Radiosensitizing effect of baicalin on human cervical carcinoma HeLa cells / 中国病理生理杂志

ABSTRACT

AIM: To investigate the effect of baicalin on the radiosensitization of HeLa cells .METHODS:The cell activity was determined by MTT assay .The radiosensitivity of HeLa cells was detected by colony formation assay . The cell cycle was analyzed by flow cytometry .The protein levels of Akt , p-Akt, Bad and p-Bad were examined by Western blot.RESULTS:The cell growth of the HeLa cells was inhibited by baicalin dose-dependently and IC 50 was 43.65 mg/L. The results of colony formation assay showed that combination of 8 mg/L baicalin and radiotherapy further improved survival curve and decreased the value of D0 and Dq, as compared with radiotherapy alone (P<0.05).Furthermore, baicalin en-hanced the effect of radiotherapy on cell cycle , as evidenced by the increase in cell percentage in G 2/M phase (P<0.05). Additionally, after incubation with baicalin , radiotherapy-induced phosphorylation of Akt and Bad were further augmented (P<0.05).CONCLUSION:Baicalin augments radiosensitivity of HeLa cells through the inhibition of cell cycle transi -tion and activation of PI3K/Akt signaling pathway.