Journal article

Publication year: 2021

Pages: 33-49

Journal: Reproductive Toxicology

Volume number: 101

ISSN: 0890-6238

eISSN: 1873-1708

Open access status: Hybrid

DOI Link: https://doi.org/10.1016/j.reprotox.2021.02.004

Publisher: Elsevier

Abstract: 
Young adult wild-type and aryl hydrocarbon receptor knockout (AHRKO) mice of both sexes and the C57BL/6J background were exposed to 10 weekly oral doses of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD; total dose of 200 ?g/kg bw) to further characterize the observed impacts of AHR as well as TCDD on the retinoid system. Unexposed AHRKO mice harboured heavier kidneys, lighter livers and lower serum all-trans retinoic acid (ATRA) and retinol (REOH) concentrations than wild-type mice. Results from the present study also point to a role for the murine AHR in the control of circulating REOH and ATRA concentrations. In wild-type mice, TCDD elevated liver weight and reduced thymus weight, and drastically reduced the hepatic concentrations of 9-cis-4-oxo-13,14dihydro-retinoic acid (CORA) and retinyl palmitate (REPA). In female wild-type mice, TCDD increased the hepatic concentration of ATRA as well as the renal and circulating REOH concentrations. Renal CORA concentrations were substantially diminished in wild-type male mice exclusively following TCDD-exposure, with a similar tendency in serum. In contrast, TCDD did not affect any of these toxicity or retinoid system parameters in AHRKO mice. Finally, a distinct sex difference occurred in kidney concentrations of all the analysed retinoid forms. Together, these results strengthen the evidence of a mandatory role of AHR in TCDD-induced retinoid disruption, and suggest that the previously reported accumulation of several retinoid forms in the liver of AHRKO mice is a line-specific phenomenon. Our data further support participation of AHR in the control of liver and kidney development in mice.

Harvard Citation style: Esteban, J., Sanchez-Perez, I., Hamscher, G., Miettinen, H., Korkalainen, M., Viluksela, M., et al. (2021) Role of aryl hydrocarbon receptor (AHR) in overall retinoid metabolism: Response comparisons to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) exposure between wild-type and AHR knockout mice, Reproductive Toxicology, 101, pp. 33-49. https://doi.org/10.1016/j.reprotox.2021.02.004

APA Citation style: Esteban, J., Sanchez-Perez, I., Hamscher, G., Miettinen, H., Korkalainen, M., Viluksela, M., Pohjanvirta, R., & Hakansson, H. (2021). Role of aryl hydrocarbon receptor (AHR) in overall retinoid metabolism: Response comparisons to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) exposure between wild-type and AHR knockout mice. Reproductive Toxicology. 101, 33-49. https://doi.org/10.1016/j.reprotox.2021.02.004