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Neonatal Maternal Separation Alters the Capacity of Adult Neural Precursor Cells to Differentiate into Neurons Via Methylation of Retinoic Acid Receptor Gene Promoter

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タイトル: Neonatal Maternal Separation Alters the Capacity of Adult Neural Precursor Cells to Differentiate into Neurons Via Methylation of Retinoic Acid Receptor Gene Promoter
著者: Boku, Shuken 著作を一覧する
Toda, Hiroyuki 著作を一覧する
Nakagawa, Shin 著作を一覧する
Kato, Akiko 著作を一覧する
Inoue, Takeshi 著作を一覧する
Koyama, Tsukasa 著作を一覧する
Hiroi, Noboru 著作を一覧する
Kusumi, Ichiro 著作を一覧する
キーワード: Adult neurogenesis
Dentate gyrus
DNA methylation
DNA methyltransferase
Maternal separation
Retinoic acid receptor
発行日: 2015年 2月15日
出版者: Elsevier
誌名: Biological psychiatry
巻: 77
号: 4
開始ページ: 335
終了ページ: 344
出版社 DOI: 10.1016/j.biopsych.2014.07.008
抄録: BACKGROUND: Early life stress is thought to contribute to psychiatric disorders, but the precise mechanisms underlying this link are poorly understood. As neonatal stress decreases adult hippocampal neurogenesis, which, in turn, functionally contributes to many behavioral phenotypes relevant to psychiatric disorders, we examined how in vivo neonatal maternal separation (NMS) impacts the capacity of adult hippocampal neural precursor cells via epigenetic alterations in vitro. METHODS: Rat pups were separated from their dams for 3 hours daily from postnatal day (PND) 2 to PND 14 or were never separated from the dam (as control animals). We isolated adult neural precursor cells from the hippocampal dentate gyrus at PND 56 and assessed rates of proliferation, apoptosis, and differentiation in cell culture. We also evaluated the effect of DNA methylation at the retinoic acid receptor (RAR) promoter stemming from NMS on adult neural precursor cells. RESULTS: NMS attenuated neural differentiation of adult neural precursor cells but had no detectible effect on proliferation, apoptosis, or astroglial differentiation. The DNA methyltransferase (DNMT) inhibitor, 5-aza-dC, reversed a reduction by NMS of neural differentiation of adult neural precursor cells. NMS increased DNMT1 expression and decreased expression of RAR alpha. An RAR alpha agonist increased neural differentiation and an antagonist reduced retinoic acid-induced neural differentiation. NMS increased the methylated portion of RAR alpha promoter, and the DNMT inhibitor reversed a reduction by NMS of RAR alpha messenger RNA expression. CONCLUSIONS: NMS attenuates the capacity of adult hippocampal neural precursor cells to differentiate into neurons by decreasing expression of RAR alpha through DNMT1-mediated methylation of its promoter.
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/58027
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 久住 一郎

 

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