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Mediators of Inflammation
Volume 2014 (2014), Article ID 451826, 7 pages
http://dx.doi.org/10.1155/2014/451826
Research Article

Protective Effects of Pretreatment with Oleanolic Acid in Rats in the Acute Phase of Hepatic Ischemia-Reperfusion Injury: Role of the PI3K/Akt Pathway

1Department of Anesthesiology, 1st Affiliated Hospital, Nanjing Medical University, Nanjing, China
2Key laboratory of Anesthesiology, Xuzhou, Jiangsu, China
3Department of Anesthesiology, 2rd Affiliated Hospital, Nanchang University, Nanchang, China
4Department of Emergency, 1st Affiliated Hospital, Nanjing Medical University, Nanjing, China
5Department of Anesthesiology, Jiangsu Tumor Hospital, Nanjing, China
6Center for Drug Discovery, College of Pharmacy, China Pharmaceutical University, Nanjing, China

Received 6 February 2014; Revised 26 March 2014; Accepted 31 March 2014; Published 16 April 2014

Academic Editor: KyungHyun Kim

Copyright © 2014 Bo Gui 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

Oleanolic acid (OA) has been used to treat liver disorders, but whether it can attenuate hepatic ischemia-reperfusion- (IR-) associated liver dysfunction remains unexplored. In the present study, 160 male Sprague-Dawley rats were equally divided into five groups: group SH received neither hepatic IR nor drugs; group IR received hepatic IR without drugs; group CM and group OA received 0.5% sodium carboxymethylcellulose and 100 mg/kg OA, intragastrically, once a day for seven days before the hepatic IR, respectively; on the basis of treatment in group OA, group OA+wortmannin further received 15 g/kg of PI3K inhibitor wortmannin, intraperitoneally, 30 min before the hepatic IR. Then each group was equally divided into four subgroups according to four time points (preoperation, 0 h, 3 h, and 6 h after reperfusion). Serum ALT activity, IL-1 concentration, and hepatic phosphorylation of PI3K, Akt, and GSK-3 protein expression were serially studied. We found that OA pretreatment improved histological status and decreased serum ALT and IL-1 levels. It also increased p-PI3K, p-Akt, and p-GSK-3 protein expression at all the four time points. Prophylactic wortmannin partially reversed OA’s protective effects. The data indicate that OA pretreatment protects liver from IR injury during the acute phase partially through PI3K/Akt-mediated inactivation of GSK-3.