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. 1999 Dec;81(8):1269–1273. doi: 10.1038/sj.bjc.6692167

Generation of angiostatin-like fragments from plasminogen by prostate-specific antigen

H-H Heidtmann 1, D M Nettelbeck 3, A Mingels 3, R Jäger 3, H-G Welker 4, R E Kontermann 2
PMCID: PMC2362961  PMID: 10604721

Abstract

Angiostatin, a potent inhibitor of angiogenesis, tumour growth and metastasis, is a biologically active fragment of plasminogen, containing the kringle domains 1–4. It is generated from plasminogen by limited proteolysis. We show that prostate-specific antigen (PSA), a serine proteinase secreted by human prostate and human prostate cancer cells, is able to convert Lys-plasminogen to biologically active angiostatin-like fragments, containing kringles 1–4, by limited proteolysis of peptide bond Glu439–Ala440 in vitro. In an in vitro morphogenesis assay, the purified angiostatin-like fragments inhibited proliferation and tubular formation of human umbilical vein endothelial cells with the same efficacy as angiostatin. This finding might help to understand growth characteristics of prostate cancer, which usually has low microvessel density and slow proliferation. © 1999 Cancer Research Campaign

Keywords: angiostatin, PSA, plasminogen, prostate cancer, anti-angiogenesis

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Selected References

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