Epilepsy Research最新文献

{"title":"Corrigendum to \"Long-term outcome and predictors of vagus nerve stimulation for drug-resistant epilepsy: Real-world evidence from the Korean National Hospital Consortium\" [Epilepsy Res. 210 (2025) 107511 0920-1211].","authors":"Seo-Young Lee, Hyesung Lee, Jae-Wook Cho, Kyung Wook Kang, Jong-Geun Seo, Jon Soo Kim, Joon-Won Kang, Daeyoung Kim, Young-Soo Kim, Sun Ah Choi, Jeonghoon Park, Ji Hoon Phi, Sang Ook Nam, Won Seop Kim, Jae-Moon Kim, Ki Joong Kim","doi":"10.1016/j.eplepsyres.2025.107522","DOIUrl":"https://doi.org/10.1016/j.eplepsyres.2025.107522","url":null,"abstract":"","PeriodicalId":11914,"journal":{"name":"Epilepsy Research","volume":" ","pages":"107522"},"PeriodicalIF":2.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143448619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of the phenotype and functional alternations of three HCN1 variants in Chinese epilepsy patients","authors":"Ziyao Han,&nbsp;Lingling Xie,&nbsp;Xiaorui Liu,&nbsp;Jiaxin Yang,&nbsp;Hanyu Luo,&nbsp;Ran Ding,&nbsp;Hengsheng Chen,&nbsp;Li Cheng,&nbsp;Zhixu Fang,&nbsp;Li Jiang","doi":"10.1016/j.eplepsyres.2025.107521","DOIUrl":"10.1016/j.eplepsyres.2025.107521","url":null,"abstract":"<div><h3>Purpose</h3><div>To evaluate the electrophysiological properties of three <em>HCN1</em> variant sites found in Chinese epileptic patients and to explore the potential relationship between genotype and phenotype.</div></div><div><h3>Methods</h3><div>We correlated clinical severity of three patients with <em>HCN1</em> variants with whole-cell patch-clamp measurements of channel activity, channel expression detected by Western blot, and bioinformatics prediction of the damaging effects of each variant.</div></div><div><h3>Results</h3><div>Three patients with the variants p.L400P, p.D534H and p.M243delinsTL, showed different phenotypes, ranging from mild epilepsy to severe epileptic encephalopathy. Variants L400P and D534H were classified as pathogenic by all bioinformatics tools, and variant M243delinsTL was classified as a polymorphism by MutationTaster. The L400P and D534H variants showed significantly reduced current compared with that of the wild-type (WT), while the current density of M243delinsTL was similar to WT. The half-activation voltage (V_1/2) of M243delinsTL variant was shifted in the hyperpolarizing direction when compared to the WT, and the slope factor (k) of activation of the M243delinsTL variant was significantly lower than that of the WT. The L400P variant was associated with a significantly higher activation time constant compared with that of the WT. In addition, quantitative detection of the FLAG-tagged <em>HCN1</em> channel revealed that the expression level of the L400P variant was significantly decreased compared to WT.</div></div><div><h3>Conclusions</h3><div>Elucidation of the type and location of variant sites combined with the use of bioinformatics tools and patch-clamp techniques can improve our understanding of the clinical phenotype of epilepsy associated with <em>HCN1</em> variants.</div></div>","PeriodicalId":11914,"journal":{"name":"Epilepsy Research","volume":"211 ","pages":"Article 107521"},"PeriodicalIF":2.0,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long-term outcome and predictors of vagus nerve stimulation for drug-resistant epilepsy: Real-world evidence from the Korean national hospital consortium","authors":"Seo-Young Lee ,&nbsp;Hyesung Lee ,&nbsp;Jae-Wook Cho ,&nbsp;Kyung Wook Kang ,&nbsp;Jong-Geun Seo ,&nbsp;Jon Soo Kim ,&nbsp;Joon-Won Kang ,&nbsp;Daeyoung Kim ,&nbsp;Young-Soo Kim ,&nbsp;Sun Ah Choi ,&nbsp;Jeonghoon Park ,&nbsp;Ji Hoon Phi ,&nbsp;Sang Ook Nam ,&nbsp;Won Seop Kim ,&nbsp;Jae-Moon Kim ,&nbsp;Ki Joong Kim ,&nbsp;Korean National Hospital Consortium for VNS Outcome Study","doi":"10.1016/j.eplepsyres.2025.107511","DOIUrl":"10.1016/j.eplepsyres.2025.107511","url":null,"abstract":"<div><h3>Objective</h3><div>This study aimed to assess the long-term outcome and prognostic factors of vagus nerve stimulation (VNS) for drug-resistant epilepsy (DRE) using real-world data.</div></div><div><h3>Method</h3><div>We included 189 DRE patients who underwent VNS implantation between 2005 and 2018 at nine national hospitals in Korea. Seizure-frequency data obtained quarterly one year before and after surgery and annually up to four years after surgery were collected from medical records. Health resource utilization trends over the four years preceding and following surgery were assessed through linkage with national health insurance data. We performed interrupted time series analysis to examine the trend in seizure frequency before and after one year following surgery.</div></div><div><h3>Results</h3><div>The seizure frequency exhibited a decreasing trend in 27.5 % and an increasing trend in 3.8 % during the first year following VNS implantation without a significant change in efficacy over the subsequent three years. Patients with focal spikes with secondary bilateral synchrony (SBS) in electroencephalography had a higher responder rate (adjusted odds ratio (aOR)= 3.06 [1.36–6.90]), whereas those with Lennox-Gastaut syndrome had a lower responder rate (aOR=0.38 [0.15–0.94]). One-year seizure-freedom was achieved in 6.0 % of patients at some point during the four-year follow-up. Over an eight-year period, the number of antiseizure medications (ASMs) tended to increase before surgery and remained at a median of 5 [4−6] after surgery. While the total medical and epilepsy-related costs tended to decrease after surgery, the ASM cost continued to increase.</div></div><div><h3>Conclusion</h3><div>VNS was substantially beneficial for one in four patients with DRE, offering the chance of seizure-freedom. However, the efficacy of VNS fell within the efficacy range of recently introduced medical treatments and did not lead to a decrease in the ASM burden. Focal spike with SBS is a potential biomarker for a favorable response to VNS.</div></div>","PeriodicalId":11914,"journal":{"name":"Epilepsy Research","volume":"210 ","pages":"Article 107511"},"PeriodicalIF":2.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143028344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The significance of interictal electroencephalogram analysis based on the grand total electroencephalogram score in early assessment of cognitive impairment in epilepsy patients","authors":"Honghua Chen,&nbsp;Lingli Ju,&nbsp;Yanyan Ji,&nbsp;Lihong Tao","doi":"10.1016/j.eplepsyres.2025.107506","DOIUrl":"10.1016/j.eplepsyres.2025.107506","url":null,"abstract":"<div><h3>Purpose</h3><div>Epilepsy is a widespread neurological disorder that increases the risk of cognitive impairment (CI) or dementia. We aimed to assess the relationship between cognition and interictal electroencephalogram (EEG) in epilepsy patients, using the Grand Total EEG (GTE) score. Additionally, we investigated the GTE score's utility in the early detection of CI in these patients.</div></div><div><h3>Methods</h3><div>Data from 93 patients diagnosed with unexplained epilepsy at the Affiliated Hospital of Yangzhou University were analyzed. EEG recordings and cognitive evaluations were performed. Patients were categorized into three groups based on their Montreal Cognitive Assessment (MoCA) scores: normal cognitive (NC) group, mild cognitive impairment (MCI) group, and dementia group. The study included analysis of correlations between cognitive test results and clinical characteristics. Additionally, the influence of GTE scores and subscores on cognition was examined. Statistical analyses included one-way analysis of variance (ANOVA), Kruskal-Wallis H-test, Mann-Whitney U-test, Chi-square test, Spearman rank correlation analysis, and multiple linear regression.</div></div><div><h3>Results</h3><div>(1) There was a significant negative correlation between cognitive test scores and GTE scores. Strong negative correlations were found between cognition (MoCA) and the GTE score (ρ = −0.754, P &lt; 0.001), as well as for the subscores \"Diffuse Slow Activity\" (ρ = −0.712, P &lt; 0.001), \"Frequency of Rhythmic Background Activity\" (ρ = −0.490, P &lt; 0.001), and \"Paroxysmal Activity\" (ρ = −0.565, P &lt; 0.001). (2) Multiple linear regression analysis identified the GTE score, \"Diffuse Slow Activity\", \"Paroxysmal Activity\", age, and education as significant predictors of cognitive decline. (3) At a threshold of 4.5, the GTE score effectively differentiated between individuals with and without CI, demonstrating a sensitivity of 73.8 % and a specificity of 93.7 %.</div></div><div><h3>Conclusion</h3><div>The GTE score provides clinically valuable information for the early detection of CI in patients with epilepsy. As CI worsens in epilepsy patients, the GTE score, Diffuse Slow Activity, Frequency of Rhythmic Background Activity, and Paroxysmal Activity increase. Healthcare providers should focus on managing not only seizures but also interictal EEG abnormalities to prevent or mitigate the risk of CI.</div></div>","PeriodicalId":11914,"journal":{"name":"Epilepsy Research","volume":"210 ","pages":"Article 107506"},"PeriodicalIF":2.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143022648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel insights regarding haemodynamics in focal seizures","authors":"Boriana S. Gagaouzova ,&nbsp;Ineke A. van Rossum ,&nbsp;Jorien van Hoey Smith ,&nbsp;Frederik J. de Lange ,&nbsp;Roland D. Thijs ,&nbsp;J. Gert van Dijk","doi":"10.1016/j.eplepsyres.2025.107513","DOIUrl":"10.1016/j.eplepsyres.2025.107513","url":null,"abstract":"<div><h3>Introduction</h3><div>We explored the temporal patterns of haemodynamic parameters in four seizures of three patients using the log-ratio method.</div></div><div><h3>Methods</h3><div>We identified three subjects who experienced a seizure during a tilt table test: one had two focal impaired awareness seizures (FIAS, seizures#1 and#2), one had one FIAS (#3), and one had a focal to bilateral tonic-clonic seizure (fbTCS, seizure#4). Recordings included video, heart rate (HR) and continuous blood pressure (BP). We used the log-ratio method to determine the relative contributions of HR, stroke volume (SV), and total peripheral resistance (TPR) to mean arterial pressure (MAP). A 'phase' was defined as a temporary departure of MAP, HR, SV or TPR from baseline.</div></div><div><h3>Results</h3><div>BP showed a decrease in all four seizures. We observed one phase with synchronous events for all haemodynamic variables during seizures 1&amp;2; seizure#3 showed one phase for MAP and TPR, three phases for HR, and only one for SV. Seizure#4 showed no autonomic involvement during the first minute of the focal seizure, after which MAP and HR showed an asynchronous triphasic course until the signal was lost when a tonic-clonic seizure occurred.</div></div><div><h3>Conclusion</h3><div>This chance sample illustrates that haemodynamic variables may change in different directions and asynchronously during focal seizures. We speculate that these complex autonomic patterns represent different ictal propagation pathways and that they may include ictal as well as corrective changes. BP decreased in all four seizures while the literature reports BP increases. As our patients were upright, not supine, we hypothesise that ictal haemodynamic changes impair normal control and are therefore likely to cause hypotension in the upright position.</div></div>","PeriodicalId":11914,"journal":{"name":"Epilepsy Research","volume":"210 ","pages":"Article 107513"},"PeriodicalIF":2.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"4-Phenylbutyrate restored GABA uptake, mitigated seizures in SLC6A1 and SLC6A11 microdeletions/3p- syndrome: From cellular models to human patients","authors":"Melissa B. DeLeeuw ,&nbsp;Wangzhen Shen ,&nbsp;Xiaojuan Tian ,&nbsp;Changhong Ding ,&nbsp;Karishma Randhave ,&nbsp;Jing-Qiong Kang","doi":"10.1016/j.eplepsyres.2025.107514","DOIUrl":"10.1016/j.eplepsyres.2025.107514","url":null,"abstract":"<div><h3>Background</h3><div>Haploinsufficient deletions of GABA transporter 1 (GAT-1)- encoding <em>SLC6A1</em>, and GABA transporter 3 (GAT-3)-encoding <em>SLC6A11</em> are implicated in epileptic syndromes. Despite their significance, the impact of these deletions has not been characterized. Our previous work on <em>SLC6A1</em> missense mutations prompted a clinical trial for Ravicti (NCT04937062), a glycerol formulation of 4-phenylbutyrate (PBA), for treatment-resistant epilepsy. We observed phenotypic overlap between trial-eligible <em>SLC6A1</em> mutation patients and 3p- syndrome patients carrying deletions of <em>SLC6A1</em> and <em>SLC6A11</em>. This study characterizes the functional impact of these deletions and assesses the urgent question of whether 3p- syndrome patients could benefit from this treatment.</div></div><div><h3>Methods</h3><div>Chromosomal microarray analysis identified a deletion affecting one allele of both <em>SLC6A1</em> and <em>SLC6A11</em> in two pediatric patients with 3p- syndrome. Clinical phenotyping included electroencephalogram (EEG) recordings and neurodevelopmental assessments. Functional characterization was conducted using ³H-labeled GABA uptake assays and Western blotting in HEK293T cells, comparing haploinsufficient and missense variant models.</div></div><div><h3>Results</h3><div>The haploinsufficient GAT-1 and GAT-3 conditions demonstrated reduced GABA uptake and protein expression, comparable to known <em>SLC6A1</em> missense variants. Post-treatment EEGs showed a moderate reduction in epileptiform discharges following PBA administration, and patients exhibited improved motor function. However, varying degrees of cognitive impairments persisted.</div></div><div><h3>Conclusions</h3><div>Haploinsufficiency of <em>SLC6A1</em> and <em>SLC6A11</em> contributes to the epileptic phenotypes observed in 3p- syndrome, marking this as the first study to biochemically characterize the functional impact of these deletions. Treatment with PBA may provide therapeutic benefits, particularly for addressing seizures and motor deficits, though further exploration of PBA’s long-term effects in patients with 3p- syndrome is warranted.</div></div>","PeriodicalId":11914,"journal":{"name":"Epilepsy Research","volume":"210 ","pages":"Article 107514"},"PeriodicalIF":2.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Use of benzodiazepines in patients with status epilepticus requiring second-line antiseizure medication treatment","authors":"Teemu Pöytäkangas ,&nbsp;Pabitra Basnyat ,&nbsp;Sirpa Rainesalo ,&nbsp;Jukka Peltola ,&nbsp;Jukka T. Saarinen","doi":"10.1016/j.eplepsyres.2025.107507","DOIUrl":"10.1016/j.eplepsyres.2025.107507","url":null,"abstract":"<div><h3>Background</h3><div>Status epilepticus (SE) is a life-threatening state that needs rapid and adequate treatment. Benzodiazepines (BZD) are used as a first-line treatment for SE, and if the desired effect is not achieved, second-line antiseizure medications are used.</div></div><div><h3>Objective</h3><div>To investigate whether the treatment with BZDs is performed adequately in patients with different subtypes of SE requiring second-line ASM treatment and, if not, to identify the factors influencing the suboptimal treatment.</div></div><div><h3>Patients and methods</h3><div>This is a retrospective single centre study from the patient register of Tampere University Hospital including patients over 16 years of age with a diagnosis of SE, seizure or epilepsy and who received intravenous (IV) ASM during a one-year period in 2015. Treatment was considered to be suboptimal if it was not in line with the latest European, Finnish or American guidelines.</div></div><div><h3>Results</h3><div>In total, 109 episodes were registered. The largest group was that with convulsive SE with 56 episodes, followed by postictal with 23 episodes, nonconvulsive status epilepticus (NCSE) with 22 episodes, and focal awareness SE (FASE) with eight episodes. Overall, in 77 % of the episodes, BZDs were administered, and in 43 % of the episodes, treatment was in line with guidelines. In the NCSE group, BZD was administered less often and was less often in line with the guidelines than in the CSE group (27.3 % vs. 89.3 %, p &lt; 0.001 and 4.5 % vs. 55.4 %, p &lt; 0.001). For FASE episodes, the concordance with the guidelines was low. After IV administration, the mean BZD dose was lower than that after buccal administration of midazolam (2.1 mg vs. 8.7 mg) or after rectal administration of diazepam (4.5 mg vs. 10.0 mg). Lorazepam was administered only via the IV route, with mean dosage of 2.6 mg. Clinical characteristics did not influence the dosing of BZDs.</div></div><div><h3>Conclusions</h3><div>BZDs were both underdosed and underused for all subtypes of SE. In particular, their use for NCSE was infrequent and suboptimal. The divergence from the guidelines was influenced especially by low IV dosages.</div></div>","PeriodicalId":11914,"journal":{"name":"Epilepsy Research","volume":"210 ","pages":"Article 107507"},"PeriodicalIF":2.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142970201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to \"Significant reduction of seizure frequency in patients with drug-resistant epilepsy by vagus nerve stimulation: Systematic review and meta-analysis\" [Epilepsy Res. 210 (2025) 107510].","authors":"Malaisamy Muniyandi, Karthick Chelvanayagam, Sahil Abdul Salam, Sathishkumar Vadamalai, Kavitha Rajsekar, Rajeswari Ramachandran","doi":"10.1016/j.eplepsyres.2025.107519","DOIUrl":"https://doi.org/10.1016/j.eplepsyres.2025.107519","url":null,"abstract":"","PeriodicalId":11914,"journal":{"name":"Epilepsy Research","volume":" ","pages":"107519"},"PeriodicalIF":2.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143074180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long-term efficacy and safety of perampanel monotherapy in patients with newly diagnosed or currently untreated recurrent focal-onset seizures: Results from the open-label extension phase of FREEDOM (Study 342)","authors":"Takamichi Yamamoto ,&nbsp;Sung Chul Lim ,&nbsp;Hirotomo Ninomiya ,&nbsp;Yuichi Kubota ,&nbsp;Won Chul Shin ,&nbsp;Dong Wook Kim ,&nbsp;Dong Jin Shin ,&nbsp;Koji Iida ,&nbsp;Taku Ochiai ,&nbsp;Risa Matsunaga ,&nbsp;Hidetaka Hiramatsu ,&nbsp;Ji Hyun Kim","doi":"10.1016/j.eplepsyres.2024.107494","DOIUrl":"10.1016/j.eplepsyres.2024.107494","url":null,"abstract":"<div><h3>Objective</h3><div>FREEDOM (Study 342; NCT03201900) assessed the long-term treatment effect of perampanel monotherapy in adolescent and adult patients (12–74 years of age) with untreated focal-onset seizures (FOS), with or without focal to bilateral tonic-clonic seizures (FBTCS).</div></div><div><h3>Methods</h3><div>In the Core Study, after a 4-week Pretreatment Phase, perampanel was up-titrated to 4 mg/day during a 6-week Titration Period followed by a 26-week Maintenance Period. Patients experiencing seizure(s) during the 4-mg/day Maintenance Period could have perampanel up-titrated to 8 mg/day over 4 weeks then could enter the 26-week 8-mg/day Maintenance Period. Patients could enter Extension to continue treatment upon the completion of the Core Study. Seizure-freedom rates, time to seizure recurrence or withdrawal since the initiation of maintenance treatment, and safety outcomes were assessed.</div></div><div><h3>Results</h3><div>In FREEDOM, 89 patients who received ≥ 1 perampanel dose were included for safety assessments (Safety Analysis Set), and 73 of them entered the 4-‍‍‍mg/day Maintenance Period (the modified Intent-to-Treat Analysis set) with 21 patients having perampanel up-titrated to 8 mg/day; 46 patients entered Extension with 38 patients completing. Overall, 42/89 (47.2 %) patients had cumulative exposure to perampanel for &gt; 52 weeks. Among patients who entered Extension, 52.2 % (n = 24/46; 95 % confidence interval [CI] 36.9, 67.1) remained seizure free for 52 weeks at perampanel 4 mg/day and 67.4 % (n = 31/46; 95 % CI 52.0, 80.5) at 4–8 mg/day. The cumulative probabilities of seizure recurrence and withdrawal at 4–8 mg/day over 52 weeks were 28.9 % (95 % CI 19.0, 42.4) and 43.8 % (95 % CI 33.4, 55.9), respectively. Treatment-emergent adverse events (TEAEs) occurred in 74/89 (83.1 %) patients, with 9/89 (10.1 %) discontinuing because of TEAEs. Dizziness occurred in 34/89 (38.2 %) patients and was the most common event.</div></div><div><h3>Conclusions</h3><div>Patients with untreated FOS (with or without FBTCS) are able to maintain seizure freedom for up to 52 weeks with perampanel monotherapy at a dose of 4–8 mg/day. The tolerability profile was manageable, and the safety profile was consistent with previous findings.</div></div>","PeriodicalId":11914,"journal":{"name":"Epilepsy Research","volume":"210 ","pages":"Article 107494"},"PeriodicalIF":2.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142946965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Significant reduction of seizure frequency in patients with drug-resistant epilepsy by vagus nerve stimulation: Systematic review and meta-analysis","authors":"Malaisamy Muniyandi ,&nbsp;Karthick Chelvanayagam ,&nbsp;Sahil Abdul Salam ,&nbsp;Sathishkumar Vadamalai ,&nbsp;Kavitha Rajsekar ,&nbsp;Rajeswari Ramachandran","doi":"10.1016/j.eplepsyres.2025.107510","DOIUrl":"10.1016/j.eplepsyres.2025.107510","url":null,"abstract":"<div><h3>Background</h3><div>Epilepsy is a major neurological disorder, typically managed with Anti-Seizure Medication (ASM). Nevertheless, a substantial 30 % of patients did not respond satisfactorily to ASMs, classifying their condition as Drug-Resistant Epilepsy (DRE). Vagus Nerve Stimulation (VNS) was recommended as a potential solution.</div></div><div><h3>Objective</h3><div>To evaluate clinical efficacy of VNS on patients with DRE in reduction of seizures through a systematic review and meta-analysis using a random effects model.</div></div><div><h3>Methods</h3><div>A systematic search was done from PubMed, ScienceDirect, Cochrane Library and Google Scholar databases on observational studies and randomized controlled trials (RCTs) for the clinical effectiveness of VNS among DRE patients. A meta-analysis was performed to obtain the pooled estimate of the clinical effectiveness of VNS in terms of seizure reduction and the odds ratio (OR) for patients achieving &gt; 50 % seizure reduction. Heterogeneity was assessed using visual inspection of forest plots and I² statistic.</div></div><div><h3>Results</h3><div>A total of 1023 articles were retrieved from the electronic search. After removing duplicates, non-relevance and non-availability of efficacy data, 28 articles were included in the final analysis. Of these, 9 are RCTs and 19 are observational studies. The pooled estimate of &gt; 50 % seizure reduction was 0.46 (95 % CI: 0.40–0.51) and the pooled estimate of the OR comparing &gt; 50 % vs ≤ 50 % seizure reduction was 0.76 (95 % CI: 0.44–1.29).</div></div><div><h3>Conclusion</h3><div>Our meta-analysis showed that 46 % of DRE patients have experienced ≥ 50 % seizure reduction with VNS treatment. It should be considered in patients in whom ASM has failed or who continue to experience seizures after medication.</div></div>","PeriodicalId":11914,"journal":{"name":"Epilepsy Research","volume":"210 ","pages":"Article 107510"},"PeriodicalIF":2.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142983106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}