{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,10]],"date-time":"2026-09-10T11:03:35Z","timestamp":1789038215924,"version":"build-2803163510"},"reference-count":67,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2025,12,17]],"date-time":"2025-12-17T00:00:00Z","timestamp":1765929600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100016944","name":"Regenerative Medicine Minnesota","doi-asserted-by":"crossref","award":["RMM 091620DS008"],"award-info":[{"award-number":["RMM 091620DS008"]}],"id":[{"id":"10.13039\/100016944","id-type":"DOI","asserted-by":"crossref"}]},{"name":"Department of Rehabilitation Medicine, University of Minnesota, USA"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCDD"],"abstract":"<jats:p>Hypertrophic cardiomyopathy (HCM) is a common and deadly cardiac disease characterized by enlarged myocytes, increased myocardial wall thickening, and fibrosis. A majority of HCM cases are associated with mutations in the \u03b2-myosin heavy chain (MYH7) converter domain locus, which leads to varied pathophysiological and clinical manifestations. Using base-editing technology, we generated mutant human-induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) harboring HCM-causing myosin converter domain mutations (MYH7 c.2167C&gt;T [R723C]; MYH6 c.2173C&gt;T [R725C]) to define HCM pathogenesis in vitro. In this study, we integrated transcriptomic analysis with phenotypic and molecular analyses to dissect the HCM disease mechanisms using MYH6\/7 myosin mutants. Our KEGG analysis of bulk RNA-sequencing data revealed significant upregulation of transcripts associated with HCM in the mutant hiPSC-CMs. Further, in-depth transcriptomic analysis using Gene-Ontology (GO-term) analysis for biological process showed upregulation of several transcripts associated with heart development and disease. Notably, our analysis showed robust upregulation of cytoskeletal transcripts, including actin-cytoskeleton networks, sarcomere components, and other structural proteins in the mutant CMs. Furthermore, cellular and nuclear morphological analysis showed that the MYH6\/7 mutation induced cellular hypertrophy and increased aspect ratio compared to the isogenic control. Immunostaining experiments showed marked sarcomere disorganization with lower sarcomeric order and higher dispersion in the mutant hiPSC-CMs, highlighting the remodeling of the myofibril arrangement. Notably, the MYH6\/7 mutant showed reduced cortical F-actin expression and increased central F-actin expression compared to the isogenic control, confirming the cytoskeletal remodeling and sarcomeric organization during HCM pathogenesis. These pathological changes accumulated progressively over time, underscoring the chronic and evolving nature of HCM driven by the MYH6\/7 mutations. Together, our findings provide critical insights into the cellular and molecular underpinnings of MYH6\/7-mutation-associated disease. These findings offer valuable insights into HCM pathogenesis, aiding in future therapies.<\/jats:p>","DOI":"10.3390\/jcdd12120500","type":"journal-article","created":{"date-parts":[[2025,12,17]],"date-time":"2025-12-17T09:43:46Z","timestamp":1765964626000},"page":"500","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Early Cytoskeletal Remodeling Drives Hypertrophic Cardiomyopathy Pathogenesis in MYH6\/7 Mutant hiPSC-Derived Cardiomyocytes"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0578-2622","authenticated-orcid":false,"given":"Mohammad","family":"Shameem","sequence":"first","affiliation":[{"name":"Department of Rehabilitation Medicine, University of Minnesota, Minneapolis, MN 55455, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hassan","family":"Salih","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Medicine, University of Minnesota, Minneapolis, MN 55455, USA"},{"name":"Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ahmed","family":"Sharara","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Medicine, University of Minnesota, Minneapolis, MN 55455, USA"},{"name":"Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Roshan Nicholas Rochus","family":"John","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Medicine, University of Minnesota, Minneapolis, MN 55455, USA"},{"name":"Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leo","family":"Ogle","sequence":"additional","affiliation":[{"name":"Experimental Surgical Services (ESS), University of Minnesota, Minneapolis, MN 55455, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bhairab N.","family":"Singh","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Medicine, University of Minnesota, Minneapolis, MN 55455, USA"},{"name":"Stem Cell Institute, University of Minnesota, Minneapolis, MN 55455, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,12,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1249","DOI":"10.1016\/j.jacc.2015.01.019","article-title":"New perspectives on the prevalence of hypertrophic cardiomyopathy","volume":"65","author":"Semsarian","year":"2015","journal-title":"J. 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