Cyclosporin A pretreatment in a rat model of warm ischaemia/reperfusion injury

J Hepatol. 2002 Feb;36(2):241-7. doi: 10.1016/s0168-8278(01)00248-3.

Abstract

Background/aims: These studies investigated the role of apoptosis following ischaemia/reperfusion (I/R) injury to the liver and the effect of pretreatment with Cyclosporin A.

Methods: Male Sprague-Dawley rats received 30 min of warm ischaemia followed by a period of reperfusion of 6 h. Rats were given olive oil or Cyclosporin A (30 mg/kg p.o.) the day before surgery. Neutrophil numbers were assessed in haematoxylin-eosin-stained sections of liver. In situ staining of sections using TdT-mediated dUTP-fluorescein nick-end labelling was carried out to determine the extent of apoptosis, followed by electron microscopy. Semi-quantitative polymerase chain reaction (PCR) analysis of the transcript for Fas antigen was performed.

Results and conclusions: High levels of apoptosis were observed in I/R injury, which were greatly ameliorated in Cyclosporin A-pretreated groups. PCR analysis indicated a reduction in the level of expression of Fas transcript in Cyclosporin A-treated rats. Histological analysis showed a significant increase in the number of neutrophils infiltrating I/R-injured tissue (62 +/- 10.69, n=16), which was markedly reduced by Cyclosporin A pretreatment (16 +/- 7, n=6, P<0.05). These results indicate a role of parenchymal apoptosis in the pathogenesis of I/R injury, which occurs in association with neutrophil infiltration, both of which can be significantly reduced by Cyclosporin A pretreatment.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Apoptosis / drug effects
  • Cyclosporine / pharmacology*
  • Disease Models, Animal
  • Hot Temperature
  • Immunosuppressive Agents / pharmacology*
  • In Situ Nick-End Labeling
  • Liver / immunology
  • Liver / pathology*
  • Liver / ultrastructure
  • Male
  • Microscopy, Electron
  • Neutrophils / cytology
  • Rats
  • Rats, Sprague-Dawley
  • Reperfusion Injury / drug therapy*
  • Reperfusion Injury / pathology

Substances

  • Immunosuppressive Agents
  • Cyclosporine