Transcriptome analysis of the ischemia-reperfused remodeling myocardium: Temporal changes in inflammation and extracellular matrix

Sashwati Roy, Savita Khanna, Donald E. Kuhn, Cameron Rink, Willis T. Williams, Jay L. Zweier, Chandan K. Sen

Research output: Contribution to journalArticle

Abstract

cDNA microarray analysis was performed to screen 15,000 genes and expressed sequence tags (ESTs) to identify changes in the ischemia-reperfused (I-R) rat myocardial transcriptome in the early (day 2) and late (day 7) inflammatory phases of acute myocardial infarction. Lists of candidate genes that were affected by I-R transiently (2 or 7 days only) or on a more sustained basis (2 and 7 days) were derived. The candidate genes represented three major functional categories: extracellular matrix, apoptosis, and inflammation. To expand on the findings from microarray studies that dealt with the two above-mentioned time points, tissues collected from days 0, 0.25, 2, 3, 5, and 7 after reperfusion were examined. Acute myocardial infarction resulted in upregulation of IL-6 and IL-18. Genes encoding extracellular matrix proteins such as types I and III collagen were upregulated in day 2, and that response progressively grew stronger until day 7 after I-R. Comparable response kinetics was exhibited by the candidate genes of the apoptosis category. Caspases-2, -3, and -8 were induced in response to acute infarction. Compared with the myocardial tissue from the sham-operated rats, tissue collected from the infarct region stained heavily positive for the presence of active caspase-3. Laser microdissection and pressure catapulting technology was applied to harvest infarct and adjacent noninfarct control tissue from a microscopically defined region in the rat myocardium. Taken together, this work presents the first evidence gained from the use of DNA microarrays to understand the molecular mechanisms implicated in the early and late inflammatory phases of the I-R heart.

Original languageEnglish (US)
Pages (from-to)364-374
Number of pages11
JournalPhysiological Genomics
Volume25
Issue number3
DOIs
Publication statusPublished - May 16 2006
Externally publishedYes

    Fingerprint

Keywords

  • Heart
  • Oxygen
  • Perceived hyperoxia
  • Wound healing

ASJC Scopus subject areas

  • Physiology
  • Genetics

Cite this