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Regulatory mechanism of cell amount by autonomic nerve signals

Research Project

Project/Area Number 22K19303
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 44:Biology at cellular to organismal levels, and related fields
Research InstitutionTohoku University

Principal Investigator

Imai Junta  東北大学, 医学系研究科, 准教授 (80431500)

Project Period (FY) 2022-06-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2023: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2022: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Keywords膵β細胞 / 細胞量制御
Outline of Research at the Start

臓器や組織の細胞は、環境や状況に応じ、最適な量に調節されている。たとえば、インス
リン産生細胞である膵β細胞は、肥満や妊娠などのインスリン需要増加に対応するために
増殖し増加する。一方、需要が低下すると元の量まで減少する。しかし、これらの際に細胞量が適切な量まで増加する機序や需要が低下した際の細胞量減少の機序は不明なままである。そこで、本研究提案では、膵β細胞や肝細胞を例に、増加-減少両面から、生体内で需要に応じて組織の細胞量が調節されるメカニズムを、自律神経やそれに制御された免疫系に着目して解明する。

Outline of Final Research Achievements

The amount of pancreatic β-cells increases compensatively due to increased insulin demand during pregnancy. On the other hand, the number of pancreatic β-cells returns to the original level after parturition, although the mechanism of this decrease was unknown. This researcher found that macrophages significantly infiltrate islets after parturition, and that inhibiting macrophage infiltration suppresses the decrease in pancreatic β-cell volume after parturition and prevents it from returning to the original levels. Further research on this topic revealed several key molecules for this mechanism of macrophage infiltration of postnatal pancreatic islets, as well as the mechanism by which macrophages are involved in the decrease in postnatal pancreatic β-cells. These results have been published in a scientific journal Developmental Cell (2023;58: 1819-1829).

Academic Significance and Societal Importance of the Research Achievements

本研究によって、体の状況に応じて膵β細胞の数が調節され、血糖値が正常に保たれる仕組みが明らかになった。一方、多くの糖尿病は膵β細胞の数が減ることによって発症することから、今回明らかになった膵β細胞を減らす仕組みが必要以上に働いてしまうと糖尿病の発症につながる可能性も考えられる。これらの関連について研究を進めることで糖尿病の予防法・治療法の開発につながることが期待される。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (17 results)

All 2024 2023 2022 Other

All Journal Article (11 results) (of which Peer Reviewed: 11 results,  Open Access: 9 results) Presentation (4 results) (of which Invited: 4 results) Remarks (2 results)

  • [Journal Article] A Multicenter, Open-Label, Single-Arm Trial of the Efficacy and Safety of Empagliflozin Treatment for Refractory Diabetes Mellitus with Insulin Resistance (EMPIRE-01)2024

    • Author(s)
      Hirota Yushi、Kakei Yasumasa、Imai Junta、Katagiri Hideki、Ebihara Ken、Wada Jun、Suzuki Junichi、Urakami Tatsuhiko、Omori Takashi、Ogawa Wataru
    • Journal Title

      Diabetes Therapy

      Volume: 15 Issue: 2 Pages: 533-545

    • DOI

      10.1007/s13300-023-01526-x

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Phagocytosis by macrophages promotes pancreatic β cell mass reduction after parturition in mice2023

    • Author(s)
      Endo Akira、Imai Junta、Izumi Tomohito、Kawana Yohei、Sugawara Hiroto、Kohata Masato、Seike Junro、Kubo Haremaru、Komamura Hiroshi、Sato Toshihiro、Asai Yoichiro、Hosaka Shinichiro、Kodama Shinjiro、Takahashi Kei、Kaneko Keizo、Katagiri Hideki
    • Journal Title

      Developmental Cell

      Volume: 58 Issue: 19 Pages: 1819-1829.e5

    • DOI

      10.1016/j.devcel.2023.08.002

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A highly sensitive strategy for monitoring real-time proliferation of targeted cell types in vivo2023

    • Author(s)
      Sugawara Hiroto、Imai Junta、Yamamoto Junpei、Izumi Tomohito、Kawana Yohei、Endo Akira、Kohata Masato、Seike Junro、Kubo Haremaru、Komamura Hiroshi、Munakata Yuichiro、Asai Yoichiro、Hosaka Shinichiro、Sawada Shojiro、Kodama Shinjiro、Takahashi Kei、Kaneko Keizo、Katagiri Hideki
    • Journal Title

      Nature Communications

      Volume: 14 Issue: 1 Pages: 3253-3253

    • DOI

      10.1038/s41467-023-38897-5

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Inter-organ insulin-leptin signal crosstalk from the liver enhances survival during food shortages2023

    • Author(s)
      Takahashi Kei、Yamada Tetsuya、Hosaka Shinichiro、Kaneko Keizo、Asai Yoichiro、Munakata Yuichiro、Seike Junro、Horiuchi Takahiro、Kodama Shinjiro、Izumi Tomohito、Sawada Shojiro、Hoshikawa Kyoko、Inoue Jun、Masamune Atsushi、Ueno Yoshiyuki、Imai Junta、Katagiri Hideki
    • Journal Title

      Cell Reports

      Volume: 42 Issue: 5 Pages: 112415-112415

    • DOI

      10.1016/j.celrep.2023.112415

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A case of fulminant type 1 diabetes and protein C deficiency complicated by deep vein thrombosis2023

    • Author(s)
      Kohata Masato、Kodama Shinjiro、Yaoita Nobuhiro、Hosaka Shinichiro、Takahashi Kei、Kaneko Keizo、Imai Junta、Yasuda Satoshi、Katagiri Hideki
    • Journal Title

      Journal of Diabetes Investigation

      Volume: 14 Issue: 8 Pages: 1005-1008

    • DOI

      10.1111/jdi.14020

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Identification of islet cell characteristics in humans with type2 diabetes by single‐cell sequencing2022

    • Author(s)
      Imai Junta
    • Journal Title

      Journal of Diabetes Investigation

      Volume: 13 Issue: 10 Pages: 1646-1648

    • DOI

      10.1111/jdi.13833

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Type 1 Diabetes Mellitus Associated with Nivolumab after Second SARS-CoV-2 Vaccination, Japan2022

    • Author(s)
      Sato Toshihiro、Kodama Shinjiro、Kaneko Keizo、Imai Junta、Katagiri Hideki
    • Journal Title

      Emerging Infectious Diseases

      Volume: 28 Issue: 7 Pages: 1518-1520

    • DOI

      10.3201/eid2807.220127

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Roles of FoxM1-driven basal β-cell proliferation in maintenance of β-cell mass and glucose tolerance during adulthood2022

    • Author(s)
      Kohata Masato、Imai Junta、Izumi Tomohito、Yamamoto Junpei、Kawana Yohei、Endo Akira、Sugawara Hiroto、Seike Junro、Kubo Haremaru、Komamura Hiroshi、Sato Toshihiro、Hosaka Shinichiro、Munakata Yuichiro、Asai Yoichiro、Kodama Shinjiro、Takahashi Kei、Kaneko Keizo、Katagiri Hideki
    • Journal Title

      Journal of Diabetes Investigation

      Volume: 13 Issue: 10 Pages: 1666-1676

    • DOI

      10.1111/jdi.13846

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Two cases with fulminant type 1 diabetes that developed long after cessation of immune checkpoint inhibitor treatment2022

    • Author(s)
      Hatayama Satoko、Kodama Shinjiro、Kawana Yohei、Otake Sonoko、Sato Daiki、Horiuchi Takahiro、Takahashi Kei、Kaneko Keizo、Imai Junta、Katagiri Hideki
    • Journal Title

      Journal of Diabetes Investigation

      Volume: 13 Issue: 8 Pages: 1458-1460

    • DOI

      10.1111/jdi.13807

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Insulin-like growth factor-1 levels are associated with high comorbidity of metabolic disorders in obese subjects; a Japanese single-center, retrospective-study2022

    • Author(s)
      Kubo Haremaru、Sawada Shojiro、Satoh Michihiro、Asai Yoichiro、Kodama Shinjiro、Sato Toshihiro、Tomiyama Seitaro、Seike Junro、Takahashi Kei、Kaneko Keizo、Imai Junta、Katagiri Hideki
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 1-9

    • DOI

      10.1038/s41598-022-23521-1

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Insulin allergy manifesting soon after COVID‐19 vaccination (BNT162b2)2022

    • Author(s)
      Komamura Hiroshi、Kawana Yohei、Imai Junta、Katagiri Hideki
    • Journal Title

      Journal of Diabetes Investigation

      Volume: 14 Issue: 3 Pages: 498-499

    • DOI

      10.1111/jdi.13969

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Vagal nerve signal-mediated regulation of pancreatic β cells2023

    • Author(s)
      Junta Imai
    • Organizer
      第100回 日本生理学会記念大会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 今後100年を見据えたインスリン治療の未来像2022

    • Author(s)
      今井 淳太
    • Organizer
      第65回日本糖尿病学会年次学術集会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 肥満モデル動物を用いた神経シグナルによる膵β細胞増殖機構の解明2022

    • Author(s)
      今井 淳太
    • Organizer
      第35回日本糖尿病・肥満動物学会年次学術集会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 肝臓からの代謝情報内受容を介した膵β細胞制御による糖代謝恒常性維持機構2022

    • Author(s)
      今井 淳太
    • Organizer
      第96回日本薬理学会年会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Remarks] 東北大学大学院医学系研究科 糖尿病代謝・内分泌内科学分野

    • URL

      http://www.diabetes.med.tohoku.ac.jp/

    • Related Report
      2023 Annual Research Report
  • [Remarks] 東北大学大学院医学系研究科 糖尿病代謝内科学分野

    • URL

      http://www.diabetes.med.tohoku.ac.jp/

    • Related Report
      2022 Research-status Report

URL: 

Published: 2022-07-05   Modified: 2025-01-30  

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