Sangivamycin (NSC 65346), a nucleoside analog, is a potent inhibitor of protein kinase C (PKC) with an Ki of 10 μM. Sangivamycin has potent antiproliferative activity against a variety of human cancers[1][2].
Sangivamycin has differential antitumor effects in drug-sensitive MCF7/wild type (WT) cells, causing growth arrest, and in multidrug-resistant MCF7/adriamycin-resistant (ADR) human breast carcinoma cells, causing massive apoptotic cell death[2].Sangivamycin (0.3 μM; 0-72 hours), shows almost maximal cytocidal (for MCF7/ADR) or cytostatic (for MCF7/WT) effects[2].Sangivamycin activates caspases in MCF7/ADR cells. Upon exposure of MCF7/ADR cells to Sangivamycin (0.3 μM;), a vast amount of cleavage of lamin A to a 28-kDa fragment is detected within 48 hours[2].
[1]. Loomis CR, Bell RM. Sangivamycin, a nucleoside analogue, is a potent inhibitor of protein kinase C. J Biol Chem. 1988;263(4):1682-1692.
[2]. Lee SA, et al. The nucleoside analog sangivamycin induces apoptotic cell death in breast carcinoma MCF7/adriamycin-resistant cells via protein kinase Cdelta and JNK activation. J Biol Chem. 2007;282(20):15271-15283.