Kuguaglycoside C induces caspase-independent cell death, and is involved, at least in part, in the mechanism underlying cell necroptosis.
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Kuguaglycoside C, a constituent of Momordica charantia, induces caspase-independent cell death of neuroblastoma cells.[Pubmed: 22957888
Kuguaglycoside C is a triterpene glycoside isolated from the leaves of Momordica charantia, and the biological effects of this compound remain almost unknown.
METHODS AND RESULTS:
We investigated the anti-cancer effect of Kuguaglycoside C against human neuroblastoma IMR-32 cells. In the MTT assay, Kuguaglycoside C induced significant cytotoxicity against the IMR-32 cells (IC(50) : 12.6 μM) after 48 h treatment. Although examination by Hoechst 33342 staining revealed that Kuguaglycoside C induced nuclear shrinkage at a high concentration (100 μM), no apoptotic bodies were observed on flow cytometry. No activation of caspase-3 or caspase-9 was observed at the effective concentration (30 μM) of Kuguaglycoside C. On the other hand, the substance significantly decreased the expression of survivin and cleaved poly (ADP-ribose) polymerase (PARP). Kuguaglycoside C also significantly increased the expression and cleavage of apoptosis-inducing factor (AIF). Moreover, Kuguaglycoside C was found to induce caspase-independent DNA cleavage in the dual-fluorescence apoptosis detection assay.
These results suggest that Kuguaglycoside C induces caspase-independent cell death, and is involved, at least in part, in the mechanism underlying cell necroptosis.