Systematic Characterization of Myocardial Inflammation, Repair, and Remodeling in a Mouse Model of Reperfused Myocardial Infarction

Panagiota Christia, Marcin Bujak, Carlos Gonzalez-Quesada, Wei Chen, Marcin Dobaczewski, Anilkumar Reddy, Nikolaos G. Frangogiannis

Research output: Contribution to journalArticle

51 Scopus citations

Abstract

Mouse models of myocardial infarction are essential tools for the study of cardiac injury, repair, and remodeling. Our current investigation establishes a systematic approach for quantitative evaluation of the inflammatory and reparative response, cardiac function, and geometry in a mouse model of reperfused myocardial infarction. Reperfused mouse infarcts exhibited marked induction of inflammatory cytokines that peaked after 6 hr of reperfusion. In the infarcted heart, scar contraction and chamber dilation continued for at least 28 days after reperfusion; infarct maturation was associated with marked thinning of the scar, accompanied by volume loss and rapid clearance of cellular elements. Echocardiographic measurements of end-diastolic dimensions correlated well with morphometric assessment of dilative remodeling in perfusion-fixed hearts. Hemodynamic monitoring was used to quantitatively assess systolic and diastolic function; the severity of diastolic dysfunction following myocardial infarction correlated with cardiomyocyte hypertrophy and infarct collagen content. Expression of molecular mediators of inflammation and cellular infiltration needs to be investigated during the first 72 hr, whereas assessment of dilative remodeling requires measurement of geometric parameters for at least four weeks after the acute event. Rapid initiation and resolution of the inflammatory response, accelerated scar maturation, and extensive infarct volume loss are important characteristics of infarct healing in mice.

Original languageEnglish (US)
Pages (from-to)555-570
Number of pages16
JournalJournal of Histochemistry and Cytochemistry
Volume61
Issue number8
DOIs
StatePublished - May 1 2013

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Keywords

  • cardiac remodeling
  • cardiomyocyte
  • cytokine
  • fibroblast
  • inflammation
  • myocardial infarction

ASJC Scopus subject areas

  • Anatomy
  • Histology

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