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The mechanism of gastrin-releasing peptide system regulates male sexual functions and sexual behavior in rat brain.

Research Project

Project/Area Number 20K06722
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 44040:Morphology and anatomical structure-related
Research InstitutionKindai University (2022)
Okayama University (2020-2021)

Principal Investigator

Maejima Sho  近畿大学, 医学部, 助教 (10773286)

Co-Investigator(Kenkyū-buntansha) 坂本 浩隆  岡山大学, 自然科学学域, 准教授 (20363971)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords性行動 / 性機能 / 神経ネットワーク / ガストリン放出ペプチド / 神経科学 / 神経内分泌 / 神経ペプチド / ガストリン放出ペプチド受容体
Outline of Research at the Start

交尾行動や生殖器は多数の生理活性物質によって制御されている。その中でも、中枢神経系に発現するガストリン放出ペプチド(GRP)は、ラットにおいて脊髄レベルで勃起や射精といった雄の性機能を支配する神経ペプチドである。脳へ投射する脊髄GRPニューロン群は雄優位であることから、GRPは雄の交尾行動(性行動)の制御にも関与すると考えられる。本研究では、脳あるいは脊髄GRP系の性行動への関与やGRP系の活性に関わる神経回路および生理活性物質について解析することで、脊髄で性機能を支配するGRP系が、脳において性行動の制御に関与するかを脳-脊髄のGRP系の機能連関を着目して明らかにする。

Outline of Final Research Achievements

The function of gastrin-releasing peptide (GRP) in the medial preoptic area, the control center of sexual behavior, and the medial amygdala which is involved in female pheromone reception in male rats was examined. Los of function of GRP receptor-expressing neurons by receptor antagonist administration or toxin receptor-targeted cell disruption significantly attenuated sexual behavior and sexual functions, such as erection and ejaculation, and also decreased sexual preference to female odors. Histological analysis revealed that GRP neurons distributed in the suprachiasmatic nucleus and medial amygdala projected to the medial preoptic area. These results suggest that GRP systems, which regulates male sexual function in the spinal cord, is involved in the control of male sexual behavior in rat brain.

Academic Significance and Societal Importance of the Research Achievements

本研究により、脳におけるガストリン放出ペプチド(GRP)系が、雄の性行動を促進的に制御し、勃起や射精などの末梢性の性機能の調節にも関与することが明らかになった。GRP系はこれまで、消化管ホルモンとしてだけでなく、脊髄レベルで性機能の調節に関わることや、痒みを特異的に伝達する因子として機能することが報告されており、本研究による成果は脳内GRP系の新たな生理機能を示すものである。また、末梢において性機能を司るGRPが中枢においても同様の機能を有するという事実は、心因性勃起障害の発生機構やその治療法の確立などへの応用が期待でき、社会的貢献度も高いものと考えられる。

Report

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

    (9 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (6 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (1 results) Book (1 results)

  • [Int'l Joint Research] University of Oxford(英国)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Aquaporin regulates cell rounding through vacuole formation during endothelial-to-hematopoietic transition2023

    • Author(s)
      Sato Yuki、Shigematsu Mugiho、Shibata-Kanno Maria、Maejima Sho、Tamura Chie、Sakamoto Hirotaka
    • Journal Title

      Development

      Volume: preprint

    • DOI

      10.1101/2022.09.03.506460

    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Journal Article] Neuronal pentraxin 2 is required for facilitating excitatory synaptic inputs onto spinal neurons involved in pruriceptive transmission in a model of chronic itch2022

    • Author(s)
      Kanehisa Kensho、Koga Keisuke、Maejima Sho、Shiraishi Yuto、Asai Konatsu、Shiratori-Hayashi Miho、Xiao Mei-Fang、Sakamoto Hirotaka、Worley Paul F.、Tsuda Makoto
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 2367-2367

    • DOI

      10.1038/s41467-022-30089-x

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Nanobody-based RFP-dependent Cre recombinase for selective anterograde tracing in RFP-expressing transgenic animals2022

    • Author(s)
      Inutsuka Ayumu、Maejima Sho、Mizoguchi Hiroyuki、Kaneko Ryosuke、Nomura Rei、Takanami Keiko、Sakamoto Hirotaka、Onaka Tatsushi
    • Journal Title

      Communications Biology

      Volume: 5 Issue: 1 Pages: 979-979

    • DOI

      10.1038/s42003-022-03944-2

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Vasopressin-oxytocin?type signaling is ancient and has a conserved water homeostasis role in euryhaline marine planarians2022

    • Author(s)
      Kobayashi Aoshi、Hamada Mayuko、Yoshida Masa-aki、Kobayashi Yasuhisa、Tsutsui Naoaki、Sekiguchi Toshio、Matsukawa Yuta、Maejima Sho、Gingell Joseph J.、Sekiguchi Shoko、Hamamoto Ayumu、Hay Debbie L.、Morris John F.、Sakamoto Tatsuya、Sakamoto Hirotaka
    • Journal Title

      Science Advances

      Volume: 8 Issue: 9 Pages: 0311-0311

    • DOI

      10.1126/sciadv.abk0331

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Immunoelectron Microscopic Characterization of Vasopressin-Producing Neurons in the Hypothalamo-Pituitary Axis of Non-Human Primates by Use of Formaldehyde-Fixed Tissues Stored at ?25 °C for Several Years2021

    • Author(s)
      Otubo Akito、Maejima Sho、Oti Takumi、Satoh Keita、Ueda Yasumasa、Morris John F.、Sakamoto Tatsuya、Sakamoto Hirotaka
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 17 Pages: 9180-9180

    • DOI

      10.3390/ijms22179180

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Detection and Characterization of Estrogen Receptor Beta Expression in the Brain with Newly Developed Transgenic Mice2020

    • Author(s)
      Shoko Sagoshi, Sho Maejima, Masahiro Morishita, Satoshi Takenawa, Akito Otubo, Keiko Takanami, Tatsuya Sakamoto, Hirotaka Sakamoto, Shinji Tsukahara, Sonoko Ogawa
    • Journal Title

      Neuroscience

      Volume: 438 Pages: 182-197

    • DOI

      10.1016/j.neuroscience.2020.04.047

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 内側視索前野の性的二型核に発現するガストリン放出ペプチド系は雄ラットの性的活性を制御する2021

    • Author(s)
      前嶋 翔、野村 黎、高浪景子、坂本竜哉、坂本浩隆
    • Organizer
      第47回日本神経内分泌学会学術集会
    • Related Report
      2021 Research-status Report
  • [Book] カラー版 脳とホルモンの行動学 わかりやすい行動神経内分泌学 第2版2023

    • Author(s)
      近藤保彦 他
    • Total Pages
      364
    • Publisher
      西村書店
    • ISBN
      4867060437
    • Related Report
      2022 Annual Research Report

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

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