Title:Kukoamine A Activates Akt/GSK-3β Pathway to Repress Oxidative Stress and Inflammation to Alleviate Myocardial Ischemia-reperfusion Injury
Volume: 21
Issue: 12
Author(s): Jianmao Hong, Yanqiong Ye, Dingwen Zheng and Ximing Qian*
Affiliation:
- Department of Cardiac Surgery, Sir Run Run Shaw Hospital, Hangzhou, Zhejiang, 310016, China
Keywords:
Kukoamine A, Akt/GSK-3β pathway, myocardial ischemia-reperfusion injury, myocardial infarction, cardiomyocytes, superoxide dismutase.
Abstract:
Background: Myocardial ischemia-reperfusion injury (MI/RI) is a serious complication
after revascularization of myocardial infarction, which causes myocardium damage. Kukoamine A
(KuA) can repress oxidative stress and neuronal apoptosis in cerebral ischemia animal models.
Objective: In the present study, our objective was to explore the role of KuA in MI/RI and the underlying
mechanism of KuA in oxidative stress and inflammation of MI/RI.
Methods: H9c2 cells’ cytotoxicity was detected using the lactate dehydrogenase (LDH) assay kit.
ROS level was measured by immunofluorescence. Male C57BL/6 mice were used to establish MI/RI
mice by ligating the left anterior descending coronary artery (LAD).
Results: KuA treatment decreased the apoptosis and the cytotoxicity, increased the viability, and
reduced the activities of myocardial infarction markers (CKMB, MYO, and cTnI) in hypoxia/
reoxygenation (H/R)-induced H9c2 cells. KuA reduced the levels of ROS, MDA, and inflammatory
factors (IL-6, IL-1β, and TNF-α), and facilitated MMP and SOD levels in H/R-induced H9c2
cells. Besides, KuA activated Akt/GSK-3β axis, which was repressed by PI3K inhibitor LY294002.
Moreover, KuA improved survival times, decreased the infarct size of mice, and recovered cardiac
function in MI/RI mice. Finally, KuA alleviated MI/RI through Akt/GSK-3β pathway in vivo.
Conclusion: Thus, KuA exerts a protective function in MI/RI through the Akt/GSK-3β axis to repress
oxidative stress and inflammation.