PMID- 33431266 OWN - NLM STAT- MEDLINE DCOM- 20210729 LR - 20210729 IS - 0035-3787 (Print) IS - 0035-3787 (Linking) VI - 177 IP - 6 DP - 2021 Jun TI - Seizure incidence among neuromyelitis optica spectrum disorder patients. PG - 655-659 LID - S0035-3787(20)30736-0 [pii] LID - 10.1016/j.neurol.2020.08.011 [doi] AB - BACKGROUND: Neuromyelitis optica spectrum disorders (NMOSDs) are a group of neuroinflammatory diseases, which mainly affect the optic nerve and spinal cord. NMOSD is an astrocytic channelopathy involving the aquaporin-4 (AQP4) water channels in the central nervous system. Patients can present with seizure attacks as a first manifestation or relapse. However, compared with multiple sclerosis (MS) or myelin oligodendrocyte glycoprotein encephalomyelitis (MOG-EM), seizure attacks are less frequent in NMOSD. METHODS: In this study, we aimed to find out the incidence of seizure attacks during the disease course of 137 NMOSD patients who were registered in our centre from January 2011 till January 2020. Furthermore, we reviewed the literature for NMOSD cases with seizure attacks during their follow-up, in order to investigate the reason for this low incidence of seizures. RESULTS: Only one of our patients (0.72%) experienced an episode of generalised tonic-clonic seizure during his follow-up. CONCLUSION: Reviewing the literature revealed that although seizures are rare in NMOSD, AQP4 disruption possibly increases the risk of seizure attacks. We therefore concluded that the role of AQP4 in seizures is controversial and needs more investigation. CI - Copyright (c) 2020 Elsevier Masson SAS. All rights reserved. FAU - Etemadifar, M AU - Etemadifar M AD - Department of Neurology, Isfahan University of Medical Sciences, Isfahan, Iran. FAU - Sabeti, F AU - Sabeti F AD - School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran. Electronic address: sabetifateme@yahoo.com. FAU - Khorvash, R AU - Khorvash R AD - School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran. FAU - Mirbagheri, M AU - Mirbagheri M AD - School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran. FAU - Nouri, H AU - Nouri H AD - School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran. FAU - Salari, M AU - Salari M AD - Department of Neurology, Shahid Beheshti University of Medical Sciences, Tehran, Iran. LA - eng PT - Journal Article PT - Review DEP - 20210108 PL - France TA - Rev Neurol (Paris) JT - Revue neurologique JID - 2984779R RN - 0 (Autoantibodies) RN - 0 (Myelin-Oligodendrocyte Glycoprotein) SB - IM MH - Autoantibodies MH - Humans MH - Incidence MH - Myelin-Oligodendrocyte Glycoprotein MH - *Neuromyelitis Optica/complications MH - *Seizures/etiology OTO - NOTNLM OT - Aquaporin 4 OT - Astrocyte OT - Neuromyelitis optica OT - Seizure EDAT- 2021/01/13 06:00 MHDA- 2021/07/30 06:00 CRDT- 2021/01/12 05:48 PHST- 2020/03/27 00:00 [received] PHST- 2020/07/29 00:00 [revised] PHST- 2020/08/28 00:00 [accepted] PHST- 2021/01/13 06:00 [pubmed] PHST- 2021/07/30 06:00 [medline] PHST- 2021/01/12 05:48 [entrez] AID - S0035-3787(20)30736-0 [pii] AID - 10.1016/j.neurol.2020.08.011 [doi] PST - ppublish SO - Rev Neurol (Paris). 2021 Jun;177(6):655-659. doi: 10.1016/j.neurol.2020.08.011. Epub 2021 Jan 8.