Heating stress patterns in Caenorhabditis elegans longevity and survivorship.
Survival data from Caenorhabditis elegans strain TJ1060 (spe-9; fer-15) following brief exposure to 35 degrees C have been investigated. Three experiments with 3-day-old worms were conducted with heat duration ranging between 0 and 12 hours. A statistically significant increase in life expectancy was observed in the groups heated for less than 2 hours, as compared to the unheated control groups. In different experiments P-values for the observed life spans under the hypothesis that heating has no influence on longevity were P < 0.004 after 0.5 hour heat, P < 0.012 after 1 hour heat and P < 0.055 after 2 hours of heating. A biphasic survival model with Gamma distributed frailty has been constructed to describe the survival of worms after heating. The increase in the remaining life expectancy is determined by more effective protection by heat-induced substances in the ages yanger than 27 days. The unheated control group demonstrated acquired heterogeneity of frailty with chronological age while the heat-induced substances defend the worms in a universal way and protect against the development of frailty.
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Related Subject Headings
- Time Factors
- Stress, Physiological
- Longevity
- Life Expectancy
- Heating
- Heat-Shock Response
- Gerontology
- Energy Metabolism
- Caenorhabditis elegans
- Animals
Citation
Published In
DOI
EISSN
ISSN
Publication Date
Volume
Issue
Start / End Page
Related Subject Headings
- Time Factors
- Stress, Physiological
- Longevity
- Life Expectancy
- Heating
- Heat-Shock Response
- Gerontology
- Energy Metabolism
- Caenorhabditis elegans
- Animals