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Genetic contribution of ALDH2 rs671 in alcohol-related carcinogenesis: an evaluation by mediation analysis

Research Project

Project/Area Number 19K19425
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 58020:Hygiene and public health-related: including laboratory approach
Research InstitutionAichi Cancer Center Research Institute

Principal Investigator

Koyanagi Yuriko  愛知県がんセンター(研究所), がん情報・対策研究分野, 主任研究員 (60825727)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords飲酒 / ALDH2 / がん / 媒介分析 / ALDH2遺伝子多型 / 飲酒関連がん / 消化管がん
Outline of Research at the Start

アルコールの代謝産物である発がん物質アセトアルデヒドは主にAldehyde dehydrogenase 2 (ALDH2)により代謝される。ALDH2遺伝子多型(Glu504Lys)の変異型アレルであるLysアレルは、その代謝活性をほぼ消失させ、飲酒後のアセトアルデヒド暴露量増加によって発がんリスクを上昇させる効果(直接効果)を示す。一方で、飲酒行動を抑制し発がんリスクを低下させる効果(間接効果)という相反する効果も示す。本研究では、これら2つの効果を区別して評価できる媒介分析により、Lysアレルの直接効果を定量化することで、各飲酒関連がんへのアセトアルデヒドの関与を臓器横断的に評価する。

Outline of Final Research Achievements

A genetic variant on aldehyde dehydrogenase 2 (ALDH2) rs671 (G>A) confers a protective effect against alcohol‐induced carcinogenesis through an indirect pathway mediated by decreased alcohol consumption. Conversely, this variant also contributes to the accumulation of carcinogenic agents, resulting in a direct carcinogenic effect. We used mediation analysis to successfully decompose the total effect of the rs671 A allele on digestive tract cancer risk into direct and indirect effects and determined the site‐specific impact of the carcinogenic direct effect as well as the site‐agnostic impact of the protective indirect effect. A pancreatic cancer case-control study using mediation analysis revealed the potential contribution of the rs671 A allele to pancreatic carcinogenesis through impaired metabolism of known or unknown ALDH2 substrates. Mediation analysis enabled us to shed new light on the mechanisms underlying the observed associations from the epidemiological point of view.

Academic Significance and Societal Importance of the Research Achievements

本研究のように、曝露(rs671多型のAアレル)とアウトカム(発がん)との間に中間因子(飲酒行動)が介在するモデルが想定される場合、媒介分析は曝露とアウトカムの間のメカニズムを明らかにするための一助となる優れた解析手法であり、疫学研究において従来よりも更に踏み込んだ議論ができるようになると期待される。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 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: 1 results) Presentation (3 results)

  • [Journal Article] New insights into the genetic contribution of ALDH2 rs671 in pancreatic carcinogenesis: evaluation by mediation analysis2022

    • Author(s)
      Yuriko N. Koyanagi, Isao Oze, Yumiko Kasugai, Yukino Kawakatsu, Yukari Taniyama, Kazuo Hara, Yasuhiro Shimizu, Issei Imoto, Hidemi Ito, Keitaro Matsuo
    • Journal Title

      Cancer Science

      Volume: 113 Issue: 4 Pages: 1441-1450

    • DOI

      10.1111/cas.15286

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Across-Site Differences in the Mechanism of Alcohol-Induced Digestive Tract Carcinogenesis: An Evaluation by Mediation Analysis2020

    • Author(s)
      Koyanagi Yuriko N.、Suzuki Etsuji、Imoto Issei、Kasugai Yumiko、Oze Isao、Ugai Tomotaka、Iwase Madoka、Usui Yoshiaki、Kawakatsu Yukino、Sawabe Michi、Hirayama Yutaka、Tanaka Tsutomu、Abe Tetsuya、Ito Seiji、Komori Koji、Hanai Nobuhiro、Tajika Masahiro、Shimizu Yasuhiro、Niwa Yasumasa、Ito Hidemi、Matsuo Keitaro
    • Journal Title

      Cancer Research

      Volume: 80 Issue: 7 Pages: 1601-1610

    • DOI

      10.1158/0008-5472.can-19-2685

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed
  • [Presentation] ALDH2遺伝子多型と飲酒の膵がんリスクへの影響:媒介分析による評価2021

    • Author(s)
      小柳友理子、春日井由美子、尾瀬功、谷山祐香里、伊藤秀美、松尾恵太郎
    • Organizer
      第80回日本癌学会学術総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ALDH2遺伝子多型の飲酒関連がん発がんリスク:媒介分析による評価2019

    • Author(s)
      小柳友理子
    • Organizer
      第42回日本がん疫学・分子疫学研究会総会
    • Related Report
      2019 Research-status Report
  • [Presentation] Differential impact of acetaldehyde among upper aerodigestive tract and gastric cancer risk: mediation analysis2019

    • Author(s)
      Yuriko Koyanagi, Yumiko Kasugai, Satoko Ugai, Yoshiaki Usui, Madoka Iwase, Tomotaka Ugai, Isao Oze, Hidemi Ito, Keitaro Matsuo
    • Organizer
      第78回日本癌学会学術総会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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