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Elucidation of autism etiology by combination of phenotype clustering and high-dimensional variables selection method

Research Project

Project/Area Number 16H05242
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Epidemiology and preventive medicine
Research InstitutionTohoku University

Principal Investigator

KURIYAMA SHINICHI  東北大学, 災害科学国際研究所, 教授 (90361071)

Co-Investigator(Kenkyū-buntansha) 田宮 元  東北大学, 東北メディカル・メガバンク機構, 教授 (10317745)
呉 繁夫  東北大学, 医学系研究科, 教授 (10205221)
瀬戸 俊之  大阪市立大学, 大学院医学研究科, 准教授 (60423878)
吉川 貴仁  大阪市立大学, 大学院医学研究科, 教授 (10381998)
Research Collaborator Yamanaka Chizuru  
Matsubara Hiroko  
Nagai Masato  
Obara Taku  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2018: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2017: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords自閉スペクトラム症 / 遺伝子 / クラスタ― / ビタミンB6 / ゲノムワイド関連解析 / 脳神経疾患 / クラスタリング / 次元削減 / クラスター / 遺伝学 / ゲノム
Outline of Final Research Achievements

We investigated whether machine learning methods could potentially identify a subgroup of persons with autism spectrum disorder (ASD) who show vitamin B6 responsiveness by selected phenotype variables. We analyzed the existing data from our intervention study with 17 persons. The affinity propagation analysis showed good classification of three potential vitamin B6-responsive persons with ASD. The k-medoids analysis also showed good classification.
We show a two-step genome-wide association study (GWAS). In the first step, we observed no significant associations in a GWAS including 597 cases and 370 controls. In the second step, we conducted a cluster analysis using k-means with 15 clusters based on Autism Diagnostic Interview-Revised (ADI-R) scores and history of vitamin treatment. We then conducted GWAS by each subgroup of cases vs all controls (cluster-based GWAS) and identified significant associations with 93 chromosomal loci that satisfied the genome-wide significance threshold.

Academic Significance and Societal Importance of the Research Achievements

ビタミンB6反応性を予測する因子に関する研究は、われわれの知る限り、特定の治療法に反応する自閉スペクトラム症のサブグループの同定を試みた世界初のものであり、本研究結果は自閉スペクトラム症を治療反応性によって個別化する精密医療の先駆けとなるものである。
表現型によってクラスターに分けたのちにGenome Wide Association Studyを行う研究では、自閉スペクトラム症のように多様な特徴を示す疾患症例群をクラスタリングによって分割し、よりホモな集団に近づけることで特徴に応じた危険因子を同定できる可能性が示唆された。

Report

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

    (4 results)

All 2019 2018 2017

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (2 results)

  • [Journal Article] Potential identification of vitamin B6 responsiveness in autism spectrum disorder utilizing phenotype variables and machine learning methods2018

    • Author(s)
      Obara Taku、Ishikuro Mami、Kuriyama Shinichi、et al.
    • Journal Title

      Scientific Reports

      Volume: 8 Issue: 1 Pages: 14840-14840

    • DOI

      10.1038/s41598-018-33110-w

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Detecting genetic association through shortest paths in a bidirected graph2017

    • Author(s)
      Ueki M, Kawasaki Y, Tamiya G
    • Journal Title

      Genetic Epidemiology

      Volume: 未定 Issue: 6 Pages: 481-497

    • DOI

      10.1002/gepi.22051

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] 機械学習を用いたクラスタリングによる自閉スペクトラム症の原因遺伝子の探索2019

    • Author(s)
      永井雅人、成田暁、水野聖士、荻島創一、田宮元、植木優夫、櫻井利恵子、牧野悟士、小原拓、石黒真美、山中千鶴、松原博子、村上慶子、小林朋子、小林美佳、寳澤篤、菊谷昌浩、目時弘仁、呉繁夫、栗山進一
    • Organizer
      第29回日本疫学会学術総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 自閉スペクトラム症患者のフェノタイプを用いたクラスタリングに基づく全ゲノム関連解析2018

    • Author(s)
      水野聖士、永井雅人、成田暁、山中千鶴、松原博子、田宮元、寳澤篤、荻島創一、栗山進一
    • Organizer
      日本人類遺伝学会第63回大会
    • Related Report
      2018 Annual Research Report

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

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