Tetrandrine(Stephania tetrandra extract)
Detection method: HPLC
Botanical Name: stephania tetran dra s．moors
Tetrandrine is a calcium channel blocker.Tetrandrine, a bisbenzylisoquinoline alkaloid, has antitumor effects against some cancers, but its effects on gliomas are unknown. Tetrandrine had cytotoxic effects and induced apoptosis of glioma cells in a concentration- and time-dependent manner. Tetrandrine also inhibited the expression of VEGF in glioma cells, induced cytotoxicity effect on the ECV304 cells and suppressed the in vivo angiogenesis. Tetrandrine (150 mg/kg/day) had significant antitumor effects on subcutaneous tumors and led to slower tumor growth rate, longer animal survival time and higher animal survival (p < 0.05). Tetrandrine also affected intracerebral tumors and prolonged animal survival (p < 0.05) without affecting survival rate. Immunohistochemical analyses showed that the subcutaneous gliomas from tetrandrine-treated rats had fewer microvessel densities than control rats (p = 0.01). The results demonstrate that tetrandrine is cytotoxic to RT-2 glioma cells, has antitumor effects on subcutaneous and intracerebral gliomas, and inhibits angiogenesis in subcutaneous gliomas. Tetrandrine has potential as a treatment for gliomas.
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