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新しい作用機序を有する天然由来抗痴呆症薬の研究

Research Project

Project/Area Number 18790039
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Biological pharmacy
Research InstitutionTohoku University

Principal Investigator

小原 祐太郎  Tohoku University, 大学院・薬学研究科, 助教 (40400270)

Project Period (FY) 2006 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2007: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2006: ¥2,100,000 (Direct Cost: ¥2,100,000)
Keywordsグリア細胞 / 神経栄養因子 / 神経成長因子(NGF) / 神経突起伸展 / 痴呆 / 1321N1細胞 / PC12細胞
Research Abstract

われわれは天然界由来の低分子性の神経栄養因子関連化合物を探索し、それらの作用メカニズムを詳細に解明してきた。その結果、担子菌ケロウジ(Sarcodon scabrosus)から単離された新規ジテルペン化合物のスカブロニン類が1321N1ヒトアストロサイトーマからの神経成長因子(NGF)の生合成を促進することを明らかにしてきた。さらに昨年度から今年度にかけて、ケロウジと同属のキノコ(Sarcodoncyrneus)から新たに単離されたシルネイン類およびグラウコピン類の薬理作用をイタリアのMarcotullio博士らのグループと海外共同研究にて検討した。シルネイン類およびグラウコピン類もスカブロニン類と同様にシアタン骨格を有するジテルペン化合物であることから、スカブロニン類と同様の薬理活性を示すことが予想された。実際、1321N1細胞におけるNGF遺伝子の発現レベルを定量すると、すべてのシルネイン類およびグラウコピンCは作用を示した。さらに、これらの化合物群の中でも特にシルネインAは未分化神経細胞のモデルであるPC12細胞の分化をも強く促した。これらの化合物の構造活性相関を検討したところ、C4位のヒドロキル基がPC12細胞の分化に対して、5員環のケトン基、ヒドロキシル基などが1321N1細胞におけるNGFの遺伝子発現に重要なことが示唆された(以上の成果は、Bioorg Med Chem 2007に掲載された)。さらに、われわれはシルネイン類のPC12細胞の神経突起伸展作用の詳細なメカニズムを検討したところ、シルネイン類は低分子量Gタンパク質のRac1の活性を制御し、細胞骨格タンパク質のアクチンの動態を変化させることを明らかにした(これらの成果はLife Sci 2007に掲載された)。

Report

(2 results)
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (15 results)

All 2008 2007 2006

All Journal Article (11 results) (of which Peer Reviewed: 5 results) Presentation (4 results)

  • [Journal Article] The requirement of Ras and Rap1 for the activation of ERKs by cAMP, PACAP, and KCl in cerebellar granule cells.2007

    • Author(s)
      Yutaro Obara, Angela Horgan, Philip Stork.
    • Journal Title

      J Neurochem 101

      Pages: 470-482

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A novel cyathane diterpene, cyrneine A, induces neurite outgrowth in a Rac1-dependent mechanism in PC12 cells.2007

    • Author(s)
      Yutaro Obara, Tomohiro Hoshino, Maria Carla Marcotullio, Rita Pagiotti, Norimichi Nakahata.
    • Journal Title

      Life Sci 80

      Pages: 1669-1677

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Cyathane diterpenes from Sarcodon cyrneus and evaluation of their activities of neuritegenesis and nerve growth factor production.2007

    • Author(s)
      Maria Carla Marcotullio, Rita Pagiotti, Federica Maltese, Gildas Norbert Oball-Mond Mwankie, Tomohiro Hoshino, Yutaro Obara, Norimichi Nakahata.
    • Journal Title

      Bioorg Med Chem 15

      Pages: 2878-2882

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 5, 19-cyclo-9β, 10ξ-androstane-3, 17 dione promotes neurotrophic factor biosynthesis in 1321N1 human astrocytoma cells and improves passive avoidance learning impairment.2007

    • Author(s)
      Yutaro Obara, Asami Haganuma, Shinsuke Murakami, Toshiki Chiba, Koichiro Mori, Osamu Nakagawasai, Takeshi Tadano, Haruhisa Kikuchi, Yoshiteru Oshima, Norimichi Nakahata.
    • Journal Title

      Brain Res 1184

      Pages: 57-64

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Lycopladine E, a new C16N1-type alkaloid from Lycopodium complanatum.2007

    • Author(s)
      Takaaki Kubota, Hiroko Yahata, Kan'ichiro Ishiuchi, Yutaro Obara, Norimichi Nakahata, Junichi Kobayashi.
    • Journal Title

      Heterocycles 74

      Pages: 843-848

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Complanadines C and D, new dimeric alkaloids from Lycopodium complanatum.2007

    • Author(s)
      Kan'ichiro Ishiuchi, Takaaki Kubota, Yuzuru Mikami, Yutaro Obara, Norimichi Nakahata, Jun'ichi Konayashi
    • Journal Title

      Bioorg. Med. Chem. 15

      Pages: 413-417

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Neurite outgrowth activity of cyathane diterpenes from Sarcodon cyrneus, Cyrneines A and B.2006

    • Author(s)
      Maria Carla Marcotullio, Rita Pagiotti, Federica Maltese, Yutaro Obara, Tomohiro Hoshino, Norimichi Nakahata, Massimo Curini
    • Journal Title

      Planta Med. 72

      Pages: 819-823

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Inhibitory effect of naringin on lipopolysaccharide (LPS)-induced endotoxin shock in mice and nitric oxide production in RAW 264.7 macrophages.2006

    • Author(s)
      Syu-ichi Kanno, Ai Shouji, Ayako Tomizawa, Takako Hiura, Yuu Osanai, Mayuko Ujibe, Yutaro Obara, Norimichi Nakahata, Masaaki Ishikawa
    • Journal Title

      Life Sci. 78

      Pages: 673-681

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Neurotrophic factor production in human astrocytoma cells by 2,5,6-tribromogramine via activation of epsilon isoform of protein kinase C.2006

    • Author(s)
      Masaki Saito, Megumi Hori, Yutaro Obara, Yasushi Ohizumi, Satoko Ohkubo, Norimichi Nakahata
    • Journal Title

      Eur. J. Pharm. Sci. 28

      Pages: 263-271

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Development of anti-dementia drugs related to neurotrophic factors.2006

    • Author(s)
      Yutaro Obara.
    • Journal Title

      Yakugaku Zasshi 126

      Pages: 747-755

    • NAID

      110006154985

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Lycopladines B-D and lyconadin B, new alkaloids from Lycopodium complanatum.2006

    • Author(s)
      Kan'ichiro Ishiuchi, Takaaki Kubota, Tomohiro Hoshino, Yutaro Obara, Norimichi Nakahata, Jun'ichi Konayashi
    • Journal Title

      Bioorg. Med. Chem. 14

      Pages: 5995-6000

    • Related Report
      2006 Annual Research Report
  • [Presentation] βγ subunits of Gi/o suppress epidermal growth factor-induced phosphorylation of extracellular signal-regulated kinase 5, whereas they enhance phosphorylation of extracellular signal-regulated kinase 1/2.2008

    • Author(s)
      岡野優美子、小野幸子、○小原祐太郎、山内新、星野智洋、黒瀬等、中畑則道
    • Organizer
      第81回日本薬理学会年会
    • Place of Presentation
      横浜
    • Year and Date
      2008-03-18
    • Related Report
      2007 Annual Research Report
  • [Presentation] cAMPおよびCa^<2+>誘発性のERK活性化における低分子量Gタンパク質RasとRap1の関与について2007

    • Author(s)
      ○小原祐太郎、Angela Horgan、中畑則道、Philip Stork
    • Organizer
      2007日本生化学会・日本分子生物学会合同年会
    • Place of Presentation
      横浜
    • Year and Date
      2007-12-13
    • Related Report
      2007 Annual Research Report
  • [Presentation] A synthetic cannabinoid, CP55940, inhibits LPS-induced cytokine production in a CB_1-independent manner in rat cerebellar granulecells.2007

    • Author(s)
      ○小原祐太郎、千葉俊樹、中畑則道
    • Organizer
      第37回神経科学学会 2007年11月
    • Place of Presentation
      サンディエゴ(アメリカ)
    • Year and Date
      2007-11-07
    • Related Report
      2007 Annual Research Report
  • [Presentation] 小脳顆粒神経細胞におけるcAMPおよびCa^<2+>誘発性のERK活性化に関する低分子量Gタンパク質RasとRap1の関与について2007

    • Author(s)
      ○小原祐太郎、Angela Horgan、中畑則道、Philip Stork
    • Organizer
      第6回生命科学研究会
    • Place of Presentation
      千葉
    • Year and Date
      2007-07-06
    • Related Report
      2007 Annual Research Report

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Published: 2006-04-01   Modified: 2016-04-21  

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