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Cholesterol regulates DAF-16 nuclear localization and fasting-induced longevity in C. elegans
Akiko Ihara1, Masaharu Uno1, Koichi Miyatake1
1Department of Cell and Developmental Biology, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
Experimental Gerontology
|December 20, 2016
Summary
Cholesterol is essential for the longevity effects of intermittent fasting. Depriving organisms of cholesterol blocks lifespan extension and the activation of key longevity genes, highlighting cholesterol's role in aging.
Area of Science:
- Gerontology
- Molecular Biology
- Metabolic Regulation
Background:
- Cholesterol is implicated in age-related diseases and mortality.
- Dietary restriction, including intermittent fasting, extends lifespan.
- The link between cholesterol and dietary restriction-induced longevity is unclear.
Purpose of the Study:
- To investigate cholesterol's role in longevity induced by intermittent fasting.
- To determine if cholesterol influences the insulin/IGF-1 signaling pathway in fasting.
Main Methods:
- Intermittent fasting was applied to model organisms.
- Cholesterol levels were manipulated (deprivation, knockdown).
- Gene expression (DAF-16) and protein localization were analyzed.
Main Results:
- Cholesterol deprivation suppressed fasting-induced longevity.
- Cholesterol is required for fasting-induced upregulation of DAF-16.
- Cholesterol is crucial for the nuclear accumulation of DAF-16.
- Knockdown of cholesterol-binding protein NSBP-1 mimicked cholesterol deprivation effects.
Conclusions:
- Cholesterol is a key mediator of longevity induced by intermittent fasting.
- Cholesterol regulates the activity and localization of DAF-16, a crucial longevity factor.
- NSBP-1 acts as a cholesterol-dependent regulator in this pathway.
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