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Hwang JH, Park JY, Park HJ, Bak SM, Hirano M, Iwata H, Park YS, Kim EY. Ecological factors drive natural selection pressure of avian aryl hydrocarbon receptor 1 genotypes. Sci Rep 2016; 6:27526. [PMID: 27283192 PMCID: PMC4901312 DOI: 10.1038/srep27526] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 05/20/2016] [Indexed: 01/26/2023] Open
Abstract
The aryl hydrocarbon receptor (AHR) mediates dioxin toxicities. Several studies have suggested that two amino acid residues corresponding to the 324th and 380th positions in the ligand binding domain (LBD) of the chicken AHR1 (Ile_Ser as high sensitivity, Ile_Ala as moderate sensitivity, and Val_Ala as low sensitivity), could be an important factor determining dioxin sensitivity in avian species. Here, we analyzed the association between ecological factors and AHR1 LBD genotypes of 113 avian species. Cluster analyses showed that 2 major clusters and sub-clusters of the cluster 3 were associated with specific AHR1 genotypes depending on the food, habitat, and migration of the animal. The majority of the species with Ile_Ala type were the Passeriformes, which are omnivorous or herbivorous feeders in the terrestrial environment. The species with Val_Ala type was primarily composed of raptors and waterbirds, which have been exposed to naturally occurring dioxins. An in vitro reporter gene assay revealed that the sensitivity to a natural dioxin, 1,3,7-tribromodibenzo-p-dioxin was in the order of Ile_Ser > Ile_Ala > Val_Ala. These results suggest that ecological factors related to the exposure of natural dioxins contribute to natural selection of the avian AHR1 genotype, which consequently leads to different sensitivity to man-made dioxins.
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Affiliation(s)
- Ji-Hee Hwang
- Department of Life and Nanopharmaceutical Science and Department of Biology, Kyung Hee University, Hoegi-Dong, Dongdaemun-Gu, Seoul 130-701, Korea
| | - Jin-Young Park
- Nature Conservation Research Division, National Institute of Environmental Research, Hwangyoungro 42, Seo-Gu, Incheon 404-708, Korea
| | - Hae-Jeong Park
- Department of Life and Nanopharmaceutical Science and Department of Biology, Kyung Hee University, Hoegi-Dong, Dongdaemun-Gu, Seoul 130-701, Korea
| | - Su-Min Bak
- Department of Life and Nanopharmaceutical Science and Department of Biology, Kyung Hee University, Hoegi-Dong, Dongdaemun-Gu, Seoul 130-701, Korea
| | - Masashi Hirano
- Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama, 790-8577, Japan
| | - Hisato Iwata
- Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama, 790-8577, Japan
| | - Young-Suk Park
- Department of Life and Nanopharmaceutical Science and Department of Biology, Kyung Hee University, Hoegi-Dong, Dongdaemun-Gu, Seoul 130-701, Korea
| | - Eun-Young Kim
- Department of Life and Nanopharmaceutical Science and Department of Biology, Kyung Hee University, Hoegi-Dong, Dongdaemun-Gu, Seoul 130-701, Korea
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Hassoun EA, Stohs SJ. TCDD, endrin and lindane induced oxidative stress in fetal and placental tissues of C57BL/6J and DBA/2J mice. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART C, PHARMACOLOGY, TOXICOLOGY & ENDOCRINOLOGY 1996; 115:11-8. [PMID: 8983165 DOI: 10.1016/s0742-8413(96)00116-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The abilities of TCDD, endrin and lindane to induce oxidative stress in fetal and placental tissues have been studied after the oral administration of these xenobiotics to pregnant C57BL/6J and DBA/2J mice. Production of superoxide anion, lipid peroxidation and DNA-single strand breaks (SSB) was determined in live fetal and placental tissues 48 hr after administration of single teratogenic doses of the compounds on day 12 of gestation. Oxidative stress and its biomarkers were also determined in livers of day 18 fetuses after administration on day 12 of gestation. TCDD given at doses of 30 and 60 micrograms/kg body weight to the C57BL/6J and DBA/2J mice, respectively, produced increases of 1.3-2.7-fold in superoxide anion production, 1.6-1.9-fold in lipid peroxidation and 2.1-4.4-fold in DNA-SSB. Endrin, given at a dose of 4.5 mg/kg body weight to C57BL/6J and DBA/2J mice, produced increases of 1.3-2.8-fold in superoxide production, 1.4-1.8-fold in lipid peroxidation and 1.4-4.7-fold in DNA-SSB. Lindane when given at a dose of 30 mg/kg body weight to C57BL/6J and DBA/2J mice produced increases of 1.6-3.0-fold in superoxide production, 1.3-2.1-fold in lipid peroxidation and 1.4-5.0-fold in DNA-SSB. The results suggest that superoxide production, lipid peroxidation and DNA-SSB in fetal and placental tissues may participate in the fetotoxic effects of TCDD and other polyhalogenated cyclic hydrocarbons, and that TCDD-induced oxidative damage in fetal and placental tissues is mediated at least in part by the Ah-receptor. The results also indicate that TCDD as an inducer of oxidative tissue damage in the embryos and placentas is approximately 150 and 1000 times more potent than endrin and lindane, respectively, in C57BL/6J mice, and 75 and 500 times more potent than endrin and lindane, respectively, in the DBA/2J mouse strain.
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Affiliation(s)
- E A Hassoun
- College of Pharmacy, University of Toledo, OH 43606, USA
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