{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T13:42:08Z","timestamp":1792590128350,"version":"4.5.0"},"reference-count":35,"publisher":"Portland Press Ltd.","issue":"1","license":[{"start":{"date-parts":[[2024,12,4]],"date-time":"2024-12-04T00:00:00Z","timestamp":1733270400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100010564","name":"Deutsches Zentrum f\u00fcr Lungenforschung","doi-asserted-by":"publisher","award":["82DZL004B2"],"award-info":[{"award-number":["82DZL004B2"]}],"id":[{"id":"10.13039\/501100010564","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100002347","name":"Bundesministerium f\u00fcr Bildung und Forschung","doi-asserted-by":"publisher","award":["01EO1003  and 01EO1503"],"award-info":[{"award-number":["01EO1003  and 01EO1503"]}],"id":[{"id":"10.13039\/501100002347","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["portlandpress.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2025,1,15]]},"abstract":"<jats:p>Genetic diagnostic testing of 325 pulmonary arterial hypertension (PAH) patients using a PAH specific gene panel including 18 known PAH genes revealed mutations in 23%. Further PAH candidate genes were sequenced in the remaining patients exposing two SMAD5 variants, which were clinically and functionally characterized. We first recorded familial cosegregation and clinical parameters. Functional tests were performed following transient over-expression of the two SMAD5 variants in pulmonary artery smooth muscle cells (PASMCs). Expression of these variants was confirmed by quantitative PCR, Sanger sequencing, and Western blotting. Cell viability was evaluated using cell counting kit 8, cell proliferation by bromodeoxyuridine (BrdU), and apoptosis by annexin V assay. Both SMAD5 missense variants were absent in healthy controls and predicted to be pathogenic. The variant c.1175T&amp;gt;C p.(Leu392Pro) was identified in a heritable PAH patient and her healthy son. The mother had died of suspected PAH at age 42. The expression of this variant in PASMCs led to significantly higher cell viability due to higher proliferation in comparison with SMAD5 wild-type cells. The second variant c.277T&amp;gt;A p.(Trp93Arg) was identified in a patient with congenital heart disease associated PAH with a surgically repaired ventricular septal defect. Its expression led to significantly lower cell viability due to increased apoptosis in comparison with wild-type SMAD5 cells. Taking into account familial aggregation, clinical findings, and functional evidence, both variants could be classified as likely pathogenic. This is the first description of SMAD5 as a potential novel PAH gene for genetic diagnostic testing.<\/jats:p>","DOI":"10.1042\/cs20241340","type":"journal-article","created":{"date-parts":[[2024,12,4]],"date-time":"2024-12-04T21:37:48Z","timestamp":1733348268000},"page":"15-27","update-policy":"https:\/\/doi.org\/10.1042\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["<i>SMAD5<\/i> as a novel gene for familial pulmonary arterial hypertension"],"prefix":"10.1042","volume":"139","author":[{"given":"Ding","family":"Cao","sequence":"first","affiliation":[{"name":"1Center for Pulmonary Hypertension, Thoraxklinik Heidelberg gGmbH at Heidelberg University Hospital, Translational Lung Research Center Heidelberg (TLRC), German Center for Lung Research (DZL), Heidelberg, Germany"},{"name":"2Institute of Human Genetics, Heidelberg University, Heidelberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7318-3918","authenticated-orcid":false,"given":"Ekkehard","family":"Gr\u00fcnig","sequence":"additional","affiliation":[{"name":"1Center for Pulmonary Hypertension, Thoraxklinik Heidelberg gGmbH at Heidelberg University Hospital, Translational Lung Research Center Heidelberg (TLRC), German Center for Lung Research (DZL), Heidelberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4091-4910","authenticated-orcid":false,"given":"Yuriy","family":"Sirenko","sequence":"additional","affiliation":[{"name":"3Pulmonary Hypertension Center, SI NSC named after M.D. Starzhesko of NAMS of Ukraine, Kyiv, Ukraine"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3651-3014","authenticated-orcid":false,"given":"Ganna","family":"Radchenko","sequence":"additional","affiliation":[{"name":"3Pulmonary Hypertension Center, SI NSC named after M.D. Starzhesko of NAMS of Ukraine, Kyiv, Ukraine"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7016-7373","authenticated-orcid":false,"given":"Henning","family":"Gall","sequence":"additional","affiliation":[{"name":"4Department of Pneumology, Medical and Policlinic II, University Hospital of Giessen and Marburg, Universities of Giessen and Marburg Lung Center (UGMLC), German Center for Lung Research (DZL), Giessen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ayat","family":"Ahmed","sequence":"additional","affiliation":[{"name":"2Institute of Human Genetics, Heidelberg University, Heidelberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Susanne","family":"Thei\u00df","sequence":"additional","affiliation":[{"name":"2Institute of Human Genetics, Heidelberg University, Heidelberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5211-7997","authenticated-orcid":false,"given":"Mareike","family":"Lankeit","sequence":"additional","affiliation":[{"name":"5Center for Thrombosis and Hemostasis, University Medical Center Mainz, Mainz, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0741-2633","authenticated-orcid":false,"given":"Benjamin","family":"Meder","sequence":"additional","affiliation":[{"name":"6Department of Internal Medicine III, Precision Digital Health, University of Heidelberg and Informatics for Life and German Center for Cardiovascular Research (DZHK), Heidelberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Magdalena","family":"Laugsch","sequence":"additional","affiliation":[{"name":"2Institute of Human Genetics, Heidelberg University, Heidelberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7288-8297","authenticated-orcid":false,"given":"Christina A.","family":"Eichstaedt","sequence":"additional","affiliation":[{"name":"1Center for Pulmonary Hypertension, Thoraxklinik Heidelberg gGmbH at Heidelberg University Hospital, Translational Lung Research Center Heidelberg (TLRC), German Center for Lung Research (DZL), Heidelberg, Germany"},{"name":"2Institute of Human Genetics, Heidelberg University, Heidelberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"288","published-online":{"date-parts":[[2025,1,15]]},"reference":[{"key":"2025032116471222000_CS-2024-1340C1","article-title":"Right Heart Size and Right Ventricular Reserve in Pulmonary Hypertension: Impact on Management and Prognosis","volume":"10","author":"Gr\u00fcnig","year":"2020","journal-title":"Diagn. 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