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Elucidation of the mechanisms of vagal signal-mediated organ and tissue mass regulation and its therapeutic application

Research Project

Project/Area Number 20K17525
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 54040:Metabolism and endocrinology-related
Research InstitutionTohoku University

Principal Investigator

IZUMI Tomohito  東北大学, 医学系研究科, 大学院非常勤講師 (80747064)

Project Period (FY) 2020-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywords膵β細胞 / 再生医療 / 自律神経 / 臓器間ネットワーク
Outline of Research at the Start

生体内の細胞を増殖させることでその機能を回復させる再生治療は、多くの疾患に対して有望な治療法である。糖尿病はインスリン分泌細胞である膵β細胞の減少が基盤となっており、また肝臓は旺盛な再生能を有しているものの、その大部分を切除するような手術後の予後は決して良好とは言えない。本研究は、我々がこれまで見出してきた神経シグナルによる細胞増殖誘導について、詳細なメカニズムの解明や動物モデルに対する応用を進めることで、膵β細胞や肝臓の増殖、再生を促進させるという新たな再生治療の開発を目指すものである。

Outline of Final Research Achievements

In this study, we conducted basic experiments to elucidate the mechanisms of cell proliferation by vagal signals and its therapeutic application. First, by comprehensive analysis of gene expression in mouse isolated islets treated with vagus-derived factors, we identified some candidate pathways. Next, by employing the technique of optogenetics, we found that continuous activation of vagal nerves in living mice successfully increased pancreatic β cell mass. We also performed experiments in which multiple factors that act as ligands for G protein-coupled receptors, similar to vagal factors, were loaded on isolated mouse islets, and found that some combinations of several factors could induce pancreatic islet cell proliferation. The above results are expected to lead to the development of regenerative treatment for diseases such as diabetes.

Academic Significance and Societal Importance of the Research Achievements

本研究では、研究代表者が所属するグループが見出した神経シグナルを介した細胞増殖誘導機構を応用することで、生体内あるいは生体外で標的となる細胞量を増加させることができることを示した。これらの成果は、膵β細胞が減少することにより発症する糖尿病をはじめとした、種々の疾患に対する再生治療の開発につながることが期待される。

Report

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

    (4 results)

All 2020

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

  • [Journal Article] Native Valve Endocarditis due to<i> Staphylococcus warneri</i> Developing in a Patient with Type 1 Diabetes2020

    • Author(s)
      Yamamoto Junpei、Endo Akira、Sugawara Hiroto、Izumi Tomohito、Takahashi Kenji、Yamamoto Saori、Akiyama Masatoshi、Adachi Osamu、Kaneko Keizo、Sawada Shojiro、Imai Junta、Saiki Yoshikatsu、Shimokawa Hiroaki、Katagiri Hideki
    • Journal Title

      Internal Medicine

      Volume: 59 Issue: 18 Pages: 2269-2274

    • DOI

      10.2169/internalmedicine.4661-20

    • NAID

      130007904758

    • ISSN
      0918-2918, 1349-7235
    • Year and Date
      2020-09-15
    • Related Report
      2020 Research-status Report
  • [Journal Article] Extraordinarily long-inactive solitary fibrous tumor transformed to produce big insulin-like growth factor-2, leading to hypoglycemia and rapid liposarcoma growth: a case report2020

    • Author(s)
      Kaneko Keizo、Sawada Shojiro、Satake Chihiro、Kondo Keiichi、Izumi Tomohito、Tanaka Mamiko、Imai Junta、Yamada Tetsuya、Katsushima Hiroki、Fujishima Fumiyoshi、Katagiri Hideki
    • Journal Title

      BMC Endocrine Disorders

      Volume: 20 Issue: 1 Pages: 148-148

    • DOI

      10.1186/s12902-020-00624-2

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Continuous glucose monitoring in patients with remission of type 2 diabetes after laparoscopic sleeve gastrectomy without or with duodenojejunal bypass2020

    • Author(s)
      Sawada Shojiro、Kodama Shinjiro、Tsuchiya Satoko、Kurosawa Satoko、Endo Akira、Sugawara Hiroto、Hosaka Shinichiro、Kawana Yohei、Asai Yoichiro、Yamamoto Junpei、Munakata Yuichiro、Izumi Tomohito、Takahashi Kei、Kaneko Keizo、Imai Junta、Imoto Hirofumi、Tanaka Naoki、Naitoh Takeshi、Ishigaki Yasushi、Katagiri Hideki
    • Journal Title

      Clinical Obesity

      Volume: 10 Issue: 6 Pages: 1-7

    • DOI

      10.1111/cob.12409

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Vascular resistance of carotid and vertebral arteries is associated with retinal microcirculation measured by laser speckle flowgraphy in patients with type 2 diabetes mellitus2020

    • Author(s)
      Sawada Shojiro、Tsuchiya Satoko、Kodama Shinjiro、Kurosawa Satoko、Endo Akira、Sugawara Hiroto、Hosaka Shinichiro、Kawana Yohei、Asai Yoichiro、Yamamoto Junpei、Munakata Yuichiro、Izumi Tomohito、Takahashi Kei、Kaneko Keizo、Imai Junta、Ito Azusa、Yasuda Masayuki、Kunikata Hiroshi、Nakazawa Toru、Katagiri Hideki
    • Journal Title

      Diabetes Research and Clinical Practice

      Volume: 165 Pages: 108240-108240

    • DOI

      10.1016/j.diabres.2020.108240

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access

URL: 

Published: 2020-04-28   Modified: 2023-01-30  

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