title: Altered expression of the Olr59, Ethe1, and Slc10a2 genes in the liver of F344 rats by neonatal thyroid hormone disruption.
abstract: Many concerns have been expressed regarding the possible adverse effects of thyroid hormone-disrupting chemicals in the environment. The disruption of thyroid hormones in the neonatal period may lead to permanent effects on thyroid hormone homeostasis as well as related developmental disorders, as thyroid hormones are essential for regulating the growth and differentiation of many tissues. To understand the long-term alteration in gene expressions by neonatal administration of thyroid hormone-like chemicals in general, we identified genes whose expression was altered in the liver, an important component of the thyroid hormone axis, by neonatal exposure to triiodothyronine (T3). T3 was administered to male F344 rats on postnatal days 1, 3, and 5 (week 0). At 8 weeks of age, cDNA microarray analysis was used to identify hepatic genes whose expression was altered by neonatal exposure to T3. Among the up-regulated genes that were identified, the expression of Olr59, Ethe1, and Slc10a2 increased specifically in rats neonatally exposed to T3. Interestingly, altered hepatic expression of these genes indeed increased when a hydroxylated polybrominated diphenyl ether (PBDE), OH-BDE42, which is capable of binding to the TR, was given neonatally. Our data demonstrated that neonatal exposure to thyroid hormones could affect the long-term expression of the genes, which could be useful markers for neonatal effects by thyroid hormone-disrupting chemicals. Copyright © 2017 John Wiley & Sons, Ltd.
authors.affiliation: Faculty of Pharmaceutical Sciences / Graduate School of Biomedical Sciences, Hiroshima University, Japan.
authors.forename: Kana
authors.initials: K
authors.lastname: Matsubara
authors.affiliation: Faculty of Pharmaceutical Sciences / Graduate School of Biomedical Sciences, Hiroshima University, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Nakamura
authors.affiliation: Faculty of Pharmaceutical Sciences / Graduate School of Biomedical Sciences, Hiroshima University, Japan.
authors.forename: Seigo
authors.initials: S
authors.lastname: Sanoh
authors.affiliation: Faculty of Pharmaceutical Sciences / Graduate School of Biomedical Sciences, Hiroshima University, Japan.
authors.forename: Shigeru
authors.initials: S
authors.lastname: Ohta
authors.affiliation: Faculty of Pharmacology, Nihon Pharmaceutical University, Japan.
authors.forename: Shigeyuki
authors.initials: S
authors.lastname: Kitamura
authors.affiliation: Faculty of Pharmacology, Nihon Pharmaceutical University, Japan.
authors.forename: Naoto
authors.initials: N
authors.lastname: Uramaru
authors.affiliation: Okazaki Institute for Integrative Bioscience, National Institute for Basic Biology, National Institutes of Natural Sciences, Japan.
authors.forename: Shinichi
authors.initials: S
authors.lastname: Miyagawa
authors.affiliation: Okazaki Institute for Integrative Bioscience, National Institute for Basic Biology, National Institutes of Natural Sciences, Japan.
authors.forename: Taisen
authors.initials: T
authors.lastname: Iguchi
authors.affiliation: Endocrine Research Group, Department of Disease Model, Research Institute for Radiation Biology and Medicine (RIRBM), Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima, 734-8553, Japan.
authors.forename: Nariaki
authors.identifier: 0000-0002-8570-4001
authors.initials: N
authors.lastname: Fujimoto
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D049308:Dioxygenases / Q000235:genetics / Q000378:metabolism*; D052244:Endocrine Disruptors / Q000633:toxicity; D005786:Gene Expression Regulation; D055768:Halogenated Diphenyl Ethers / Q000633:toxicity; D008099:Liver / Q000187:drug effects / Q000378:metabolism; D008297:Male; D024101:Mitochondrial Proteins / Q000235:genetics / Q000378:metabolism*; D029363:Organic Anion Transporters, Sodium-Dependent / Q000235:genetics / Q000378:metabolism*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D051381:Rats; D011916:Rats, Inbred F344; D018035:Receptors, Odorant / Q000235:genetics / Q000378:metabolism*; D027981:Symporters / Q000235:genetics / Q000378:metabolism*; D013961:Thyroid Gland / Q000187:drug effects / Q000378:metabolism; D014284:Triiodothyronine / Q000097:blood* / Q000494:pharmacology*
chemical_list: D052244:Endocrine Disruptors; D055768:Halogenated Diphenyl Ethers; D024101:Mitochondrial Proteins; D029363:Organic Anion Transporters, Sodium-Dependent; D012333:RNA, Messenger; D018035:Receptors, Odorant; D027981:Symporters; D014284:Triiodothyronine; C071908:sodium-bile acid cotransporter; D049308:Dioxygenases
keywords: endocrine disruptors; neonatal exposure; thyroid hormones, brominated flame retardant, hepatic gene expression