m S312D, University of California, San Francisco, San Francisco, CA 94143, USAIn C. elegans, removing the germ cells extends life span by triggering the nuclear localization and activation of the DAF-16/FOXO transcription factor in the intestine. In this study, we identify and analyze genes required for germline removal to extend life span.……Cell:一种长寿的关键调节因子被发现生物通报道:美国Salk生物研究所的研究人员发现一种由DAF-16介导的寿命延长途径的一种关键的调节因子SMK-1。这项研究的结果发表在3月10日的Cell杂志上。已经知道,胰岛素/IGF-1信号途径(IIS)通过一个研究较多、高度保守的和核心成分调节着线虫、果蝇和小鼠的衰老过程。IIS还调节着早期的发育方向、动物的生殖状态、先天免疫和压力抗性功能。在线虫中,单独的胰岛素/IGF-1受体DAF-2负向调节着FOXO转录因子DAF-16。在这项研究中,研究人员发现了IIS长寿途径的一个新的成员——SMK-1,它通过调节DAF-16活动的转录特异性,从而专一地影响依赖DAF-16的衰老过程的调节。生理和转录分析表明smk-1是先天免疫、UV和氧化压力所必须的,但不是DAF-16的热压力功能所需要的。由此可见,SMK-1通过调整DAF-16转录特异性而不影响其他由IIS调节的过程来在长寿中起作用的。 Cell, Vol 124, 943-955, 10 March 2006SMK-1, an Essential Regulator of DAF-16-Mediated LongevitySuzanne Wolff,1,2 Hui Ma,1,2 Denise Burch,1 Gustavo A. Maciel,1 Tony Hunter,1 and Andrew Dillin1, 1 Molecular and Cell Biology Laboratory, The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USAInsulin/IGF-1 signaling (IIS) regulates aging in worms, flies, and mice through a well-characterized, highly conserved core set of components. IIS also regulates early developmental decisions, the reproductive status of the animal, innate immunity, and stress-resistance functions………… < 1 > < 2 >
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