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Identification of novel equilibrative oligopeptide transporters that may regulate drug absorption in the gastrointestinal tract

Research Project

Project/Area Number 21K06694
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 47060:Clinical pharmacy-related
Research InstitutionTokyo University of Pharmacy and Life Science

Principal Investigator

Higuchi Kei  東京薬科大学, 薬学部, 講師 (10625304)

Co-Investigator(Kenkyū-buntansha) 井上 勝央  東京薬科大学, 薬学部, 教授 (50315892)
岸本 久直  東京薬科大学, 薬学部, 講師 (80723600)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsオリゴペプチドトランスポーター / 消化管 / 側底膜 / 小腸上皮細胞 / トランスポーター / 促進拡散
Outline of Research at the Start

本研究では、小腸上皮細胞でPEPT1と共役し、側底膜でオリゴペプチド類似構造薬物の細胞膜透過を担うトランスポーターの分子実体を解明する。本計画では、申請者が見出した新規オリゴペプチドトランスポーター(EOPT1)とそのアイソフォームに着目する。EOPT1とそのアイソフォームのオリゴペプチド類似構造体の輸送特性を独自のin vitro発現系実験で明らかにし、さらに消化管でのそれらの膜透過への寄与をin vivo実験で検証する。得られる成果は、既存のオリゴペプチド類似構造薬物だけでなく、今後開発が進む経口ペプチド製剤の吸収動態予測に重要な知見となりうる。

Outline of Final Research Achievements

Drug absorption from the gastrointestinal tract is regulated by the cell membrane permeability of the gastrointestinal epithelium. This study aims to identify novel equilibrative oligopeptide transporters (EOPTs) that express at the basolateral membrane of gastrointestinal epithelial cells and play a role in drug absorption. Therefore, we examined the transport function of a group of candidate molecules of EOPTs previously identified as novel oligopeptide transporters. As a result, candidates like EOPT1 and EOPT2 can transport oligopeptides and peptidomimetics. These molecules are expressed at the basolateral membrane of a polarized gastrointestinal epithelial cell line. When the model cells are cultured on the cell culture inserts, the expression of EOPT2 enhances the permeation of the substrate from the apical to the basal side. Some of these results have already been published in an international journal article.

Academic Significance and Societal Importance of the Research Achievements

本成果である小腸上皮細胞側底膜で機能する新規オリゴペプチドトランスポーターの同定は、生理的なオリゴペプチドの吸収機構を明らかにするという点で、栄養生理学的にも重要な意義があるだけでなく、消化管からのβ-ラクタム系抗生物質などの薬物の吸収動態の新規制御因子の同定という価値がある。オリゴペプチドを認識するトランスポーターの同定は創薬・創剤において、経口吸収性を高める上で有益であることから、近年着目されている経口ペプチド創薬・創剤においても重要な知見となりうると考えられる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (7 results)

All 2024 2023 2022

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] Monocarboxylate Transporter 13 (MCT13/SLC16A13) Functions as a Novel Plasma Membrane Oligopeptide Transporter2023

    • Author(s)
      Higuchi K, Kunieda M, Sugiyama K, Tomabechi R, Kishimoto H, Inoue K
    • Journal Title

      Nutrients

      Volume: 15 Issue: 16 Pages: 3527-3527

    • DOI

      10.3390/nu15163527

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 乳がんに高発現する新規抗がん剤耐性トランスポーター2024

    • Author(s)
      國枝 美里、樋口 慧、大塚 唯斗、岸本 久直、井上 勝央
    • Organizer
      日本薬学会144年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] アクセサリータンパク質によるSlc16a6/MCT7機能制御2023

    • Author(s)
      樋口 慧、國枝 美里、岸本 久直、井上 勝央
    • Organizer
      第67回日本薬学会関東支部大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 新規薬剤開発および薬物療法を目指した 生体内代謝物トランスポーターの機能解析2023

    • Author(s)
      樋口 慧
    • Organizer
      第67回日本薬学会関東支部大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Methotrexate resistance by Slc16a6/MCT7 in cancer cells2023

    • Author(s)
      Misato Kunieda, Yuito Otsuka, Kei Higuchi, Hisanao Kishimoto, Katsuhisa Inoue
    • Organizer
      2023 International Joint Meeting of the 23rd International Conference on Cytochrome P450 and the 38th Annual Meeting of the Japanese Society for the Study of Xenobiotics
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Regulation of localization and function of MCT7 by ancillary proteins CD147 and GP702023

    • Author(s)
      Kei Higuchi, Misato Kunieda, Hisanao Kishimoto, Katsuhisa Inoue
    • Organizer
      2023 International Joint Meeting of the 23rd International Conference on Cytochrome P450 and the 38th Annual Meeting of the Japanese Society for the Study of Xenobiotics
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Na+依存性オリゴペプチドトランスポーターを介したβ-amyloid輸送の可能性2022

    • Author(s)
      樋口 慧, V Ganapathy
    • Organizer
      日本薬剤学会第37年会
    • Related Report
      2022 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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