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24 June 2018 : Laboratory Research  

Protective Effects the Akt Activator SC79 in Hepatic Ischemia-Reperfusion Injury

Hui Zhou1AE, Ying Yu2E, Jinna Zhang2F, Yunfang Zhang3B, Qi Luan4CF, Gongming Wang1G*

DOI: 10.12659/MSM.911178

Med Sci Monit 2018; 24: LBR4346-4354

Abstract

BACKGROUND: SC79 has been reported to protect against experimental ischemia-elicited neuronal death and brain injury and to protect myocardiocytes from hypoxia/reoxygenation (H/R) injury. Here, we investigated the effects of SC79 in primary hepatocytes in vitro and in rat liver in vivo following hypoxia-reoxygenation (H/R) and hepatic I/R injury.

MATERIAL AND METHODS: The livers of Sprague-Dawley rats were subjected to 45 min of ischemia followed by 2–24 h of reperfusion. The primary hepatocytes were subjected to hypoxia for 6 h and for 2–24 h. The hepatocytes cells or the hepatic I/R injury model livers were treated with SC79 or/and LY294002 at different times and concentrations. The serum ALT, AST, histologic examination, cellular viability, and cell apoptosis were assessed. The levels of phospho-Akt, Bad, Bim, Bax, Bcl-2, and Bcl-XL were determined by Western blot analysis.

RESULTS: SC79 improved viability and inhibited apoptosis in hepatocytes following H/R. SC79 decreased serum AST and ALT, markedly improved pathology, and decreased cell apoptosis in livers following I/R. In addition, SC79 promoted the expression of phospho-Akt, Bcl-2, and Bcl-XL, and decreased the expression of Bid, Bax, and Bim. PI3K inhibitor (LY294002) pre-treatment completely abolished the above-mentioned effects of SC79.

CONCLUSIONS: The protective role of SC79 against H/R of hepatocytes or hepatic I/R injury is related to activation of phosphorylation of Akt, resulting in the decrease of pro-apoptotic protein of Bim, Bax, and Bad, and increase of the anti-apoptotic protein Bcl-2 and Bcl-xL induced by cell H/R and hepatic I/R injury.

Keywords: Adjuvants, Anesthesia, Liver Failure, Acute, Oncogene Protein v-akt

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750