Protective effect of erythropoietin on myocardial apoptosis in rats exposed to carbon monoxide

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• 作者：Mitra Asgharian Rezaee^a ; ^b ; Amir Hooshang Mohammadpour^a ; ^c ; Mohsen Imenshahidi^a ; Mahmoud Mahmoudi^d ; Mojtaba Sankian^e ; Konstantinos Tsarouhas^f ; Andreas Tsakalof^g ; Aristidis Micheal Tsatsakis^g ; Seyed Adel Moallem^a ; ^c ; ^h ; ^{moallem@mums.ac.ir" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Carbon monoxide ; Erythropoietin ; Myocardial apoptosis ; Bcl2
• 刊名：Life Sciences
• 出版年：2016
• 出版时间：1 March 2016
• 年：2016
• 卷：148
• 期：Complete
• 页码：118-124
• 全文大小：550 K

文摘

Cardiac complications are common in carbon monoxide (CO) poisoning and associated with high morbidity and mortality. We have previously shown that erythropoietin (EPO) could reduce CO-induced cardiac ischemia in rat. In the current study, the anti-apoptotic effect of EPO during CO cardiotoxicity was investigated in order to elucidate the mechanism of EPO anti-ischemic action.

Main methods

Wistar rats were exposed to CO (250, 1000 and 3000 ppm). EPO (5000 IU/kg) was administered to all groups by intraperitoneal injection at the end of CO exposure period. TUNEL and caspase-3 activity levels were assessed to investigate the effects of CO exposure and subsequent EPO administration on myocardial apoptosis. The changes of mitochondrial membrane potential (MMP) were also assessed with sensitive lipophilic dye JC-1 by flow cytometry. The roles of Bcl2 and Bax in EPO protective effect were investigated by Western blotting.

Key findings

Myocardial apoptosis was observed following CO exposure. Moreover, mitochondrial membrane depolarization and significant reduction in Bcl2/Bax ratio were shown following CO poisoning especially at 3000 ppm. On the other hand, EPO administration could effectively suppress apoptosis in myocardial cells. Also, EPO significantly prevented the CO-induced depolarization of MMP (p < 0.001) and preserved Bcl2/Bax ratio (p < 0.01).

Significance

EPO reduces myocardial injury due to CO intoxication. Thus EPO could be suggested as a possible candidate for the management of CO cardiotoxicity with clinical applications.