Journal
MECHANISMS OF AGEING AND DEVELOPMENT
Volume 122, Issue 13, Pages 1477-1495Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/S0047-6374(01)00273-1
Keywords
heat shock; stress experiments; nematode worm; Caenorhabditis elegans
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Funding
- NIA NIH HHS [P01 AG08761-01] Funding Source: Medline
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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. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved.
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