Effects of DDT on Mouse and Rat Liver Genes
Author Information
Author(s): Kiyosawa Naoki, Kwekel Joshua C, Burgoon Lyle D, Dere Edward, Williams Kurt J, Tashiro Colleen, Chittim Brock, Zacharewski Timothy R
Primary Institution: Michigan State University
Hypothesis
The study investigates the species-specific hepatic responses to o, p'-DDT in mice and rats.
Conclusion
The study found significant species differences in gene expression and responses to DDT between mice and rats, which complicates the extrapolation of results to humans.
Supporting Evidence
- DDT is a known rodent hepatic tumor promoter.
- The study identified significant differences in gene expression profiles between mice and rats.
- Mouse liver showed induction of genes related to steroid metabolism that were not observed in rats.
- The study suggests that PXR/CAR-mediated responses may play a significant role in hepatic tumor promotion.
Takeaway
This study looked at how a pesticide called DDT affects the livers of mice and rats differently, showing that what happens in one species might not happen in the other.
Methodology
The study involved gene expression analysis, histopathology, and tissue level analyses in immature, ovariectomized C57BL/6 mice treated with o, p'-DDT.
Limitations
The study's findings may not be directly applicable to humans due to significant species differences.
Participant Demographics
Immature, ovariectomized C57BL/6 mice and Sprague-Dawley rats.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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