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ドパミンD2受容体の遺伝子導入による記憶障害治療の試み

Research Project

Project/Area Number 14657230
Research Category

Grant-in-Aid for Exploratory Research

Allocation TypeSingle-year Grants
Research Field Psychiatric science
Research InstitutionNagoya University

Principal Investigator

井口 昭久  名古屋大学, 大学院・医学系研究科, 教授 (20109763)

Co-Investigator(Kenkyū-buntansha) 梅垣 宏行  名古屋大学, 医学部附属病院, 助手 (40345898)
Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2003: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2002: ¥2,500,000 (Direct Cost: ¥2,500,000)
Keywordsアデノウィルス / 海馬 / ドーパミンD2受容体 / 記憶 / ドーパミン受容体 / アデノウイルスベクター
Research Abstract

ドーパミン神経系が学習記憶に関与することはよく知られているが、海馬のドーパミン神経系についてはこれまで余り注目されてこなかった。
我々は、学習記憶能の改善のための新たな治療ターゲットとして、海馬のドーパミンD2受容体(D2R)に着目して以下の研究を行った。
1)D2Rの遺伝子導入のためのアデノウイルスベクターの開発
アデノウイルスベクターによってラット脳へのD2Rの遺伝子導入を行い、Positron Emission Tomographyを用いて、遺伝子発現の経過を生体内で追跡する技術を開発し(Synapse 43:195-200,2002.)、それによって加齢に伴う遺伝子発現経過の違いを明らかにした(Neuroscience 121/2 479-486,2003)。
2)海馬のD2Rの学習記憶への関与の検討
昨年はpassive avoidanceの課題において、コリン欠乏食飼育ラットの学習記憶に海馬のD2Rが関わっている可能性を示したが、本年は、八方迷路をもちいて正常ラットの学習記憶にも、海馬のD2Rが関与していることを明らかにした(33^<nd> annual meeting of Society for Neuroscience)。
3)脳透析をもちいた検討
D2Rの阻害薬の海馬への直接投与によるコリン欠乏食飼育ラットの学習記憶能力の低下に、海馬のアセチルコリンの放出能の低下が関与している可能性を示唆する予備的なデータを得た。また加齢に伴うD2Rの反応性の変化を脳透析によって検討した(Exp.Gerontol. 38/39;1009-1013,2003)。

Report

(2 results)
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] ZHU W., UMEGAKI H., IGUCHI A., et al.: "Different glial reaction to hippocampal stab wounds in young adult and aged rats."J Gerontol A Blot Sci Med Sci. 58(2). B117-B122 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] UMEGAKI H., IGUCHI A., et al.: "Involvement of the entorhinal cortex in the stress response to immobilization, but not to insulin-induced hypoglycemia."J Neuroendo. 15. 237-241 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] UMEGAKI H., IGUCHI A., et al.: "Identification of factors associated with long hospital stay in Japanese geriatric ward."Geriatr Gerintol Int. 3(2). 120-127 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] KUROTANI S., UMEGAKI H., IGUCHI A., et al.: "The Age-Associated Changes of Dopamine-Acetylcholine Interaction in the Striatum."Exp.Gerontol. 38/39. 1009-1013 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] UMEGAKI H., IGUCHI A., et al.: "Longitudinal follow-up study of adenoviral vector-mediated gene transfer of dopamine D_2 receptors in the striatum in young, middle-aged, and aged rats : a positron emission tomography study"Neuroscience. 121-122. 479-486 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] KUZUYA M., UMEGAKI H., IGUCHI A., et al.: "Atrovastatin, 3-Hydroxy 3-Methylglutaryl Coenzyme A Reductase Inhibitor, reduces bone resorption in the elderly."JAGS. 51. 1677-1678 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] MOGI N., UMEGAKI H., IGUCHI A., et al.: "Cognitive Function in Japanese Elderly with Type 2 Diabetes Mellitus."J. Diabetes Complict.. (in press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] YAMAMOTO S., UMEGAKI H., IGUCHI A., et al.: "The Clock Drawing Test as a Valid Screening Method for Mild Cognitive Impairment"Dementi Geriatr Cogn. (in press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] ONISHI J., UMEGAKI H., IGUCHI A., et al.: "The Relationship between Functional Disability and Depressive Mood in Japanese Older Adult Inpatients."J Geriatr Psychiatr Neurol. (in press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 大西丈二, 梅垣宏行, 井口昭久, 他: "心理症状(BPSD)および介護環境の介護負担に与える影響"日本老年精神医学会誌. 14(4). 465-473 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Umegaki H, Ishiwata K, et al.: "In vivo assessment of adenoviral vector-mediated gene expression of dopamine D_2 receptors in the rat striatum by positron emission tomography"Synapse. 43. 195-200 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Ishiwata K, Umegaki H, et al.: "Positron emission tomography and ex vivo and in vitro autradiography studies on dopamin D2-like receptor degeneration in quinolinic acid-lesioned rat striatum"Nuclear Medicine and biology. 29. 307-316 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Umegaki H, Ushida C, et al.: "Plasma Insulin and Glucose Levels in Elderly Female Subjects with Alzheimer's Disease"Geriatr Gerontol Int. 2. 75-79 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Zhu W, Umegaki H, et al.: "Different glial reaction to hippocampal stab wounds in young adult and aged rats"J Gerotol. (in press). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Umegaki H, Zhu W, Nalamura A, Suziki Y, Takada M, Endo H, Iguchi A: "Involvement of the entorhinal cortex in the stress response to immobilization, but not to insulin-induced hypoglycemia"J Neuroendo. 15. 1-5 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Umegaki H, Ando F, et al.: "Identification of factors associated with long hospital stay in Japanese geriatric ward"Geriatr Gerintol Int. (in press). (2003)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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