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Investigating the levels of school club activities based on DNA damage and recovery capacity in adolescent girls

Research Project

Project/Area Number 19K11617
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 59030:Physical education, and physical and health education-related
Research InstitutionOkayama Healthcare Professional University (2020-2021)
The University of Tokyo (2019)

Principal Investigator

Yasuda Nobuo  岡山医療専門職大学, 健康科学部 作業療法学科, 教授 (00467119)

Co-Investigator(Kenkyū-buntansha) 谷岡 利裕  昭和大学, 薬学部, 准教授 (80360585)
中澤 公孝  東京大学, 大学院総合文化研究科, 教授 (90360677)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords酸化ストレス / DNA損傷・修復能 / 酸素摂取能力 / ステロイドホルモン / 第二次急伸期 / ミトコンドリアDNA
Outline of Research at the Start

これまで、酸化ストレスと酸素摂取能力(体力レベル)の関連性は、侵襲的な方法(血液、筋組織等)で評価されてきた。その間、唾液等を用いた非侵襲的な方法も試みられていたが、精度の高い定量的分析が困難であった。しかしながら、近年、唾液を用いた非侵襲的な方法でミトコンドリアDNAコピー数の検出が高い精度で可能になりつつあり、学校体育・スポーツ現場で応用できる機会が到来している。その点で、DNA損傷・修復能力と酸素摂取能力に基づいた唾液中ミトコンドリアDNAコピー数の定量化により、生徒の体力レベルやストレス耐性を迅速にかつ簡易的に特定することができれば、部活動水準を至適レベルで設定することが可能となる。

Outline of Final Research Achievements

The purpose of this study was to examine DNA damage and repair capacity after moderately prolonged exercise in relation to estrogen concentration, cardiorespiratory endurance (ventilatory threshold and peak oxygen uptake), and mitochondrial DNA copy number in adolescent female middle and high school students (14-18 years old, just after the second rapid growth phase) engaged in sports-related club activities. Whole body DNA damage and repair capacity as indicated by urinary 8-OHdG levels (8-OHdG, ng/mg creatinine) showed no significant correlation with urinary estrogen concentration, cardiopulmonary endurance, or salivary mitochondrial DNA copy number. These results suggest that DNA damage and repair exerted by transient moderate-intensity endurance exercise is not significantly affected by changes in estrogen concentrations associated with the follicular and luteal phases in physically active adolescent girls.

Academic Significance and Societal Importance of the Research Achievements

成長期女子のDNA損傷・修復能と心肺持久力、ミトコンドリアDNAコピー数及びエストロゲン濃度に関する作用機序については未知な部分が多い。その点で、本研究で得られたデータから、性周期による身体コンディションの状態をチェックし、パフォーマンスの維持・向上を目指した部活動実施基準を設定する上で重要な手掛かりとなり、有益性の高い情報を学校体育現場にフィードバックする一助となった。

Report

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

    (3 results)

All 2019

All Presentation (3 results) (of which Int'l Joint Research: 3 results)

  • [Presentation] Evaluation of autonomic activation after maximal cycling exercise in adolescent boys and girls2019

    • Author(s)
      Ando Y, Tanioka T, Nakazawa K, Yasuda N
    • Organizer
      2019 Asics Sports Medicine Australia Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effects of the menstrual cycle phase on autonomic responses following submaximal exercise in physically active adolescent girls2019

    • Author(s)
      Ukon Y, Tanioka T, Nakazawa K, Yasuda N
    • Organizer
      2019 Asics Sports Medicine Australia Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Assessment of 17β-estradiol level in response to DNA oxidation following submaximal exercise in adolescent girls2019

    • Author(s)
      Yasuda N, Tanioka T, Nakazawa K
    • Organizer
      2019 Asics Sports Medicine Australia Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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

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