Characterization of the inflammatory and fibrotic response in a mouse model of cardiac pressure overload

Ying Xia, Keunsang Lee, Na Li, Daniel Corbett, Leonardo Mendoza, Nikolaos G. Frangogiannis

Research output: Contribution to journalArticle

132 Citations (Scopus)

Abstract

Myocardial fibrosis is an integral component of most cardiac pathologic conditions and contributes to the development of both systolic and diastolic dysfunction. Because of the availability of genetically manipulated animals, mouse models are essential for understanding the mechanisms involved in the pathogenesis of cardiac fibrosis. Accordingly, we characterized the inflammatory and fibrotic response in a mouse model of cardiac pressure overload due to transverse aortic constriction (TAC). Following TAC, mouse hearts exhibited induction of chemokines and proinflammatory cytokines, associated with macrophage, but not neutrophil, infiltration. Induction of inflammatory cytokines was followed by a late upregulation of transforming growth factor (TGF)-β isoforms, activation of the Smad2/3 and Smad1/5 pathways, induction of matricellular proteins, and deposition of collagen. Inflammatory activity decreased after 28 days of TAC; at this timepoint established fibrosis was noted, accompanied by ventricular dilation and systolic dysfunction. Late induction of inhibitory mediators, such as TGF-β, may play an essential role in the transition from inflammation to fibrosis by suppressing inflammatory gene synthesis while inducing matrix deposition. Our findings identify molecular mediators and pathways with a potential role in cardiac fibrosis laying the foundations for studies exploring the pathogenesis of fibrotic cardiac remodeling using genetically targeted mice.

Original languageEnglish (US)
Pages (from-to)471-481
Number of pages11
JournalHistochemistry and Cell Biology
Volume131
Issue number4
DOIs
StatePublished - Apr 2009
Externally publishedYes

Fingerprint

Fibrosis
Pressure
Constriction
Transforming Growth Factors
Cytokines
Neutrophil Infiltration
Chemokines
Dilatation
Protein Isoforms
Up-Regulation
Collagen
Animal Models
Macrophages
Inflammation
Genes
Proteins

Keywords

  • Cardiac fibrosis
  • Chemokine
  • Cytokine
  • Inflammation
  • TGF-β

ASJC Scopus subject areas

  • Cell Biology
  • Histology
  • Medical Laboratory Technology
  • Molecular Biology

Cite this

Characterization of the inflammatory and fibrotic response in a mouse model of cardiac pressure overload. / Xia, Ying; Lee, Keunsang; Li, Na; Corbett, Daniel; Mendoza, Leonardo; Frangogiannis, Nikolaos G.

In: Histochemistry and Cell Biology, Vol. 131, No. 4, 04.2009, p. 471-481.

Research output: Contribution to journalArticle

Xia, Ying ; Lee, Keunsang ; Li, Na ; Corbett, Daniel ; Mendoza, Leonardo ; Frangogiannis, Nikolaos G. / Characterization of the inflammatory and fibrotic response in a mouse model of cardiac pressure overload. In: Histochemistry and Cell Biology. 2009 ; Vol. 131, No. 4. pp. 471-481.
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