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The mechanisms of a novel hypothalamic small protein on fat accumulation in peripheral tissues

Research Project

Project/Area Number 19H03258
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 44040:Morphology and anatomical structure-related
Research InstitutionHiroshima University

Principal Investigator

Ukena Kazuyoshi  広島大学, 統合生命科学研究科(総), 教授 (10304370)

Co-Investigator(Kenkyū-buntansha) 岩越 栄子  広島大学, 統合生命科学研究科(総), 特任准教授 (50311296)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2021: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2020: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2019: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Keywords脂肪蓄積 / 視床下部 / 小タンパク質 / 白色脂肪組織 / 肝臓 / エネルギー消費 / 分泌性小タンパク質 / 摂食行動 / 受容体 / 遺伝子改変マウス / 脂肪組織 / 脂肪合成 / 末梢モルモン
Outline of Research at the Start

本研究課題では、我々が発見した新規脳因子(NPGLと命名)の脂肪蓄積作用の分子メカニズムを明らかにし、末梢組織での脂肪蓄積・合成を担う新しい中枢性制御機構を解明する研究を展開する。新規脳因子のNPGLは、80アミノ酸残基からなる分泌性小タンパク質であり、ラットとマウスを用いた解析により、NPGLは摂食促進やde novo脂肪合成を介して脂肪蓄積を促す作用を有することを見出している。本研究では、脂肪蓄積・合成の中枢性制御機構を解明するために、NPGLの標的作用部位・標的細胞、作用経路、ノックアウト動物、発現誘導因子、脂肪組織連関という5つの研究推進項目を効率よく展開する。

Outline of Final Research Achievements

In the previous study, we discovered a hypothalamic small protein (NPGL) and found that NPGL promoted food intake and fat accumulation in peripheral tissues of rats. In this study, we investigated the phenotypes produced by chronic intracerebroventricular administration of NPGL and the overexpression of the precursor gene in mice. Furthermore, we analyzed the differences in phenotypes under feeding conditions such as a normal diet, moderate-fat moderate-sucrose diet, and high-fat diet. On the other hand, for the purpose of more detailed analysis, we made genetically modified mice that can be activated/deactivated specifically for NPGL-producing cells in the hypothalamus.

Academic Significance and Societal Importance of the Research Achievements

動物における脂肪蓄積は、エネルギー貯蔵に加え、繁殖や生命維持に必要不可欠な生命現象である。これまで、脳因子による末梢組織での脂肪合成調節に関する研究は殆どない。一方、近年は飽食の時代であり、エネルギー代謝調節の破綻が生活習慣病の発症と密接に結びついている。本研究では、新たに見出した脳因子NPGL研究を通じ、生物学的見地から脂肪蓄積の分子メカニズムと生理学的意義の解明を目指した。多くの研究業績を得ることができ、動物の脂肪蓄積の制御メカニズムに新たな知見を加えることができた。

Report

(4 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (11 results)

All 2021 2020 2019

All Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 7 results,  Open Access: 5 results) Presentation (4 results) (of which Invited: 2 results)

  • [Journal Article] Effects of Overexpression of Neurosecretory Protein GL-Precursor Gene on Glucose Homeostasis and Insulin Sensitivity in Mice2021

    • Author(s)
      Fukumura Keisuke、Narimatsu Yuki、Moriwaki Shogo、Iwakoshi-Ukena Eiko、Furumitsu Megumi、Ukena Kazuyoshi
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 9 Pages: 4681-4681

    • DOI

      10.3390/ijms22094681

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of neurosecretory protein GL on food intake and fat accumulation under different dietary nutrient compositions in rats2021

    • Author(s)
      Fukumura Keisuke、Shikano Kenshiro、Narimatsu Yuaki、Iwakoshi-Ukena Eiko、Furumitsu Megumi、Naito Mana、Ukena Kazuyoshi
    • Journal Title

      Bioscience, Biotechnology, and Biochemistry

      Volume: zbab064 Issue: 6 Pages: 1514-1520

    • DOI

      10.1093/bbb/zbab064

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Adrenomedullin 2 and 5 activate the calcitonin receptor-like receptor (clr) – Receptor activity-modifying protein 3 (ramp3) receptor complex in Xenopus tropicalis2021

    • Author(s)
      Ogoshi M, Takahashi M, Aoyagi K, Ukena K, Aizawa S, Takeuchi H, Takahashi S, Takeuchi S.
    • Journal Title

      Gen Comp Endocrinol.

      Volume: 306 Pages: 113752-113752

    • DOI

      10.1016/j.ygcen.2021.113752

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of Irregular Feeding on the Daily Fluctuations in mRNA Expression of the Neurosecretory Protein GL and Neurosecretory Protein GM Genes in the Mouse Hypothalamus2021

    • Author(s)
      Kadota Atsuki、Iwakoshi-Ukena Eiko、Fukumura Keisuke、Shikano Kenshiro、Narimatsu Yuki、Furumitsu Megumi、Ukena Kazuyoshi
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 4 Pages: 2109-2109

    • DOI

      10.3390/ijms22042109

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of Chronic Intracerebroventricular Infusion of RFamide-Related Peptide-3 on Energy Metabolism in Male Mice2020

    • Author(s)
      Moriwaki Shogo、Narimatsu Yuki、Fukumura Keisuke、Iwakoshi-Ukena Eiko、Furumitsu Megumi、Ukena Kazuyoshi
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 21 Issue: 22 Pages: 8606-8606

    • DOI

      10.3390/ijms21228606

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Neurosecretory protein GL induces fat accumulation in mice.2020

    • Author(s)
      Shikano K, Iwakoshi-Ukena E, Saito T, Narimatsu Y, Kadota A, Furumitsu M, Bentley GE, Kriegsfeld LJ, Ukena K.
    • Journal Title

      J. Endocrinol.

      Volume: 244 Issue: 1 Pages: 1-12

    • DOI

      10.1530/joe-19-0112

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Neurosecretory protein GL induces fat accumulation in chicks.2019

    • Author(s)
      Shikano K, Iwakoshi-Ukena E, Kato M, Furumitsu M, Bentley GE, Kriegsfeld LJ, Ukena K.
    • Journal Title

      Front. Endocrinol.

      Volume: 10 Pages: 392-392

    • DOI

      10.3389/fendo.2019.00392

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 新規神経分泌因子の発見とその機能2021

    • Author(s)
      浮穴和義
    • Organizer
      第126回日本解剖学会総会・全国学術集会/第98回日本生理学会大会合同大会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 視床下部分泌性小タンパク質の脂肪蓄積作用2020

    • Author(s)
      福村圭介、成松勇樹、鹿野健史朗、齋藤鷹也、近藤邦裕、 古満芽久美、岩越栄子、浮穴和義
    • Organizer
      第5 回食欲・食嗜好の分子・神経基盤研究会
    • Related Report
      2020 Annual Research Report
  • [Presentation] エネルギー代謝調節に関わる新規神経ペプチドの発見と機能解析 ―鳥類と哺乳類の研究から―2019

    • Author(s)
      浮穴和義、岩越栄子
    • Organizer
      日本動物学会 第90回大阪大会 「第4回ペプチド・ホルモン研究会シンポジウム ~多様な動物種を用いたホルモン研究の新展開~」
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] マウスにおける視床下部分泌性小タンパク質NPGLの肥満誘導効果2019

    • Author(s)
      成松勇樹、門田惇希、岩越栄子、鹿野健史朗、古満芽久美、浮穴和義
    • Organizer
      第44 回日本比較内分泌学会及びシンポジウム
    • Related Report
      2019 Annual Research Report

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Published: 2019-04-18   Modified: 2024-01-30  

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