Fig. 5: TPL inhibited the IDH1 and IDH2 enzyme activity.

a The effects of TPL on the phosphorylation of IDH1 and IDH2 in SKOV3 cells were analyzed by a Phos-tag assay. Immunoblots for total IDH1 and IDH2 were also performed on normal SDS–PAGE gels. b, c Enzymatic activity of both IHD1 and IDH2 treated with control and TPL (n = 3). For all experiments, values are mean ± SD carried out in triplicate. *P < 0.05; **P < 0.01; ***P < 0.001; no sign means no significant difference; Student’s t-test.