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异硫氰酸苯己酯对前列腺癌PC3细胞组蛋白乙酰化及Akt信号转导通路的影响

Study on histone acetylation modulation and Akt signaling pathway inhibition by phenyhexyle isothiocyanate in prostate cancer PC3 cell line
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摘要 目的 研究异硫氰酸苯己酯(PHI)对前列腺癌PC3细胞株组蛋白乙酰化及Akt信号转导通路的影响,阐述其诱导细胞凋亡机制. 方法 采用TUNEL法检测PHI对PC3细胞凋亡的影响;蛋白质印迹法观察PC3细胞组蛋白H3、H4乙酰化水平及Akt、p-Akt、mTOR、p-mTOR、p70S6K、p-p70S6K表达的变化. 结果 PHI 0、10、20、40 μmol/L作用7 h后,PC3细胞凋亡率分别为(1.55±0.78)%、(14.30±4.32)%、(49.45±5.63)%、(76.35±6.21)%,呈浓度依赖性(P<0.05).与对照组比较,PHI 10、20、40 μmol/L处理3 h后,H3乙酰化水平分别增加1.22、2.13、3.46倍,7 h后分别增加2.30、3.53、7.64倍;不同浓度PHI处理3 h后,H4乙酰化分别增加1.09、1.45、2.02倍,7 h后分别增加2.52、2.87、3.50倍.Akt、mTOR、p70S6K表达无变化,p-Akt、p-mTOR、p-p70S6K表达均下降.结论 PHI可使PC3细胞株组蛋白H3、H4乙酰化表达增加,且可通过去磷酸化抑制Akt信号转导通路,从而参与了PHI抑制PC3细胞的增殖、诱导凋亡的过程. Objective To investigate phenyhexyle isothiocyanate (PHI) modulating histone acetylation and inhibiting Akt signaling pathway in prostate cancer cell line PC3 in vitro. Methods Apoptotic cells were measured by TUNEL assay. Histone acetylated H3, H4 and the Akt protein signaling pathway (Akt, p-Akt, mTOR, p-mTOR, p70S6K and p-p70S6K) were detected by Western blot. Results Apoptotic cells increased after exposure to PHI with concentration dependent. PHI significantly induced an accumulation of histone acetylated H3, H4. The change of Akt, mTOR, p70S6K proteins was not observed. Phosphorylation of Akt (p- Akt), mTOR (p-mTOR) and p70S6K (p-p70S6K) decreased after exposure to PHI for 7 h. Conclusions PHI can induce histone acetylation H3, H4 accumulation. PHI inhibits Akt signaling pathway resulting cell apoptosis. It might be a new anticancer agent.
出处 《中华泌尿外科杂志》 CAS CSCD 北大核心 2010年第10期707-709,共3页 Chinese Journal of Urology
基金 卫生部科学研究基金福建卫生教育联合攻关计划(wkj2008255) 福建医科大学科研发展专项基金计划(FZS08016)
关键词 异硫氰酸苯己酯 前列腺肿瘤 AKT信号通路 组蛋白 乙酰化 Phenyhexyle isothiocyanate Prostatic neoplasms Akt signaling pathway Histone Acetylation
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参考文献9

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