{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,2]],"date-time":"2026-09-02T17:08:12Z","timestamp":1788368892344,"version":"build-2803163510"},"reference-count":34,"publisher":"Oxford University Press (OUP)","issue":"9","license":[{"start":{"date-parts":[[2023,3,22]],"date-time":"2023-03-22T00:00:00Z","timestamp":1679443200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"funder":[{"name":"Inherited Neuropathy Consortium","award":["U54 NS065712"],"award-info":[{"award-number":["U54 NS065712"]}]},{"name":"Rare Disease Clinical Research Network"},{"name":"Office of Rare Disease Research"},{"DOI":"10.13039\/100005202","name":"Muscular Dystrophy Association","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100005202","id-type":"DOI","asserted-by":"publisher"}]},{"name":"CMT association"},{"DOI":"10.13039\/100000065","name":"NINDS","doi-asserted-by":"publisher","award":["5 T32 NS 7338-32"],"award-info":[{"award-number":["5 T32 NS 7338-32"]}],"id":[{"id":"10.13039\/100000065","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,9,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Recessive SH3TC2 variants cause Charcot-Marie-Tooth disease type 4C (CMT4C). CMT4C is typically a sensorimotor demyelinating polyneuropathy, marked by early onset spinal deformities, but its clinical characteristics and severity are quite variable. Clear relationships between pathogenic variants and the spectrum of disease manifestations are to date lacking. Gene replacement therapy has been shown to ameliorate the phenotype in a mouse model of CMT4C, emphasizing the need for natural history studies to inform clinical trial readiness.<\/jats:p>\n                  <jats:p>Data, including both genetic information and clinical characteristics, were compiled from the longitudinal, prospective dataset of the Inherited Neuropathy Consortium, a member of the Rare Diseases Clinical Research Network (INC-RDCRN). The Charcot Marie Tooth Neuropathy Score (CMTNS), Examination Score (CMTES) and the Rasch-weighted CMTES (CMTES-R) were used to describe symptoms, neurological examinations and neurophysiological characteristics. Standardized response means were calculated at yearly intervals and a mixed model for repeated measures was used to estimate the change in CMTES and CMTES-R over time.<\/jats:p>\n                  <jats:p>Fifty-six individuals (59% female), median age 27 years (range 2\u201367 years) with homozygous or compound heterozygous variants in SH3TC2 were identified, including 34 unique variants, 14 of which have not previously been published. Twenty-eight participants had longitudinal data available. While there was no significant difference in the CMTES in those with protein truncating versus non-protein truncating variants, there were significant differences in the mean ulnar nerve compound muscle action potential amplitude, the mean radial sensory nerve action potential amplitude, and in the prevalence of scoliosis, suggesting the possibility of a milder phenotype in individuals with one or two non-protein-truncating variants. Overall, the mean value of the CMTES was 13, reflecting moderate clinical severity. There was a high rate of scoliosis (81%), scoliosis surgery (36%), and walking difficulty (94%) among study participants. The CMTES and CMTES-R appeared moderately responsive to change over extended follow-up, demonstrating a standardized response mean of 0.81 standard deviation units or 0.71 standard deviation units, respectively, over 3 years.<\/jats:p>\n                  <jats:p>Our analysis represents the largest cross-sectional and only longitudinal study to date, of the clinical phenotype of both adults and children with CMT4C. With the promise of upcoming genetic treatments, these data will further define the natural history of the disease and inform study design in preparation for clinical trials.<\/jats:p>","DOI":"10.1093\/brain\/awad095","type":"journal-article","created":{"date-parts":[[2023,3,20]],"date-time":"2023-03-20T19:35:05Z","timestamp":1679340905000},"page":"3826-3835","source":"Crossref","is-referenced-by-count":25,"title":["Neuropathy due to bi-allelic SH3TC2 variants: genotype-phenotype correlation and natural history"],"prefix":"10.1093","volume":"146","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5815-0907","authenticated-orcid":false,"given":"Tyler","family":"Rehbein","sequence":"first","affiliation":[{"name":"Department of Neurology, University of Rochester , Rochester, NY 14642 , USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tong Tong","family":"Wu","sequence":"additional","affiliation":[{"name":"Department of Biostatistics and Computational Biology, University of Rochester , Rochester, NY 14642 , USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Simona","family":"Treidler","sequence":"additional","affiliation":[{"name":"Department of Neurology, Stony Brook University , Stony Brook, NY 11790 , USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6854-765X","authenticated-orcid":false,"given":"Davide","family":"Pareyson","sequence":"additional","affiliation":[{"name":"Unit of Rare Neurodegenerative and Neurometabolic Diseases, Department of Clinical Neurosciences, Fondazione IRCCS Istituto Neurologico Carlo Besta , 20133 Milan , Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Richard","family":"Lewis","sequence":"additional","affiliation":[{"name":"Department of Neurology, Cedars-Sinai Medical Center , Los Angeles, CA 90048 , USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sabrina W","family":"Yum","sequence":"additional","affiliation":[{"name":"Department of Neurology, The Perelman School of Medicine at the University of Pennsylvania , Philadelphia, PA 19104 , USA"},{"name":"Division of Neurology, Children\u2019s Hospital of Philadelphia , Philadelphia, PA 19104 , USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6581-9728","authenticated-orcid":false,"given":"Brett A","family":"McCray","sequence":"additional","affiliation":[{"name":"Department of Neurology, The Johns Hopkins University School of Medicine , Baltimore, MD 21287 , USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sindhu","family":"Ramchandren","sequence":"additional","affiliation":[{"name":"Clinical Development Department - Neuroscience, The Janssen Pharmaceutical Companies of Johnson & Johnson , Titusville, NJ 08560 , USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joshua","family":"Burns","sequence":"additional","affiliation":[{"name":"Faculty of Medicine and Health; Paediatric Gait Analysis Service of New South Wales, University of Sydney School of Health Sciences, Sydney Children\u2019s Hospitals Network , Sydney 2031 , Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jun","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Neurology, Houston Methodist Hospital , Houston, TX 77030 , USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9351-7054","authenticated-orcid":false,"given":"Richard S","family":"Finkel","sequence":"additional","affiliation":[{"name":"Center for Experimental Neurotherapeutics, St. Jude Children\u2019s Research Hospital , Memphis, TN 38105 , USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Steven S","family":"Scherer","sequence":"additional","affiliation":[{"name":"Department of Neurology, The Perelman School of Medicine at the University of Pennsylvania , Philadelphia, PA 19104 , USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5669-7415","authenticated-orcid":false,"given":"Stephan","family":"Zuchner","sequence":"additional","affiliation":[{"name":"Dr. John T. Macdonald Foundation Department of Human Genetics and John P. 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