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Study of Pathogenic Mechanism of Oxidative Stress by Vitamin B12 Deficiency using Caenorhabditis elegans

Research Project

Project/Area Number 17K15270
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Food science
Research InstitutionTottori University

Principal Investigator

Bito Tomohiro  鳥取大学, 農学部, 助教 (20776421)

Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
KeywordsビタミンB12 / 酸化ストレス / 線虫 / Caenorhabditis elegans / 抗酸化物質 / 寿命 / 体内リズム / レドックス制御 / 老化
Outline of Final Research Achievements

To clarify the mechanism of vitamin B12 (B12)-deficient neuropathy that occurs frequently in elderly people, this study focused on the mechanism of oxidative stress disorder induced by B12 deficiency. Analysis using the model organism C. elegans revealed that B12 deficiency results in significant decrease in gene expression and enzyme activity of some antioxidant enzymes. From these results, it was inferred that the failure of antioxidant system is the cause of leading severe oxidative stress in B12 deficiency. In addition, as the results of studying the relationship between B12 deficiency and lifespan or aging, it became clear that a specific clock gene shows remarkable expression fluctuation.

Academic Significance and Societal Importance of the Research Achievements

ビタミンB12(B12)欠乏症で誘発される酸化ストレス障害は抗酸化システムが破綻することで生じることが推察された。酸化ストレスと神経疾患の関連性が数多く報告されていることから、B12欠乏性神経障害の要因としてB12欠乏で誘導される酸化ストレスが一因であることが挙げられ、その発症機構を部分的に解いたことの学術的意義は大きい。またB12欠乏症の酸化ストレスは抗酸化物質(グルタチオンやビタミンC)を供給することで解消されるが、この結果はB12欠乏症において多量の抗酸化物質を摂取することは、真のB12欠乏症の症状を覆い隠すことに繋がる。医療現場等において非常に重要な知見である。

Report

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

    (6 results)

All 2018 2017

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Vitamin B12 deficiency results in severe oxidative stress, leading to memory retention impairment in Caenorhabditis elegans2017

    • Author(s)
      Tomohiro Bito, Taihei Misaki, Yukinori Yabuta, Takahiro Ishikawa, Tsuyoshi Kawano, Fumio Watanabe
    • Journal Title

      Redox Biology

      Volume: 11 Pages: 21-29

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Investigating the function of vitamin B12 on lifespan2018

    • Author(s)
      Mayuka Oka, Tomohiro Bito, Fumio Watanabe
    • Organizer
      International Symposium on Agricultural, Food, Environmental and Life Sciences in Asia, 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ビタミンB12欠乏が線虫(Caenorhabditis elegans)の筋組織に及ぼす影響2018

    • Author(s)
      美藤友博, 真鍋若菜, 藪田行哲, 河野強, 渡邉文雄
    • Organizer
      日本ビタミン学会 第70回大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ビタミンB12欠乏が線虫(Caenorhabditis elegans)の筋組織に及ぼす影響2018

    • Author(s)
      美藤友博, 真鍋若菜, 薮田行哲, 河野強, 渡邉文雄
    • Organizer
      日本ビタミン学会第70回大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Cobalamin deficiency results in severe oxidative stress, leading to memory retention impairment in Caenorhabditis elegans2017

    • Author(s)
      Tomohiro Bito, Taihei Misaki, Yukinori Yabuta, Takahiro Ishikawa, Tsuyoshi Kawano, Fumio Watanabe
    • Organizer
      21st Internatinal C. elegans Coference
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] ビタミンB12の大量投与が線虫(Caenorhabditis elegans)の生殖機能に及ぼす影響2017

    • Author(s)
      美藤友博, 森脇涼, 北村有子, 薮田行哲, 河野強, 渡邉文雄
    • Organizer
      日本ビタミン学会第69回大会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2020-03-30  

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