Cited by 544Cardiac Fibrosis and RemodelingWound Healing and TreatmentsCongenital heart defects research

Macrophage depletion impairs wound healing and increases left ventricular remodeling after myocardial injury in mice

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van Amerongen, Machteld J., Harmsen, Martin C., van Rooijen, Nico, Petersen, Arjen H., van Luyn, Marja J.A.·2007·The American Journal of Pathology

Abstract

Macrophages have been suggested to be beneficial for myocardial wound healing. We investigated the role of macrophages in myocardial wound healing by inhibition of macrophage infiltration after myocardial injury. We used a murine cryoinjury model to induce left ventricular damage. Infiltrating macrophages were depleted during the 1st week after cryoinjury by serial intravenous injections of clodronate-containing liposomes. After injury, the presence of macrophages, which secreted high levels of transforming growth factor-beta and vascular endothelial growth factor-A, led to rapid removal of cell debris and replacement by granulation tissue containing inflammatory cells and blood vessels, followed by myofibroblast infiltration and collagen deposition. In macrophage-depleted hearts, nonresorbed cell debris was still observed 4 weeks after injury. Secretion of transforming growth factor-beta and vascular endothelial growth factor-A as well as neovascularization, myofibroblast infiltration, and collagen deposition decreased. Moreover, macrophage depletion resulted in a high mortality rate accompanied by increased left ventricular dilatation and wall thinning. In conclusion, infiltrating macrophage depletion markedly impairs wound healing and increases remodeling and mortality after myocardial injury, identifying the macrophage as a key player in myocardial wound healing. Based on these findings, we propose that increasing macrophage numbers early after myocardial infarction could be a clinically relevant option to promote myocardial wound healing and subsequently to reduce remodeling and heart failure.

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  1. Yano T, Miura T, Whittaker P, Miki T, Sakamoto J, Nakamura Y, Ichikawa Y, Ikeda Y, Kobayashi H, Ohori K, Shimamoto K: Macro- phage colony-stimulating factor treatment after myocardial infarction attenuates left ventricular dysfunction by accelerating infarct repair. J Am Coll Cardiol 2006, 47:626 -634

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Authors
van Amerongen, M. J., Harmsen, M. C., van Rooijen, N., Petersen, A. H., & van Luyn, M. J. A.
Affiliations
University Medical Center Groningen (NL)
Venue
The American Journal of Pathology
Publisher
Elsevier BV
Published
2007-03
Volume
170
Issue
3
Pages
818-829
ISSN
0002-9440 (ISSN-L)
OpenAlex
W2037994205
Cited by
544
References
37
Citations by year
2026: 17 · 2025: 16 · 2024: 24 · 2023: 29 · 2022: 25 · 2021: 42 · 2020: 40 · 2019: 40 · 2018: 41 · 2017: 46 · 2016: 32 · 2015: 34 · 2014: 31 · 2013: 29 · 2012: 27
FWCI
13.39
Type
journal article
Language
en
Open access
Locations
  • American Journal Of Pathology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (publishedVersion)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (submittedVersion)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac Fibrosis and Remodeling
  • Health Sciences › Medicine › Rehabilitation › Wound Healing and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Congenital heart defects research
Keywords
macrophages, left ventricular remodeling, myocardial injury, macrophage depletion, clodronate liposomes, TGF-beta, VEGF-A, collagen deposition, neovascularization, heart failure, mortality
MeSH terms
Animals, Coronary Vessels, Heart Injuries, Macrophages, Male, Mice, Inbred C57BL, Myocardium, Wound Healing, Neovascularization, Physiologic, Ventricular Remodeling, Vascular Endothelial Growth Factor A, Mice, Transforming Growth Factor beta1

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