Open AccessVEGFR2 + PDGFRβ + circulating precursor cells participate in capillary restoration after hyperoxia acute lung injury (HALI)
Author(s) -
Jones Rosemary,
Capen Diane E.,
Jacobson Margaretha,
Cohen Kenneth S.,
Scadden David T.,
Duda Dan G.
Publication year - 2009
Publication title -
journal of cellular and molecular medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.44
H-Index - 130
eISSN - 1582-4934
pISSN - 1582-1838
DOI - 10.1111/j.1582-4934.2009.00785.x
Subject(s) - hyperoxia , haematopoiesis , biology , population , phenotype , integrin alpha m , lung , growth factor , flow cytometry , cancer research , microbiology and biotechnology , pathology , receptor , immunology , stem cell , medicine , biochemistry , environmental health , gene
The in vivo morphology and phenotype of circulating cells that spontaneously contribute to new vessel formation in adults remain unclear. Here, we use high‐resolution imaging and flow cytometry to characterize the morphology and phenotype of a distinct population of circulating mononuclear cells contributing to spontaneous new vessel formation after hyperoxia acute lung injury (HALI). We identify a subpopulation of myeloid (CD11b/Mac1 + ) haematopoietic cells co‐expressing vascular endothelial growth factor receptor 2 (VEGFR2) and platelet derived growth factor receptor beta (PDGFRβ). Moreover, we show that these CD11b + VEGFR2 + PDGFRβ + circulating precursor cells (CPCs) contribute structurally to the luminal surface of capillaries re‐forming 2 weeks post‐HALI. This indicates that these myeloid CPCs may function, at least transiently, as putative vascular precursors, and has important implications for capillary growth and repair in injury and in pathologies of the lung and other organs.