N-Acetylcysteine Attenuates Diabetic Myocardial Ischemia Reperfusion Injury through Inhibiting Excessive Autophagy
Joint Authors
Li, Haobo
Wang, Tingting
Zhang, Zhong-jun
Wang, Sheng
Wang, Chunyan
Yan, Fuxia
He, Yi
Xia, Zhengyuan
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-02-06
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Background.
Excessive autophagy is a major mechanism of myocardial ischemia reperfusion injury (I/RI) in diabetes with enhanced oxidative stress.
Antioxidant N-acetylcysteine (NAC) reduces myocardial I/RI.
It is unknown if inhibition of autophagy may represent a mechanism whereby NAC confers cardioprotection in diabetes.
Methods and Results.
Diabetes was induced in Sprague-Dawley rats with streptozotocin and they were treated without or with NAC (1.5 g/kg/day) for four weeks before being subjected to 30-minute coronary occlusion and 2-hour reperfusion.
The results showed that cardiac levels of 15-F2t-Isoprostane were increased and that autophagy was evidenced as increases in ratio of LC3 II/I and protein P62 and AMPK and mTOR expressions were significantly increased in diabetic compared to nondiabetic rats, concomitant with increased postischemic myocardial infarct size and CK-MB release but decreased Akt and eNOS activation.
Diabetes was also associated with increased postischemic apoptotic cell death manifested as increases in TUNEL positive cells, cleaved-caspase-3, and ratio of Bax/Bcl-2 protein expression.
NAC significantly attenuated I/RI-induced increases in oxidative stress and cardiac apoptosis, prevented postischemic autophagy formation in diabetes, and reduced postischemic myocardial infarction (all p<0.05).
Conclusions.
NAC confers cardioprotection against diabetic heart I/RI primarily through inhibiting excessive autophagy which might be a major mechanism why diabetic hearts are less tolerant to I/RI.
American Psychological Association (APA)
Wang, Sheng& Wang, Chunyan& Yan, Fuxia& Wang, Tingting& He, Yi& Li, Haobo…[et al.]. 2017. N-Acetylcysteine Attenuates Diabetic Myocardial Ischemia Reperfusion Injury through Inhibiting Excessive Autophagy. Mediators of Inflammation،Vol. 2017, no. 2017, pp.1-10.
https://search.emarefa.net/detail/BIM-1188813
Modern Language Association (MLA)
Wang, Sheng…[et al.]. N-Acetylcysteine Attenuates Diabetic Myocardial Ischemia Reperfusion Injury through Inhibiting Excessive Autophagy. Mediators of Inflammation No. 2017 (2017), pp.1-10.
https://search.emarefa.net/detail/BIM-1188813
American Medical Association (AMA)
Wang, Sheng& Wang, Chunyan& Yan, Fuxia& Wang, Tingting& He, Yi& Li, Haobo…[et al.]. N-Acetylcysteine Attenuates Diabetic Myocardial Ischemia Reperfusion Injury through Inhibiting Excessive Autophagy. Mediators of Inflammation. 2017. Vol. 2017, no. 2017, pp.1-10.
https://search.emarefa.net/detail/BIM-1188813
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1188813