p53:凋亡的组织者
首发时间:2007-12-26
摘要:p53在细胞内压力、端粒侵蚀、DNA损伤刺激下稳定性增加,并且通过一系列磷酸化、乙酰化修饰使其激活,进而发挥其作为转录因子的功能转录下游基因,最终诱导细胞周期阻滞或者凋亡。而最新的研究表明,p53也能直接在细胞质中发挥其促凋亡作用,并且该过程不依赖于其核内的转录活性。此外,在特定的刺激下,p53的转录依赖性与转录非依赖性促凋亡作用存在着偶联和协同机制,从而有效的决定细胞在生存与死亡间进行选择。本文将对近年来关于细胞凋亡中p53转录依赖性和转录非依赖性调控机制的研究进行综述。
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p53: The Organizer of Apoptosis
Abstract:p53 responds to cellular stress and triggers many downstream events including apoptosis. Traditionally, most apoptogenic effects of p53 are ascribed to its function as a transcription factor. However, recent reports elucidate that p53 can launch apoptosis in cytoplasm independently of transcriptional activities. The transcription dependent and independent proapoptotic activities of p53 function in a coordinated manner to elicit a significantly apoptogenic cascade making a final decision between survival and death. We review recent discoveries in the p53 regulation machinery and delineate a coordinated potential switch in apoptosis
Keywords: p53 apoptosis transcription-dependent transcription-independent tumor
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No.1739417685011986****
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