{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T12:56:16Z","timestamp":1789995376009,"version":"4.0.1"},"reference-count":37,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2025,1,3]],"date-time":"2025-01-03T00:00:00Z","timestamp":1735862400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["DFG"],"award-info":[{"award-number":["DFG"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["SFB1315"],"award-info":[{"award-number":["SFB1315"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["FOR3004"],"award-info":[{"award-number":["FOR3004"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Annals of Neurology"],"published-print":{"date-parts":[[2025,3]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>Monoallelic variants in the transient receptor potential melastatin\u2010related type 3 gene (<jats:italic>TRPM3<\/jats:italic>) have been associated with neurodevelopmental manifestations, but knowledge on the clinical manifestations and treatment options is limited. We characterized the clinical spectrum, highlighting particularly the epilepsy phenotype, and the effect of treatments.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We analyzed retrospectively the phenotypes and genotypes of 43 individuals with <jats:italic>TRPM3<\/jats:italic> variants, acquired from GeneMatcher and collaborations (n\u2009=\u200921), and through a systematic literature search (n\u2009=\u200922). We included all patients with a pathogenic <jats:italic>TRPM3<\/jats:italic> variant.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The median age at the time of the study was 10\u2009years, with a preponderance of girls (60%) versus boys (40%). Frequent findings were developmental delay and\/or intellectual disability (93%), global or axial hypotonia (77%), ocular involvement (70%), musculoskeletal anomalies (65%), and dysmorphic features (58%). Epilepsy was diagnosed in 31 patients (72%), classified in all as developmental and epileptic encephalopathy with or without spike wave activation in sleep (DEE\/DEE\u2010SWAS). Patients with the variant p.Val1002Met (n\u2009=\u200924) significantly more often had developmental delay and epilepsy. The most effective anti\u2010seizure medication was primidone. All treated patients showed an improvement in seizure frequency, motor and speech development, and\/or learning capability with this drug.<\/jats:p><\/jats:sec><jats:sec><jats:title>Interpretation<\/jats:title><jats:p>Developmental delay\/intellectual disability and epilepsy are dominant phenotypic features in patients with <jats:italic>TRPM3<\/jats:italic> variants. Given that epilepsy can negatively impact development, screening for awake and sleep electroencephalogram abnormalities and other manifestations are essential to offer early intervention. The TRPM3 channel blocker primidone has shown promising effects and should be considered in every child with a <jats:italic>TRPM3<\/jats:italic> gain\u2010of\u2010function variant. ANN NEUROL 2025;97:561\u2013570<\/jats:p><\/jats:sec>","DOI":"10.1002\/ana.27141","type":"journal-article","created":{"date-parts":[[2025,1,3]],"date-time":"2025-01-03T11:28:13Z","timestamp":1735903693000},"page":"561-570","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Phenotype Spectrum of <scp>TRPM3<\/scp>\u2010Associated Disorders"],"prefix":"10.1002","volume":"97","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-1234-4411","authenticated-orcid":false,"given":"Laura","family":"Jolitz","sequence":"first","affiliation":[{"name":"Department of Pediatric Neurology Charit\u00e9\u2013Universit\u00e4tsmedizin Berlin  Berlin Germany"},{"name":"Center for Chronically Sick Children Charit\u00e9\u2013Universit\u00e4tsmedizin Berlin  Berlin Germany"},{"name":"Institute for Cell Biology and Neurobiology Charit\u00e9\u2013Universit\u00e4tsmedizin Berlin  Berlin Germany"},{"name":"Section CNS Development and Neurologic 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