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首页> 外文期刊>Technology in cancer research & treatment. >The Circadian Gene Clock Plays an Important Role in Cell Apoptosis and the DNA Damage Response In Vitro
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The Circadian Gene Clock Plays an Important Role in Cell Apoptosis and the DNA Damage Response In Vitro

机译:昼夜节律基因时钟在细胞凋亡和DNA损伤反应中起重要作用

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摘要

The Clock gene, an indispensable component of the circadian clock, not only modulates circadian oscillations but also regulates organismal function. We examined whether silencing the expression of the human Clock gene in glioma cells influences cell growth and induces apoptosis after irradiation. Silencing the expression of Clock in a human glioma cell line (U87MG), but not in a control glioma cell line, resulted in increased apoptosis and cell cycle arrest. Moreover, silencing Clock expression altered the expression of apoptosis-related genes. The protein levels of c-Myc and Cyclin B1 were downregulated, but those of p53 were upregulated, in human Clock-silenced U87MG cells compared with control cells. Our results suggest that the circadian gene human Clock may play an important role in carcinogenesis by inhibiting apoptotic cell death via attenuating proapoptotic signaling.
机译:Clock基因是生物钟不可缺少的组成部分,不仅可以调节生物钟振荡,还可以调节机体功能。我们检查了在胶质瘤细胞中沉默人类Clock基因的表达是否会影响细胞生长并在辐射后诱导细胞凋亡。沉默人脑神经胶质瘤细胞系(U87MG)中Clock的表达,而不是对照神经胶质瘤细胞系中Clock的表达,导致凋亡增加和细胞周期停滞。此外,沉默时钟表达改变凋亡相关基因的表达。与对照细胞相比,Clock-沉默的U87MG细胞中c-Myc和Cyclin B1的蛋白水平下调,而p53的蛋白水平上调。我们的结果表明,昼夜节律基因人Clock可能通过减弱促凋亡信号传导来抑制凋亡细胞死亡,从而在致癌作用中发挥重要作用。

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