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Journal of Experimental Medicine, Vol 175, 1413-1416, Copyright © 1992 by Rockefeller University Press
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RJ Johnson, EW Raines, J Floege, A Yoshimura, P Pritzl, C Alpers and R Ross
Department of Medicine, University of Washington Medical Center, Seattle 98195.
Platelet-derived growth factor (PDGF), a potent mitogen for mesenchymal cells in culture, is expressed in vivo in a variety of inflammatory conditions associated with cell proliferation, including atherosclerosis, wound repair, pulmonary fibrosis, and glomerulonephritis. However, it is not known if PDGF mediates the fibroproliferative responses that characterize these inflammatory disorders. We administered neutralizing anti-PDGF IgG or control IgG to rats with mesangial proliferative nephritis. Inhibition of PDGF resulted in a significant reduction in mesangial cell proliferation, and largely prevented the increased deposition of extracellular matrix associated with the disease. This suggests that PDGF may have a central role in proliferative glomerular disease.
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