Drug-resistant epilepsy has a high prevalence worldwide despite efforts such as the Epilepsy Therapy Screening Program conducted by the National Institute of Neurological Disorders and Stroke. It is indicated that drug-resistant epilepsy has various manifestations, and each pattern of manifestation can be modeled using precise experimental models. However, the experimental models used to identify new antiseizure medications to control drug-resistant epilepsy to date do not typically take into account various clinical factors associated with this condition. These factors include comorbidities, sex, age, frequency of seizures and neuroinflammation. It is accordingly necessary to identify the proper characteristics of each type of drug-resistant epilepsy to be mimicked in preclinical models. The use of preclinical models mimicking the characteristics of the different patterns of drug-resistant epilepsy will allow identifying new therapeutic strategies to control this disorder. It is also essential to consider the heterogeneity of clinical factors involved in the condition of drug resistance in epilepsy to get the proper preclinical models.
The lifetime prevalence of epilepsy varies between 3.5 and 10.7 per 1000 individuals in developed countries, and from 0.9 to 74.4 per 1000 individuals in Asia, sub-Saharan Africa, and Latin America. In adolescents, the prevalence of epilepsy is estimated to be 1.5 to 2%.
The purpose of this study was to examine the clinical characteristics of adolescents with epilepsy (AWE) and highlight the differences between childhood-onset epilepsy and adolescent-onset epilepsy. Additionally, the study aimed to assess the level of self-stigma and depression, as well as their impact on adherence to antiseizure medication (ASMs).
This cross-sectional study was conducted at the Epilepsy Clinic at Kasr Al-Ainy Hospitals. Patients underwent a thorough evaluation of their seizure history, as well as completed the Adherence to Refills and Medications Scale (ARMS), Kilifi Stigma Scale for Epilepsy (KSSE), and Patient Health Questionnaire-9 (PHQ-9) to assess depression.
A total of 136 AWE were included in the study, consisting of 82 males and 54 females with a median age of 15 and an interquartile range of 13–17. Most patients (54 %) had focal onset seizures, while the remaining 46 % had generalized onset seizures. Of the total sample, 87 (64 %) achieved seizure control for at least one year and are currently taking ASMs. However, only 60 % of the patients were found to be adherent to their ASMs. Fourteen patients (17.2 %) met the criteria for drug-resistant epilepsy. Interestingly, patients with adolescent-onset epilepsy were significantly more adherent to their ASMs compared to those with childhood-onset epilepsy (P=0.01). Additionally, the adherent group had significantly lower scores on KSSE and PHQ-9 compared to the non-adherent group (P=<0.0001 for each). Furthermore, there was a positive correlation between scores on the KSSE and PHQ-9 (P<0.001).
Depression and self-stigma are significant barriers to adherence among adolescents with epilepsy. These findings highlight the need to involve psychiatrists and epileptologists in epilepsy transition programs.
To describe the changes in Food and Drug Administration (FDA)-approved non-intravenous rescue benzodiazepine (non-IV-rBZD) use and cost after the introduction of intranasal midazolam and intranasal diazepam.
Retrospective descriptive study using the MarketScan Database between the years 2016 and 2022. We considered patients who had at least one non-IV-rBZD prescription before the introduction of intranasal rescue medications and at least one non-IV-rBZD prescription after the introduction of intranasal rescue medications.
There were 4,444 patients (45.8 % female, median (p25-p75) age of 10.0 (5.0–15.0) years). 2,255 of 4,444 (50.7 %) patients switched from rectal diazepam to either intranasal midazolam (1,110 (25.0 %)) or intranasal diazepam (1,145 (25.8 %)) as their last non-IV-rBZD. The change from rectal to intranasal non-IV-rBZDs has been increasing over the years from 2019 to 2022. On multivariable analysis, having a non-IV-rBZD for epilepsy (rather than for other reasons including febrile seizures), the year of the last rescue medication, urban (non-rural) patient’s residence, and certain regions of the United States were the factors most strongly associated with a change from rectal diazepam to intranasal non-IV-rBZDs. After adjusting for inflation, the median (p25-p75) average wholesale price (AWP) of the last non-IV-rBZD was higher than that of the first non-IV-rBZD [702 (406–748) versus 417 (406–426), Wilcoxon signed rank test p < 0.0001)]. This difference was mainly driven by the patients who changed from rectal diazepam to intranasal non-IV-rBZD [748 (714–755) versus 417 (406–426), Wilcoxon signed rank test p < 0.0001)]. After adjusting for inflation, the median (p25-p75) patient cost of the last non-IV-rBZD was higher than that of the first non-IV-rBZD [16 (3–55) versus 12 (6–31), Wilcoxon signed rank test p < 0.0001)]. This difference was mainly driven by the patients who changed from rectal diazepam to intranasal non-IV-rBZD [41 (6–83) versus 12 (6–30), Wilcoxon signed rank test p < 0.0001)].
Approximately half of patients changed from rectal diazepam to intranasal midazolam or intranasal diazepam and that transition has been progressively increasing from the year 2019 to the year 2022. The inflation-adjusted AWP and patient cost increased, especially among those patients who changed from rectal to intranasal rescue medication.
Valid clinical outcome assessments with the ability to capture meaningful aspects of neurodevelopment for individuals with neurogenetic conditions associated with profound functional impairments are lacking, yet critical for clinical care and clinical trial readiness. The purpose of this pilot study was to examine and compare the initial psychometric properties of a series of commonly used standardized and norm-referenced measures of cognition and adaptive functioning as well as alternative measures of neurobehavioral functioning designed to capture responsivity (i.e., alertness, awareness, responsivity to the environment) in those with acquired brain injuries in a sample of individuals with severe to profound functional impairment associated with a neurogenetic etiology. Ten individuals (median age = 7.5 years, IQR = 4.8–11.5, range 4–21; n = 8 male) with severe to profound functional impairment associated with SCN2A-Related Disorder and their parents were included in this study. Parents completed the Vineland Adaptive Behavior Scales, Third Edition Comprehensive Interview (Vineland-3) and the Developmental Profile, Fourth Edition Cognitive Scale (DP-4) and their children completed the Bayley Scales of Infant and Toddler Development Cognitive Scale (Bayley-4; given out of the standardized age-range) and two measures of responsivity, the Coma Recovery Scale, Pediatric and the Rappaport Coma/Near Coma Scale. Results demonstrated exceptionally low skills (median Vineland-3 Adaptive Behavior Composite = 35.5) and frequent floor effects across norm-referenced measures (i.e., Vineland-3, DP-4, Bayley-4); however, raw scores yielded more range and variability and no absolute floor effects. There were also no floor effects on measures of responsivity and findings suggest that these alternative tools may capture more variability in some aspects of neurobehavioral functioning that are critical to higher order cognitive functions, particularly for those with mental-ages below a 12 month-level. Initial evidence of construct validity of all measures in this population was shown. Findings support ongoing investigation of measures of responsivity and identified areas of potential measure modification that may improve applicability for individuals with severe to profound functional impairment associated with neurogenetic as opposed to acquired etiologies.