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    The protective effects of dexmedetomidine on hepatic ischemia reperfusion injury
    (Comenius University, 2014) Kucuk A.; Yaylak F.; Cavunt-Bayraktar A.; Tosun M.; Arslan M.; Comu F.M.; Kavutcu M.
    Objective: The aim of this study was to evaluate the effect of dexmedetomidine (100 ?g/kg-ip) on liver ischemia and reperfusion (I/R) in rats. Methods: Twenty-four Wistar Albino rats were separated into three groups as control (C), ischemia-reperfusion injury (I/R) and dexmedetomidine group (I/R-D). Ischemia was induced with portal clampage for 45 minutes and reperfusion period was 45 minutes after declampage. Group I/R-D was received dexmedetomidine 100 ?g/ kg i.p. 30 min before portal clampage. Thiobarbutiric Acid-Reactive Substances (TBARS), glutathioneS-transferase (GST), superoxide dismutase (SOD), Catalase (CAT), and Paraoxonase 1 (PON-1) were investigated in blood samples. Also HSP60 and p53-positive hepatocytes were counted under ImageJ image analysis program. Results: All parameters, except GST levels, were significant between the groups (p < 0.05). Although HSP60 expression was significantly increased between I/R, I/R-D and C groups there were no significant differences between I/R-D and C (p = 0.443). On the other hand, p53 expression was also significantly increased between I/R, I/R-D and C groups At the same time, there were no significant differences between I/R-D and C groups (p = 0.354). Conclusion: All the results suggest that dexmedetomidine has beneficial effects on liver ischemia/reperfusion stress.