Objective: Objective to investigate the protective effects of Ligustrazine preconditioning against hepatic ischemia/reperfusion injury (IRI) in rats.

Methods: Fifty male Wistar rats were randomly allocated into 3 groups: sham operation group, in which animals underwent laparotomy, experimental group and control group in which were treated with 70% IRI of the liver, especially, the animals in experimental group was given intraperitoneal injection of 2 mL Ligustrazine per day for 3 days before operation. After the operation, liver tissues were harvested at 1 h, 6 h, 24 h and 72 h for the study of histomorphological change, the respiratory control ratio (RCR) and phosphorus: oxygen ratio (P/O) of hepatocytes mitochondria, and the contents of adenosine triphosphate (ATP) of liver tissue.

Results: (1) The damage hepatic tissue in experimental group was slighter than that in control group at each corresponding time-point after operation. (2) The RCR and P/O ratio at each corresponding time-point were higher in experimental group than those in control group (P < 0.05), and all of the two groups recovered after 72 h. (3) The ATP concentration in experimental group also was higher than that in control group at each corresponding time-point, and recovered faster than control group.

Conclusion: The current results show that Ligustrazine preconditioning may improve energy metabolism of rat liver in ischemia reperfusion injury.

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