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Levosimendan preconditioning has been shown to attenuate myocardial apoptosis in animal models. However, protective effects of levosimendan postconditioning against myocardial apoptosis following myocardial infarction (MI) have not been evaluated. Therefore, we investigated the effects of levosimendan postconditioning on myocardial apoptosis in MI rat models. Methods. In an anoxia\/reoxygenation (A\/R) model, H9c2 cells were pretreated with or without levosimendan postconditioning after which their apoptosis rates were assessed by flow cytometry, RT-qPCR, and western blot analyses. Then, postconditioning was performed with or without levosimendan in MI rat models. Myocardiocyte apoptosis was evaluated by echocardiography, TTC staining, TUNEL staining, immunohistochemical staining, RT-qPCR, and western blot analysis. Results. Levosimendan postconditioning inhibited H9c2 cell apoptosis in A\/R models by elevating Bcl-2 while suppressing Caspase-3 and Bax at both mRNA and protein levels. Moreover, it improved cardiac functions and reduced the left ventricle infarction area in MI rat models. Compared to the MI control group, cardiomyocyte apoptosis rates in the levosimendan postconditioning group were low. The reduced cardiomyocyte apoptosis rates were associated with downregulation of Bax and Caspase-3 as well as with upregulation of Bcl-2 at mRNA and protein levels. Conclusions. Levosimendan postconditioning of MI rat models protected against cardiomyocyte apoptosis, implying that it is a potential strategy for preventing cardiomyocyte apoptosis in the treatment of cardiac dysfunction following MI.<\/jats:p>","DOI":"10.1155\/2022\/2988756","type":"journal-article","created":{"date-parts":[[2022,1,29]],"date-time":"2022-01-29T13:35:08Z","timestamp":1643463308000},"page":"1-9","source":"Crossref","is-referenced-by-count":2,"title":["Levosimendan Postconditioning Attenuates Cardiomyocyte Apoptosis after Myocardial Infarction"],"prefix":"10.1155","volume":"2022","author":[{"given":"Ying","family":"Xie","sequence":"first","affiliation":[{"name":"Department of Cardiovascular Surgery, Yan\u2019an Hospital Affiliated to Kunming Medical University, No. 245,Renmin East Road, Kunming, Yunnan Province 650051, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhengjiang","family":"Xing","sequence":"additional","affiliation":[{"name":"Department of 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