Qian Yu1, Xin Li2, Xia Cao3. 1. Department of Pharmacy, Jilin University, Changchun, China; Department of Pharmacy, China-Japan Union Hospital, Jilin University, Changchun, China. 2. Department of Pharmacy, China-Japan Union Hospital, Jilin University, Changchun, China. 3. Department of Pharmacy, Jilin University, Changchun, China. Electronic address: caoxia8478@163.com.
Abstract
BACKGROUND: The aim of the study was to examine and confirm the cardioprotective effect and mechanism of phenylethanoid glycoside-rich extract of Cistanche deserticola (PhG-RE), a well-known natural antioxidant-based active constituents, against ischemia/reperfusion injury using both in vivo and in vitro approaches. METHODS: A total of 30 Sprague-Dawley rats were divided in to 3 groups as group 1: sham laparotomy, group 2: IR, and group 3: IR + PhG-RE group (0.25 mg/mL/min). Hearts were subjected to 30 min of global ischemia followed by 45 min of reperfusion. The myocardial infarct size and the activities of creatine kinase isoenzyme (CK-MB) and lactate dehydrogenase (LDH) were measured. Myocardial tissue malondialdehyde (MDA), glutathione peroxidase (GSH-Px), and superoxide dismutase (SOD) levels were detected. Western blot analysis was carried out to determine the cardioprotective mechanisms of PhG-RE. RESULTS: Hearts treated with PhG-RE showed a significant reduction in infarct size and decrease in CK-MB and LDH activities. PhG-RE also reduced MDA levels and elevated the activities of GSH-Px, SOD. The expressions of cytochrome-c were significantly reduced in the treated group. A significant upregulation of antiapoptotic proteins Bcl-2/Bax with simultaneous downregulation of cleaved-caspase-3 was observed. The molecular signaling cascade, including phospho-Akt (ser-473) and phospho-GSK3β that lead to the activation or suppression of apoptotic pathway, also showed a significant protective role in the treatment group. CONCLUSIONS: The results suggested that the PhG-RE may reduce the oxidative stress in the reperfused myocardium and play a significant role in the inhibition of apoptotic pathways leading to cardioprotection.
BACKGROUND: The aim of the study was to examine and confirm the cardioprotective effect and mechanism of phenylethanoid glycoside-rich extract of Cistanche deserticola (PhG-RE), a well-known natural antioxidant-based active constituents, against ischemia/reperfusion injury using both in vivo and in vitro approaches. METHODS: A total of 30 Sprague-Dawley rats were divided in to 3 groups as group 1: sham laparotomy, group 2: IR, and group 3: IR + PhG-RE group (0.25 mg/mL/min). Hearts were subjected to 30 min of global ischemia followed by 45 min of reperfusion. The myocardial infarct size and the activities of creatine kinase isoenzyme (CK-MB) and lactate dehydrogenase (LDH) were measured. Myocardial tissue malondialdehyde (MDA), glutathione peroxidase (GSH-Px), and superoxide dismutase (SOD) levels were detected. Western blot analysis was carried out to determine the cardioprotective mechanisms of PhG-RE. RESULTS: Hearts treated with PhG-RE showed a significant reduction in infarct size and decrease in CK-MB and LDH activities. PhG-RE also reduced MDA levels and elevated the activities of GSH-Px, SOD. The expressions of cytochrome-c were significantly reduced in the treated group. A significant upregulation of antiapoptotic proteins Bcl-2/Bax with simultaneous downregulation of cleaved-caspase-3 was observed. The molecular signaling cascade, including phospho-Akt (ser-473) and phospho-GSK3β that lead to the activation or suppression of apoptotic pathway, also showed a significant protective role in the treatment group. CONCLUSIONS: The results suggested that the PhG-RE may reduce the oxidative stress in the reperfused myocardium and play a significant role in the inhibition of apoptotic pathways leading to cardioprotection.
Authors: Qiong-Ling Fan; Jia-Wei Wang; Shi-Lei Zhang; Tao Liu; Jun Zhao; Shu-Ping You Journal: Evid Based Complement Alternat Med Date: 2020-06-09 Impact factor: 2.629