The dioxin TCDD protects against aflatoxin-induced mutation in female rats, but not in male rats

Mutation Research
A S ThorntonJ G de Boer

Abstract

2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is an environmental contaminant and a potent carcinogen in laboratory rodents. When combined with other environmental toxins, it has been shown to increase the (geno)toxicity of some compounds. In this study, the effect of TCDD on the mutagenicity of aflatoxin-B1 (AFB1) was examined in the rat liver using a lacI transgenic rodent mutation assay. AFB1 induces GC-->TA transversions. Since TCDD is known to have a differential effect in male and female rodents, both sexes were studied. The data showed that a 6-week pre-exposure to TCDD had no significant effect on the frequency of aflatoxin-induced mutation in the liver of male rats. However, the TCDD treatment completely prevented the aflatoxin-induced transversion mutations in female animals.

References

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Jun 19, 2001·Mutation Research·A S ThorntonJ G de Boer
Aug 16, 2003·Toxicology Letters·Luis F Oropeza-HernándezArnulfo Albores

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Citations

Jan 12, 2007·International Journal of Dermatology·George W M Millington, Nick J Levell
Apr 11, 2013·International Urology and Nephrology·Vahideh YavariMaryam Pakfetrat
Feb 9, 2017·Genes and Environment : the Official Journal of the Japanese Environmental Mutagen Society·Takehiko NohmiNaomi Toyoda-Hokaiwado

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