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Elucidation of the pathogenic mechanism of testicular dysfunction due to malnutrition during the embryonic period

Research Project

Project/Area Number 17K10074
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Pediatrics
Research InstitutionHamamatsu University School of Medicine

Principal Investigator

Fujisawa Yasuko  浜松医科大学, 医学部附属病院, 講師 (40402284)

Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords胎生期低栄養環境 / 精巣機能低下 / 低アンドロゲン / DoHAD / 胎生期低栄養 / DOHaD / 精巣異形成症候群 / エピゲノム / ライディッヒ細胞 / 母体低栄養 / 子宮内発育遅延 / 精巣機能不全 / 胎生期プログラミング / 精巣 / 性分化
Outline of Final Research Achievements

We conducted a study to examine the mechanism of "undernutrition environment during the embryonic period causes postnatal testicular dysfunction and reproductive dysfunction". As a result of examining pregnant mice by dividing them into two groups, a free feeding group (C group) and a nutritionally restricted group (R group), a decrease in testosterone in the fetal testis, and sperm count at 6 weeks of age in R mothers. A decrease in numbers was revealed. From the above results, a new disease-onset theory of post-growth sperm count decrease due to low androgen state induced in the embryonic malnutrition environment was clarified. Furthermore, we are proceeding with whole-genome methylome of isolated Leydig cells.

Academic Significance and Societal Importance of the Research Achievements

近年、男性生殖器疾患の発症頻度は増加しています。その理由は様々ですが、なんらかの胎児期の環境因子の影響が考えられています。私たちは、母体の低栄養環境が生後の男性精巣機能の障害に関与する可能性を考え、マウスを使った実験にて検証を行いました。その結果、1母マウスの低栄養状態が胎児(胎仔)マウス精巣における男性ホルモン(テストステロン)の濃度を低下させる こと 2低栄養母マウスから出生した雄マウスでは、生後6週の時点で精子数が減少すること、が明らかになりました。以上から、私たちは胎生期低栄養環境に惹起された低男性ホルモン状態に起因する男性生殖器障害という新しい疾病発症セオリーを提唱します。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (9 results)

All 2020 2019 2018 2017

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (5 results) (of which Invited: 3 results)

  • [Journal Article] Partial androgen insensitivity syndrome caused by a deep intronic mutation creating an alternative splice acceptor site of the AR gene2018

    • Author(s)
      Ono Hiroyuki、Saitsu Hirotomo、Horikawa Reiko、Nakashima Shinichi、Ohkubo Yumiko、Yanagi Kumiko、Nakabayashi Kazuhiko、Fukami Maki、Fujisawa Yasuko、Ogata Tsutomu
    • Journal Title

      Scientific Reports

      Volume: 8 Issue: 1 Pages: 19-29

    • DOI

      10.1038/s41598-018-20691-9

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Paradoxical gain-of-function mutant of the G-protein-coupled receptor PROKR2 promotes early puberty.2017

    • Author(s)
      Fukami M, Suzuki E, Izumi Y, Torii T, Narumi S, Igarashi M, Miyado M, Katsumi M, Fujisawa Y, Nakabayashi K, Hata K, Umezawa A, Matsubara Y, Yamauchi J, Ogata T.
    • Journal Title

      Journal of Cellular and Molecular Medicine

      Volume: - Issue: 10 Pages: 2623-2626

    • DOI

      10.1111/jcmm.13146

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] FGFR1 Analyses in Four Patients with Hypogonadotropic Hypogonadism with Split-Hand/Foot Malformation: Implications for the Promoter Region.2017

    • Author(s)
      Ohtaka K, Fujisawa Y, Takada F, Hasegawa Y, Miyoshi T, Hasegawa T, Miyoshi H, Kameda H, Kurokawa-Seo M, Fukami M, Ogata T.
    • Journal Title

      Hum Mutat.

      Volume: 38 Issue: 5 Pages: 503-506

    • DOI

      10.1002/humu.23178

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] De novo IGF2 mutation on the paternal allele in a patient with Silver-Russell syndrome and ectrodactyly2017

    • Author(s)
      Yamoto Kaori、Saitsu Hirotomo、Nakagawa Norio、Nakajima Hisakazu、Hasegawa Tatsuji、Fujisawa Yasuko、Kagami Masayo、Fukami Maki、Ogata Tsutomu
    • Journal Title

      Human mutation

      Volume: 38 Issue: 8 Pages: 953-958

    • DOI

      10.1002/humu.23253

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] 胎内の低栄養環境と精巣機能障害~Testicular Dysgenesis Syndrome~2020

    • Author(s)
      藤澤泰子、緒方勤
    • Organizer
      第93回日本内分泌学会学術総会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 胎生期低栄養環境は胎仔テストステロン産生障害と成獣精子形成障害を引き起こす2019

    • Author(s)
      藤澤泰子
    • Organizer
      第37回内分泌代謝学サマーセミナー
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 胎生期低栄養環境は胎仔テストステロン産生障害と成獣精子形成障害を引き起 こす」2019

    • Author(s)
      藤澤泰子
    • Organizer
      第8回日本DOHaD学会学術集会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 胎生期低栄養環境が仔マウスの精巣機能に及ぼす影響2018

    • Author(s)
      藤澤泰子
    • Organizer
      第91回日本内分泌学会学術総会 宮崎 2018年4月26日-28日
    • Related Report
      2018 Research-status Report
  • [Presentation] 胎生期低栄養環境は胎仔テストステロン産生障害と成獣精子形成障害を引き起こす2018

    • Author(s)
      藤澤泰子
    • Organizer
      第52回日本小児内分泌学会学術集会 東京 2018年10月4-6日
    • Related Report
      2018 Research-status Report

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Published: 2017-04-28   Modified: 2022-01-27  

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