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Gambogic acid (GA) has been wildly studied to show potent anti-tumor effects in vivo and in vitro. We have confirmed that GA stabilized and activated p53 through down-regulating the expression of MDM2 in variety of cancer cell lines. However, GA-induced p53 activation could be partially reversed by caffeine, a PI3k inhibitor. Therefore, questions of whether GA induces post-translational modifications...
Gambogic acid (GA), the natural compound extracted from gamboges, has recently been established as a potent anti-tumor agent. Although it was proved that GA enhances p53 protein level through inhibition of MDM2 in p53 wild-type cancer cells, the mechanisms of MDM2 inhibition especially with the absence of p53 are not fully understood. Herein we further studied the MDM2 regulation by GA and propose...
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