{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T18:51:24Z","timestamp":1788979884714,"version":"build-2803163510"},"reference-count":68,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,1,14]],"date-time":"2026-01-14T00:00:00Z","timestamp":1768348800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Cell. Neurosci."],"abstract":"<jats:p>\n                    Spinocerebellar ataxia type 3 (SCA3) is a neurodegenerative disease caused by polyglutamine repeat expansion in the\n                    <jats:italic>ATXN3<\/jats:italic>\n                    gene. Despite the ubiquitous expression of ATXN3 throughout the body, SCA3 pathology is most pronounced in select, vulnerable central nervous system regions. Notably, spinal cord atrophy that is detectable by MRI emerges prior to ataxia symptom onset and progresses with disease severity. However, the pathogenic molecular signatures of the SCA3 spinal cord remain largely unexplored. Here, we present the first comprehensive analysis of the spinal cord transcriptome in SCA3 using both human and mouse model tissue. Our data reveal both early and progressive transcriptional dysregulation in the spinal cord, impacting key biological processes such as lipid metabolism, inflammation, cellular structure, and nucleic acid processing. Transcriptomic profiling of\n                    <jats:italic>Atxn3<\/jats:italic>\n                    knockout mouse spinal cord revealed only subtle transcriptional changes with little overlap to those in SCA3 knock-in mice, indicating that spinal cord pathology arising from gene expression changes are due to mutant ATXN3 toxic gain-of-function mechanisms, rather than ATXN3 loss-of-function. In addition, we observed aberrant RNA splicing changes in KI mice, particularly in oligodendrocyte signature genes. Collectively, these novel findings position the spinal cord as a primary and early site of SCA3 pathogenesis and underscore its potential both as a sensitive regional biomarker for disease progression and as a key target for therapeutic intervention.\n                  <\/jats:p>","DOI":"10.3389\/fncel.2025.1735225","type":"journal-article","created":{"date-parts":[[2026,1,14]],"date-time":"2026-01-14T05:15:33Z","timestamp":1768367733000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":4,"title":["Early transcriptomic perturbations highlight the spinal cord as a key pathogenic region in spinocerebellar ataxia type 3"],"prefix":"10.3389","volume":"19","author":[{"given":"Jacen","family":"Emerson","sequence":"first","affiliation":[{"name":"Department of Neurology, University of Michigan","place":["Ann Arbor, MI, United States"]},{"name":"Neuroscience Graduate Program, University of Michigan","place":["Ann Arbor, MI, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brianna S.","family":"Nelthrope","sequence":"additional","affiliation":[{"name":"The RNA Institute and Department of Biological Sciences, College of Arts & Sciences, University at Albany-SUNY","place":["Albany, NY, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Emma A.","family":"Walker","sequence":"additional","affiliation":[{"name":"Department of Neurology, University of Michigan","place":["Ann Arbor, MI, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Grace","family":"Mao","sequence":"additional","affiliation":[{"name":"Department of Neurology, University of Michigan","place":["Ann Arbor, MI, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hannah K.","family":"Shorrock","sequence":"additional","affiliation":[{"name":"The RNA Institute and Department of Biological Sciences, College of Arts & Sciences, University at Albany-SUNY","place":["Albany, NY, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hayley S.","family":"McLoughlin","sequence":"additional","affiliation":[{"name":"Department of Neurology, University of Michigan","place":["Ann Arbor, MI, United States"]},{"name":"Department of Human Genetics, University of Michigan","place":["Ann Arbor, MI, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2026,1,14]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","first-page":"239","DOI":"10.1093\/hmg\/ddae174","article-title":"Dysregulation of alternative splicing is a transcriptomic feature of patient-derived fibroblasts from CAG repeat expansion spinocerebellar ataxias","volume":"34","author":"Aliyeva","year":"2025","journal-title":"Hum. 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