythmia and epilepsy, you have to be more concerned about possible SUDEP [sudden unexpected death in epilepsy],” relative to someone with apnea and epilepsy, said senior study author Sanjay P. Singh, MD, professor of neurology at Creighton University, Omaha, Neb.
Research indicates that apnea and cardiac arrhythmias may contribute to SUDEP, and the incidence of SUDEP is higher in patients with intractable epilepsy.
To identify the prevalence of apnea, arrhythmia, and both conditions in epilepsy hospitalizations, as well as the prevalence of intractable epilepsy and mortality, Dr. Singh and colleagues performed a retrospective, cross-sectional analysis of pediatric and adult epilepsy hospitalizations between 2003 and 2014 in the Nationwide Inpatient Sample. They determined apnea and arrhythmia diagnoses using ICD-9-CM codes.
Among more than 2.6 million epilepsy hospitalizations, the prevalence of apnea was 2.75%, the prevalence of arrhythmia was 8.91%, and the prevalence of both was 0.49%. The proportion of patients with intractable epilepsy was 7.7%. Among the more than 207,000 hospitalizations with intractable epilepsy, the prevalence of apnea was 3.62%, the prevalence of arrhythmia was 3.34%, and the prevalence of both was 0.36%. The prevalence trend of apnea, arrhythmia, and both together increased between 2003 and 2014.
“In univariate analysis, prevalence of mortality was highest among patients with arrhythmia,” the researchers reported, at – 3.1% in patients with arrhythmia versus 0.48% in patients with apnea, 2.91% in patients with both, and 0.46% in patients without apnea or arrhythmia.
In a multivariable regression analysis, significant and independent predictors of death included intractable epilepsy (odds ratio, 1.17), apnea (OR, 0.84), arrhythmia (OR, 3.29), and the presence of both apnea and arrhythmia (OR, 3.24). When hospitalization was complicated by intractable epilepsy, the odds of death rose with the presence of apnea (OR, 2.07), arrhythmia (OR, 8.39), and with both apnea and arrhythmia (OR, 11.64).
The results highlight the importance of effective epilepsy management, said first author Urvish K. Patel, MBBS, also with Creighton University. “If we can stop [conversion to intractable epilepsy], then this odds ratio can go down.”
Attention to arrhythmias, as well as the combination of arrhythmias and apnea, may “be important in identifying patients at risk for SUDEP,” the authors concluded.
The researchers had no disclosures and reported receiving no outside funding for their work.
SOURCE: Patel UK et al. AES 2019, Abstract 2.140.
BALTIMORE – Patients hospitalized for epilepsy may have higher odds of death if they have a secondary diagnosis of arrhythmia, whereas the presence of apnea alone may not significantly increase mortality, according to an analysis of data from the Nationwide Inpatient Sample presented at the annual meeting of the American Epilepsy Society.
“If you have someone with arrhythmia and epilepsy, you have to be more concerned about possible SUDEP [sudden unexpected death in epilepsy],” relative to someone with apnea and epilepsy, said senior study author Sanjay P. Singh, MD, professor of neurology at Creighton University, Omaha, Neb.
Research indicates that apnea and cardiac arrhythmias may contribute to SUDEP, and the incidence of SUDEP is higher in patients with intractable epilepsy.
To identify the prevalence of apnea, arrhythmia, and both conditions in epilepsy hospitalizations, as well as the prevalence of intractable epilepsy and mortality, Dr. Singh and colleagues performed a retrospective, cross-sectional analysis of pediatric and adult epilepsy hospitalizations between 2003 and 2014 in the Nationwide Inpatient Sample. They determined apnea and arrhythmia diagnoses using ICD-9-CM codes.
Among more than 2.6 million epilepsy hospitalizations, the prevalence of apnea was 2.75%, the prevalence of arrhythmia was 8.91%, and the prevalence of both was 0.49%. The proportion of patients with intractable epilepsy was 7.7%. Among the more than 207,000 hospitalizations with intractable epilepsy, the prevalence of apnea was 3.62%, the prevalence of arrhythmia was 3.34%, and the prevalence of both was 0.36%. The prevalence trend of apnea, arrhythmia, and both together increased between 2003 and 2014.
“In univariate analysis, prevalence of mortality was highest among patients with arrhythmia,” the researchers reported, at – 3.1% in patients with arrhythmia versus 0.48% in patients with apnea, 2.91% in patients with both, and 0.46% in patients without apnea or arrhythmia.
In a multivariable regression analysis, significant and independent predictors of death included intractable epilepsy (odds ratio, 1.17), apnea (OR, 0.84), arrhythmia (OR, 3.29), and the presence of both apnea and arrhythmia (OR, 3.24). When hospitalization was complicated by intractable epilepsy, the odds of death rose with the presence of apnea (OR, 2.07), arrhythmia (OR, 8.39), and with both apnea and arrhythmia (OR, 11.64).
The results highlight the importance of effective epilepsy management, said first author Urvish K. Patel, MBBS, also with Creighton University. “If we can stop [conversion to intractable epilepsy], then this odds ratio can go down.”
Attention to arrhythmias, as well as the combination of arrhythmias and apnea, may “be important in identifying patients at risk for SUDEP,” the authors concluded.
The researchers had no disclosures and reported receiving no outside funding for their work.
SOURCE: Patel UK et al. AES 2019, Abstract 2.140.
REPORTING FROM AES 2019
High infantile spasm risk should contraindicate sodium channel blocker antiepileptics
BALTIMORE – “This is scary and warrants caution,” said senior investigator and pediatric neurologist Shaun Hussain, MD, a pediatric neurologist at Mattel Children’s Hospital at UCLA. Because of the findings, “we are avoiding the use of voltage-gated sodium channel blockade in any child at risk for infantile spasms. More broadly, we are avoiding [them] in any infant if there is a good alternative medication, of which there are many in most cases.”
There have been a few previous case reports linking voltage-gated sodium channel blockers (SCBs) – which include oxcarbazepine, carbamazepine, lacosamide, and phenytoin – to infantile spasms, but they are still commonly used for infant seizures. There was some disagreement at UCLA whether there really was a link, so Dr. Hussain and his team took a look at the university’s experience. They matched 50 children with nonsyndromic epilepsy who subsequently developed video-EEG confirmed infantile spasms (cases) to 50 children who also had nonsyndromic epilepsy but did not develop spasms, based on follow-up duration and age and date of epilepsy onset.
The team then looked to see what drugs they had been on; it turned out that cases and controls were about equally as likely to have been treated with any specific antiepileptic, including SCBs. Infantile spasms were substantially more likely with SCB exposure in children with spasm risk factors, which also include focal cortical dysplasia, Aicardi syndrome, and other problems (HR 7.0; 95%; CI 2.5-19.8; P less than .001). Spasms were also more likely among even low-risk children treated with SCBs, although the trend was not statistically significant.
In the end, “we wonder how many cases of infantile spasms could [have been] prevented entirely if we had avoided sodium channel blockade,” Dr. Hussain said at the annual meeting of the American Epilepsy Society.
With so many other seizure options available – levetiracetam, topiramate, and phenobarbital, to name just a few – maybe it would be best “to stay away from” SCBs entirely in “infants with any form of epilepsy,” said lead investigator Jaeden Heesch, an undergraduate researcher who worked with Dr. Hussain.
It is unclear why SCBs increase infantile spasm risk; maybe nonselective voltage-gated sodium channel blockade interferes with proper neuron function in susceptible children, similar to the effects of sodium voltage-gated channel alpha subunit 1 mutations in Dravet syndrome, Dr. Hussain said. Perhaps the findings will inspire drug development. “If nonselective sodium channel blockade is bad, perhaps selective modulation of voltage-gated sodium currents [could be] beneficial or protective,” he said.
The age of epilepsy onset in the study was around 2 months. Children who went on to develop infantile spasms had an average of almost two seizures per day, versus fewer than one among controls, and were on an average of two, versus about 1.5 antiepileptics. The differences were not statistically significant.
The study looked at SCB exposure overall, but it’s possible that infantile spasm risk differs among the various class members.
The work was funded by the Elsie and Isaac Fogelman Endowment, the Hughes Family Foundation, and the UCLA Children’s Discovery and Innovation Institute. The investigators didn’t have any relevant disclosures.
SOURCE: Heesch J et al. AES 2019. Abstract 2.234.
BALTIMORE – “This is scary and warrants caution,” said senior investigator and pediatric neurologist Shaun Hussain, MD, a pediatric neurologist at Mattel Children’s Hospital at UCLA. Because of the findings, “we are avoiding the use of voltage-gated sodium channel blockade in any child at risk for infantile spasms. More broadly, we are avoiding [them] in any infant if there is a good alternative medication, of which there are many in most cases.”
There have been a few previous case reports linking voltage-gated sodium channel blockers (SCBs) – which include oxcarbazepine, carbamazepine, lacosamide, and phenytoin – to infantile spasms, but they are still commonly used for infant seizures. There was some disagreement at UCLA whether there really was a link, so Dr. Hussain and his team took a look at the university’s experience. They matched 50 children with nonsyndromic epilepsy who subsequently developed video-EEG confirmed infantile spasms (cases) to 50 children who also had nonsyndromic epilepsy but did not develop spasms, based on follow-up duration and age and date of epilepsy onset.
The team then looked to see what drugs they had been on; it turned out that cases and controls were about equally as likely to have been treated with any specific antiepileptic, including SCBs. Infantile spasms were substantially more likely with SCB exposure in children with spasm risk factors, which also include focal cortical dysplasia, Aicardi syndrome, and other problems (HR 7.0; 95%; CI 2.5-19.8; P less than .001). Spasms were also more likely among even low-risk children treated with SCBs, although the trend was not statistically significant.
In the end, “we wonder how many cases of infantile spasms could [have been] prevented entirely if we had avoided sodium channel blockade,” Dr. Hussain said at the annual meeting of the American Epilepsy Society.
With so many other seizure options available – levetiracetam, topiramate, and phenobarbital, to name just a few – maybe it would be best “to stay away from” SCBs entirely in “infants with any form of epilepsy,” said lead investigator Jaeden Heesch, an undergraduate researcher who worked with Dr. Hussain.
It is unclear why SCBs increase infantile spasm risk; maybe nonselective voltage-gated sodium channel blockade interferes with proper neuron function in susceptible children, similar to the effects of sodium voltage-gated channel alpha subunit 1 mutations in Dravet syndrome, Dr. Hussain said. Perhaps the findings will inspire drug development. “If nonselective sodium channel blockade is bad, perhaps selective modulation of voltage-gated sodium currents [could be] beneficial or protective,” he said.
The age of epilepsy onset in the study was around 2 months. Children who went on to develop infantile spasms had an average of almost two seizures per day, versus fewer than one among controls, and were on an average of two, versus about 1.5 antiepileptics. The differences were not statistically significant.
The study looked at SCB exposure overall, but it’s possible that infantile spasm risk differs among the various class members.
The work was funded by the Elsie and Isaac Fogelman Endowment, the Hughes Family Foundation, and the UCLA Children’s Discovery and Innovation Institute. The investigators didn’t have any relevant disclosures.
SOURCE: Heesch J et al. AES 2019. Abstract 2.234.
BALTIMORE – “This is scary and warrants caution,” said senior investigator and pediatric neurologist Shaun Hussain, MD, a pediatric neurologist at Mattel Children’s Hospital at UCLA. Because of the findings, “we are avoiding the use of voltage-gated sodium channel blockade in any child at risk for infantile spasms. More broadly, we are avoiding [them] in any infant if there is a good alternative medication, of which there are many in most cases.”
There have been a few previous case reports linking voltage-gated sodium channel blockers (SCBs) – which include oxcarbazepine, carbamazepine, lacosamide, and phenytoin – to infantile spasms, but they are still commonly used for infant seizures. There was some disagreement at UCLA whether there really was a link, so Dr. Hussain and his team took a look at the university’s experience. They matched 50 children with nonsyndromic epilepsy who subsequently developed video-EEG confirmed infantile spasms (cases) to 50 children who also had nonsyndromic epilepsy but did not develop spasms, based on follow-up duration and age and date of epilepsy onset.
The team then looked to see what drugs they had been on; it turned out that cases and controls were about equally as likely to have been treated with any specific antiepileptic, including SCBs. Infantile spasms were substantially more likely with SCB exposure in children with spasm risk factors, which also include focal cortical dysplasia, Aicardi syndrome, and other problems (HR 7.0; 95%; CI 2.5-19.8; P less than .001). Spasms were also more likely among even low-risk children treated with SCBs, although the trend was not statistically significant.
In the end, “we wonder how many cases of infantile spasms could [have been] prevented entirely if we had avoided sodium channel blockade,” Dr. Hussain said at the annual meeting of the American Epilepsy Society.
With so many other seizure options available – levetiracetam, topiramate, and phenobarbital, to name just a few – maybe it would be best “to stay away from” SCBs entirely in “infants with any form of epilepsy,” said lead investigator Jaeden Heesch, an undergraduate researcher who worked with Dr. Hussain.
It is unclear why SCBs increase infantile spasm risk; maybe nonselective voltage-gated sodium channel blockade interferes with proper neuron function in susceptible children, similar to the effects of sodium voltage-gated channel alpha subunit 1 mutations in Dravet syndrome, Dr. Hussain said. Perhaps the findings will inspire drug development. “If nonselective sodium channel blockade is bad, perhaps selective modulation of voltage-gated sodium currents [could be] beneficial or protective,” he said.
The age of epilepsy onset in the study was around 2 months. Children who went on to develop infantile spasms had an average of almost two seizures per day, versus fewer than one among controls, and were on an average of two, versus about 1.5 antiepileptics. The differences were not statistically significant.
The study looked at SCB exposure overall, but it’s possible that infantile spasm risk differs among the various class members.
The work was funded by the Elsie and Isaac Fogelman Endowment, the Hughes Family Foundation, and the UCLA Children’s Discovery and Innovation Institute. The investigators didn’t have any relevant disclosures.
SOURCE: Heesch J et al. AES 2019. Abstract 2.234.
REPORTING FROM AES 2019