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Related Experiment Videos

Intraperitoneal injection induces a delayed preconditioning-like effect in mice.

Fausto Labruto1, Jarle Vaage, Guohu Li

  • 1Crafoord Laboratory for Experimental Surgery, Karolinska Institute, Stockholm, Sweden. lampo18@yahoo.com

Laboratory Animals
|July 12, 2005
PubMed
Summary
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Intraperitoneal injections of opioid anesthetics or fluid 24 hours prior can protect mouse hearts from ischemia-reperfusion injury, mimicking a preconditioning effect. The exact protective mechanism requires further investigation.

Area of Science:

  • Cardiovascular Physiology
  • Anesthesiology
  • Cellular Biology

Background:

  • Preconditioning can protect the heart from ischemic injury.
  • The potential for delayed preconditioning effects from anesthetics or fluid administration is not well understood.

Purpose of the Study:

  • To investigate if intraperitoneal injections of anesthetics or fluid induce a delayed preconditioning-like response in mouse hearts.
  • To assess the impact of these interventions on heart function and infarct size after ischemia-reperfusion.

Main Methods:

  • Mice received intraperitoneal injections of opioid anesthetics, Ringer's solution, or sham treatments 24 hours before heart isolation.
  • Isolated hearts underwent global ischemia and reperfusion, with function assessed.
  • Infarct size was measured using triphenyltetrazolium chloride staining.

Related Experiment Videos

  • MAP kinase phosphorylation and NF-kappaB activation were analyzed in a subset of experiments.

    • Main Results:

    • Opioid anesthesia administered 24 hours prior attenuated ischemia-induced left ventricular dysfunction and reduced infarct size.
    • Ringer's solution injection, but not a sham needle prick, also reduced infarct size.
    • The protective effects of Ringer's solution were comparable to classic preconditioning.
    • No significant changes in cardiac MAP kinases or NF-kappaB activation were observed.

    Conclusions:

    • Intraperitoneal administration of opioid anesthetics and fluid can induce a delayed preconditioning-like effect in the mouse heart.
    • The underlying molecular mechanisms responsible for this observed protection remain to be elucidated.