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Mutagenesis vol. 19 no. 2 pp. 85-90, March 2004
© 2004 UK Environmental Mutagen Society/Oxford University Press

Evaluation of in vivo genotoxicity of cypermethrin in Drosophila melanogaster using the alkaline Comet assay

Indranil Mukhopadhyay1, D.Kar Chowdhuri1, Mahima Bajpayee2 and Alok Dhawan2,3

1Embryotoxicology Section and 2Developmental Toxicology Section, Industrial Toxicology Research Centre, PO Box 80, M.G. Marg, Lucknow, 226 001 Uttar Pradesh, India

The single cell gel electrophoresis (SCGE) assay, also known as the Comet assay, is one of the most promising genotoxicity tests developed in recent years to measure and analyse DNA damage in single cells. The present study was undertaken to assess the in vivo genotoxicity of the synthetic pyrethroid cypermethrin in brain ganglia and anterior mid gut of Drosophila melanogaster. Freshly emerged first instar larvae (22 ± 2 h) were placed in different concentrations of cypermethrin (0.0004, 0.0008, 0.002, 0.2 and 0.5 p.p.m.) mixed in standard Drosophila food and allowed to grow. At 96 ± 2 h, brain ganglia and anterior midgut from control and treated larvae were dissected out, single cell suspensions were prepared and a Comet assay was performed. Our results revealed a significant dose-dependent increase in DNA damage in the cells of brain ganglia and anterior midgut of D.melanogaster exposed to cypermethrin as compared with controls (P < 0.05 at 0.002 p.p.m.; P < 0.001 at 0.2 and 0.5 p.p.m.). The present study shows in vivo genotoxicity of cypermethrin even at very low concentrations, which proves D.melanogaster as a model for in vivo genotoxicity assessment using the Comet assay.

3To whom correspondence should be addressed. Tel: +91 522 2213618; Fax: +91 522 2228227; Email: dhawanalok{at}hotmail.com

Received on January 18, 2003; accepted on November 17, 2003


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H. R. Siddique, D.K. Chowdhuri, D.K. Saxena, and A. Dhawan
Validation of Drosophila melanogaster as an in vivo model for genotoxicity assessment using modified alkaline Comet assay
Mutagenesis, July 1, 2005; 20(4): 285 - 290.
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