Ageing and survival after different doses of heat shock: the results of analysis of data from stress experiments with the nematode worm Caenorhabditis elegans.

Authors: Yashin AI; Cypser JR; Johnson TE; Michalski AI; Boyko SI; Novoseltsev VN

Abstract: Stress experiments performed on a population of sterilised nematode worms (Caenorhabditis elegans) show a clear hormesis effect after short exposure and clear debilitation effects after long exposure to heat shock. An intermediate duration of exposure results in a mixture of these two effects. In this latter case the survival curves for populations in the stress and control groups intersect. In this paper we develop an adaptation model of stress and apply it to the analysis of survival data from three such stress experiments. We show that the model can be used to explain empirical age-patterns of mortality and survival observed in these experiments. We discuss possible biological mechanisms involved in stress response and directions for further research.

Keywords: Adaptation, Physiological; Aging/*physiology; Animals; Caenorhabditis elegans/physiology; Heat-Shock Response/*physiology; *Likelihood Functions; *Models, Biological; Stress, Physiological

Journal: Mechanisms of ageing and development Volume: 122 Issue: 13 Pages: 1477-95 Date: July 27, 2001 PMID: 11470134

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Citation:

Yashin AI, Cypser JR, Johnson TE, Michalski AI, Boyko SI, Novoseltsev VN (2001) Ageing and survival after different doses of heat shock: the results of analysis of data from stress experiments with the nematode worm Caenorhabditis elegans. Mechanisms of ageing and development 122: 1477-95.

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