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The Journal of Experimental Medicine logoLink to The Journal of Experimental Medicine
. 1994 Mar 1;179(3):985–992. doi: 10.1084/jem.179.3.985

Terminal complement proteins C5b-9 release basic fibroblast growth factor and platelet-derived growth factor from endothelial cells

PMCID: PMC2191420  PMID: 8113689

Abstract

Interactions between endothelium and vascular smooth muscle cells play a major role in the biology of the blood vessel wall. Growth factors released from endothelial cells control in part the normal and pathological proliferation of vascular smooth muscle cells. Endothelial deposits of C5b-9 proteins, the membrane attack complex of complement (MAC), have been found in a variety of pathological tissues in which cell proliferation is an early characteristic abnormality, including atherosclerosis. We have explored a possible bridging role for terminal complement C5b-9 proteins in eliciting focal signals for cell proliferation by releasing growth factors from endothelial cells. We found that both bovine aortic and human umbilical vein cells respond to the MAC by releasing basic fibroblast growth factor and platelet- derived growth factor. These mitogens stimulate DNA synthesis in Swiss 3T3, vascular smooth muscle, and glomerular mesangial cells. Based on these findings, we propose that complement-induced release of mitogens from endothelial cells is a novel pathogenic mechanism for proliferative disorders.

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Selected References

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