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    Iloprost, a prostacyclin (PGI2) analogue, reduces liver injury in hepatic ischemia-reperfusion in rats
    (2009) Gedik, Ercan; Girgin, Sadullah; Obay, Basra Deniz; Öztürk, Hayrettin; Öztürk, Hülya; Büyükbayram, Hüseyin
    Purpose: To evaluate the effects of iloprost a prostacyclin analogue on the hepatic IR injury in rats. Methods: Forty male Sprague-Dawley rats (250-300 g) were divided into four groups each containing 10 rats; - (1) controls: data from unmanipulated animals; (2) sham group: rats subjected to the surgical procedure, except for liver I/R, and given saline; (3) I/R group: rats that underwent liver ischemia for 45 min followed by reperfusion for 45 min; (4) I-R/ Iloprost group: rats pretreated with iloprost (10 ?g kg-1, i.v). Liver tissues were taken to determine SOD, CAT, GSH, and MDA levels and for biochemical and histological evaluation. Results: The plasma ALT and AST levels were increased in group 3 than in group 4. MDA values and the liver injury score decreased, while the SOD, CAT, and GSH values increased in group 4 compared to group 3. In group 3, hepatocytes were swollen with marked vacuolization. In group 4, there were regular sinusoidal structures with normal morphology without any signs of congestion. Conclusion: We demonstrated hepatoprotective effects of iloprost against severe ischemia and reperfusion injury in rat liver.
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    Resveratrol attenuates oxidative stress and histological alterations induced by liver ischemia/reperfusion in rats
    (Baishideng Publishing Group Inc, 2008) Gedik, Ercan; Girgin, Sadullah; Öztürk, Hayrettin; Obay, Basra Deniz; Öztürk, Hülya; Büyükbayram, Hüseyin
    AIM: To investigate the effects of resveratrol on liver ischemia/reperfusion (I/R) injury in rats. METHODS: A total of 40 male Sprague-Dawley rats weighing 240-290 g were randomized into four groups of ten: (1) controls: data from unmanipulated animals; (2) sham group: rats subjected to the surgical procedure, except for liver I/R, and given saline; (3) I/R group: rats underwent liver ischemia for 45 min followed by reperfusion for 45 min; (4) I-R/Resveratrol group: rats pretreated with resveratrol (10 mu mol/L, iv). Liver tissues were obtained to determine antioxidant enzyme levels and for biochemical and histological evaluation. RESULTS: Plasma aminotransferase activities were higher in the I/R group than in the I-R/Resveratrol group. Malondialdehyde levels and the hepatic injury score decreased, while superoxide dismutase, catalase, and glutathione peroxidase levels increased in group 4 compared to group 3. In group 4, histopathological changes were significantly attenuated in resveratrol-treated livers. CONCLUSION: These results suggest that resveratrol has protective effects against hepatic I/R injury, and is a potential therapeutic drug for ischemia reperfusionrelated liver injury. (C) 2008 The WIG Press. All rights reserved.