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BioMed Research International
Volume 2018, Article ID 4565630, 9 pages
https://doi.org/10.1155/2018/4565630
Research Article

Remote Ischemic Postconditioning Protects against Myocardial Ischemia-Reperfusion Injury by Inhibition of the RAGE-HMGB1 Pathway

1Department of Gerontology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
2Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
3Department of Cardiology, Jiangsu Shengze Hospital, Suzhou, China

Correspondence should be addressed to Zhijian Yang; nc.ude.umjn@jngnaynaijihz and Yan Guo; moc.liamtoh@15nayoug

Received 12 June 2017; Revised 23 November 2017; Accepted 24 December 2017; Published 23 January 2018

Academic Editor: Yukio Hayashi

Copyright © 2018 Xiangming Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. The aim of the present study was to observe the effect of RAGE-HMGB1 signal pathway on remote ischemic postconditioning in mice with myocardial ischemia reperfusion injury. Methods. Mice model of MIRI was established and randomly divided into three groups: control group, ischemia reperfusion group, and remote ischemic postconditioning group. Infarction size was detected by Evans blue and TTC staining. Cardiac function was detected by echocardiography measurement. The protein levels of RAGE, HMGB1, P-AKT, and ERK1/2 were detected by Western blot 120 min following reperfusion. Results. RIPostC could decrease the infarct size and increase LVEF and FS compared with I/R group. Two hours after myocardial ischemia reperfusion, the levels of RAGE and HMGB1 were significantly decreased in RIPostC group compared with those in I/R group. The level of p-AKT was significantly higher in the RIPostC group than in the I/R group. LY294002 significantly attenuated RIPostC-increased levels of Akt phosphorylation. Conclusion. RIPostC may inhibit the expression of RAGE and HMGB1 and activate PI3K/Akt signaling pathway to extenuate ischemic reperfusion injury in mice. It could further suppress the oxidative stress, have antiapoptosis effect, and reduce inflammatory reaction, but this effect has certain timeliness.