Ischemia-reperfusion syndrome: an alternative experimental model

J Cardiovasc Surg (Torino). 1994 Oct;35(5):431-6.

Abstract

Objective: To design an alternative experimental model of ischemia-reperfusion syndrome. Our model mimics the clinical pattern of the syndrome and also assesses the efficacy of therapeutical protocols.

Experimental design: Ischemia was induced under general anaesthesia in the posterior limbs of 10 sheep by occluding the aorta and vena cava by means of two-way balloon catheters. Ischemia was stopped after 4 hours and blood and histologic parameters determined in the first three hours of revascularization. The animals were divided into three groups: a group of 3 sheep in which a sham operation was performed; a control group (5) to assess the efficacy of induced ischemia; the third group (5) to determine the effect of antioxidant and membrane protective drugs to assess the reliability of the model to study the ischemia-reperfusion syndrome.

Results: At the end of ischemia, skin temperature was decreased (p < 0.04) both in control and treated groups, pH decreased significantly soon after reperfusion in the control group (p < 0.04). Reperfusion in control sheep, compared with treated animals, was followed by a significant increase in CPK blood levels (p < 0.009), related to marked muscle damage, in particular after reperfusion. Tissue damage detected at TEM was less severe in treated animals.

Conclusions: This model is an effective experimental strategy and a means of assessing preventive treatment.

Publication types

  • Comparative Study

MeSH terms

  • Animals
  • Disease Models, Animal*
  • Microscopy, Electron
  • Muscles / blood supply
  • Muscles / ultrastructure
  • Random Allocation
  • Reperfusion Injury / etiology*
  • Reperfusion Injury / pathology
  • Reperfusion Injury / physiopathology
  • Sheep
  • Skin Temperature
  • Statistics, Nonparametric
  • Time Factors