Cited by 301Cardiac Fibrosis and RemodelingChemokine receptors and signalingAtherosclerosis and Cardiovascular Diseases

CCR5 Signaling Suppresses Inflammation and Reduces Adverse Remodeling of the Infarcted Heart, Mediating Recruitment of Regulatory T Cells

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Dobaczewski, Marcin, Xia, Ying, Bujak, Marcin, Gonzalez-Quesada, Carlos, Frangogiannis, Nikolaos G.·2010·The American Journal of Pathology

Abstract

Myocardial infarction triggers an inflammatory reaction that is involved in cardiac remodeling. Cardiac repair is dependent on regulatory mechanisms that suppress inflammation and prevent excessive matrix degradation. Chemokine induction in the infarcted heart mediates recruitment of leukocyte subsets with distinct properties. We demonstrate that signaling through the CC chemokine receptor 5 (CCR5) prevents uncontrolled postinfarction inflammation and protects from adverse remodeling by recruiting suppressive mononuclear cells. CCR5 and its ligands macrophage inflammatory protein (MIP)-1alpha and MIP-1beta were markedly induced in the infarcted mouse myocardium. In addition, almost 40% of the mononuclear cells infiltrating the infarct expressed CCR5. CCR5(-/-) mice exhibited marked upregulation of proinflammatory cytokine and chemokine expression in the infarct. In wild-type infarcts CCR5+ mononuclear cells had anti-inflammatory properties, expressing higher levels of IL-10 than CCR5- cells. In contrast, mononuclear cells isolated from CCR5(-/-) infarcts had reduced IL-10 expression. Moreover, enhanced inflammation in the absence of CCR5 was associated with impaired recruitment of CD4+/foxp3+ regulatory T cells (Tregs). The CCR5+ Treg subset exhibited increased IL-10 expression, reflecting potent anti-inflammatory activity. Accentuated inflammation in CCR5(-/-) infarcts was associated with increased matrix metalloproteinase (MMP) expression, reduced TIMP levels, and enhanced MMP-2 and MMP-9 activity, resulting in worse cardiac dilation. These results suggest that CCR5-mediated Treg recruitment may restrain postinfarction inflammation, preventing excessive matrix degradation and attenuating adverse remodeling.

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Crossref · 10.2353/ajpath.2010.090759

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  • Myeloid cells can amplify the stress response in a non-cell autonomous manner through secreted factors.

    “Given the ability of myeloid cells to act as non-cell autonomous amplifiers of the stress-response through secreted factors12-14”

    From Chromatin remodelling drives immune cell–fibroblast communication in heart failure (2024) · cites this paper as [14]

    The Discussion describes inflammatory monocytes secreting cytokines and explains how inflammatory mediators may affect cardiomyocytes and worsen remodeling after myocardial infarction. This supports an effect on other cells through secreted factors, but the paper does not establish that myeloid cells amplify a general stress response. (LLM, conf=0.82)

    Experimental — accuracy not yet measured

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Authors
Dobaczewski, M., Xia, Y., Bujak, M., Gonzalez-Quesada, C., & Frangogiannis, N. G.
Affiliations
Baylor College of Medicine (US)
Corresponding author
Frangogiannis, Nikolaos G.
Venue
The American Journal of Pathology
Publisher
Elsevier BV
Published
2010-05
Volume
176
Issue
5
Pages
2177-2187
ISSN
0002-9440 (ISSN-L)
OpenAlex
W2156101280
Cited by
301
References
39
Citations by year
2026: 11 · 2025: 12 · 2024: 14 · 2023: 15 · 2022: 23 · 2021: 16 · 2020: 30 · 2019: 23 · 2018: 18 · 2017: 18 · 2016: 15 · 2015: 24 · 2014: 21 · 2013: 22 · 2012: 22
FWCI
13.40
Type
journal article
Language
en
Open access
Locations
  • American Journal Of Pathology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
NIH (R01 HL-76246 and R01 HL-85440)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac Fibrosis and Remodeling
  • Health Sciences › Medicine › Oncology › Chemokine receptors and signaling
  • Life Sciences › Immunology and Microbiology › Immunology › Atherosclerosis and Cardiovascular Diseases
Keywords
CCR5, myocardial infarction, cardiac remodeling, regulatory T cells, inflammation, MIP-1α, MIP-1β, IL-10, matrix metalloproteinases, tissue inhibitors of metalloproteinases, extracellular matrix degradation, chemokine signaling, cardiac dilatation
MeSH terms
Animals, Echocardiography, Female, Inflammation, Leukocytes, Mononuclear, Male, Mice, Transgenic, Myocardial Infarction, T-Lymphocytes, Interleukin-10, Receptors, CCR5, Matrix Metalloproteinase 2, Matrix Metalloproteinase 9, T-Lymphocytes, Regulatory, Mice, Chemokine CCL3, Chemokine CCL4

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