研究者詳細

顔写真

タワラヤマ ヒロシ
俵山 寛司
Hiroshi Tawarayama
所属
大学院医学系研究科 網膜疾患制御学寄附講座
職名
助教
学位
  • 博士(医学) (東北大学)

e-Rad 研究者番号
20402414

研究分野 1

  • ライフサイエンス / 神経科学一般 /

論文 30

  1. Mitochondrial cysteinyl-tRNA synthetase 2 protects against excitotoxic retinal cell death via enhanced supersulfide production 査読有り

    Yuri Chida, Risa Shiokawa, Hiroshi Tawarayama, Minami Takeda, Hirokazu Hasegawa, Naoki Takahashi, Hiroshi Kunikata, Takaaki Akaike, Toru Nakazawa

    Free Radical Biology and Medicine 246 69-79 2026年3月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.freeradbiomed.2026.01.009  

    ISSN:0891-5849

  2. 酸化ストレス負荷に対するエノラーゼ1の網膜神経保護効果の検討

    高橋 直樹, 俵山 寛司, 佐藤 孝太, 津田 聡, 中澤 徹

    日本緑内障学会抄録集 36回 88-88 2025年9月

    出版者・発行元: 日本緑内障学会

  3. Involvement of Microglia in Retinal Ganglion Cell Injury Induced by IOP Elevation in a Rat Ex Vivo Acute Glaucoma Model

    Taimu Sato, Makoto Ishikawa, Yukitoshi Izumi, Naoya Shibata, Kota Sato, Michiko Ohno-Oishi, Hiroshi Tawarayama, Hiroshi Kunikata, Charles F. Zorumski, Toru Nakazawa

    Biomedicines 2025年7月8日

    DOI: 10.3390/biomedicines13071670  

  4. ENO1 Dysfunction-Mediated Glycolytic Attenuation Exacerbates Oxidative Stress-Induced Retinal Ganglion Cell Death via Altered ATP Synthesis Pathway. 国際誌 査読有り

    Naoki Takahashi, Hiroshi Tawarayama, Yuri Chida, Minami Takeda, Risa Shiokawa, Kota Sato, Satoru Tsuda, Toru Nakazawa

    Investigative ophthalmology & visual science 66 (9) 63-63 2025年7月1日

    DOI: 10.1167/iovs.66.9.63  

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    PURPOSE: The effects of enolase dysfunction-mediated glycolytic attenuation on oxidative stress-induced retinal ganglion cell (RGC) death were investigated. METHODS: Retinal expression of Enolase (ENO) 1 and 2 was detected using immunohistochemistry. Exogenous genes were introduced into mouse RGCs using viral vectors, and into the rat-derived retinal progenitor cell line R28 using lipofection. The effects of enolase dysfunction were evaluated using N-methyl-D-aspartate (NMDA)-induced RGC death and H2O2-induced death assays. Cell viability and gene expression were investigated using the alamarBlue, quantitative RT-PCR, and Western blotting, respectively. Reactive oxygen species (ROS) were detected using CM-H2DCFDA dye. 2-deoxyglucose and oligomycin were used to attenuate adenosine triphosphate (ATP) production in glycolysis and oxidative phosphorylation (OXPHOS), respectively. RESULTS: ENO1 and ENO2 were expressed in the RGCs. Enolase overexpression inhibited NMDA-induced mouse RGC death, whereas deficiency of ENO1 but not ENO2 enhanced cell death. Additionally, ENO1 overexpression prevented the CDKN2B-induced enhancement of RGC death. H2O2 treatment increased ENO1 expression in R28 cells and inhibited H2O2-induced cell death. ATP production was immediately enhanced in ENO1 wild-type cells treated with H2O2. 2-deoxyglucose and oligomycin prevented enhanced ATP production, but ATP levels were still higher than, or similar to, those in untreated wild-type cells; in contrast, in knockdown cells, oligomycin-mediated OXPHOS inhibition led to lower ATP production in H2O2-treatment than in untreated cells. H2O2 treatment increased ROS production in knockdown R28 cells. CONCLUSIONS: ENO1 dysfunction leads to glycolytic attenuation, resulting in an excessive dependence of ATP production on OXPHOS under oxidative stress, contributing to excitotoxicity-induced RGC death. Preventing glycolytic attenuation may represent a promising treatment for RGC degeneration.

  5. Estrogen, via ESR2 receptor, prevents oxidative stress-induced Müller cell death and stimulates FGF2 production independently of NRF2, attenuating retinal degeneration 査読有り

    Hiroshi Tawarayama, Keiko Uchida, Hirokazu Hasegawa, Masaaki Yoshida, Maki Inoue-Yanagimachi, Wataru Sato, Noriko Himori, Masayuki Yamamoto, Toru Nakazawa

    Experimental Eye Research 248 2024年11月

    DOI: 10.1016/j.exer.2024.110103  

    ISSN:0014-4835

    eISSN:1096-0007

  6. Nrf2欠損Mueller細胞はエストロゲン受容体β発現上昇を介して抗炎症効果が増強する

    内田 惠子, 檜森 紀子, 吉田 真彰, 俵山 寛司, 佐藤 孝太, 中澤 徹

    日本眼科学会雑誌 128 (臨増) 204-204 2024年3月

    出版者・発行元: (公財)日本眼科学会

    ISSN:0029-0203

  7. Glutathione trisulfide prevents lipopolysaccharide-induced retinal inflammation via inhibition of proinflammatory cytokine production in glial cells. 国際誌 査読有り

    Hiroshi Tawarayama, Kota Umeki, Maki Inoue-Yanagimachi, Naoki Takahashi, Hirokazu Hasegawa, Noriko Himori, Satoru Tsuda, Hiroshi Kunikata, Takaaki Akaike, Toru Nakazawa

    Scientific reports 13 (1) 11513-11513 2023年7月17日

    DOI: 10.1038/s41598-023-38696-4  

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    We aimed to investigate the impact of glutathione trisulfide (GSSSG) on lipopolysaccharide (LPS)-induced inflammation in retinal glia. Inflammatory responses in mouse-derived glial cells and Wistar rat retinas were stimulated with administration of LPS. Cell survival and proinflammatory cytokine production were examined using the Calcein-AM assay, and reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and enzyme-linked immunosorbent assay (ELISA), respectively. Retinal microglia were visualized with immunohistochemistry for Iba1. Administration of LPS (10 µg/mL) or GSSSG (less than 100 µM) did not affect survival of cultured primary Müller cells and established microglial cells (BV-2). RT-qPCR and ELISA indicated that GSSSG inhibited LPS-induced gene upregulation and protein secretion of proinflammatory cytokines in these glial cells and rat retinas. GSSSG inhibited LPS-induced activation of TGF-β-activated kinase 1 (TAK1), which is an upstream kinase of NF-κB, in BV-2 cells. Finally, in vivo experiments indicated that intravitreal administration of GSSSG but not its relative glutathione disulfide (GSSG) inhibited LPS (500 ng)-induced accumulation of Iba1-immunopositive microglia in rat retinas. Taken together, GSSSG has the potential to prevent pathogenesis of inflammation-associated ocular diseases by inhibiting proinflammatory cytokine expression in retinal glial cells.

  8. Isozyme-specific Histone Deacetylase 1/2 Inhibitor K560 Attenuates Oxidative Stress-induced Retinal Cell Death. 国際誌 査読有り

    Hiroshi Tawarayama, Yoshiyuki Hirata, Uchida Keiko, Noriko Himori, Shinichi Uesato, Toru Nakazawa

    Neuroscience letters 793 136978-136978 2022年11月23日

    DOI: 10.1016/j.neulet.2022.136978  

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    Oxidative stress-induced damage is an underlying mechanism in the pathogenesis of age-related retinal diseases. Here, we examined the effects of K560, a potential candidate drug for the treatment of these diseases, on oxidative stress-induced retinal cell death. K560 is a novel isozyme-specific inhibitor of histone deacetylase 1 and 2 (HDAC1/2). Histone acetylation in retinal lysates and dissociated retinal cells was detected with a western blot analysis and cell-based enzyme-linked immunosorbent assay (ELISA), respectively. The viability of mouse retinal cells was measured with an alamarBlue assay. We used immunohistochemistry for RNA binding protein with multiple splicing (RBPMS) to visualize the retinal ganglion cells (RGCs) of mice. A ELISA analysis indicated that histone acetylation was enhanced in dissociated mouse retinal cells tretaed with K560. The cell viability assay indicated that K560 attenuated both exogenous hydrogen peroxide-induced and endogenous oxidative stress-induced cell death in dissociated retinal cells. Western blot analysis indicated that intravitreal K560 administration enhanced the acetylation of histones H3 and H4 in mouse retinal lysates. To examine the effect of K560 on oxidative stress-induced RGC death, we performed whole-mount immunohistochemistry for RBPMS for retinas dissected from eyes treated with K560 or vehicle on day one, and K560 or vehicle and NMDA on day two. Quantification of RBPMS-immunopositive cells indicated that K560 attenuated NMDA-induced RGC death. Taken together, our findings suggest that administration of a HDAC1/2-specific inhibitor, i.e., K560, may be effective in the treatment of oxidative stress-mediated retinal degeneration and have less cytotoxicity than other known HDAC inhibitors, which are known to target a wide range of HDAC family members.

  9. Changes in glial cells and neurotrophic factors due to rotenone-induced oxidative stress in Nrf2 knockout mice. 国際誌 査読有り

    Maki Inoue-Yanagimachi, Noriko Himori, Keiko Uchida, Hiroshi Tawarayama, Kota Sato, Masayuki Yamamoto, Kazuhiko Namekata, Takayuki Harada, Toru Nakazawa

    Experimental eye research 226 109314-109314 2022年11月15日

    DOI: 10.1016/j.exer.2022.109314  

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    Glaucoma is one of the most common causes of blindness worldwide. It is thought to be a multifactorial disease with underlying mechanisms that include mitochondrial dysfunction and oxidative stress. Here, we used NF-E2 related factor 2 (Nrf2) knockout (KO) mice, which are vulnerable to oxidative stress, to examine a neuroprotective effect against oxidative stress due to rotenone, a mitochondrial complex I inhibitor. Wild-type (WT) and Nrf2 KO mice received an oral solution of rotenone for 30 days. We then extracted the retinas and performed immunohistochemistry and quantitative RT-PCR. We also prepared a primary Müller cell culture of samples from each mouse, added 30 μM rotenone, and then measured cell viability, cytotoxicity and CellRox absorbance. We also examined gene expression. We found a significant increase in the number of 8-OHdG-positive retinal ganglion cells (RGCs) after rotenone administration in both the WT and Nrf2 KO mice. There was no difference in the number of RNA-binding protein with multiple splicing (RBPMS)-positive RGCs in the WT and Nrf2 KO mice, but Nrf2 KO mice that were given rotenone had significantly less retinal gene expression of RBPMS than Nrf2 KO mice given a control. Moreover, there was significantly higher mRNA gene expression of vimentin and glial fibrillary acidic protein (GFAP) in Nrf2 KO mice that received rotenone than WT mice that received rotenone. A statistical analysis of the in vitro experiment showed that cell viability was lower, cytotoxicity was higher, and oxidative stress was higher in the Müller cells of the Nrf2 KO mice than the WT mice. Finally, brain-derived neurotrophic factor (BDNF) and basic fibroblast growth factor (bFGF) were significantly higher in the Müller cells of the Nrf2 KO mice than the WT mice. These findings suggest that in Nrf2 KO mice under oxidative stress caused by rotenone, temporary neurotrophic factors are secreted from the Müller cells, conferring neuroprotection in these cells.

  10. Development of an anti-oxidative intraocular irrigating solution based on reactive persulfides. 国際誌 査読有り

    Hiroshi Kunikata, Hiroshi Tawarayama, Satoru Tsuda, Takaaki Akaike, Toru Nakazawa

    Scientific reports 12 (1) 19243-19243 2022年11月10日

    DOI: 10.1038/s41598-022-21677-4  

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    Anti-oxidative intraocular irrigating solutions (IISs) based on reactive persulfides, such as oxidized glutathione disulfide (GSSG), are commonly used worldwide. However, even with GSSG-based IISs, it has been shown that oxidative stress can occur during surgery, posing a risk to intraocular tissues. This study compared two IISs: one containing GSSG and one containing an oxidized glutathione trisulfide (GSSSG). Experimental in vivo irrigation with the IISs in rabbits showed that there was less leakage into the anterior chamber of rabbit serum albumin during perfusion with a 300-μM GSSSG IIS than with a 300-μM GSSG IIS. Experimental in vivo cataract surgery in rabbits showed that aqueous flare was suppressed 3 days after surgery with a 600-μM GSSSG IIS, but not with a 300-μM GSSSG or 300-μM GSSG IIS. Furthermore, an in vitro experiment, without any live tissue, showed that reactive oxygen species were suppressed more strongly with a 600-μM GSSSG IIS than with a 300-μM GSSG IIS. Thus, this study found that novel IISs based on GSSSG had anti-inflammatory and anti-oxidative effects during and after intraocular surgery and may decrease the rate of complications after surgery.

  11. ロテノン誘導性酸化ストレス負荷環境下におけるグリア細胞分泌物の役割

    柳町 真希, 俵山 寛司, 檜森 紀子, 中澤 徹

    日本緑内障学会抄録集 33回 81-81 2022年9月

    出版者・発行元: 日本緑内障学会

  12. Glutathione Trisulfide Prevents Lipopolysaccharide-induced Inflammatory Gene Expression in Retinal Pigment Epithelial Cells 査読有り

    Hiroshi Tawarayama, Noriyuki Suzuki, Maki Inoue-Yanagimachi, Noriko Himori, Satoru Tsuda, Kota Sato, Tomoaki Ida, Takaaki Akaike, Hiroshi Kunikata, Toru Nakazawa

    Ocular Immunology and Inflammation 30 (4) 789-800 2022年5月19日

    出版者・発行元: Informa UK Limited

    DOI: 10.1080/09273948.2020.1833224  

    ISSN:0927-3948

    eISSN:1744-5078

  13. Glial cells modulate retinal cell survival in rotenone-induced neural degeneration. 国際誌 査読有り

    Hiroshi Tawarayama, Maki Inoue-Yanagimachi, Noriko Himori, Toru Nakazawa

    Scientific reports 11 (1) 11159-11159 2021年5月27日

    DOI: 10.1038/s41598-021-90604-w  

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    Administration of the mitochondrial complex I inhibitor rotenone provides an excellent model to study the pathomechanism of oxidative stress-related neural degeneration diseases. In this study, we examined the glial roles in retinal cell survival and degeneration under the rotenone-induced oxidative stress condition. Mouse-derived Müller, microglial (BV-2), and dissociated retinal cells were used for in vitro experiments. Gene expression levels and cell viability were determined using quantitative reverse transcription-polymerase chain reaction and the alamarBlue assay, respectively. Conditioned media were prepared by stimulating glial cells with rotenone. Retinal ganglion cells (RGCs) and inner nuclear layer (INL) were visualized on rat retinal sections by immunohistochemistry and eosin/hematoxylin, respectively. Rotenone dose-dependently induced glial cell death. Treatment with rotenone or rotenone-stimulated glial cell-conditioned media altered gene expression of growth factors and inflammatory cytokines in glial cells. The viability of dissociated retinal cells significantly increased upon culturing in media conditioned with rotenone-stimulated or Müller cell-conditioned media-stimulated BV-2 cells. Furthermore, intravitreal neurotrophin-5 administration prevented the rotenone-induced reduction of RGC number and INL thickness in rats. Thus, glial cells exerted both positive and negative effects on retinal cell survival in rotenone-induced neural degeneration via altered expression of growth factors, especially upregulation of microglia-derived Ntf5, and proinflammatory cytokines.

  14. ミトコンドリアComplex I阻害時のマウスミュラー細胞における神経栄養因子の検討

    柳町 真希, 檜森 紀子, 俵山 寛司, 佐藤 孝太, 行方 和彦, 原田 高幸, 山本 雅之, 中澤 徹

    日本緑内障学会抄録集 31回 72-72 2020年10月

    出版者・発行元: 日本緑内障学会

  15. Draxin-mediated Regulation of Granule Cell Progenitor Differentiation in the Postnatal Hippocampal Dentate Gyrus 国際誌 査読有り

    Hiroshi Tawarayama, Hirohisa Yamada, Ruhul Amin, Yuiko Morita-Fujimura, Helen M Cooper, Yohei Shinmyo, Hideaki Tanaka, Shuntaro Ikawa

    Neuroscience 431 184-192 2020年4月

    出版者・発行元: Elsevier BV

    DOI: 10.1016/j.neuroscience.2020.02.005  

    ISSN:0306-4522

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    The hippocampus is characterized by the presence of life-long neurogenesis. To elucidate the molecular mechanism regulating hippocampal neurogenesis, we studied the functions of the chemorepellent Draxin in neuronal proliferation and differentiation in the postnatal dentate gyrus. The present in vivo cell labeling and fate tracking analyses revealed enhanced differentiation of hippocampal neural stem and progenitor cells (hNSPCs) in the subgranular zone (SGZ) of Draxin-deficient mice. We observed a reduction in the number of BrdU-pulse labeled or Ki-67 immunopositive SGZ cells in the mutant mice. However, Draxin deficiency did not affect cell cycle duration of SGZ cells. In situ hybridization analysis indicated that the receptor component of the canonical Wnt pathway, Lrp6, is expressed in SGZ cells, including Nestin and Sox2 double-positive hNSPCs. Taken together with the previous finding that Draxin interacts physically with Lrp6, we postulate that Draxin plays a pivotal role in the regulation of Wnt-driven hNSPC differentiation to modulate the rate of neuronal differentiation in the progenitor population.

  16. ウサギ模擬白内障手術を用いたグルタチオン三硫化物(GS3G)による眼組織保護効果の検討

    鈴木 哲章, 國方 彦志, 俵山 寛司, 佐藤 孝太, 津田 聡, 中澤 徹

    日本眼科学会雑誌 124 (臨増) 183-183 2020年3月

    出版者・発行元: (公財)日本眼科学会

    ISSN:0029-0203

  17. Cyclin-Dependent Kinase Inhibitor 2b Mediates Excitotoxicity-Induced Death of Retinal Ganglion Cells 査読有り

    Hiroshi Tawarayama, Qiwei Feng, Namie Murayama, Noriyuki Suzuki, Toru Nakazawa

    Investigative Opthalmology & Visual Science 60 (13) 4479-4479 2019年10月1日

    出版者・発行元: Association for Research in Vision and Ophthalmology (ARVO)

    DOI: 10.1167/iovs.19-27396  

    ISSN:1552-5783

  18. Draxin regulates hippocampal neurogenesis in the postnatal dentate gyrus by inhibiting DCC-induced apoptosis 査読有り

    Hiroshi Tawarayama, Hirohisa Yamada, Ruhul Amin, Yuiko Morita-Fujimura, Helen M. Cooper, Yohei Shinmyo, Masakado Kawata, Shuntaro Ikawa, Hideaki Tanaka

    Scientific Reports 8 (1) 840 2018年12月1日

    出版者・発行元: Nature Publishing Group

    DOI: 10.1038/s41598-018-19346-6  

    ISSN:2045-2322

  19. 【感覚器障害の治療と研究の最前線 QOL向上とコミュニケーションのあり方を考える】先進感覚器研究コアセンターの感覚器研究プロジェクト

    國方 彦志, 佐藤 孝太, 俵山 寛司, 中澤 徹

    ファルマシア 54 (11) 1025-1029 2018年11月

    出版者・発行元: (公社)日本薬学会

    ISSN:0014-8601

    eISSN:2189-7026

  20. Ecel1 Knockdown With an AAV2-Mediated CRISPR/Cas9 System Promotes Optic Nerve Damage-Induced RGC Death in the Mouse Retina 査読有り

    Kota Sato, Yukihiro Shiga, Yurika Nakagawa, Kosuke Fujita, Koji M. Nishiguchi, Hiroshi Tawarayama, Namie Murayama, Shigeto Maekawa, Takeshi Yabana, Kazuko Omodaka, Shota Katayama, Qiwei Feng, Satoru Tsuda, Toru Nakazawa

    Investigative Opthalmology & Visual Science 59 (10) 3943-3943 2018年8月1日

    出版者・発行元: Association for Research in Vision and Ophthalmology (ARVO)

    DOI: 10.1167/iovs.18-23784  

    ISSN:1552-5783

  21. The chemorepellent draxin is involved in hippocampal mossy fiber projection 査読有り

    Hiroshi Tawarayama, Hirohisa Yamada, Yohei Shinmyo, Hideaki Tanaka, Shuntaro Ikawa

    Biochemical and Biophysical Research Communications 500 (2) 217-223 2018年6月2日

    出版者・発行元: Elsevier B.V.

    DOI: 10.1016/j.bbrc.2018.04.043  

    ISSN:1090-2104 0006-291X

  22. Novel function of the chemorepellent draxin as a regulator for hippocampal neurogenesis 査読有り

    Hiroshi Tawarayama

    Neural Regeneration Research 13 (5) 799-800 2018年5月1日

    出版者・発行元: Medknow Publications

    DOI: 10.4103/1673-5374.232465  

    ISSN:1876-7958 1673-5374

  23. The neuroprotective effect of hesperidin in NMDA-induced retinal injury acts by suppressing oxidative stress and excessive calpain activation 査読有り

    Shigeto Maekawa, Kota Sato, Kosuke Fujita, Reiko Daigaku, Hiroshi Tawarayama, Namie Murayama, Satoru Moritoh, Takeshi Yabana, Yukihiro Shiga, Kazuko Omodaka, Kazuichi Maruyama, Koji M. Nishiguchi, Toru Nakazawa

    Scientific Reports 7 (1) 6885 2017年12月1日

    出版者・発行元: Nature Publishing Group

    DOI: 10.1038/s41598-017-06969-4  

    ISSN:2045-2322

  24. Metabolomic profiling of reactive persulfides and polysulfides in the aqueous and vitreous humors 査読有り

    Hiroshi Kunikata, Tomoaki Ida, Kota Sato, Naoko Aizawa, Tomohiro Sawa, Hiroshi Tawarayama, Namie Murayama, Shigemoto Fujii, Takaaki Akaike, Toru Nakazawa

    SCIENTIFIC REPORTS 7 41984 2017年2月

    DOI: 10.1038/srep41984  

    ISSN:2045-2322

  25. ΔNp63α induces quiescence and downregulates the BRCA1 pathway in estrogen receptor-positive luminal breast cancer cell line MCF7 but not in other breast cancer cell lines. 査読有り

    Amin R, Morita-Fujimura Y, Tawarayama H, Semba K, Chiba N, Fukumoto M, Ikawa S

    Molecular oncology 10 (4) 575-593 2016年4月

    DOI: 10.1016/j.molonc.2015.11.009  

    ISSN:1574-7891

    eISSN:1878-0261

  26. Roles of Semaphorin-6B and Plexin-A2 in Lamina-Restricted Projection of Hippocampal Mossy Fibers 査読有り

    Hiroshi Tawarayama, Yutaka Yoshida, Fumikazu Suto, Kevin J. Mitchell, Hajime Fujisawa

    JOURNAL OF NEUROSCIENCE 30 (20) 7049-7060 2010年5月

    DOI: 10.1523/JNEUROSCI.0073-10.2010  

    ISSN:0270-6474

  27. Sema3a1 guides spinal motor axons in a cell- and stage-specific manner in zebrafish 査読有り

    Mika Sato-Maeda, Hiroshi Tawarayama, Masuo Obinata, John Y. Kuwada, Wataru Shoji

    Development 133 (5) 937-947 2006年3月1日

    DOI: 10.1242/dev.02268  

    ISSN:0950-1991

    eISSN:1477-9129

  28. Estrogen synthesis in relation to gonadal development of Japanese scallop, Patinopecten yessoensis: gonadal profile and immunolocalization of P450 aromatase and estrogen 査読有り

    Makoto Osada, Hiroshi Tawarayama, Katsuyoshi Mori

    Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology 139 (1) 123-128 2004年9月

    DOI: 10.1016/j.cbpc.2004.07.002  

    ISSN:1096-4959

  29. Repulsion and attraction of axons by Semaphorin3D are mediated by different neuropilins in vivo 査読有り

    MA Wolman, Y Liu, H Tawarayama, W Shoji, MC Halloran

    JOURNAL OF NEUROSCIENCE 24 (39) 8428-8435 2004年9月

    DOI: 10.1523/JNEUROSCI.2349-04.2004  

    ISSN:0270-6474

  30. Semaphorin3D guides retinal axons along the dorsoventral axis of the tectum. 国際誌 査読有り

    Yan Liu, Jason Berndt, Fengyun Su, Hiroshi Tawarayama, Wataru Shoji, John Y Kuwada, Mary C Halloran

    The Journal of neuroscience : the official journal of the Society for Neuroscience 24 (2) 310-8 2004年1月14日

    DOI: 10.1523/jneurosci.4287-03.2004  

    ISSN:0270-6474

    eISSN:1529-2401

︎全件表示 ︎最初の5件までを表示

MISC 4

  1. 過興奮性毒性モデルを用いたエノラーゼファミリーによる網膜神経節細胞保護効果の検討

    高橋直樹, 俵山寛司, 佐藤孝太, 津田聡, 中澤徹

    日本眼科学会雑誌 129 2025年

    ISSN: 0029-0203

  2. ラットex vivo急性緑内障モデルによるミクログリアを介したNLRP3介在型炎症反応の検討

    佐藤大夢, 石川誠, 大石路子, 神位りえ子, 佐藤孝太, 俵山寛司, 中澤徹

    日本眼科学会雑誌 128 2024年

    ISSN: 0029-0203

  3. AAV2-CRISPR/Cas9システムを用いた網膜神経節細胞のゲノム編集

    佐藤孝太, 藤田幸輔, 俵山寛司, 片山翔太, 西口康二, 中澤徹

    日本眼科学会雑誌 123 2019年

    ISSN: 0029-0203

  4. 先進感覚器研究コアセンターの感覚器研究プロジェクト

    國方彦志, 佐藤孝太, 俵山寛司, 中澤徹

    ファルマシア(Web) 54 (11) 1025‐1029(J‐STAGE) 2018年

    DOI: 10.14894/faruawpsj.54.11_1025  

    ISSN: 2189-7026

共同研究・競争的資金等の研究課題 9

  1. 新規眼内炎症緩和剤として期待される活性イオウ分子種によるIL1B発現制御機序の解明

    俵山 寛司, 中澤 徹

    2024年4月1日 ~ 2027年3月31日

  2. GWASによる緑内障感受性遺伝子CDKN2B-AS1のメカニズム解明

    面高 宗子, 俵山 寛司, 中澤 徹

    2024年4月1日 ~ 2027年3月31日

  3. グルタチオン三硫化物GSSSGの抗酸化・抗炎症作用に基づく難治性眼疾患の病態制御

    國方 彦志, 俵山 寛司, 中澤 徹

    2023年4月1日 ~ 2026年3月31日

  4. STING経路に着目した滲出型加齢黄斑変性の網膜下線維化の病態解明

    安田 正幸, 俵山 寛司, 佐藤 孝太

    2023年4月1日 ~ 2026年3月31日

  5. 炎症性眼疾患の治療・緩和を見据えた活性イオウ分子種による抗炎症作用機序の解明

    俵山 寛司

    2021年4月1日 ~ 2024年3月31日

  6. HDAC1/2特異的阻害剤K560の神経保護作用に基づく新規緑内障治療薬の開発 競争的資金

    俵山 寛司, 中澤 徹

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research

    研究種目:Grant-in-Aid for Scientific Research (C)

    研究機関:Tohoku University

    2018年4月1日 ~ 2021年3月31日

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    本研究プロジェクトでは、研究分担者によって開発されたアイソタイプ選択的新規HDAC阻害剤K560による網膜神経保護作用機序を解明することを目的としている。これまで実施した実験結果から、K560のマウスへの経口投与では、網膜ヒストンのアセチレーション亢進の程度に個体差が生じることが明らかになり、研究を進める上でクリアすべき問題点となっていた。そこで、経口投与ではなく、硝子体投与によりK560をデリバリーすることに方針転換したものの、K560は極度に疎水性であるため、製剤化検討を実施することで水系溶媒におけるK560の分散性を高めることを試み、これに成功した。そこで本年度にはK560製剤を用いたマウス投与実験を実施した。K560製剤を硝子体投与したところ、網膜ライセート中ヒストンH3及びH4タンパクの濃度依存的なアセチレーション亢進が認められた。また、投与個体間でアセチレーション亢進の程度に大きな差は認められなかった。つまり経口投与での問題点を克服することに成功した。次にNMDA傷害モデルマウスを用いて、K560によるヒストンタンパクのアセチレーション亢進が網膜神経節細胞死に与える影響について検討した。その結果、K560製剤処理眼ではNMDA投与による網膜神経節細胞死が顕著にレスキューされた。得られた実験データをもとに、現在、論文の執筆を進めており、研究助成の最終年度となる2020年度はリバイス実験を含めた論文化作業にエフォートを集中する。

  7. 海馬神経新生における軸索ガイダンス因子draxinの機能解析 競争的資金

    俵山 寛司

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

    研究種目:Grant-in-Aid for Scientific Research (C)

    研究機関:Tohoku University

    2015年10月21日 ~ 2018年3月31日

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    海馬神経新生には様々な分泌型分子の関与が報告されている。本研究で我々は、海馬神経新生における分泌型軸索反発分子ドラキシンの機能解析を行った。ドラキシンはTbr2(+)前駆体細胞及びNeuro2D(+)神経芽細胞に特異的に発現し、他方、その受容体候補分子DCCは主にニューロブラストに発現していた。また、ドラキシンノックアウトマウスにおける表現型解析の結果から、同マウスでは、DCC(+)ニューロブラストの細胞死が亢進することを見出し、他方、in vitroの実験からドラキシンがDCC誘導性細胞死を抑制することを見出した。以上の結果からドラキシンによる海馬神経新生制御機序の一端が明らかになった。

  8. 癲癇モデルマウスを用いたタキシフェン 誘導 体リダイフェン-D による神経保護効果の検討 競争的資金

    俵山 寛司

    2015年4月 ~ 2016年3月

  9. 海馬形成における、神経栄養因子としてのDraxinの機能解析 競争的資金

    俵山 寛司

    提供機関:Japan Society for the Promotion of Science

    制度名:Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)

    研究種目:Grant-in-Aid for Young Scientists (B)

    2013年4月1日 ~ 2015年3月31日

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    海馬は記憶や空間認知を司る重要な脳組織であるが、歯状回顆粒細胞がこれらの高次脳機能を担っている。以前我々は、軸索ガイダンス分子であるドラキシンを同定し、海馬形成に必須であることを明らかにした。ドラキシン遺伝子破壊マウスでは、死細胞が増加するとともに海馬が萎縮し、海馬機能にも異常をきたす。今回我々は、海馬神経新生におけるドラキシンの役割について解明を試み、以下の結論を得た。(1)ドラキシンはその受容体であるDCCを介し、新生神経細胞の分化の過程で起こり得る細胞死を抑制する、(2)強力な分化誘導能を有するWntの活性を減弱し、神経細胞の分化が適切な速度で進行するよう調節する。

︎全件表示 ︎最初の5件までを表示