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神経活動によるシナプスの抑圧・退行のメカニズム

Research Project

Project/Area Number 07279104
Research Category

Grant-in-Aid for Scientific Research on Priority Areas (A)

Allocation TypeSingle-year Grants
Research InstitutionJichi Medical University

Principal Investigator

川合 述史  自治医科大学, 医学部, 教授 (00073065)

Co-Investigator(Kenkyū-buntansha) 斎藤 延人  東京大学, 医学部, 助手 (60262002)
下濱 俊  京都大学, 医学部, 助手 (60235687)
寺島 俊雄  神戸大学, 医学部, 教授 (20101892)
小松 由紀夫  名古屋大学, 環境医学研究所, 教授 (90135343)
宮本 英七  熊本大学, 医学部, 教授 (50109659)
久場 健司  名古屋大学, 医学部, 教授 (60080561)
津本 忠治  大阪大学, 医学部, 教授 (50028619)
Project Period (FY) 1995 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥145,000,000 (Direct Cost: ¥145,000,000)
Fiscal Year 1998: ¥30,100,000 (Direct Cost: ¥30,100,000)
Fiscal Year 1997: ¥36,300,000 (Direct Cost: ¥36,300,000)
Fiscal Year 1996: ¥42,900,000 (Direct Cost: ¥42,900,000)
Fiscal Year 1995: ¥35,700,000 (Direct Cost: ¥35,700,000)
Keywords神経変性 / 細胞死 / シナプス伝達 / 長期増強 / 長期抑圧 / 虚血 / 海馬 / 大脳視覚野 / 視覚野 / 細胞内情報伝達
Research Abstract

本研究はシナプス活動の退行時また神経変性時に神経回路に生ずる変化の分子機序を解析することを目標としている。川合述史は砂ネズミ海馬における虚血耐性獲得時の機能変化をしらべた。非致死性の短時間虚血を加えた数日後に致死性の虚血を加えると、遅発性神経細胞死は防がれる。この虚血耐性獲得時の海馬スライスについてLTP発現の変化とイメージング法によるカルシウム上昇低下を見出した。斎藤延人は虚血耐性獲得の分子機序について研究を行い、アポトーシス抑制遺伝子のXIAPがPC12細胞の細胞死抑制効果をもつこととXIAPmRNAの脳虚血ラット海馬における発現上昇を認めた。下浜峻は細胞死を伴うアルツハイマー病などの神経変性疾患脳における細胞内情報伝達分子の変動の解析を行い、PLCのアイソザイムに関してPLC-γlやPLC-δlの活性変化を明らかにした。津本忠治は幼若ラットの大脳皮質視覚野スライス標本を用い、シナプス長期抑圧時の脳由来神経栄養因子(BDNF)の役割を抗体を用いてしらべ、内因性BDNFの活性の阻害によって長期抑圧が出現することを明らかにした。小松由紀夫は大脳視覚野の抑制性シナプスの長期増強をしらべ、外液カルシウム濃度に依存して長期増強の起こること、Kチャンネルのブロックで促進されることを明らかにした。宮本英七は海馬CAl領域における長期増強の誘導因子について研究を進め、CaMII活性化反応とさまざまなMAPKの活性化反応の相関についてしらべた。久場健司はシナプス抑圧時の細胞内カルシウム変化の解析を行い、CICRによる可塑的伝達物質放出の促進効果やアドレナリンの作用長期増強反応についてしらべた。また寺嶋俊雄は自然派生ミュータントであるSRKラットとリーラーマウスの異所性錐体路細胞における軸索側枝の消退機構について新知見を得た。

Report

(4 results)
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • 1996 Annual Research Report
  • 1995 Annual Research Report
  • Research Products

    (28 results)

All Other

All Publications (28 results)

  • [Publications] Kawai,K.: "Preconditioning in vivo ischemia inhibits anoxic LTP and funtionally protects CA1 neurons in the gerbil." J.Cereb.Blood Flow Metab.18. 288-296 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Akaneya,Y.: "Brain-derived neurotrophic factor enhances long-term potentiation in rat visual cortex." J.Neurosci.17. 6707-6716 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Komatsu,Y.: "GABAB receptors, monoamine receptors, and postsynaptic inositol trisphosphate-induced Ca^<2+> release are involved in the induction of long-term potentiation at visual cortical inhibitory synapses." J.Neurosci.16. 6342-6352 (1996)

    • Related Report
      1998 Annual Research Report
  • [Publications] Narita,K.: "A Ca^<2+>-induced Ca^<2+> release mechanism involved in asynchronous exocytosis at frog motor nerve terminals." J.Gen.Physiol.112. 593-609 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Ohmitsu,M.: "Phosphorylation of myristoylated alanine-rich protein kinase C substrate by mitogen-activated protein kinase in cultured rat hippocampal neurons following stimulation of glutamate receptors." J.Biol.Chem.274. 408-417 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Shimazaki,K.: "Reduced calcium elevation in hippocampal CA1 neurons of ischemia-tolerant gerbils." NeuroReport. 9. 1875-1878 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Shimohama,S.: "Phospholopase C isozymes in the human brain and their changes in Alzheimer's disease." Neuroscience. 82. 999-1007 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Fujimoto,Y.: "Ambiguus nucleus neurons innervating the abdominal esophagus are malpositioned in the reeler mouse." Brain Res.811. 156-160 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] T.Miyakawa, et al.: "Fyn-kinase as a determinant of ethanol sensitivity : Relation to NMDA receptor function." Science. 278. 698-701 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Akaneya, et al.: "Brain-derived neurotrophic factor enhances long-term potentiation in rat visual cortex." J.Neurosci.17. 6707-6716 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] N.Torii, et al.: "Quantal analysis of presynaptic involvement in expression of neocortical short- and long-term depression." Neuroscience. 79. 317-321 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] M.Morioka, et al.: "Calcineurin in the adult rat hippocampus : Different distribution in CA1 and CA3 subfields." Neuroscience. 78. 673-684 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] M.Sugimura, et al.: "DY-9760e,a novel calmodulin antagonist with cytoprotective action." Eur.J.Pharmacology. 336. 99-106 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Kawasaki, et al.: "Activation and involvement of p38 mitogen-activated protein kinase in glutamate-induced apoptosis in rat cerebellar granule cells." J.Biol.Chem.272. 18518-18521 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] N.Kawai, et al.: "Primer on Cerebrovascular Disease" Academic Press, 3 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] E.Miyamoto, et al.: "Kinases and Phosphatases in Lymphocyte and Neuronal Signaling" Springer-Verlag, 10 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Tsubokawa,H.,et al.: "Intracellular inositol 1,3,4,5-tetrakisphosphate enhances the calcium current in hippocampal CAl neurones of the gerbil following transient forebrain ischaemia." J.Physiol.497. 167-178 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Shimohama,S.,et al.: "Changes of neurocalcin,a calcium-binding protein,in the brain of patients with Alzheimer's disease" Brain Res.716. 233-236 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Akaneya,Y.,et al.: "Long-term depression blocked by brain-derived neurotrophic factor in rat visual cortex." J.Neurophysiol.76. 4198-4201 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Yanagihara,N.,et al.: "Phosphorylation of chromogranin A and catecholamine secretion stimulated by elevation of intracellular Ca^<2+> in cultured bovine adrenal medullary cells." J.Biol.Chem.271. 17463-17468 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Komatsu,Y.: "GABA_B receptors,monoamine receptors,and postsynaptic inositol triphosphate-induced Ca^<2+> release are involved in the induction of long-term potentiation at visual cortical inhibitory synapses." J.Neurosci.16. 6342-6352 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Kuba,K.,et al.: "A UV laser-scanning confocal microscope for the measurement of intracellular Ca^<2+>." Cell Caicium. 16. 205-218 (1994)

    • Related Report
      1996 Annual Research Report
  • [Publications] Tsubokawa H, et al.: "Effects of spider toxin and its analog on glutamate-activated currents in the hippocampal CA1 neuron after ischemia." J. Neurophysiol.74. 218-225 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Otsu Y, et al.: "Hebbian induction of LTP in visual cortex; A perforated patch clamp study in cultures neurons." J. Neurophysiol.74. 2437-2444 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Yoshizaki K, et al.: "Ca^<2+> -induced Ca^<2+> release and its activation in response to a single action potential in rabbit otic ganglion cells." J. Physiol. 486. 177-187 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Fukunaga K, et al.: "Increased phosphorylation of Ca^<2+>/calmodulin-dependent protein kinase II and its endogenous substrates in the induction of long-term potentiation." J. Biol. Chem.270. 6119-6124 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Shimohama S, et al.: "Alteration of phospholipase C-δ protein level and specific activity in Alzheimer's desease." J. Neurochem.64. 2629-2634 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Saito, N, et al.: "Reexpression of developmentally regulated MAP2c mRNAs after ischemia: Colocalization with hsp72 mRNA in vulnerable neurons." J. Cereb. Blood Flow Metab.15. 205-215 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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