Loss of myeloid cell-derived vascular endothelial growth factor accelerates fibrosis

Christian Stockmann, Yann Kerdiles, Marc Nomaksteinsky, Alexander Weidemann, Norihiko Takeda, Andrew Doedens, Antonio X. Torres-Collado, Luisa Iruela-Arispe, Victor Nizet, Randall S. Johnson

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

Tissue injury initiates a complex series of events that act to restore structure and physiological homeostasis. Infiltration of inflammatory cells and vascular remodeling are both keystones of this process. However, the role of inflammation and angiogenesis in general and, more specifically, the significance of inflammatory cell-derived VEGF in this context are unclear. To determine the role of inflammatory cell-derived VEGF in a clinically relevant and chronically inflamed injury, pulmonary fibrosis, we deleted the VEGF-A gene in myeloid cells. In a model of pulmonary fibrosis in mice, deletion of VEGF in myeloid cells resulted in significantly reduced formation of blood vessels; however, it causes aggravated fibrotic tissue damage. This was accompanied by a pronounced decrease in epithelial cell survival and a striking increase inmyofibroblast invasion. The drastic increase in fibrosis following loss of myeloid VEGF in the damaged lungswas also marked by increased levels of hypoxia-inducible factor (HIF) expression and Wnt/β-catenin signaling. This demonstrates that the process of angiogenesis, driven by myeloid cell-derived VEGF, is essential for the prevention of fibrotic damage.

Original languageEnglish (US)
Pages (from-to)4329-4334
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume107
Issue number9
DOIs
StatePublished - Mar 2 2010

Keywords

  • Angiogenesis
  • Fibrosis
  • Hypoxia
  • Inflammation

ASJC Scopus subject areas

  • General

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