Liver cell-mediated alleviation of acute ischemic myocardial injury

Front Biosci (Elite Ed). 2010 Jan 1;2:711-24. doi: 10.2741/e131.

Abstract

Cardiomyocyte injury occurs in myocardial ischemia, resulting in impairment of cardiac function. As the endogenous protective function of adult cardiomyocytes is limited, nonmyocytic cells may be activated to protect myocardium from ischemic injury. In this investigation, we demonstrated in a mouse model of myocardial ischemia that the liver was able to respond to myocardial ischemia to upregulate a number of genes encoding secreted proteins, mobilize its cells, and release cell contents into the circulatory system. These naturally occurring mechanisms suggested a possible cardioprotective role for myocardial ischemia-conditioned liver cells and inspired us to develop cardioprotective therapies based on these mechanisms. We demonstrated that administration of liver cell extract derived from myocardial ischemic mice, but not sham control mice, resulted in a significant reduction in acute myocardial infarction as well as the density of TUNEL+ cells in ischemic myocardium compared to administration of PBS at 2, 6, 12, and 24 hrs. These observations suggest that liver cells may respond to myocardial ischemia to express cardioprotective factors, which may be identified and used for alleviating myocardial infarction.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Animals
  • Cell Extracts / pharmacology
  • Cell Extracts / therapeutic use*
  • Cell- and Tissue-Based Therapy / methods*
  • Coronary Vessels / surgery
  • Flow Cytometry
  • Gene Expression Regulation / physiology*
  • In Situ Nick-End Labeling
  • Ligation
  • Liver / cytology
  • Liver / metabolism*
  • Mice
  • Mice, Transgenic
  • Microscopy, Fluorescence
  • Myocardial Ischemia / physiopathology*
  • Myocardial Ischemia / therapy*
  • Oligonucleotide Array Sequence Analysis

Substances

  • Cell Extracts