Effect of taurine on the proliferation, apoptosis and MST1 / Hippo signaling in prostate cancer cells.

Background: To investigate the effects of taurine on prostate cancer cell proliferation and apoptosis, and on the mammalian sterilization of a 20-like kinase-1 ( MST1 )/ Hippo signaling pathway.
Methods: The prostate cancer DU145 cell line was selected and the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) method was used to determine the rate of inhibition by taurine on the proliferation of the cells at 1, 10 ^-1 , 10 ^-2 , 10 ^-3 , 10 ^-4 , 10 ^-5 and 10 ^-6 mg/mL to obtain the taurine intervention concentrations. The cultured cells were divided into three groups: the blank group was cultured with conventional culture medium, the positive control group was cultured with 2 mg/mL cisplatin, and the taurine group was cultured with the determined taurine intervention concentrations of 0.003 mg/mL as low, 0.03 mg/mL as medium and 0.3 mg/mL as high concentration. After 72 h incubation, cell proliferation, apoptosis and cellular MST1 / Hippo signaling pathway protein expression were observed.
Results: In the comparison of cell proliferation rate, the taurine group was lower than the positive control group and the blank group (P<0.05), the cell proliferation rate of different concentrations in the taurine group decreased with the increase of concentration (P<0.05). The apoptosis rate was higher in the taurine group than in the positive control group and the blank group (P<0.05), the apoptosis rate increased with increasing concentration in the taurine group (P<0.05). The expression of MST1 and Bax was higher in the taurine group than in the positive control group and the blank group (P<0.05), the expression of MST1 and Bax increased with increasing concentration in the taurine group (P<0.05). The expression of YAP and Bcl-2 was lower in the taurine group than in the positive control group and the blank group (P<0.05), the expression of YAP and Bcl-2 decreased with increasing concentration in the taurine group (P<0.05).
Conclusions: Taurine promoted apoptosis and inhibited proliferation of prostate cancer cells, and its mechanism of action may be related to the MST1 / Hippo signaling pathway in a dose-dependent manner.
Competing Interests: Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at https://tcr.amegroups.com/article/view/10.21037/tcr-22-1297/coif). The authors have no conflicts of interest to declare.
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