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Investigation of cause of sudden death associated with hypomagnesemia and examination of usefulness of magnesium replacement therapy

Research Project

Project/Area Number 15K00846
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Eating habits
Research InstitutionJuntendo University

Principal Investigator

Watanabe Makino  順天堂大学, 医学部, 准教授 (00255655)

Co-Investigator(Kenkyū-buntansha) 家崎 貴文  順天堂大学, 医学部, 先任准教授 (10348956)
中村 京子  順天堂大学, 医学部, 助教 (90578858)
Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords低マグネシウム血症 / 突然死 / ミトコンドリア / マグネシウム補充 / 貧血 / 脚気 / 脚気衝心 / Ca2+感受性 / 心機能 / 血管平滑筋収縮機能 / 心エコー / Mg補充 / ミトコンドリア透過性遷移孔
Outline of Final Research Achievements

To investigate the cause of sudden death by chronic magnesium (Mg) deficient (hypomagnesemia), we prepared the chronic Mg deficient rats, and it was also examined whether Mg supplementation was effective for preventing sudden death. The present study revealed that cardiac dysfunction and anemia observed in chronic magnesium-deficient rats are completely improved by Mg supplementation after hypomagnesemia.
On the other hand, pleural effusion and limb edema observed in chronic Mg deficiency are similar in symptoms to beriberi that is vitamin B1 deficiency. Beriberi also develops heart failure symptoms called beriberi heart, suggesting the possibility of beriberi as a cause of sudden death associated with hypomagnesemia, which needs further investigation.

Academic Significance and Societal Importance of the Research Achievements

本研究により、慢性的なMg欠乏によって発症した低マグネシウム血症、貧血、心機能畏怖全は、発症後であっても充分量のMgを医薬品やサプリメント等で補うことによって完全に改善しうることが明らかとなった。
一方で、当初、低マグネシウム血症と心機能の関連を検討していたが、研究を進める中で低マグネシウム血症によって、脚気様の症状が引き起こされることが明らかとなった。低マグネシウム血症と脚気(ビタミンB1欠乏症)の関連は明らかになっていないが、本邦における所得貧困層や高齢者の買い物難民などによる低栄養状況が突然死を引き起こす原因になり得ることが示唆された。

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (6 results)

All 2018 2017 2016 2015

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

  • [Journal Article] Langendorff Perfusion Method as an Ex Vivo Model to Evaluate Heart Function in Rats2018

    • Author(s)
      Watanabe Makino、Okada Takao
    • Journal Title

      Methods in Molecular Biology

      Volume: 1816 Pages: 107-116

    • DOI

      10.1007/978-1-4939-8597-5_8

    • ISBN
      9781493985968, 9781493985975
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] Magnesium Deficiency Attenuates Vascular Smooth Muscle Contraction in Rat Aorta2018

    • Author(s)
      Takafumi Iesaki, Ryo Kakigi, Makino Watanabe
    • Organizer
      Experimental Biology 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Functional evaluation of myocardium mitochondria in magnesium deficient rat2018

    • Author(s)
      Yuya Ohe, Yuuki Yachida, Ryota Hashimoto, Kyoko Nakamura, Takafumi Iesaki, Makino Watanabe
    • Organizer
      第95回日本生理学会大会
    • Related Report
      2017 Research-status Report
  • [Presentation] マグネシウム欠乏ラットにおける血管平滑筋収縮の抑制の機序2017

    • Author(s)
      宮内翼、竹田安里彩、渡邉マキノ、岡田隆夫、家崎貴文
    • Organizer
      第90回日本薬理学会年会
    • Place of Presentation
      長崎
    • Year and Date
      2017-03-15
    • Related Report
      2016 Research-status Report
  • [Presentation] Magnesium deficiency inhibits both voltage-gated and receptor-operated vascular smooth muscle contraction.2016

    • Author(s)
      Yuki Iwamoto, Shigetaka Fukuda, Shinya Fujioka, Makino Watanabe, Takao Okada, Takafumi Iesaki
    • Organizer
      第93回日本生理学会大会
    • Place of Presentation
      札幌コンベンションセンター
    • Year and Date
      2016-03-23
    • Related Report
      2015 Research-status Report
  • [Presentation] 慢性Mg欠乏ラット心臓における低酸素耐性の低下とMg補充効果の検討2015

    • Author(s)
      渡邉マキノ、柿木亮、中村京子、華藤恵美、家崎貴文、岡田隆夫
    • Organizer
      第25回日本病態生理学会
    • Place of Presentation
      愛媛大学城北キャンパス
    • Year and Date
      2015-08-01
    • Related Report
      2015 Research-status Report

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Published: 2015-04-16   Modified: 2020-03-30  

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