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Inhibition of tumour‐induced angiogenesis by systemically administered protamine sulphate

Inhibition of tumour‐induced angiogenesis by systemically administered protamine sulphate Systemic administration of protamine sulphate significantly decreased the intensity of angiogenesis induced in X‐ray immunosuppressed (BALB/c × DBA/2W) F1 mice by either HEp‐2 (human larynx carcinoma) cells or semisyngeneic splenocytes injected intradermally. In vitro experiments have shown that protamine sulphate markedly decreases the proliferation of human endothelial cells as assessed by 3H‐TdR incorporation assay. In contrast, the proliferation of HEp‐2 cells was not affected, and only slight inhibition of normal human fibroblasts could be demonstrated. Heparin abolished the inhibitory effect of protamine sulphate, both in vivo and in vitro. These results suggest that the observed inhibitory effect of protamine sulphate on angiogenesis in vivo may be at least partially due to the interaction of this compound with endothelial cells. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Cancer Wiley

Inhibition of tumour‐induced angiogenesis by systemically administered protamine sulphate

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References (25)

Publisher
Wiley
Copyright
Copyright © 1984 Wiley‐Liss, Inc., A Wiley Company
ISSN
0020-7136
eISSN
1097-0215
DOI
10.1002/ijc.2910330619
Publisher site
See Article on Publisher Site

Abstract

Systemic administration of protamine sulphate significantly decreased the intensity of angiogenesis induced in X‐ray immunosuppressed (BALB/c × DBA/2W) F1 mice by either HEp‐2 (human larynx carcinoma) cells or semisyngeneic splenocytes injected intradermally. In vitro experiments have shown that protamine sulphate markedly decreases the proliferation of human endothelial cells as assessed by 3H‐TdR incorporation assay. In contrast, the proliferation of HEp‐2 cells was not affected, and only slight inhibition of normal human fibroblasts could be demonstrated. Heparin abolished the inhibitory effect of protamine sulphate, both in vivo and in vitro. These results suggest that the observed inhibitory effect of protamine sulphate on angiogenesis in vivo may be at least partially due to the interaction of this compound with endothelial cells.

Journal

International Journal of CancerWiley

Published: Jun 15, 1984

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