title: Protective effect of ischemic postconditioning against hepatic ischemic reperfusion injury in rat liver.
abstract: OBJECTIVE
  The efficiency of ischemic postconditioning (IPC) was evaluated in a rat model of ischemic liver. Concentration of survivin of liver tissue correlated with the degree of antiapoptosis, so survivin was estimated to evaluate the efficiency of IPC on ischemic reperfusion (IR) injury.
  
  
  METHODS
  Twenty-four healthy rats were divided to three groups (SHAM, IR, and IPC). Rats in the SHAM group displayed no change during 3 hours. Rats in the IR group were ischemic within 1 hour of clamping the left hepatic artery and left portal vein. Reperfusion for 2 hours was then done. IPC group, intermittent 2, 3, 5, and 7 minutes of reperfusion followed by 1 hour of warm ischemia. Two-minute reocclusion was done after each reperfusion. Rat sera were analyzed for AST and ALT, and Western blot analysis of rat liver tissue of rats evaluated malondialdehyde (MDA) and survivin.
  
  
  RESULTS
  MDA in the liver tissue of rats in the IR and IPC group were significantly high than in the liver tissue of the SHAM group (P = 0.003 and P = 0.008, respectively). Survivin was higher in the IPC group than in the SHAM and IR groups (P = 0.021 and P = 0.024, respectively).
  
  
  CONCLUSIONS
  IPC could not prevent lipid oxidation in liver cell mitochondria, but did aid in the regeneration of ischemic injured liver cells. The results indicate that IPC can suppress the apoptosis of liver cells and reduce reperfusion injury of liver tissue.
authors.affiliation: Department of Surgery, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea.
authors.forename: Sam-Youl
authors.initials: SY
authors.lastname: Yoon
authors.affiliation: Department of Surgery, DamSoYu Hospital, Seoul, Korea.
authors.forename: Chung Yun
authors.initials: CY
authors.lastname: Kim
authors.affiliation: Department of Surgery, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea.
authors.forename: Hyung Joon
authors.initials: HJ
authors.lastname: Han
authors.affiliation: Department of Surgery, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea.
authors.forename: Kun Ok
authors.initials: KO
authors.lastname: Lee
authors.affiliation: Department of Surgery, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea.
authors.forename: Tae-Jin
authors.initials: TJ
authors.lastname: Song
keywords: Ischemic postconditioning; Ischemic reperfusion injury; Liver