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This study aimed to confirm the protective effect of estrogen on myocardium during myocardial ischemia\/reperfusion (MI\/R) injury and explore the underlying mechanisms.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      Neonatal rat cardiomyocytes and Sprague\u2013Dawley rats were used in this study. Different groups were treated by bilateral ovariectomy, 17\u03b2-estradiol (E2), adenoviral infection, or siRNA transfection. The expression of sarcoplasmic reticulum Ca\n                      <jats:sup>2+<\/jats:sup>\n                      ATPase pump (SERCA2a) and endoplasmic reticulum (ER) stress-related proteins were measured in each group to examine the effect of different E2 levels and determine the relationship between SERCA2a and ER stress. The cell apoptosis, myocardial infarction size, levels of apoptosis and serum cardiac troponin I, ejection fraction, calcium transient, and morphology changes of the myocardium and ER were examined to verify the effects of E2 on the myocardium.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Bilateral ovariectomy resulted in reduced SERCA2a levels and more severe MI\/R injury. E2 treatment increased SERCA2a expression. Both E2 treatment and exogenous SERCA2a overexpression decreased levels of ER stress-related proteins and alleviated myocardial damage. In contrast,\n                      <jats:italic>SERCA2a<\/jats:italic>\n                      knockdown exacerbated ER stress and myocardial damage. Addition of E2 after\n                      <jats:italic>SERCA2a<\/jats:italic>\n                      knockdown did not effectively inhibit ER stress or reduce myocardial injury.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Our data demonstrate that estrogen inhibits ER stress and attenuates MI\/R injury by upregulating SERCA2a. These results provide a new potential target for therapeutic intervention and drug discovery in CHD.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s12964-022-00842-2","type":"journal-article","created":{"date-parts":[[2022,3,25]],"date-time":"2022-03-25T07:36:16Z","timestamp":1648193776000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":36,"title":["Estrogen inhibits endoplasmic reticulum stress and ameliorates myocardial ischemia\/reperfusion injury in rats by upregulating SERCA2a"],"prefix":"10.1186","volume":"20","author":[{"given":"Jingwen","family":"Chen","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yang","family":"Liu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Defeng","family":"Pan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tongda","family":"Xu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuanyuan","family":"Luo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wanling","family":"Wu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pei","family":"Wu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hong","family":"Zhu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4875-0209","authenticated-orcid":false,"given":"Dongye","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2022,3,24]]},"reference":[{"issue":"11","key":"842_CR1","doi-asserted-by":"publisher","first-page":"1391","DOI":"10.1038\/nm.2507","volume":"17","author":"HK Eltzschig","year":"2011","unstructured":"Eltzschig HK, Eckle T. 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