Two SET domain containing genes link epigenetic changes and aging in Caenorhabditis elegans.
Two SET domain containing genes link epigenetic changes and aging in Caenorhabditis elegans.
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DOI:
10.1111/j.1474-9726.2011.00785.x
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发表时间:
2012-04
期刊:
影响因子:
7.8
通讯作者:
Lee SS
中科院分区:
文献类型:
--
作者:
Ni Z;Ebata A;Alipanahiramandi E;Lee SS
Changes of epigenetic status and chromatin structure have been shown to associate with aging in many organisms. Here, we report an RNAi screen of putative histone methyltransferases and demethylases in wild type C. elegans using reproduction inhibitor. We identified six genes that, when inactivated by RNAi, consistently extend lifespan. Five of these genes do not require germline proliferation to affect lifespan. We further characterized two of these genes, the highly homologous SET-domain containing genes, set-9 and set-26. They share redundant functions in maintaining normal lifespan, while exhibiting differential tissue expression patterns. Furthermore, we found that set-9 and set-26 partially act through the FOXO transcription factor, DAF-16, to modulate lifespan. Interestingly, inactivation of somatic SET-26 alone results in a robust lifespan extension, and alters the levels of histone H3 protein and the repressive histone marks, H3K9me3 and H3K27me3, in an age-dependent manner. We hypothesize that inactivation of SET-26 triggers compensation mechanisms to restore repressive chromatin structure, and hence affects chromatin stability to promote longevity.
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影响因子:
64.8
作者:
通讯作者:
--
影响因子:
4.5
作者:
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通讯作者:
Kelly WG
DOI:
10.1073/pnas.0707292104
发表时间:
2007-11-20
影响因子:
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作者:
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通讯作者:
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影响因子:
10.5
作者:
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通讯作者:
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通讯作者:
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