坦索罗辛对前列腺癌PC-3细胞增殖与凋亡的影响
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篇名: 坦索罗辛对前列腺癌PC-3细胞增殖与凋亡的影响
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摘要: 目的:研究坦索罗辛对前列腺癌PC-3细胞增殖与凋亡的影响。方法:以0(空白对照组)、12.5、25、50 μmol/L坦索罗辛(坦索罗辛低、中、高浓度组)作用于PC-3细胞48 h后,通过MTT法检测细胞活力,Hoechst 33258染色检测细胞凋亡率,Western blot法检测核糖体Bax、B淋巴细胞瘤2(Bcl-2)蛋白表达及蛋白激酶B(Akt)、哺乳动物雷帕霉素靶蛋白(mTOR)、S6蛋白激酶(p70S6K)、4E结合蛋白1(4E-BP1)的磷酸化水平。结果:与空白对照组比较,坦索罗辛低、中、高浓度组PC-3细胞活力和Akt、p70S6K、4E-BP1磷酸化水平均降低,Bax蛋白表达水平升高(P<0.05或P<0.01);坦索罗辛中、高浓度组PC-3细胞的凋亡率升高,Bcl-2蛋白表达和mTOR磷酸化水平降低(P<0.01),上述效果均呈浓度依赖性。结论:坦索罗辛能抑制前列腺癌PC-3细胞增殖并诱导其凋亡,其机制可能与抑制Akt/mTOR信号通路激活有关。
ABSTRACT: OBJECTIVE: To explore the effects of tamsulosin on proliferation and apoptosis in prostatic cancer PC-3 cells. METHODS: After treated with 0 (blank control group), 12.5, 25 and 50 μmol/L tamsulosin (tamsulosin low, medium and high-concentration groups) for 48 h, the viability of PC-3 cells was detected by MTT method. Hoechst 33258 staining was used to detect cell apoptosis rate. Western blot was used to determine the expression level of Bax and Bcl-2 protein, and the phosphorylation level of protein kinase B (Akt), mammalian target rapamycin (mTOR), ribosomal S6 protein kinase (p70S6K) and 4E binding protein 1 (4E-BP1). RESULTS: Compared with blank control group, PC-3 cells viability and the phosphorylation level of Akt, p70S6K and 4E-BP1 decreased in tamsulosin low, medium and high-concentration groups, while expression level of Bax protein increased (P<0.05 or P<0.01); the apoptosis rate of PC-3 cells was increased in tamsulosin medium and high-concentration groups, while the expression level of Bcl-2 and phosphorylation level of mTOR were decreased (P<0.01), in concentration-dependent manner. CONCLUSIONS: Tamsulosin can inhibit PC-3 cells proliferation and induce cell apoptosis via blocking Akt/mTOR signal pathway.
期刊: 2016年第27卷第7期
作者: 赵明,金珊,何锦华
AUTHORS: ZHAO Ming,JIN Shan,HE Jinhua
关键字: 坦索罗辛;前列腺癌PC-3细胞;增殖;凋亡;蛋白激酶B;哺乳动物雷帕霉素靶蛋白
KEYWORDS: Tamsulosin; Prostatic cancer PC-3 cells; Proliferation; Apoptosis; Protein kinase B; Mammalian target rapamycin
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