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Pharmacologic modulation of experimental postischemic hepatic function.

S J Ontell1, L Makowka, J Trager

  • 1Department of Surgery, University of Pittsburgh School of Medicine, Pennsylvania.

Annals of Surgery
|February 1, 1989
PubMed
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SRI 63-441 pretreatment significantly reduces liver warm ischemic injury, improving bile production and decreasing enzyme release. Superoxide dismutase (SOD) showed benefits during reperfusion, while ibuprofen had no effect.

Area of Science:

  • Hepatology
  • Ischemia-Reperfusion Injury
  • Pharmacology

Background:

  • Warm ischemia causes significant hepatic damage.
  • Platelet activating factor (PAF) and free radicals are implicated in this injury.
  • Current treatments for ischemic injury have limitations.

Purpose of the Study:

  • To compare the efficacy of SRI 63-441, superoxide dismutase (SOD), and ibuprofen in mitigating warm hepatic ischemic injury.
  • To evaluate the protective effects of these agents on liver function and structure post-ischemia.
  • To determine the optimal timing for therapeutic intervention.

Main Methods:

  • Isolated rat liver perfusion model following 90 minutes of warm ischemia.
  • Assessment of hepatic function through bile production and transaminase release.

Related Experiment Videos

  • Measurement of tissue adenosine triphosphate (ATP) levels.
  • Evaluation of hepatocellular damage using electron microscopy.
  • Administration of SRI 63-441 intravenously prior to ischemia, SOD and ibuprofen during reperfusion.

    • Main Results:

    • SRI 63-441 pretreatment significantly increased bile production and ATP content, while decreasing transaminase release.
    • SOD improved bile production and reduced transaminase levels only when added during reperfusion.
    • Ibuprofen did not demonstrate any protective effect on post-ischemic hepatic function.
    • Electron microscopy showed less severe hepatocellular vacuolization in SRI 63-441 pretreated livers.

    Conclusions:

    • SRI 63-441 pretreatment offers significant protection against hepatic warm ischemic injury.
    • SRI 63-441 appears more effective than SOD and ibuprofen in this specific model of liver ischemia.
    • These findings highlight the therapeutic potential of PAF antagonists in organ preservation and treatment of ischemic injury.