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Molecular Pharmacology

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Research ArticleArticle

The Teratogenic Sensitivity to 2,3,7,8-Tetrachlorodibenzo-p-dioxin Is Modified by a Locus on Mouse Chromosome 3

Tami L. Thomae, Emily A. Stevens, Adam L. Liss, Norman R. Drinkwater and Christopher A. Bradfield
Molecular Pharmacology March 2006, 69 (3) 770-775; DOI: https://doi.org/10.1124/mol.105.019760
Tami L. Thomae
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Emily A. Stevens
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Adam L. Liss
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Norman R. Drinkwater
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Christopher A. Bradfield
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Abstract

In an effort to understand how genetics can influence individual sensitivity to environmentally induced disease, we performed a linkage analysis to identify murine loci in addition to the Ahr locus that influence the incidence of cleft palate and hydronephrosis in developing mice exposed to the pollutant 2,3,7,8-tetrachlorodibenzo-p-dioxin (dioxin). Administration of 64 μg/kg dioxin to C57BL/6J (B6) dams at embryonic day 9 (E9) led to palatal clefting and hydronephrosis in nearly 100% of embryos by E17. In contrast, similar exposure of CBA/J (CBA) dams led to cleft palate in only 8% and hydronephrosis in 69% of embryos. To determine the genetic basis for this strain-dependent sensitivity, linkage analyses on the progeny of a B6CBAF1 intercross and a CBA×B6CBAF1 backcross were performed. The incidences of cleft palate and hydronephrosis were assessed and genomic DNA from embryos was analyzed at informative simple sequence length polymorphism (SSLP) markers. One locus segregating with dioxin-induced cleft palate was identified (p < 0.01) and designated as chemically mediated teratogenesis number 1 (Cmt1). The Cmt1 locus is located on chromosome 3.

  • Received October 10, 2005.
  • Accepted December 14, 2005.
  • The American Society for Pharmacology and Experimental Therapeutics
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Molecular Pharmacology: 69 (3)
Molecular Pharmacology
Vol. 69, Issue 3
1 Mar 2006
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Research ArticleArticle

The Teratogenic Sensitivity to 2,3,7,8-Tetrachlorodibenzo-p-dioxin Is Modified by a Locus on Mouse Chromosome 3

Tami L. Thomae, Emily A. Stevens, Adam L. Liss, Norman R. Drinkwater and Christopher A. Bradfield
Molecular Pharmacology March 1, 2006, 69 (3) 770-775; DOI: https://doi.org/10.1124/mol.105.019760

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Research ArticleArticle

The Teratogenic Sensitivity to 2,3,7,8-Tetrachlorodibenzo-p-dioxin Is Modified by a Locus on Mouse Chromosome 3

Tami L. Thomae, Emily A. Stevens, Adam L. Liss, Norman R. Drinkwater and Christopher A. Bradfield
Molecular Pharmacology March 1, 2006, 69 (3) 770-775; DOI: https://doi.org/10.1124/mol.105.019760
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