Gui Mingcai, Li Bing, Qi Siguo, et al. 1,25-dihydroxyvitamin D3 induced Hep-2 cells apoptosis through PI3K/AKT/Bcl-2 signaling pathway[J]. Journal of Chongqing Medical University, 2017,42(11):1422-1425.
induced apoptosis in Hep-2 cells and its effect on PI3 K/AKT/Bcl-2 signaling pathway. Methods:Hep-2 cells were processed by different concentrations of 1
25-dihydroxyvitamin D
3
(10-8
10-7 and 10-6 mol/L)for 24
48 and 72 h. The Hep-2 cells proliferation and inhibition rate were detected and calculated by methyl thiazolyl tetrazolium(MTT). Apoptosis rate of Hep-2 cells was detected by flow cytometry. The expression levels of PI3 K/AKT/Bcl-2 were analyzed by Western blot. Results:MTT results showed that 1
25-dihydroxyvitamin D
3
can inhibit the proliferation of Hep-2 cells(P
<
0.05).1
25-dihydroxyvitamin D
3
concentration of 10-6 mol/L inhibition rate was up to 30.71%
in a time-and dose-dependent manner.Flow cytometry showed 1
25-dihydroxyvitamin D
3
with 10-8
10-7 and 10-6 mol/L significantly increased Hep-2 cell apoptosis rate after48 h;the apoptosis rates were 12.13%
14.05%
16.17% respectively
higher than 6.82% of the normal control group(P
<
0.05). Western blot results showed that Bax protein expression increased and PI3 K/AKT/p-AKT/Bcl-2 protein expression decreased after 1
25-dihydroxyvitamin D
3
treatment for 48 h. Conclusion:A certain range of concentration of 1
25-dihydroxyvitamin D
3
(10-6
10-7 and10-8 mol/L)can inhibit proliferation of human laryngeal carcinoma Hep-2 Cells
in a time and dose dependent manner
probably through induced apoptosis. 1
25-dihydroxyvitamin D
3
can up-regulate Bax protein expression and down-regulate PI3 K/AKT/p-AKT/Bcl-2 protein expression to induce the apoptosis of Hep-2 cells.