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Peripheral blood flow redistribution induced by pressor amino acid L-cysteine stimulations of the rat medulla

Research Project

Project/Area Number 18K06854
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 48020:Physiology-related
Research InstitutionHiroshima University

Principal Investigator

Takemoto Yumi  広島大学, 医系科学研究科(医), 講師 (60188224)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords血流再配分 / 総頸動脈 / 筋血流 / RVLM昇圧野 / PcRt / 交感神経前運動ニューロン / 自律神経の中枢 / 延髄 / 血流配分 / 自律神経中枢 / 血管交感神経 / 頸動脈血流 / L-システイン / 唾液核 / 脳血流 / L-cysteine / システイン / イオンチャネル型興奮性アミノ酸レセプター / アドレナリン分泌 / 血流の再配分 / 中枢性循環作用 / 延髄循環中枢 / 興奮性アミノ酸 / RVLM
Outline of Final Research Achievements

Limited amount of blood in the body is quickly distributed via autonomic nerves’ regulation as if twisting a tap to the organs that need blood when needed, but the mechanism in the brain has not yet been elucidated. In this study, we focused on the medulla oblongata of rats, which regulates sympathetic nerves distributed in blood vessels throughout the body and parasympathetic nerves to head blood vessels. We chemically stimulated the medulla with trace amounts of the amino acid L-cysteine, measuring muscle blood flow or cranial blood flow. We clarified that the reaction sites of muscle and cranial blood flow in the medulla are different dependent on the body situation and the parasympathetic nerve origin is wider than the conventional salivary nucleus.

Academic Significance and Societal Importance of the Research Achievements

生命維持に必須の循環系調節メカニズムはその重要性から歴史的に多くの研究者の関心を集め、解明が進んでいる分野の一つである。しかしながら、中枢ネットワークが関与する血流の再配分の仕組みについてはいまだ手が付けられていない。本研究では、脳で統合された情報の出口である延髄における筋および頭頸部への血流調節部位を明らかにしたので、引き続き延髄に始まる中枢ネットワークの接続や機能の解明が進み、脳血流の管理等、生命維持に直結した医療の進歩に貢献することが期待される。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (15 results)

All 2021 2020 2019 2018

All Journal Article (6 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 4 results) Presentation (9 results) (of which Int'l Joint Research: 6 results)

  • [Journal Article] An origin of carotid vasodilation extends along the full extent of the parasympathetic parvicellular reticular region in the rat brainstem2021

    • Author(s)
      Takemoto Yumi
    • Journal Title

      Autonomic Neurosciences

      Volume: 232 Pages: 102786-102786

    • DOI

      10.1016/j.autneu.2021.102786

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Parasympathetic brainstem origin sites of triggered external and internal carotid vasodilation are not distributed topographically in the rat2021

    • Author(s)
      Takemoto Yumi
    • Journal Title

      Neuroscience Letters

      Volume: 755 Pages: 135904-135904

    • DOI

      10.1016/j.neulet.2021.135904

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Muscle vasodilator response via potential adrenaline secretion to L-cysteine microinjected in rostral ventrolateral medulla of rats2020

    • Author(s)
      Takemoto Yumi
    • Journal Title

      Autonomic Neurosciences

      Volume: 224 Pages: 102644-102644

    • DOI

      10.1016/j.autneu.2020.102644

    • NAID

      120007002534

    • Related Report
      2020 Annual Research Report 2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Topographic carotid vasoconstriction in the rostral ventrolateral medulla of rats2020

    • Author(s)
      Takemoto Yumi
    • Journal Title

      Autonomic Neurosciences

      Volume: 229 Pages: 102720-102720

    • DOI

      10.1016/j.autneu.2020.102720

    • NAID

      120007182889

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Microinjections of an ionotropic excitatory amino acid receptors activator L-cysteine identified a parasympathetic carotid vasodilator response zone that spans the rat brainstem?2020

    • Author(s)
      Takemoto Yumi
    • Journal Title

      The Journal of Physiological Sciences

      Volume: 70 (s1)

    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Journal Article] Mapping of hindquarter resistance responses to stimulation with glutamate or an ionotropic excitatory amino acid candidate L-cysteine in the rat ventrolateral medulla.2018

    • Author(s)
      Takemoto Yumi
    • Journal Title

      The Journal of Physiological Sciences

      Volume: 68(s1)

    • Related Report
      2018 Research-status Report
  • [Presentation] Glutamate stimulation of the pre-sympathetic RVLM pressor area produces hindlimb vasodilation in baroreceptor-denervated rats2020

    • Author(s)
      Takemoto Yumi
    • Organizer
      39th Annual Meeting of the Japan Neuroscience Society 2016
    • Related Report
      2020 Annual Research Report
  • [Presentation] Muscle blood flow responses mapped in the rat autonomic ventrolateral medulla areas with microinjections of an ionotropic excitatory amino acid L-cysteine2020

    • Author(s)
      Takemoto Yumi
    • Organizer
      The International Society for Autonomic Neuroscience 2017
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Mapping of hindquarter resistance responses to stimulation with glutamate or an ionotropic excitatory amino acid candidate L-cysteine in the rat ventrolateral medulla2020

    • Author(s)
      Takemoto Yumi
    • Organizer
      95th Annual Meeting of the Physiological Society of Japan 2018
    • Related Report
      2020 Annual Research Report
  • [Presentation] L-Cysteine's carotid flow responses mapped in pre-sympathetic areas of the rat ventral medulla2020

    • Author(s)
      Takemoto Yumi
    • Organizer
      9the Federation of the Asian and Oceanian Physiological Society 2019
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Carotid flow responses to L-cysteine mapped in the partially carotid-denervated rat ventral medulla2020

    • Author(s)
      Takemoto Yumi
    • Organizer
      11th Congress of the international society for autonomic neuroscience 2019
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Microinjections of an ionotropic excitatory amino acid receptors activator L-cysteine identified a parasympathetic carotid vasodilator response zone that spans the rat brainstem?2020

    • Author(s)
      Takemoto Yumi
    • Organizer
      97th Annual Meeting of the Physiological Society of Japan
    • Related Report
      2020 Annual Research Report 2019 Research-status Report
  • [Presentation] L-Cysteine's carotid flow responses mapped in pre-sympathetic areas of the rat ventral vedulla2019

    • Author(s)
      Takemoto Yumi
    • Organizer
      96th Annual Meeting of the Physiological Society of Japan and 9th FAOPS (Federation of the Asian and Oceanian Physiological Society) Congress
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Carotid flow responses to L-cysteine mapped in the partially carotid-denervated rat ventral meculla2019

    • Author(s)
      Takemoto Yumi
    • Organizer
      11th Congress of the international society for autonomic neuroscience
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] L-Cystein's carotid flow responses mapped in pre-sympathetic areas of the rat ventral medulla2019

    • Author(s)
      Takemoto Yumi
    • Organizer
      96th Annual Meeting of the Physiological Society of Japan and 9th FAOPS (Federation of the Asian and Oceanian Physiological Society) congress
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2022-01-27  

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