• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Neural circuits of L-DOPAnergic neurotransmission and their mechanisms of action

Research Project

Project/Area Number 20K07069
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 47040:Pharmacology-related
Research InstitutionYokohama City University

Principal Investigator

MASUKAWA Daiki  横浜市立大学, 医学部, 助教 (10711898)

Co-Investigator(Kenkyū-buntansha) 實木 亨  三重大学, 医学系研究科, 准教授 (10546675)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
KeywordsL-DOPA / 延髄弧束核 / 線条体 / 中枢性血圧制御 / GPR143 / 黒質-線条体 / vGlut2 / Tyrosine hydroxylase / ドーパ / 大動脈神経 / 延髄孤束核 / ドパミン / グルタミン酸
Outline of Research at the Start

我々は、L-DOPA(ドーパ)神経伝達物質仮説を提唱し、その検証を行ってきた。しかしながら、ドーパ神経伝達に関わる神経回路およびその生理学的役割は未だ明らかとなっていない。本研究においては、下位脳幹部および腹側被蓋野-側坐核神経系に焦点を当て、ドーパ含有神経回路の選択的刺激と応答を捉える実験系を確立し、ドーパが伝達物質として作動する神経回路を同定・解析するとともに、心血管・行動制御を指標にドーパがグルタミン酸作動性神経系ならびにドパミン (DA) 作動性神経系とどのような機能的相関性を示すかを解明することを目的とする。

Outline of Final Research Achievements

We have proposed the hypothesis that L-DOPA, the precursor of dopamine (DA), is a neurotransmitter. In this study, we aimed to identify the neural circuits in which L-DOPA acts as a neurotransmitter and elucidate its physiological roles. Using microdialysis experiment, we found that L-DOPA and dopamine released from the dorsal striatum. The effects of dopamine D2 receptor agonists were attenuated by inhibiting the release of L-DOPA. Our findings suggests that endogenous L-DOPA modulates dopamine D2 receptor function in the dorsal striatum.

Academic Significance and Societal Importance of the Research Achievements

ドーパは現在でも、最も使用されるパーキンソン病治療薬であるが、その作用は、ドパミンへの変換を介していると考えられてきた。本研究において、ドーパが、GPR143 を介してドパミン D2 受容体の機能を制御することを明らかにした。このことは、ドーパ自体が薬理作用を持つことを示す。本研究の成果は、パーキンソン病治療法の見直しや、統合失調症などのドパミン D2 受容体を治療標的とする疾患に対する治療法の開発に貢献する可能性がある。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (7 results)

All 2023 2022 2020

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (3 results)

  • [Journal Article] Coupling between GPR143 and dopamine D2 receptor is required for selective potentiation of dopamine D2 receptor function by L-3,4-dihydroxyphenylalanine in the dorsal striatum2023

    • Author(s)
      Masukawa D, Kitamura S, Tajika R, Uchimura H, Arai M, Takada Y, Arisawa T, Otaki M, Kanai K, Kobayashi K, Miyazaki T, Goshima Y
    • Journal Title

      J Neurochem

      Volume: 165 Issue: 2 Pages: 177-195

    • DOI

      10.1111/jnc.15789

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Involvement of the L-DOPA receptor GPR143 in acute and chronic actions of methylphenidate2023

    • Author(s)
      Hiraku Uchimura、Kaori Kanai、Masami Arai、 Miyu Inoue、Akitoyo Hishimoto、Daiki Masukawa、Yoshio Goshima
    • Journal Title

      Journal of Pharmacological Science

      Volume: 152 Pages: 178-181

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] L-DOPA receptor GPR143 functionally couples with adrenergic α1B receptor at the second transmembrane interface2023

    • Author(s)
      Daiki Masukawa、Ryo Takahagi、Yuka Nakao、Yoshio Goshima
    • Journal Title

      Biol. Pharm. Bull.

      Volume: -

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Right ventricular overloading is attenuated in monocrotaline-induced pulmonary hypertension model rats with a disrupted Gpr143 gene, the gene that encodes the 3,4-l-dihydroxyphenyalanine (l-DOPA) receptor.2022

    • Author(s)
      Nakano M, Koga M, Hashimoto T, Matsushita N, Masukawa D, Mizuno Y, Uchimura H, Niikura R, Miyazaki T, Nakamura F, Zou S, Shimizu T, Saito M, Tamura K, Goto T, Goshima Y.
    • Journal Title

      J Pharmacol Sci.

      Volume: 148 Issue: 2 Pages: 214-220

    • DOI

      10.1016/j.jphs.2021.11.008

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 線条体間接路における L-DOPA の生理学的役割解明2022

    • Author(s)
      増川太輝、五嶋良郎
    • Organizer
      第95回日本薬理学会年会
    • Related Report
      2021 Research-status Report
  • [Presentation] Functional analysis of GPR143, an L-DOPA receptor, in GPCRs hetero-oligomers2020

    • Author(s)
      増川太輝、五嶋良郎
    • Organizer
      第94回薬理学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Impairment of nicotine-induced behavioral changes in L-DOPA receptor gene (Gpr143)-deficient mice, and genetic associations of single nucleotide polymorphisms in the GPR143 gene with severity of nicotine dependence in Japanese in dividuals2020

    • Author(s)
      Daiki Masukawa, Nishiawa Daisuke, Yuka Kasahara, Satoshi Kitamura, Kaori Kanai, Kazutaka Ikeda, Yoshio Goshima
    • Organizer
      第43回神経科学大会
    • Related Report
      2020 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi