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

Development of new diagnostic markers and reversible fertility inhibitors for mammalian spermatozoa

Research Project

Project/Area Number 21K19198
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 42:Veterinary medical science, animal science, and related fields
Research InstitutionNational Cardiovascular Center Research Institute

Principal Investigator

Fujihara Yoshitaka  国立研究開発法人国立循環器病研究センター, 研究所, 部長 (70578848)

Project Period (FY) 2021-07-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2021: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords診断マーカー / 雄性不妊 / 哺乳類精子 / 小分子化合物 / 精子診断マーカー / 受精障害 / 子宮-卵管移行 / CRISPR-Cas9
Outline of Research at the Start

本研究では、研究代表者が最近発見した精子膜タンパク質に着目して、これまで診断項目として存在しなかった「見かけ正常な受精不全精子」の発見・改善・制御という三段活用を目指して取り組む。

特に、子宮内精子の卵管への移行不全現象は、自然交配では決して見つけることができない不妊原因である。それらの原因タンパク質に対する精子診断マーカーの開発は、ヒトや家畜の不妊検査の原因究明に大いに役立つと予想される。そして、子宮内精子の卵管への移行不全を酵素添加によって正常精子へ近づけることができれば、自然妊娠や家畜での人工授精の受精率向上へと繋げる萌芽研究を行う。

Outline of Final Research Achievements

In this study, we focused on the newly discovered "morphologically normal spermatozoa with fertilization defects". We developed antibodies to detect abnormal spermatozoa in humans and domestic animals and identified new candidates through the development of genome-edited mice. While we could not obtain high-quality antibodies, we did find that sperm membrane protein SPACA4 and epididymal proteins LCNs and LY6G5B/C are necessary for the sperm fertilizing ability and can be candidates for diagnostic infertility markers. Furthermore, we discovered that the PDCL2 protein is essential for spermatogenesis via mutant mouse analysis and succeeded in identifying two types of small-molecule compounds that specifically bind to the human PDCL2 protein. Currently, we are investigating the reversible fertility inhibitory effects using these compounds.

Academic Significance and Societal Importance of the Research Achievements

本研究成果は、研究代表者が一貫して進めてきた男性不妊の新たな表現型「見かけ正常な受精不全精子」を示す原因遺伝子の探索と検出方法の開発に貢献する。原因遺伝子の発見は、哺乳類精子の受精能力制御メカニズムの解明に繋がり、検出法はヒトや家畜等の精子性状検査の主項目である精子量、形態、運動性に続く第四の検査項目としての可能性を再検証できた。また、精子タンパク質を対象に小分子化合物による受精機能阻害はホルモン療法に頼らない可逆的な男性避妊薬の開発に向けて研究を推進できた。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (16 results)

All 2022 2021 Other

All Int'l Joint Research (4 results) Journal Article (8 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 8 results,  Open Access: 8 results) Remarks (4 results)

  • [Int'l Joint Research] ウィーンバイオセンター(オーストリア)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] ベイラー医科大学(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] ウィーンバイオセンター(オーストリア)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] ベイラー医科大学(米国)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Sperm membrane proteins DCST1 and DCST2 are required for sperm-egg interaction in mice and fish2022

    • Author(s)
      Noda Taichi、Blaha Andreas、Fujihara Yoshitaka、Gert Krista R.、Emori Chihiro、Deneke Victoria E.、Oura Seiya、Panser Karin、Lu Yonggang、Berent Sara、Kodani Mayo、Cabrera-Quio Luis Enrique、Pauli Andrea、Ikawa Masahito
    • Journal Title

      Communications Biology

      Volume: 5 Issue: 1 Pages: 1-11

    • DOI

      10.1038/s42003-022-03289-w

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] TULP2 deletion mice exhibit abnormal outer dense fiber structure and male infertility2022

    • Author(s)
      Oyama Yuki、Miyata Haruhiko、Shimada Keisuke、Larasati Tamara、Fujihara Yoshitaka、Ikawa Masahito
    • Journal Title

      Reproductive Medicine and Biology

      Volume: 21 Issue: 1 Pages: 1-8

    • DOI

      10.1002/rmb2.12467

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The testis-specific E3 ubiquitin ligase RNF133 is required for fecundity in mice2022

    • Author(s)
      Nozawa K、Fujihara Y、Devlin DJ、Deras RE、Kent K、Larina IV、Umezu K、Yu Z、Sutton CM、Ye Q、Dean LK、Emori C、Ikawa M、Garcia TX、Matzuk MM.
    • Journal Title

      BMC Biology

      Volume: 20 Issue: 1 Pages: 161-161

    • DOI

      10.1186/s12915-022-01368-2

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Advancing ASMS with LC‐MS/MS for the discovery of novel PDCL2 ligands from DNA‐encoded chemical library selections2022

    • Author(s)
      Ye Q、Belabed H、Wang Y、Yu Z、Palaniappan M、Li JY、Kalovidouris SA、MacKenzie KR、Teng M、Young DW、Fujihara Y、Matzuk MM.
    • Journal Title

      Andrology

      Volume: - Issue: 5 Pages: 808-815

    • DOI

      10.1111/andr.13309

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] PDCL2 is essential for sperm acrosome formation and male fertility in mice2022

    • Author(s)
      Fujihara Y、Kobayashi K、Abbasi F、Endo T、Yu Z、Ikawa M、Matzuk MM.
    • Journal Title

      Andrology

      Volume: - Issue: 5 Pages: 789-798

    • DOI

      10.1111/andr.13329

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] CRISPR/Cas9‐mediated disruption of <i>lipocalins</i> , <i>Ly6g5b</i> , and <i>Ly6g5c</i> causes male subfertility in mice2022

    • Author(s)
      Sakurai N、Fujihara Y、Kobayashi K、Ikawa M.
    • Journal Title

      Andrology

      Volume: - Issue: 5 Pages: 981-990

    • DOI

      10.1111/andr.13350

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] CRISPR/Cas9-mediated genome editing reveals 12 testis-enriched genes dispensable for male fertility in mice2022

    • Author(s)
      Oyama Yuki、Miyata Haruhiko、Shimada Keisuke、Fujihara Yoshitaka、Tokuhiro Keizo、Garcia ThomasX、Matzuk MartinM、Ikawa Masahito
    • Journal Title

      Asian Journal of Andrology

      Volume: in press Issue: 3 Pages: 0-0

    • DOI

      10.4103/aja.aja_63_21

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The conserved fertility factor SPACA4/Bouncer has divergent modes of action in vertebrate fertilization2021

    • Author(s)
      Fujihara Yoshitaka、Herberg Sarah、Blaha Andreas、Panser Karin、Kobayashi Kiyonori、Larasati Tamara、Novatchkova Maria、Theussl Hans-Christian、Olszanska Olga、Ikawa Masahito、Pauli Andrea
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 118 Issue: 39

    • DOI

      10.1073/pnas.2108777118

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Remarks] Researchmap

    • URL

      https://researchmap.jp/Yoshitaka_Fujihara/?lang=japanese

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
  • [Remarks] 国立研究開発法人国立循環器病研究センター先端医療技術開発部HP

    • URL

      https://www.ncvc.go.jp/res/divisions/amt/

    • Related Report
      2022 Annual Research Report
  • [Remarks] 大阪大学微生物病研究所遺伝子機能解析分野HP

    • URL

      https://egr.biken.osaka-u.ac.jp/

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
  • [Remarks] 国立研究開発法人国立循環器病研究センター分子生物学部HP

    • URL

      https://www.ncvc.go.jp/res/divisions/bioscience/

    • Related Report
      2021 Research-status Report

URL: 

Published: 2021-07-13   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi