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Exploring novel bioactivities of dietary components by focusing on qualitative changes in lipoproteins

Research Project

Project/Area Number 19K22797
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 59:Sports sciences, physical education, health sciences, and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Yamanashi Yoshihide  東京大学, 医学部附属病院, 助教 (20582018)

Project Period (FY) 2019-06-28 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2019: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
KeywordsVLDL / LDL / S1P / スフィンゴミエリン / NPC1L1 / リポ蛋白質 / 動脈硬化症
Outline of Research at the Start

近年、動脈硬化症などの疾患発症リスクとの関連から、リポ蛋白質の「量(血液中濃度)」に加えて、「質(生理活性の強さ)」の重要性が明らかとなりつつある。また、リポ蛋白質が様々な食成分(栄養素や薬物)を包含し、それらの運搬体として機能することも見出されている。本研究は、食成分のリポ蛋白質への分布に着目し、食成分がリポ蛋白質の「質」に及ぼす影響を明らかにすべく企画された。得られる成果は、食成分の新たな生理活性や毒性の発見に繋がるとともに、リポ蛋白質の「質」の改善をねらう全く新しい食事療法や創薬コンセプトの提唱にも繋がり、生活習慣病の治療や予防に大きく貢献することが期待される。

Outline of Final Research Achievements

Comprehensive analyses of lipoprotein components in mice revealed that VLDL/LDL-associated sphingosine-1-phosphate (S1P) was increased by feeding a high-fat diet (HFD). Interestingly, this increase was abolished in mice genetically deficient NPC1L1, an intestinal cholesterol importer, and in mice treated with ezetimibe, an NPC1L1 inhibitor. Since S1P is a metabolite of sphingomyelin (SM), which is abundant in HFD, we hypothesized that NPC1L1 is involved in intestinal SM absorption. To test this possibility, we conducted a series of in vitro and in vivo experiments and revealed that SM is a physiological substrate of NPC1L1 and its intestinal absorption is regulated by an ezetimibe-sensitive and NPC1L1-dependent pathway.

Academic Significance and Societal Importance of the Research Achievements

コレステロール吸収輸送体であるNPC1L1がSMの消化管吸収にも関わり、血液中のVLDL/LDL-S1Pレベルを制御することが示唆された。これらの成果はスフィンゴ脂質の恒常性維持におけるNPC1L1の新たな生理的役割を明らかにした点で、また、食事依存的なVLDL/LDLの構成成分の変化にNPC1L1が関わる可能性を見出した点で、生理学的・栄養学的に重要な知見である。

Report

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

    (8 results)

All 2021 2020 2019 Other

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

  • [Journal Article] NPC1L1 Facilitates Sphingomyelin Absorption and Regulates Diet-Induced Production of VLDL/LDL-associated S1P2020

    • Author(s)
      Yamanashi Yoshihide、Takada Tappei、Yamamoto Hideaki、Suzuki Hiroshi
    • Journal Title

      Nutrients

      Volume: 12 Issue: 9 Pages: 2641-2641

    • DOI

      10.3390/nu12092641

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Translational Research Based on Understanding the Regulatory Mechanisms of <i>in Vivo</i> Behaviors of Fat-soluble Compounds2019

    • Author(s)
      Yamanashi Yoshihide
    • Journal Title

      YAKUGAKU ZASSHI

      Volume: 139 Issue: 12 Pages: 1485-1494

    • DOI

      10.1248/yakushi.19-00136

    • NAID

      130007754066

    • ISSN
      0031-6903, 1347-5231
    • Year and Date
      2019-12-01
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Niemann‐Pick C1‐like 1 Promotes Intestinal Absorption of Siphonaxanthin2019

    • Author(s)
      Manabe Yuki、Ichihara Misato、Fukuda Kyoko、Tomonaga Nami、Li Zhuo‐Si、Yamanashi Yoshihide、Suzuki Hiroshi、Takada Tappei、Matsuo Michinori、Sugawara Tatsuya
    • Journal Title

      Lipids

      Volume: 54 Issue: 11-12 Pages: 707-714

    • DOI

      10.1002/lipd.12194

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Pathophysiological importance of bile cholesterol reabsorption: hepatic NPC1L1-exacerbated steatosis and decreasing VLDL-TG secretion in mice fed a high-fat diet2019

    • Author(s)
      Toyoda Yu、Takada Tappei、Yamanashi Yoshihide、Suzuki Hiroshi
    • Journal Title

      Lipids in Health and Disease

      Volume: 18 Issue: 1

    • DOI

      10.1186/s12944-019-1179-0

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] NPC1L1によるスフィンゴミエリンの消化管吸収とVLDL/LDL-S1Pの産生制御2021

    • Author(s)
      山梨義英、高田龍平、山本英明、鈴木洋史
    • Organizer
      日本薬学会 第141年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 肝臓に発現するNPC1L1は西欧食誘発性の動脈硬化症をエゼチミブ感受的に増悪させる2019

    • Author(s)
      山梨 義英、高田 龍平、山本 英明、慕 爽、田中 悠介、小峰 瞳子、鈴木 洋史
    • Organizer
      第13回 次世代を担う若手医療薬科学シンポジウム
    • Related Report
      2019 Research-status Report
  • [Remarks] 自己紹介(研究室ホームページ内)

    • URL

      https://plaza.umin.ac.jp/~todaiyak/yamaanshi,php

    • Related Report
      2020 Annual Research Report
  • [Remarks] 自己紹介(研究室ホームページ内)

    • URL

      https://plaza.umin.ac.jp/~todaiyak/yamanashi.php

    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-07-04   Modified: 2022-01-27  

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