2013 Fiscal Year Annual Research Report
環境化学物質の慢性・晩発性中枢神経毒性メカニズムにおける神経新生の役割
Project/Area Number |
23659326
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Research Institution | Nagoya University |
Principal Investigator |
市原 学 名古屋大学, 医学(系)研究科(研究院), 准教授 (90252238)
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Keywords | ブロモプロパン / ニューロン新生 |
Research Abstract |
48匹のF344雄ラットを日本クレアから購入し、1週間馴化の後、名古屋大学医学部動物実験施設に設置された小動物用有機溶剤曝露装置を用いて、1-ブロモプロパン0、200、400、800ppmに一日8時間、週5日、4週間吸入曝露した。曝露終了時に麻酔下で頭蓋骨と第一頸椎の間に注射針を挿入し、脳脊髄液を採取した。すみやかに脳を剖出し、脈絡叢を採取するとともに、大脳皮質、海馬、小脳、中脳に切り分け、急速凍結保存を行った。Transthyretinの免疫組織染色を行うとともに、ELISAを用いて血漿中、脳脊髄液中の遊離triiodothyronine, thyroxineを測定した。その結果、血漿中遊離triiodothyronineは変化せず、thyroxineが減少した。甲状腺ホルモンはニューロン新生を促進することが知られており、本研究結果は1-ブロモプロパンによるニューロン新生減少に甲状腺ホルモンが関与している可能性を示した。また、我々のこれまでの研究で、1-ブロモプロパンがノルアドレナリン神経線維を減少させることが分かっているが、ノルアドレナリン神経線維に甲状腺が集まってくるとの研究報告もあり、1-ブロモプロパンによるノルアドレナリン神経線維変性作用において甲状腺ホルモンが重要な役割を果たしている可能性も示唆された。一方Transthyretinは、脳内甲状腺ホルモン輸送に貢献するとともに、甲状腺ホルモン減少が脱髄を促進することがわかっていることから、1-ブロモプロパンによるヒト脳MRI上での脱髄様所見を説明する可能性が考えられたが、少なくとも免疫組織的なレベルでは曝露による顕著な変化が見いだせなかった。今後、定量的な方法を用いて同蛋白の動態を調べる必要がある。
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Research Products
(51 results)
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[Journal Article] Expression of proteins associated with adipocyte lipolysis was significantly changed in the adipose tissues of the obese spontaneously hypertensive/NDmcr-cp rat.2014
Author(s)
Chang J, Oikawa S, Iwahashi H, Kitagawa E, Takeuchi I, Yuda M, Aoki C, Yamada Y, Ichihara G, Kato M, Ichihara S.
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Journal Title
Diabetol Metab Syndr
Volume: 6
Pages: 8
DOI
Peer Reviewed
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[Journal Article] Copper oxide nanoparticles reduce vasculogenesis in transgenic zebrafish through down-regulation of VEGF expression and induction of apoptosis2014
Author(s)
J Chang, G Ichihara, Y Shimada, S Tada-Oikawa, J Kuroyanagi, B Zhang, Y Suzuki, R Sehsah, M Kato, T Kuroyanagi, B Zhang, Y Suzuki, R Sehsah, M Kato, T Tanaka, S Ichihara
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Journal Title
Journal of Nanoscience and Nanotechnology
Volume: in press
Pages: in press
Peer Reviewed
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[Journal Article] Comparison of Barium and Arsenic Concentrations in Well Drinking Water and in Human Body Samples and a Novel Remediation System for These Elements in Well Drinking Water.2013
Author(s)
Kato M, Kumasaka MY, Ohnuma S, Furuta A, Kato Y, Shekhar HU, Kojima M, Koike Y, Dinh Thang N, Ohgami N, Ly TB, Jia X, Yetti H, Naito H, Ichihara G, Yajima I.
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Journal Title
PLoS One
Volume: -
Pages: -
Peer Reviewed
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[Journal Article] Identification of a glutamic acid repeat polymorphism of ALMS1 as a novel genetic risk marker for early-onset myocardial infarction by genome-wide linkage analysis.2013
Author(s)
Ichihara S, Yamamoto K, Asano H, Nakatochi M, Sukegawa M, Ichihara G, Izawa H, Hirashiki A, Takatsu F, Umeda H, Iwase M, Inagaki H, Hirayama H, Sone T, Nishigaki K, Minatoguchi S, Cho MC, Jang Y, Kim HS, Yokota M. 他10名
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Journal Title
Circ Cardiovasc Genet
Volume: 6
Pages: 569-578
DOI
Peer Reviewed
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[Journal Article] Dispersion method for safety research on manufactured nanomaterials.2013
Author(s)
Wu W, Ichihara G, Suzuki Y, Izuoka K, Oikawa-Tada S, Chang J, Sakai K, Miyazawa K, Porter D, Castranova V, Kawaguchi M, Ichihara S.
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Journal Title
Ind Health
Volume: 52
Pages: 54-65
Peer Reviewed
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[Presentation] Effects of Exposure to 1-Bromopropane on the Level of Thyroid Hormone in Cerebrospinal Fluid of Rats2014
Author(s)
L. Zhang, C. Zong1, N. Koibuchi, S. Ichihara, H. Fujita, J. Chang, J. Huang, H. Naito, M. Kato, G. Ichihara
Organizer
The 53rd Annual Meeting of the Society of Toxicology
Place of Presentation
Phoenix Convention Center, AZ, USA
Year and Date
20140324-27
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[Presentation] The Effects of Pharyngeal Aspiration-Exposure to Zinc Oxide Nanoparticles on Pulmonary Fibrosis Induced Bleomycin in Miceby2014
Author(s)
W. Wu, G. Ichihara, S. Tada-Oikawa, Y. Suzuki, J. Chang,N. Hashimoto, Y. Hasegawa, D. W. Porter, V. Castranova, C. Gabazza, E. Gabazza, S. Ichihara
Organizer
The 53rd Annual Meeting of the Society of Toxicology
Place of Presentation
Phoenix Convention Center, AZ, USA
Year and Date
20140324-20140327
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[Presentation] The Effects of Metal Oxide Nanoparticles on Angiogenesis in Transgenic Zebrafish2014
Author(s)
J. Chang, G. Ichihara, Y. Shimada, S. Tada-Oikawa, Y. Suzuki, R. Sehsah, M. Kato, T. Tanaka, S. Ichihara
Organizer
The 53rd Annual Meeting of the Society of Toxicology
Place of Presentation
Phoenix Convention Center, AZ, USA
Year and Date
20140324-20140327
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[Presentation] NanOEHS Overview2013
Author(s)
Gaku Ichihara, Yoshinori Hasegawa
Organizer
The 6th International Symposium on Nanotechnology, Occupational and Environmental Health; NanOEH6(第6回国際ナノテクノロジー労働環境衛生シンポジウム)
Place of Presentation
名古屋国際会議場、名古屋市
Year and Date
20131028-20131031
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[Presentation] Effects on Respiratory and Cardiovascular Systems in Workers Handling Titanium Dioxide Particles2013
Author(s)
Sahoko Ichihara, Weihua Li, Seiichi Omura, Yuji Fujitani, Ying Liu, Qiangyi Wang, Yusuke Hiraku, Naomi Hisanaga, Xuncheng Ding, Takahiro Kobayashi, Gaku Ichihara
Organizer
The 6th International Symposium on Nanotechnology, Occupational and Environmental Health; NanOEH6(第6回国際ナノテクノロジー労働環境衛生シンポジウム)
Place of Presentation
名古屋国際会議場、名古屋市
Year and Date
20131028-20131031
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[Presentation] Dispersion method for safety research on manufactured nanomaterials2013
Author(s)
Wenting Wu, Gaku Ichihara, Yuka Suzuki, Kiyora Izuoka, Saeko Oikawa-Tada, Jie Chang, Kiyoshi Sakai, Kun’ichi Miyazawa, Dale Porter, Vincent Castranova, Masami Kawaguchi , Sahoko Ichihara
Organizer
The 6th International Symposium on Nanotechnology, Occupational and Environmental Health; NanOEH6(第6回国際ナノテクノロジー労働環境衛生シンポジウム)
Place of Presentation
名古屋国際会議場、名古屋市
Year and Date
20131028-20131031
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[Presentation] The effects of exposure to zinc oxide nanoparticles on bleomycin-induced pulmonary fibrosis in mice2013
Author(s)
Wenting Wu, Gaku Ichihara, Saeko Tada-Oikawa, Yuka Suzuki, Jie Chang, Naozumi Hashimoto, Yoshinori Hasegawa, Corina Gabazza, Esteban Gabazza, Sahoko Ichihara
Organizer
The 6th International Symposium on Nanotechnology, Occupational and Environmental Health; NanOEH6(第6回国際ナノテクノロジー労働環境衛生シンポジウム)
Place of Presentation
名古屋国際会議場、名古屋市
Year and Date
20131028-20131031
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[Presentation] Involvement of Nrf-2 in ZnO NP-induced pulmonary inflammation2013
Author(s)
Radwa Ibrahim Sehsah, Wenting Wu, Sahoko Ichihara, Naozumi Hashimoto, Yoshinori Hasegawa, Ken Ito, Masayuki Yamamoto, Emily Kamel, Gaku Ichihara
Organizer
The 6th International Symposium on Nanotechnology, Occupational and Environmental Health; NanOEH6(第6回国際ナノテクノロジー労働環境衛生シンポジウム)
Place of Presentation
名古屋国際会議場、名古屋市
Year and Date
20131028-20131031
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[Presentation] The Effect of Pharyngeal Aspiration Exposureto Zinc Oxide Nanoparticles on Pulmonary Fibrosis Induced by Bleomycin in Mice2013
Author(s)
Wu W,Gaku Ichihara,Saeko tada-Oikawa,Yuka Suzuki,Jie Chang,Naozumi Hashimoto,Yoshimori Hasegawa,Corina Gabazza,Esteban Gabazza and Sahoko Ichihara
Organizer
the XIII International Congress of Toxicology
Place of Presentation
Coex,Seoul,Korea
Year and Date
20130630-20130704
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