New genes that extend Caenorhabditis elegans' lifespan in response to reproductive signals.

New genes that extend Caenorhabditis elegans' lifespan in response to reproductive signals.
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DOI:
10.1111/j.1474-9726.2011.00768.x
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发表时间:
2012-04
期刊:
影响因子:
7.8
通讯作者:
Kenyon C
Kenyon C
中科院分区:
生物学1区
文献类型:
--
作者:
McCormick M;Chen K;Ramaswamy P;Kenyon C

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In C. elegans和Drosophila,去除生殖系干细胞可以延长寿命。In C.在线虫中,这种寿命的延长需要FOXO转录因子α-16和核激素受体α-12。为了更好地了解β-16和β-12之间的调控关系,我们使用微阵列分析来识别下游基因。我们发现,这两个转录因子的影响表达的不同,但重叠的基因组在生殖细胞的损失。此外,我们还发现了几个新的基因,这些基因是生殖细胞减少以增加寿命所必需的。一个是phi-62,编码一个保守的预测RNA结合蛋白。PHI-62可能通过与TCER-1(一种假定的转录延伸因子)和FTT-2(一种已知与TCER-16结合的14-3-3蛋白)合作影响TCER-16依赖性转录。其他三个基因编码参与脂质代谢的蛋白质;一个是三酰甘油脂肪酶,另一个是酰基CoA还原酶。这些基因不会明显影响大量脂肪储存水平;因此,我们提出了一个模型,在这个模型中,它们可能会影响延长寿命的信号或代谢产物的产生。
In C. elegans and Drosophila, removing germline stem cells increases lifespan. In C. elegans, this lifespan extension requires DAF-16, a FOXO transcription factor and DAF-12, a nuclear hormone receptor. To better understand the regulatory relationships between DAF-16 and DAF-12, we used microarray analysis to identify downstream genes. We found that these two transcription factors influence the expression of distinct but overlapping sets of genes in response to loss of the germline. In addition, we identified several new genes that are required for loss of the germline to increase lifespan. One, phi-62, encodes a conserved, predicted RNA binding protein. PHI-62 influences DAF-16-dependent transcription, possibly by collaborating with TCER-1, a putative transcription-elongation factor, and FTT-2, a 14-3-3 protein known to bind DAF-16. Three other genes encode proteins involved in lipid metabolism; one is a triacylglycerol lipase, and another is an acyl CoA reductase. These genes do not noticeably affect bulk fat storage levels; therefore, we propose a model in which they may influence production of a lifespan-extending signal or metabolite.
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