HSF-1 regulators DDL-1/2 link insulin-like signaling to heat-shock responses and modulation of longevity.
HSF-1 regulators DDL-1/2 link insulin-like signaling to heat-shock responses and modulation of longevity.
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DOI:
10.1016/j.cell.2011.12.019
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发表时间:
2012-01-20
期刊:
影响因子:
64.5
通讯作者:
Hsu AL
中科院分区:
文献类型:
--
作者:
Chiang WC;Ching TT;Lee HC;Mousigian C;Hsu AL
Extended longevity is often correlated with increased resistance against various stressors. Insulin/IGF-1-like signaling (IIS) is known to have a conserved role in aging and cellular mechanisms against stress. In C. elegans, genetic studies suggest that heat-shock transcription factor HSF-1 is required for IIS to modulate longevity. Here we report that the activity of HSF-1 is regulated by IIS. This regulation might occur at an early step of HSF-1 activation via two HSF-1 regulators, DDL-1 and DDL-2. Inhibition of DDL-1/2 increases longevity and thermotolerance in an hsf-1 dependent manner. Furthermore, biochemical analyses suggest that DDL-1/2 negatively regulates HSF-1 activity by forming a protein complex with HSF-1. The formation of this complex (DHIC) is affected by the phosphorylation status of DDL-1. Both the formation of DHIC and the phosphorylation of DDL-1 are controlled by IIS. Therefore, DDL-1/2 may serve as the link between IIS and HSF-1 pathway.
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DOI:
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