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- W2021129053 abstract "Background: The use of experimental model systems has expedited the elucidation of pathogenetic mechanisms of renal developmental disease in humans and the identification of genes that orchestrate developmental programming during nephrogenesis.Objectives: We conducted studies to evaluate the role of AHR polymorphisms in the disruption of renal developmental programming by benzo(a)pyrene (BaP).Methods: We used metanephric cultures of C57BL/6J (C57) mice expressing the Ahrb-1 allele and B6.D2N-Ahrd/J (D2N) mice expressing a mutant allele deficient in ligand binding (Ahrd) to investigate molecular mechanisms of renal development. Deficits in fetal programming were evaluated in the offspring of pregnant mice treated with BaP during nephrogenesis.Results: Hydrocarbon challenge of metanephri from C57 mice altered Wilms’ tumor suppressor gene (Wt1) mRNA splice variant ratios and reduced mRNAs of the Wt1 transcriptional targets syndecan-1 (Sdc1) paired box gene 2 (Pax2), epidermal growth factor receptor (Egfr), and retinoic acid receptor, alpha (Rarα). These changes correlated with down-regulation of effectors of differentiation [secreted frizzled-related sequence protein 1 (Sfrp1), insulin-like growth factor 1 receptor (Igf1r), wingless-related MMTV-integration site 4 (Wnt4), Lim homeobox protein 1 (Lhx1), E-cadherin]. In contrast, metanephri from D2N mice were spared hydrocarbon-induced changes in Wt1 splice variant ratios and deficits of differentiation. We observed similar patterns of dysmorphogenesis and progressive loss of renal function at postnatal weeks 7 and 52 in the offspring of pregnant C57 but not D2N mice gavaged with 0.1 or 0.5 mg/kg BaP on gestation days 10–13.Conclusions: These findings support a functional link between AHR and WT1 in the regulation of renal morphogenesis and raise important questions about the contribution of human AHR polymorphisms to the fetal origins of adult-onset kidney disease." @default.
- W2021129053 created "2016-06-24" @default.
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- W2021129053 date "2011-12-01" @default.
- W2021129053 modified "2023-09-26" @default.
- W2021129053 title "A Mutant <i>Ahr</i> Allele Protects the Embryonic Kidney from Hydrocarbon-Induced Deficits in Fetal Programming" @default.
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- W2021129053 doi "https://doi.org/10.1289/ehp.1103692" @default.
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