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Study on intestinal absorption characteristics and nutrition/functionality of vitamin D

Research Project

Project/Area Number 16K00896
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Eating habits
Research InstitutionNational Agriculture and Food Research Organization

Principal Investigator

KOTAKE Eiichi  国立研究開発法人農業・食品産業技術総合研究機構, 食品研究部門, 上級研究員 (20547236)

Co-Investigator(Kenkyū-buntansha) 今場 司朗  国立研究開発法人農業・食品産業技術総合研究機構, 食品研究部門, 上級研究員 (20332273)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsビタミン / 腸管吸収 / 生体利用性 / 代謝産物 / ビタミンD / 機能性 / 抗ロコモーティブ症候群 / 吸収促進
Outline of Final Research Achievements

Vitamin D (VD) is activated in the liver and kidneys after intestinal absorption and exerts a trophic function. There is concern about locomotive syndrome caused by VD deficiency. In addition to well-known VD2 and VD3, VD4-VD7 were also examined for absorption characteristics and metabolism to improve absorption.
Depending on the type of VD, the absorption was lower than the others, but the absorption promoting effect by lysophospholipid was observed. An inhibitor experiment suggested, in part, absorption of the receptor pathway. In addition, the receptor knockout cells were prepared by genome editing but could not be subjected to experiments within the time frame. The metabolic and functions in liver and kidney models could not be examined within the time frame either, but the metabolite functions were simulated in PASS online.

Academic Significance and Societal Importance of the Research Achievements

VDはきのこ(VD2)と魚(VD3)、特定の食材からのみ摂取できる。菜食主義者ではVDが不足する他、日焼けや皮膚がんリスク低減のため、日光を避けているとVD3は不足する。また、コレステロール合成経路でVD3は生合成されるが、スタチンなどのコレステロール合成阻害剤を投与されている場合もVD3は不足する懸念がある。これらに対して本研究は、摂取機会を増やし、吸収量を向上させる食品加工技術開発につながる。
VD5,6,7については市販品が無いが、本研究では市販の植物ステロールを出発物質として、これらを合成できた。今後は安価に合成でき、試薬として学術研究にも使用されることが期待できる。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (2 results)

All 2017 2016

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (1 results) (of which Invited: 1 results)

  • [Journal Article] Bioavailability and Functions of Lipophilic Components of Food2017

    • Author(s)
      Eiichi Kotake-Nara
    • Journal Title

      Ann. Pharmacol. Pharm.

      Volume: 2 Pages: 1094-1094

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] カロテノイドの腸管吸収、代謝と機能2016

    • Author(s)
      小竹英一
    • Organizer
      農研機構食品研究部門研究成果展示会2016 第34回公開講演会
    • Place of Presentation
      つくば国際会議場(茨城県つくば市)
    • Related Report
      2016 Research-status Report
    • Invited

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Published: 2016-04-21   Modified: 2020-03-30  

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