Abstract
The angiogenic activity in corpus luteum (corpus luteum angiogenesis factor--CLAP) reported first by us in 1977 was enriched by ammonium sulfate precipitation and further purified by ion exchange chromatography. Extracts produced in this way from corpora lutea of cyclus synchronized pigs have proven effective to stimulate DNA synthesis and proliferation of both calf aorta endothelial cells and primary mouse embryo fibroblasts cultivated either under optimal or suboptimal (depletion) conditions. The mitogenic action of these extracts has been found to be dose-dependent and similar to that of bovine brain extract produced according to the preparation method published by GOSPODAROWICZ.
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