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The molecular mechanism of direct cardiotoxicity of cannabinoid, and the effect of ethanol

Research Project

Project/Area Number 19K19483
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 58040:Forensics medicine-related
Research InstitutionThe University of Tokyo (2020-2022)
Tokyo Medical and Dental University (2019)

Principal Investigator

Noritake Kanako  東京大学, 大学院医学系研究科(医学部), 特任研究員 (40758067)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
KeywordsΔ9-THC / ERストレス / マクロピノサイトーシス / AMPK / 心筋細胞 / エタノール / 小胞体ストレス / Δ9-テトラヒドロカンナビノール / 毒性機序
Outline of Research at the Start

現在、世界で最も乱用されている違法薬物である大麻の主要活性成分Δ9-テトラヒドロカンナビノール(THC)には、認知機能障害や心筋梗塞などの心血管疾患の発症リスクがあることが報告されているが、それらのメカニズムは明らかとなっていない。本研究では、大麻草由来のTHCを用いて、THC毒性の分子機構を明らかにすることを目的とする。合わせて、申請者がこれまで研究対象としてきたアルコールは、大麻と併用して摂取されることが多いことから、THCの毒性との相互作用についても検討を行う。

Outline of Final Research Achievements

Δ9-tetrahydrocannabinol (Δ9-THC), the major psychoactive constituent of marijuana, has been reported to induce adverse effects on the cardiovascular system, including arrhythmias and myocardial infarctions. The aim of this study is to examine the mechanism of direct cardiotoxicity of Δ9-THC. Alcohol (ethanol) can increase the risk of developing cardiovascular disease caused by Δ9-THC; therefore, the effect of ethanol on Δ9-THC cytotoxicity was also examined. Δ9-THC induced apoptosis caused by ER stress in HL-1 murine cardiomyocyte. We also observed cytoplasmic vacuolization through enhanced macropinocytosis, a process involved in the uptake of extracellular fluids including nutrients. Moreover Δ9-THC activated AMPK, a sensor of intracellular energy status and an activator of macropinocytosis. AMPK activation involved not only in the induction of macropinocytosis but also in cytoprotection against Δ9-THC cytotoxicity.

Academic Significance and Societal Importance of the Research Achievements

近年、世界的に大麻乱用者は増加しているが、大麻使用による身体への影響について科学的証明は十分されていないのが現状である。本研究では、Δ9-THCの心毒性の発現機構を分子レベルで明らかにしたことで、大麻使用にリスクが伴う可能性があることを認識する一助となると考える。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (5 results)

All 2022 2021 2020 2019

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Possible roles of AMPK and macropinocytosis in the defense responses against Δ9-THC toxicity on HL-1 cardiomyocytes2021

    • Author(s)
      Murata Tatsuhiko、Noritake Kanako、Aki Toshihiko、Uemura Koichi
    • Journal Title

      Toxicology Reports

      Volume: 8 Pages: 980-987

    • DOI

      10.1016/j.toxrep.2021.04.014

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Pyroptotic cell death by exposure to 1-butanol in H9c2 cardiomyoblastoma cells2020

    • Author(s)
      Kanako Noritake , Toshihiko Aki , Shintaro Isa , Koichi Uemura
    • Journal Title

      Heliyon

      Volume: 6 Issue: 11 Pages: e05503-e05503

    • DOI

      10.1016/j.heliyon.2020.e05503

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Fatal Intoxication with a mixture of para-methoxyamphetamine, N-ethylpentylone, and ketamine2022

    • Author(s)
      Kanako Noritake, Kanju Saka, Kana Unuma, Takeshi Funakoshi, Ruri Kikura-Hanajiri, Yohsuke Makino, Hirotaro Iwase, Koichi Uemura
    • Organizer
      59th meeting of The International Association of Forensic Toxicologists (TIAFT)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 大麻成分Δ9-THCとアルコールの心筋細胞への影響2020

    • Author(s)
      村田達彦, 則竹香菜子, 秋利彦, 上村公一
    • Organizer
      第55回日本アルコール・アディクション医学会学術総会
    • Related Report
      2020 Research-status Report
  • [Presentation] エタノール以外のアルコールによる細胞毒性研究2019

    • Author(s)
      則竹香菜子, 秋利彦, 上村公一
    • Organizer
      第55回日本アルコール・アディクション医学会学術総会
    • Related Report
      2019 Research-status Report
    • Invited

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Published: 2019-04-18   Modified: 2024-01-30  

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