• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Comprehensive analyses of time-specific mechanisms of spermatogonial stem cell development and novel strategy for reproductive medicine

Research Project

Project/Area Number 20H03816
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 56030:Urology-related
Research InstitutionNagoya City University

Principal Investigator

Mizuno Kentaro  名古屋市立大学, 医薬学総合研究院(医学), 准教授 (70448710)

Co-Investigator(Kenkyū-buntansha) 神沢 英幸  名古屋市立大学, 医薬学総合研究院(医学), 研究員 (00551277)
加藤 大貴  名古屋市立大学, 医薬学総合研究院(医学), 助教 (00620931)
西尾 英紀  名古屋市立大学, 医薬学総合研究院(医学), 助教 (10621063)
林 祐太郎  名古屋市立大学, 医薬学総合研究院(医学), 教授 (40238134)
安井 孝周  名古屋市立大学, 医薬学総合研究院(医学), 教授 (40326153)
岩月 正一郎  名古屋市立大学, 医薬学総合研究院(医学), 助教 (70595397)
梅本 幸裕  名古屋市立大学, 医薬学総合研究院(医学), 教授 (80381812)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2022: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2021: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2020: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
Keywords精子幹細胞 / 停留精巣 / 男性不妊症 / セルトリ細胞 / 細胞分化 / 生殖医療
Outline of Research at the Start

近年、不妊症に対する生殖医療の必要性が高まっており、その基盤研究の推進は重要な課題である。しかし、男性不妊症患者の80%は精子形成・成熟が障害される特発性造精機能障害とされ、その病態は明らかでない。精子形成過程は、前駆細胞から精子幹細胞が分化する幼若期と、分化した細胞から成熟精子となる成熟期に分けられる。先行研究を行う中で、私たちは、精子幹細胞がどのようにして時期特異的に”幹細胞”としての形質を獲得し、男性不妊症では形質がどう変化しているのか、という疑問点を抱くに至った。本研究課題はこれらの学術的問いを解明し、生殖医療に対する新たな治療戦略を可能にしようとするものである。

Outline of Final Research Achievements

Based on our previous research, we focused on the behavior of “spermatogonial stem cells (SSCs)”, which become the main source of mature spermatozoa, for clarifying the cause of idiopathic male infertility. Then, we considered cryptorchidism as an ideal research tool because the number of SSCs is decreased in the undescended testes. Using biopsy samples derived from the patients with cryptorchidism during orchiopexy, we analyzed the relationship the number of SSCs and the levels of several serum hormones. Further, we also assessed the testicular tissues during puberty using a cryptorchid animal model. As a result, we identified significant correlations between Sertoli cells-related hormones (FSH, AMH, INHB) and the number of SSCs. And we also discovered that disorganization of CLDN11 was observed the cryptorchid testes during puberty, and that subsequent dysfunction of blood testes barrier causes impaired spermatogenesis.

Academic Significance and Societal Importance of the Research Achievements

これまで精巣生検という侵襲的な手法でしか精子幹細胞数を評価することができなかったが、本研究によって、Sertoli細胞関連ホルモン値を組み合わせることで、高い感度・特異度で精巣組織内の精子幹細胞数を予測することが可能となった。また、思春期まで停留精巣を放置するとCLDN11タンパクの局在変化によって血液精巣関門が正常に機能しなくなり、造精機能障害が起きることが明らかとなった。これらのことから、将来的に精巣機能不全が起こりうる症例を層別化でき、早期の診断・治療介入を行うことや患者・家族への適切な情報提供を行うことが可能となり、男性不妊症の新たな治療の一助となると考えられる。

Report

(4 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (32 results)

All 2023 2022 2021 2020

All Journal Article (14 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 14 results,  Open Access: 6 results) Presentation (18 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Ureterocele prolapse eliciting unusual patient behavior to control intermittent voiding2023

    • Author(s)
      Nishio Hidenori、Mizuno Kentaro、Matsumoto Daisuke、Yasui Takahiro、Hayashi Yutaro
    • Journal Title

      Urology Case Reports

      Volume: 46 Pages: 102295-102295

    • DOI

      10.1016/j.eucr.2022.102295

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A Novel Transvesicoscopic Ureteral Reimplantation Technique to Treat an Infantile Ectopic Ureter in a Single System2022

    • Author(s)
      Nishio Hidenori、Mizuno Kentaro、Matsumoto Daisuke、Kato Taiki、Kamisawa Hideyuki、Kurokawa Satoshi、Nakane Akihiro、Maruyama Tetsuji、Yasui Takahiro、Hayashi Yutaro
    • Journal Title

      Urology

      Volume: 164 Pages: 244-247

    • DOI

      10.1016/j.urology.2021.12.028

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Transvesicoscopic ureteral reimplantation and ureteroscopy for management of primary obstructed non‐refluxing megaureter with ureteral calculus2022

    • Author(s)
      Kato Taiki、Mizuno Kentaro、Matsumoto Daisuke、Nishio Hidenori、Nakane Akihiro、Kurokawa Satoshi、Kamisawa Hideyuki、Maruyama Tetsuji、Yasui Takahiro、Hayashi Yutaro
    • Journal Title

      IJU Case Reports

      Volume: 5 Issue: 5 Pages: 327-329

    • DOI

      10.1002/iju5.12469

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Pelviureteric junction obstruction of the ipsilateral kidney caused by hydronephrosis secondary to crossed fused renal ectopia2022

    • Author(s)
      Kato Taiki、Aoki Maria、Torii Koei、Hamakawa Takashi、Nishio Hidenori、Mizuno Kentaro、Ikegami Yosuke、Maruyama Tetsuji、Hayashi Yutaro、Yasui Takahiro
    • Journal Title

      IJU Case Reports

      Volume: 5 Issue: 5 Pages: 354-357

    • DOI

      10.1002/iju5.12487

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Low Serum Inhibin B/Follicle-Stimulating Hormones and Anti-Mullerian Hormone/Follicle-Stimulating Hormones Ratios as Markers of Decreased Germ Cells in Infants with Bilateral Cryptorchidism2021

    • Author(s)
      Kato T, Mizuno K, Matsumoto D, Nishio H, Nakane A, Kurokawa S, Kamisawa H, Maruyama T, Iwatsuki S, Umemoto Y, Yasui T, Hayashi Y
    • Journal Title

      J Urology

      Volume: 207 Issue: 3 Pages: 701-709

    • DOI

      10.1097/ju.0000000000002344

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A case of posterior urethral valve identified in an older child by straining to void2021

    • Author(s)
      Nishio H, Mizuno K, Kato T, Maruyama T, Yasui T, Hayashi Y.
    • Journal Title

      Urology Case Reports

      Volume: 40 Pages: 101886-101886

    • DOI

      10.1016/j.eucr.2021.101886

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Urodynamic effectiveness of a beta-3 adrenoreceptor agonist (vibegron) for a pediatric patient with anticholinergic-resistant neurogenic detrusor overactivity: a case report2021

    • Author(s)
      Kato T, Mizuno K, Nishio H, Yasui T, Hayashi Y.
    • Journal Title

      Journal of Medical Case Reports

      Volume: 15 Issue: 1 Pages: 86-86

    • DOI

      10.1186/s13256-020-02564-w

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Antireflux endoscopic injection therapy in postpubertal patients via techniques adopted for the dilated ureteral orifice2021

    • Author(s)
      Maruyama T, Mizuno K, Nishio H, Kato T, Hamakawa T, Ikegami Y, Yasui T, Hayashi Y.
    • Journal Title

      BMC Urology

      Volume: 21 Issue: 1 Pages: 70-75

    • DOI

      10.1186/s12894-021-00842-3

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A novel method of transvesicoscopic ureteral reimplantation of an ectopic ureter with a mate ureter in a duplex kidney2021

    • Author(s)
      Nishio H, Mizuno K, Matsumoto D, Kato T, Hideyuki K, Satoshi K, Maruyama T, Yasui T, Hayashi Y.
    • Journal Title

      IJU Case Reports

      Volume: 5 Issue: 2 Pages: 132-135

    • DOI

      10.1002/iju5.12401

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Disorganization of claudin-11 and dysfunction of the blood-testis barrier during puberty in a cryptorchid rat model2020

    • Author(s)
      Kato Taiki、Mizuno Kentaro、Nishio Hidenori、Moritoki Yoshinobu、Kamisawa Hideyuki、Kurokawa Satoshi、Nakane Akihiro、Maruyama Tetsuji、Ando Ryosuke、Hayashi Yutaro、Yasui Takahiro
    • Journal Title

      Andrology

      Volume: - Issue: 5 Pages: 231-235

    • DOI

      10.1111/andr.12788

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Guidelines for the medical management of pediatric vesicoureteral reflux.2020

    • Author(s)
      Miyakita H, Hayashi Y, Mitsui T, Okawada M, Kinoshita Y, Kimata T, Koikawa Y, Sakai K, Satoh H, Tokunaga M, Naitoh Y, Niimura F, Matsuoka H, Mizuno K, Kaneko K, Kubota M
    • Journal Title

      International Journal of Urology

      Volume: 27 Issue: 6 Pages: 480-490

    • DOI

      10.1111/iju.14223

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Appropriate timing of performing abdominal ultrasonography and termination of follow-up observation for antenatal grade 1 or 2 hydronephrosis.2020

    • Author(s)
      Nakane A, Mizuno K, Kato T, Nishio H, Kamisawa H, Kurokawa S, Maruyama T, Yasui T, Hayashi Y
    • Journal Title

      BMC Urology

      Volume: 20 Issue: 1 Pages: 178-178

    • DOI

      10.1186/s12894-020-00750-y

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Genetic and histopathological analysis of Transverse testicular ectopia without persistent Mullerian duct syndrome: two case reports.2020

    • Author(s)
      Nagai T, Mizuno K, Usami M, Nishio H, Kato T, Nakane A, Matsumoto D, Kurokawa S, Kamisawa H, Maruyama T, Yasui T, Hayashi Y
    • Journal Title

      Journal of Medical Case Report

      Volume: 14 Issue: 1 Pages: 233-233

    • DOI

      10.1186/s13256-020-02559-7

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Robot-Assisted Radical Cystectomy for Pediatric Bladder Rhabdomyosarcoma.2020

    • Author(s)
      Nishio H, Mizuno K, Kawase K, Kato T, Kamisawa H, Kurokawa S, Nakane A, Ando R, Maruyama T, Yasui T, Hayashi Y.
    • Journal Title

      J Endourol Case Rep.

      Volume: 6 Issue: 4 Pages: 461-464

    • DOI

      10.1089/cren.2020.0116

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] 停留精巣における造精機能障害2022

    • Author(s)
      水野健太郎、西尾英紀、林祐太郎
    • Organizer
      第32回臨床内分泌代謝Update
    • Related Report
      2022 Annual Research Report
  • [Presentation] 膀胱外アプローチによる腹腔鏡・ロボット膀胱尿管逆流防止術の現状2022

    • Author(s)
      水野健太郎、西尾英紀、中根明宏、丸山哲史、戸澤啓一、安井孝周、林祐太郎
    • Organizer
      第35回日本内視鏡外科学会総会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 停留精巣の最新診療2022

    • Author(s)
      水野健太郎
    • Organizer
      第74回西日本泌尿器科学会総会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 小児におけるロボット支援腹腔鏡下腎盂形成術2022

    • Author(s)
      水野健太郎、西尾英紀、戸澤啓一、安井孝周、林祐太郎
    • Organizer
      第36回日本泌尿器内視鏡・ロボティクス学会総会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 乳児両側高度VUR(Ⅳ / Ⅴ)、両側高度VUR症例に対する腹腔鏡・ロボット手術の治療成績2022

    • Author(s)
      水野健太郎、西尾英紀、林祐太郎
    • Organizer
      第31回日本小児泌尿器科学会総会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Analysis of the Role of Thyroid Function in the Differentiation Process of Spermatogonial Stem Cells in Cryptorchid Testes2021

    • Author(s)
      Mizuno K, Nishio H, Matsumoto D, Kato T, Nakane A, Maruyama T, Yasui T, Hayashi Y.
    • Organizer
      AUA 2021 Annual Meeting
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 腹腔鏡・ロボット支援下膀胱尿管逆流防止術における逆流消失に寄与する要因の検討2021

    • Author(s)
      水野健太郎、西尾英紀、林祐太郎
    • Organizer
      第30回日本小児泌尿器科学会総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 教育講演「論文の書き方~症例報告から始めよう、はじめの一歩~」2021

    • Author(s)
      水野健太郎
    • Organizer
      第30回日本小児泌尿器科学会総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] シンポジウム「ロボット腎盂形成術ー温故創新」二次治療としてのロボット腎盂形成術2021

    • Author(s)
      水野健太郎、西尾英紀、黒川覚史、加藤大貴、戸澤啓一、安井孝周、林祐太郎
    • Organizer
      第33回日本内視鏡外科学会総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ロボット腎盂形成術におけるFireflyの使用経験2021

    • Author(s)
      水野健太郎、西尾英紀、中根明宏、濵本周造、丸山哲史、戸澤啓一、安井孝周、林祐太郎
    • Organizer
      第35回日本泌尿器内視鏡学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] シンポジウム「ロボット支援腹腔鏡下腎盂形成術(RLPP)~普及のために必要なこと~」ロボット腎盂形成術の普及のために:「腹腔鏡手術の経験は必要」の立場から2021

    • Author(s)
      水野健太郎、西尾英紀、黒川覚史、中根明宏、丸山哲史、戸澤啓一、安井孝周、林祐太郎
    • Organizer
      第35回日本泌尿器内視鏡学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ワークショップ「小児ロボット手術の幕開け」小児膀胱尿管逆流に対するロボット支援手術2021

    • Author(s)
      水野健太郎、西尾英紀、黒川覚史、中根明宏、丸山哲史、戸澤啓一、安井孝周、林祐太郎
    • Organizer
      第34回日本内視鏡外科学会総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ワークショップ「ロボット支援手術の新たな術式」ロボット支援腹腔鏡下腎盂形成術の新たな展開2021

    • Author(s)
      水野健太郎、西尾英紀、中根明宏、丸山哲史、戸澤啓一、安井孝周、林祐太郎
    • Organizer
      第109回日本泌尿器科学会総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Surgical outcomes and properties of laparoscopic and robot-assisted laparoscopic ureteral re-implantation in pediatric patients with vesicoureteral reflux: a comparative study.2020

    • Author(s)
      Mizuno K, Nishio H, Kato T, Nakane A, Maruyama T, Tozawa K, Yasui T, Hayashi Y
    • Organizer
      Society for Pediatric Urology’s 68th Annual Meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Potential role of EEF1A1 and TPT1 genes expressed in the spermatogonial stem cells as a predictive factor of subsequent testicular growth.2020

    • Author(s)
      Mizuno K, Nishio H, Kato T, Kamisawa H, Moritoki Y, Kurokawa S, Nakane A, Maruyama T, Yasui T, Hayashi Y
    • Organizer
      AUA 2020 Annual Meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 停留精巣の造精機能障害における血液精巣関門の意義 ーCLDN11タンパク発現と超微細構造の解析ー2020

    • Author(s)
      加藤大貴、水野健太郎、西尾英紀、安井孝周、林祐太郎
    • Organizer
      第108回 日本泌尿器科学会総会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 小児泌尿器科領域の基礎研究の現状と展望2020

    • Author(s)
      水野健太郎、西尾英紀、加藤大貴、中根明宏、丸山哲史、安井孝周、林祐太郎
    • Organizer
      第108回 日本泌尿器科学会総会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 精細管ステージ特異的なapical ectoplasmic specializationの遺伝子発現解析2020

    • Author(s)
      武田知樹、岩月正一郎、野崎哲史、西尾英紀、窪田裕樹、神谷浩行、水野健太郎、最上徹、林祐太郎、梅本幸裕、安井孝周
    • Organizer
      第108回 日本泌尿器科学会総会
    • Related Report
      2020 Annual Research Report

URL: 

Published: 2020-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi