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COPD involves abnormalities of the airways and, in emphysema, parenchymal pulmonary destruction. Cardiovascular disease has emerged as a significant comorbidity to COPD. Heart failure with preserved ejection fraction (HFpEF) appears to be particularly associated with COPD-emphysema. Traditional treatments have shown limited efficacy in improving COPD-associated HFpEF. This lack of therapeutic efficacy highlights the need to identify potential mechanisms that link COPD-emphysema to HFpEF. Therefore, we aimed to study the delayed cardiac physiological impacts in a rat model with acute exacerbated emphysema. Emphysema was induced by four weekly 4 units elastase (ELA) intratracheal pulmonary instillations and exacerbation by one final additional lipolysaccharide (LPS) instillation in male Wistar rats. At 5\u2009weeks after the ELA and LPS exposure, in vivo and ex vivo pulmonary and cardiac measurements were performed. Experimental exacerbated emphysema resulted in decreased pulmonary function and exercise intolerance. Histological analysis revealed parenchymal pulmonary destruction without signs of inflammation or cardiac fibrosis. In vivo cardiac functional analysis revealed diastolic dysfunction and tachycardia. Ex vivo analysis revealed a cellular cardiomyopathy with decreased myofilament Ca2+ sensitivity, cross-bridge cycling kinetics, and increased adrenergic PKA (protein kinase A)-dependent phosphorylation of troponin-I. Experimental exacerbated emphysema was associated with exercise intolerance that appeared to be secondary to increased \u03b2-adrenergic tone and subsequent cardiac myofilament dysfunction. A \u03b21-receptor antagonist treatment (bisoprolol) started 24\u2009hours after ELA-LPS instillation prevented in vivo and ex vivo diastolic dysfunction. These results suggest that novel treatment strategies targeted to the cardiac myofilament may be beneficial to combat exacerbated emphysema\u2013associated HFpEF.<\/jats:p>","DOI":"10.1165\/rcmb.2022-0382oc","type":"journal-article","created":{"date-parts":[[2023,5,10]],"date-time":"2023-05-10T17:39:02Z","timestamp":1683740342000},"page":"230-241","update-policy":"https:\/\/doi.org\/10.1164\/crossmarkpolicies","source":"Crossref","is-referenced-by-count":9,"title":["Diastolic Cardiomyopathy Secondary to Experimentally Induced Exacerbated Emphysema"],"prefix":"10.1093","volume":"69","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5695-5020","authenticated-orcid":false,"given":"Pierre-Edouard","family":"Grillet","sequence":"first","affiliation":[{"name":"PhyMedExp, INSERM, CNRS"},{"name":"Department of biochemistry and hormonology, Montpellier University, CHU Montpellier, Montpellier, 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