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However, the mechanism behind PH development in HFpEF is poorly understood. We aimed to identify transcriptomic associations with PH development in HFpEF. Blood was collected from 30 HFpEF patients: 10 without PH, 10 with isolated post-capillary PH, and 10 with CpcPH. Gene expression measurements were completed using transcriptome-wide RNA sequencing. Gene expression differences were compared using a quasi-likelihood method adjusting for age, sex, race, and smoking-status. Biological pathways were compared using global gene expression differences. A replication in 34 additional heart failure patients and a validation in lung tissue from a representative mouse model were completed using quantitative PCR. Six differentially expressed genes were identified when comparing transcriptomics between subjects with CpcPH and those without PH. When tested in additional subjects, only the association with <jats:italic>ID2<\/jats:italic> replicated. Consistent with clinical findings, <jats:italic>Id2<\/jats:italic> expression was also upregulated in mice with HFpEF and PH. Pathway analysis identified proliferative and mitochondrial pathways associated with CpcPH. Thus, these patients may possess systemic pathophysiological differences similar to those observed in pulmonary arterial hypertension patients.<\/jats:p>","DOI":"10.1038\/s41598-019-55700-y","type":"journal-article","created":{"date-parts":[[2019,12,20]],"date-time":"2019-12-20T11:03:50Z","timestamp":1576839830000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Transcriptome-wide analysis associates ID2 expression with combined pre- and post-capillary pulmonary hypertension"],"prefix":"10.1038","volume":"9","author":[{"given":"Meghan J.","family":"Arwood","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nasim","family":"Vahabi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christelle","family":"Lteif","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ravindra K.","family":"Sharma","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Roberto F.","family":"Machado","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Julio D.","family":"Duarte","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2019,12,20]]},"reference":[{"key":"55700_CR1","doi-asserted-by":"publisher","first-page":"447","DOI":"10.1016\/j.hfc.2012.04.009","volume":"8","author":"CF Barnett","year":"2012","unstructured":"Barnett, C. 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