{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,18]],"date-time":"2026-03-18T16:18:13Z","timestamp":1773850693514,"version":"3.50.1"},"reference-count":23,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2019,6,18]],"date-time":"2019-06-18T00:00:00Z","timestamp":1560816000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["24591269"],"award-info":[{"award-number":["24591269"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["pathsocjournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["The Journal of Pathology"],"published-print":{"date-parts":[[2019,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Mutations in the <jats:italic>Matrin 3<\/jats:italic> (<jats:italic>MATR3<\/jats:italic>) gene have been identified as a cause of amyotrophic lateral sclerosis (ALS) or vocal cord and pharyngeal weakness with distal myopathy (VCPDM). This study investigated the mechanism by which mutant <jats:italic>MATR3<\/jats:italic> causes multisystem proteinopathy (MSP) including ALS and VCPDM. We first analyzed the muscle pathology of C57BL\/6 mice injected with adeno\u2010associated viruses expressing human WT or mutant (S85C) <jats:italic>MATR3<\/jats:italic>. We next generated transgenic mice that overexpress mutant (S85C) <jats:italic>MATR3<\/jats:italic>, driven by the CMV early enhancer\/chicken \u03b2\u2010actin promoter, and evaluated their clinicopathological features. Intramuscular injection of viruses expressing WT and mutant <jats:italic>MATR3<\/jats:italic> induced similar myogenic changes, including smaller myofibers with internal nuclei, and upregulated p62 and LC3\u2010II. Mutant <jats:italic>MATR3<\/jats:italic> transgenic mice showed decreased body weight and lower motor activity. Muscle histology demonstrated myopathic changes including fiber\u2010size variation, internal nuclei and rimmed vacuoles. Spinal cord histology showed a reduced number of motor neurons, and activation of microglia and astrocytes. Comprehensive proteomic analyses of muscle demonstrated upregulation of proteins related to chaperones, stress response, protein degradation, and nuclear function. Overexpression of WT and mutant <jats:italic>MATR3<\/jats:italic> similarly caused myotoxicity, recapitulating the clinicopathological features of MSP. These models will be helpful for analyzing MSP pathogenesis and for understanding the function of <jats:italic>MATR3<\/jats:italic>. \u00a9 2019 Pathological Society of Great Britain and Ireland. Published by John Wiley &amp; Sons, Ltd.<\/jats:p>","DOI":"10.1002\/path.5289","type":"journal-article","created":{"date-parts":[[2019,5,6]],"date-time":"2019-05-06T15:50:13Z","timestamp":1557157813000},"page":"182-192","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":22,"title":["A mutant <i>MATR3<\/i> mouse model to explain multisystem proteinopathy"],"prefix":"10.1002","volume":"249","author":[{"given":"Xiao","family":"Zhang","sequence":"first","affiliation":[{"name":"Department of Neurology, Graduate School of Medical Sciences Kumamoto University  Kumamoto Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9315-3492","authenticated-orcid":false,"given":"Satoshi","family":"Yamashita","sequence":"additional","affiliation":[{"name":"Department of Neurology, Graduate School of Medical Sciences Kumamoto University  Kumamoto 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