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Shortened lifespan of nematode Caenorhabditis elegans after prolonged exposure to heavy metals and detergents.

Authors :
Harada, Hiroaki
Kurauchi, Masaru
Hayashi, Rie
Eki, Toshihiko
Source :
Ecotoxicology & Environmental Safety; Mar2007, Vol. 66 Issue 3, p378-383, 6p
Publication Year :
2007

Abstract

Abstract: The acute toxicities of heavy metals and detergents have been well examined with respect to several endpoints, such as mortality, for application to toxicity tests for environmental assessments. However, chronic influences of these agents on multicellular organisms still need to be determined. Here we studied long-term effects on the lifespan of a free-living nematode, Caenorhabditis elegans, resulting from prolonged exposure to heavy metals or detergents, as well as short-term inhibitory effects on reproduction and growth. These agents inhibited growth of hatched larvae and reproductive capacity in a concentration-dependent manner. They also effectively shortened the lifespan of the adult nematode over the same concentration range. Since toxic effects on both growth and lifespan were observed over similar concentration ranges, where acute toxicities in various endpoints are detected, the shortening of the lifespan can be used as a new endpoint for the assessment of various ecotoxic agents. [Copyright &y& Elsevier]

Details

Language :
English
ISSN :
01476513
Volume :
66
Issue :
3
Database :
Supplemental Index
Journal :
Ecotoxicology & Environmental Safety
Publication Type :
Academic Journal
Accession number :
23956559
Full Text :
https://doi.org/10.1016/j.ecoenv.2006.02.017