Abstract
Among synthetic kinesin spindle protein (KSP) inhibitor compounds, KPYB10602, a six-member lactam-fused carbazole derivative was the most potent in vitro against cell growth of human ovarian cancer, A2780. KPYB10602 caused dose-dependent suppression of tumor growth in vivo. Mitotic arrest due to KPYB10602 was confirmed in vitro, and was characterized by inhibition of securin degradation. Apoptosis after mitotic arrest was associated with an increase in the ratio of pro-apoptotic Bax to anti-apoptotic Bcl-2. Increase of reactive oxygen species (ROS) and caspase pathway were also involved. Furthermore, KPYB10602 caused little neurotoxicity in vivo. Therefore, KPYB10602 could be a promising candidate as an anti-tumor agent with reduced adverse events for treating human ovarian cancer.
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