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. 1991 Apr;138(4):829–833.

Inhibition of angiogenesis in vitro by Arg-Gly-Asp-containing synthetic peptide.

R F Nicosia 1, E Bonanno 1
PMCID: PMC1886093  PMID: 1707235

Abstract

This study was designed to evaluate the effect of the synthetic peptide Gly-Arg-Gly-Asp-Ser (GRGDS) on angiogenesis in serum-free collagen gel culture of rat aorta. The GRGDS peptide contains the amino acid sequence Arg-Gly-Asp (RGD), which has been implicated as a recognition site in interactions between extracellular matrix (ECM) molecules and cell membrane receptors. RGD-containing synthetic peptides are known to inhibit attachment of endothelial cells to substrates, but their effect on angiogenesis has not been fully characterized. Aortic explants embedded in collagen gel in the absence of GRGDS generated branching microvessels through a process of endothelial migration and proliferation. Addition of GRGDS to the culture medium caused a marked inhibition of angiogenesis. In contrast, GRGES, a control peptide lacking the RGD sequence, failed to inhibit angiogenesis. The inhibitory effect of GRGDS was nontoxic and reversible. The angiogenic activity of aortic explants previously inhibited with GRGDS could be restored by incubating the cultures in GRGDS-free medium. These findings suggest that angiogenesis is an anchorage-dependent process that can be inhibited by interfering with the attachment of endothelial cells to the ECM. It also indicates that synthetic peptides can be used as probes to study the mechanisms by which the ECM regulates angiogenesis.

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Selected References

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