Inhibition of tumour-induced angiogenesis by systemically administered protamine sulphate
✍ Scribed by Slsawomir Majewski; Marek J. Kamińki; Andrzej Szmurlo; Grazyna Kamińska; Jacek Malejczyk
- Publisher
- John Wiley and Sons
- Year
- 1984
- Tongue
- French
- Weight
- 335 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0020-7136
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✦ Synopsis
Abstract
Systemic administration of protamine sulphate significantly decreased the intensity of angiogenesis induced in X‐ray immunosuppressed (BALB/c × DBA/2W) F~1~ 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 ^3^H‐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.