The Journal of Toxicological Sciences
Online ISSN : 1880-3989
Print ISSN : 0388-1350
ISSN-L : 0388-1350
Toxicogenomics/proteomics Report
Estrogenic effects of o,p’-DDT exposure in Japanese medaka (Oryzias latipes)
Masaya UchidaHiroshi NakamuraYoshihiro KagamiTeruhiko KusanoKoji Arizono
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2010 Volume 35 Issue 4 Pages 605-608


The persistent pesticide 1,1,1-trichloro-2-(2-chlorophenyl)-2-(4-chlorophenyl)ethane (o,p’-DDT) has been implicated as an endocrine-disrupting chemical. In this study, we performed DNA microarray analysis to assess hepatic gene expression in male Japanese medaka (Oryzias latipes) exposed to 1 ppb and 100 ppb o,p’-DDT for 48 hr. Results showed that 1 ppb o,p’-DDT induced the expression of choriogenins (chgH, chgL, and chgH minor), and 100 ppb induced the expression of vitellogenins (vtgI and vtgII) and estrogen receptor alpha. These genes showed considerably high up-regulation among the genes assayed and showed good dose-dependency. Thus, in this study the female hormone-like endocrine-disrupting effect of o,p’-DDT at gene expression level was clearly observed in Japanese medaka.

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© 2010 The Japanese Society of Toxicology
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