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Deltonin, a steroidal saponin, isolated from Dioscorea zingiberensis Wright, with antitumor activity; Deltonin inhibits ERK1/2 and AKT activation.

Deltonin inhibits ERK1/2 and AKT activation. Deltonin (0.5-8 μM) significantly inhibits the proliferation of several colon cancer cell lines including SW480, SW620, LOVO and C26, with IC50s of 1.3, 1.29, 2.11 and 1.22 μM. Deltonin also causes G2-M phase arrest and induces apoptosis in C26 cells[1]. Deltonin (0-5 μM) decreases the phosphorylation of AKT and ERK1/2 levels in MDA?MB?231 cells. Deltonin (0.5-8 μM) also dose-dependently inhibits the proliferation, and causes apoptosis with ROS production in MDA?MB?231 cells[2].

Deltonin (20 and 40 mg/kg, p.o.) reduces the tumor growth of 37.7% and 56.7%, and causes a 50-day survival rate of 60% and 50%, respectively, in mice. Deltonin also inhibits tumor angiogenesis in mice[1].

[1]. Tong QY, et al. Deltonin, a steroidal saponin, inhibits colon cancer cell growth in vitro and tumor growth in vivo via induction of apoptosis and antiangiogenesis. Cell Physiol Biochem. 2011;27(3-4):233-42. [2]. Zhang S, et al. Deltonin induces apoptosis in MDA?MB?231 human breast cancer cells via reactive oxygen species?mediated mitochondrial dysfunction and ERK/AKT signaling pathways. Mol Med Rep. 2013 Mar;7(3):1038-44.

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