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Surveying Low-Cost Methods to Measure Lifespan and Healthspan in Caenorhabditis elegans
Published on: May 18, 2022
HIF-1 modulates longevity and healthspan in a temperature-dependent manner
Scott F Leiser1, Anisoara Begun, Matt Kaeberlein
1Department of Pathology, University of Washington, Seattle, WA 98195, USA.
Aging Cell
|January 19, 2011
Summary
Hypoxia-inducible factor 1 (HIF-1) impacts aging in C. elegans. Stabilizing HIF-1 extends lifespan, while its deletion extends lifespan only at higher temperatures and requires DAF-16.
Area of Science:
- Genetics
- Molecular Biology
- Aging Research
Background:
- The role of hypoxia-inducible factor 1 (HIF-1) in aging is complex, with studies showing both positive and negative regulatory effects on lifespan.
- Discrepancies exist in understanding HIF-1's function in longevity across different experimental models.
Purpose of the Study:
- To clarify the role of HIF-1 in aging and resolve conflicting findings in Caenorhabditis elegans.
- To investigate the temperature-dependent effects of HIF-1 on lifespan and healthspan.
Main Methods:
- Utilized genetic manipulation (deletion and RNAi) to alter HIF-1 levels in C. elegans.
- Assessed lifespan and healthspan (vulval integrity) under various temperature conditions.
- Investigated the involvement of the DAF-16 transcription factor using genetic knockdown and nuclear localization analysis.
Main Results:
- Stabilization of HIF-1 consistently increased lifespan across all tested conditions.
- Deletion of hif-1 extended lifespan at 25°C but not at 15°C, with impaired healthspan (vulval integrity) at lower temperatures.
- HIF-1 deletion's lifespan extension was dependent on DAF-16, and its effects were modulated by censoring animals with vulval defects.
Conclusions:
- HIF-1 acts as a robust lifespan extender when stabilized, but its deletion's effect on longevity is temperature-dependent and linked to healthspan.
- DAF-16 is a crucial mediator of HIF-1's lifespan-extending function, irrespective of temperature or specific experimental conditions.
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