{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,12]],"date-time":"2026-11-12T04:31:37Z","timestamp":1794457897332,"version":"4.9.1"},"reference-count":36,"publisher":"American Medical Association (AMA)","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JAMA Cardiol"],"published-print":{"date-parts":[[2026,2,1]]},"abstract":"<jats:sec id=\"ab-hoi250073-4\">\n                    <jats:title>Importance<\/jats:title>\n                    <jats:p>Polygenic background modifies variant penetrance in hypertrophic (HCM) and dilated (DCM) cardiomyopathies, diseases with opposing morphologic characteristics and inversely related genetic pathways. Whether polygenic susceptibility for one disease protects against monogenic risk for the other remains uncertain.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"ab-hoi250073-5\">\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To characterize if polygenic background bidirectionally modifies pathogenicity of established rare variants associated with HCM and DCM.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"ab-hoi250073-6\">\n                    <jats:title>Design, Setting, and Participants<\/jats:title>\n                    <jats:p>This cross-sectional study was conducted using data from the Penn Medicine BioBank (PMBB). Volunteers enrolled in PMBB between November 1994 and July 2022 with available electronic health record and genotyping data through September 2024 were included. Analysis was performed in June 2025.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"ab-hoi250073-7\">\n                    <jats:title>Exposures<\/jats:title>\n                    <jats:p>Normalized polygenic scores (PGSs) for HCM and DCM as well as carrier status of pathogenic variants in established HCM or DCM genes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"ab-hoi250073-8\">\n                    <jats:title>Main Outcomes and Measures<\/jats:title>\n                    <jats:p>HCM and DCM defined using electronic health record diagnosis and procedure codes, as well as echocardiogram measurements obtained from medical records.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"ab-hoi250073-9\">\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      This study included 49\u202f434 PMBB participants (median (IQR) age, 57 [42-67] years; 24\u202f886 male [50.3%]). An increased HCM PGS was associated with a 1.1% increase in left ventricular ejection fraction (LVEF; 95% CI, 0.9 to 1.3;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u20097.3\u2009\u00d7\u200910\n                      <jats:sup>\u221231<\/jats:sup>\n                      ), a 0.79-mm decrease in left ventricular internal diameter at end-diastole (LVIDd; 95% CI, \u22120.92 to \u22120.67;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u20092.3\u2009\u00d7\u200910\n                      <jats:sup>\u221236<\/jats:sup>\n                      ), and a 0.18-mm increase in interventricular septal (IVS) thickness (95% CI, 0.14 to 0.22;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u20099.3\u2009\u00d7\u200910\n                      <jats:sup>\u221219<\/jats:sup>\n                      ). A 1-SD increase in DCM PGS was associated with a 2.0% decrease in LVEF (95% CI, \u22122.2 to \u22121.8;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u20093.3\u2009\u00d7\u200910\n                      <jats:sup>\u221283<\/jats:sup>\n                      ) and a 1.0-mm increase in LVIDd (95% CI, 0.93 to 1.1;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u20093.2\u2009\u00d7\u200910\n                      <jats:sup>\u221278<\/jats:sup>\n                      ) and was not significantly associated with IVS (estimate, \u22121.3\u2009\u00d7\u200910\u207b\n                      <jats:sup>3<\/jats:sup>\n                      mm; 95% CI, \u22120.04 to 0.03;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u2009.94). A 1-SD increase in HCM PGS was associated with an increased risk of HCM (odds ratio [OR], 1.8; 95% CI, 1.6-2.0;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u20099.6\u2009\u00d7\u200910\n                      <jats:sup>\u221225<\/jats:sup>\n                      ) and decreased risk of DCM (OR, 0.69; 95% CI, 0.64-0.74;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u20094.3\u2009\u00d7\u200910\n                      <jats:sup>\u221222<\/jats:sup>\n                      ). A 1-SD increase in DCM PGS was associated with an increased risk of DCM (OR, 1.6; 95% CI, 1.5-1.7;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u20091.7\u2009\u00d7\u200910\n                      <jats:sup>\u221240<\/jats:sup>\n                      ) and decreased risk of HCM (OR, 0.69; 95% CI, 0.63-0.76;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u20093.0\u2009\u00d7\u200910\n                      <jats:sup>\u221213<\/jats:sup>\n                      ). Monogenic and polygenic risk terms had significant independent effects when combined in models of disease status and echocardiographic measurements; the inclusion of either an HCM or DCM PGS improved the discrimination (area under the receiving operating characteristic curve) of models of HCM (0.043; 95% credible interval, 0.034-0.053) and DCM (0.045; 95% credible interval, 0.039-0.051) beyond models including age, sex, and monogenic variant status.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"ab-hoi250073-10\">\n                    <jats:title>Conclusions and Relevance<\/jats:title>\n                    <jats:p>The findings in this study indicate that HCM and DCM risk were modified by polygenic background, which exists on an overlapping but opposing spectrum. Consideration of polygenic background may offer clinical value through improving understanding and prediction of these inherited cardiomyopathies.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1001\/jamacardio.2025.4739","type":"journal-article","created":{"date-parts":[[2025,12,23]],"date-time":"2025-12-23T16:00:32Z","timestamp":1766505632000},"page":"147","source":"Crossref","is-referenced-by-count":8,"title":["Polygenic Background and Penetrance of Pathogenic Variants in Hypertrophic and Dilated Cardiomyopathies"],"prefix":"10.1001","volume":"11","author":[{"given":"Sarah A.","family":"Abramowitz","sequence":"first","affiliation":[{"name":"Department of Surgery, University of Pennsylvania Perelman School of Medicine, University of Pennsylvania, Philadelphia"},{"name":"Donald and Barbara Zucker School of Medicine at Hofstra\/Northwell, Hempstead, New York"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lily","family":"Hoffman-Andrews","sequence":"additional","affiliation":[{"name":"Center for Inherited Cardiovascular Disease, Division of Cardiology, Hospital of the University of Pennsylvania, Philadelphia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David","family":"Zhang","sequence":"additional","affiliation":[{"name":"Cardiovascular Institute, University of Pennsylvania Perelman School of Medicine, University of Pennsylvania, Philadelphia"},{"name":"Department of Genetics, University of Pennsylvania Perelman School of Medicine, University of Pennsylvania, Philadelphia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Renae","family":"Judy","sequence":"additional","affiliation":[{"name":"Department of Surgery, University of Pennsylvania Perelman School of Medicine, University of Pennsylvania, Philadelphia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas P.","family":"Cappola","sequence":"additional","affiliation":[{"name":"Cardiovascular Institute, University of Pennsylvania Perelman School of Medicine, University of Pennsylvania, Philadelphia"},{"name":"Division of Cardiovascular Medicine, University of Pennsylvania Perelman School of Medicine, University of Pennsylvania, Philadelphia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sharlene M.","family":"Day","sequence":"additional","affiliation":[{"name":"Center for Inherited Cardiovascular Disease, Division of Cardiology, Hospital of the University of Pennsylvania, Philadelphia"},{"name":"Cardiovascular Institute, University of Pennsylvania Perelman School of Medicine, University of Pennsylvania, Philadelphia"},{"name":"Division of Cardiovascular Medicine, University of Pennsylvania Perelman School of Medicine, University of Pennsylvania, Philadelphia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nosheen","family":"Reza","sequence":"additional","affiliation":[{"name":"Center for Inherited Cardiovascular Disease, Division of Cardiology, Hospital of the University of Pennsylvania, Philadelphia"},{"name":"Division of Cardiovascular Medicine, University of Pennsylvania Perelman School of Medicine, University of Pennsylvania, Philadelphia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anjali T.","family":"Owens","sequence":"additional","affiliation":[{"name":"Center for Inherited Cardiovascular Disease, Division of Cardiology, Hospital of the University of Pennsylvania, Philadelphia"},{"name":"Division of Cardiovascular Medicine, University of Pennsylvania Perelman School of Medicine, University of Pennsylvania, Philadelphia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Scott M.","family":"Damrauer","sequence":"additional","affiliation":[{"name":"Department of Surgery, University of Pennsylvania Perelman School of Medicine, University of Pennsylvania, Philadelphia"},{"name":"Cardiovascular Institute, University of Pennsylvania Perelman School of Medicine, University of Pennsylvania, Philadelphia"},{"name":"Department of Genetics, University of Pennsylvania Perelman School of Medicine, University of Pennsylvania, Philadelphia"},{"name":"Corporal Michael J. 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