Antineoplastic Agents. 76. The Sea Urchin Strongylocentrotus droebachiensis

Abstract
An improved procedure based on centrifugation at 37,000 g was developed for isolating the antineoplastic glycoprotein strongylostatin 1 from S. droebachiensis. The green sea urchin also contains a 2nd protein anticancer constituent designated strongylostatin 2. Treatment of the murine P388 lymphocytic leukemia with strongylostatin 2 resulted in 39-42% life extension at a dose of 4.5 mg/kg.