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Rebeccamycin (NSC 655649) is a weak topoisomerase I inhibitor isolated from Nocardia sp. It is structurally similar to staurosporine, but does not show any inhibitory activity against protein kinases. It shows significant antitumor properties in vitro (IC50=480nM against mouse B16 melanoma cells and IC50=500nM against P388 leukemia cells). It is an antineoplastic antibiotic and an intercalating agent.
Becatecarin (BMS-181176) is a synthetic analog of rebeccamycin.
Rebeccamycin and becatecarin have been tested in phase II clinical trials for the treatment of lung cancer, liver cancer, breast cancer, lymphoma, retinoblastoma, kidney cancer, and ovarian cancer.
- "Isolation and structure of rebeccamycin - a new antitumor antibiotic from nocardia aerocoligenes": D. E. Nettleton, et al.; Tetrahedron Letters 34, 4011 (1985)
- Production and biological activity of rebeccamycin, a novel antitumor agent: J.A. Bush, et al.; J. Antibiot. (Tokyo) 40, 668 (1987)
- Syntheses and biological activities (topoisomerase inhibition and antitumor and antimicrobial properties) of rebeccamycin analogues bearing modified sugar moieties and substituted on the imide nitrogen with a methyl group F. Anizon, et al.; J. Med. Chem. 40, 3456 (1997)
- DNA cleavage by topoisomerase I in the presence of indolocarbazole derivatives of rebeccamycin: C. Bailly, et al.; Biochemistry 36, 3917 (1997)
- Calories from carbohydrates: energetic contribution of the carbohydrate moiety of rebeccamycin to DNA binding and the effect of its orientation on topoisomerase I inhibition: C. Bailly, et al.; Chem. Biol. 6, 277 (1999)
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