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Identification of testicular autoantigen in autoimmune orchitis

Research Project

Project/Area Number 19K18572
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 56030:Urology-related
Research InstitutionTokyo Medical University

Principal Investigator

Nagahori Kenta  東京医科大学, 医学部, 助教 (50759561)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords精巣 / 自己免疫精巣炎 / 精子形成障害 / 自己抗原 / 自己免疫性精巣炎 / 精巣炎 / 自己免疫 / 男性不妊症 / 炎症
Outline of Research at the Start

精子細胞・精子は自身の免疫系により異物として認識されるが、血液-精巣関門によって免疫系から完全に守られていると考えられている。しかし、ヒト特発性精子形成障害の精巣生検では、免疫グロブリン・補体沈着が認められる症例も多く、自己免疫機序が関与している可能性が高い。本研究では、[1]自己免疫性精子形成障害を惹起する自己抗原分子は何なのか? [2]同定された自己抗原分子は種を越えて自己免疫性精子形成障害を引き起こすのか?という自己免疫性精子形成障害発症の機序とその原因分子という疾患の核心に迫る。本研究の結果は、ヒト男性不妊症の「検査法の開発」および「予防法の確立」に大きな進歩をもたらす。

Outline of Final Research Achievements

Clinically, 60% of male infertility cases are categorized as idiopathic spermatogenic disturbance. In previous studies, lymphocytic infiltration and immune deposits were present in several testis biopsy specimens, indicating that inflammatory or immunological factors contribute to the occurrence of the lesions. However, autoimmunogenic antigens that induce autoimmune orchitis have not yet been identified. In this study, we found that immunization of male mice with testis-specific autoimmunogenic antigen (Hspa4l and Git1) was sufficient to induce experimental autoimmune orchitis. In addition, we demonstrated that both antibodies and T-cell activity against Hspa4l and Git1 are closely related to the pathogenesis of EAO, suggesting their utility as biomarkers of male infertility in humans.

Academic Significance and Societal Importance of the Research Achievements

特発性精子形成障害の精巣生検において、免疫グロブリンや補体沈着が認められる症例、つまり自己免疫性精子形成障害は多く報告されているが、その原因となる自己抗原の詳細については未だに不明である。本研究では実験的自己免疫精巣炎を誘導する因子を発見した。本研究の成果は、自己免疫性精巣炎の病因を理解するための新しいアプローチ法を提供し、自己免疫に基づく精子形成の障害に対する新しい診断法および検査法・治療法など新たな技術開発に対する重要な基礎的知見を提供する。

Report

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

    (15 results)

All 2022 2021 2020 2019

All Journal Article (12 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 12 results,  Open Access: 7 results) Presentation (3 results)

  • [Journal Article] Comparative anatomy on the development of sperm transporting pathway between the testis and mesonephros2022

    • Author(s)
      Omotehara Takuya、Nakata Hiroki、Nagahori Kenta、Itoh Masahiro
    • Journal Title

      Histochemistry and Cell Biology

      Volume: 157 Issue: 3 Pages: 321-332

    • DOI

      10.1007/s00418-021-02057-x

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] GIT1 is an untolerized autoantigen involved in immunologic disturbance of spermatogenesis2022

    • Author(s)
      Nagahori Kenta、Kuramasu Miyuki、Kawata Shinichi、Yakura Tomiko、Li Zhonglian、Hirai Shuichi、Qu Ning、Itoh Masahiro
    • Journal Title

      Histochemistry and Cell Biology

      Volume: 157 Issue: 3 Pages: 309-319

    • DOI

      10.1007/s00418-021-02061-1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Changes in Expression of Specific mRNA Transcripts after Single- or Re-Irradiation in Mouse Testes2022

    • Author(s)
      Nagahori Kenta、Qu Ning、Kuramasu Miyuki、Ogawa Yuki、Kiyoshima Daisuke、Suyama Kaori、Hayashi Shogo、Sakabe Kou、Yoshimoto Takayuki、Itoh Masahiro
    • Journal Title

      Genes

      Volume: 13 Issue: 1 Pages: 151-151

    • DOI

      10.3390/genes13010151

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Characteristic expression of CGRP and osteogenic and vasculogenic markers in the proximal and distal regions of the rib during male mouse development2022

    • Author(s)
      Sawada Iori、Sato Iwao、Kawata Shinichi、Nagahori Kenta、Omotehara Takuya、Yakura Tomiko、Li Zhong-Lian、Itoh Masahiro
    • Journal Title

      Annals of Anatomy - Anatomischer Anzeiger

      Volume: 240 Pages: 151883-151883

    • DOI

      10.1016/j.aanat.2021.151883

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Cytonuclear Estrogen Receptor Alpha Regulates Proliferation and Migration of Endometrial Carcinoma Cells2021

    • Author(s)
      Mierxiati Saimi, Shota Moriya, Zhong-Lian Li, Hidenobu Miyaso, Kenta Nagahori, Shinichi Kawata, Takuya Omotehara, Yuki Ogawa, Hirotsugu Hino, Keisuke Miyazawa, Kou Sakabe, Masahiro Itoh
    • Journal Title

      Tokai J Exp Clin Med

      Volume: 46(1) Pages: 7-16

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Heat shock protein A4L is a potent autoantigen for testicular autoimmunity in mice2021

    • Author(s)
      Nagahori Kenta、Hirai Shuichi、Hatayama Naoyuki、Kuramasu Miyuki、Omotehara Takuya、Kawata Shinichi、Li Zhonglian、Miyaso Hidenobu、Ogawa Yuki、Qu Ning、Terayama Hayato、Hayashi Shogo、Yi Shuang-Qin、Naito Munekazu、Itoh Masahiro
    • Journal Title

      Journal of Reproductive Immunology

      Volume: 145 Pages: 103318-103318

    • DOI

      10.1016/j.jri.2021.103318

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Neonatal maternal separation causes decreased numbers of Sertoli cell, spermatogenic cells, and sperm in mic2021

    • Author(s)
      Miyaso H, Nagahori K, Takano K, Omotehara T, Kawata S, Li ZL, Kuramasu M, Wu X, Ogawa Y, Itoh M
    • Journal Title

      Toxicol Mech Methods

      Volume: 31 Issue: 2 Pages: 56-66

    • DOI

      10.1080/15376516.2020.1841865

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Effect of Gosha-Jinki-Gan on Levels of Specific mRNA Transcripts in Mouse Testes after Busulfan Treatment2020

    • Author(s)
      Qu Ning、Nagahori Kenta、Kuramasu Miyuki、Ogawa Yuki、Suyama Kaori、Hayashi Shogo、Sakabe Kou、Itoh Masahiro
    • Journal Title

      Biomedicines

      Volume: 8 Issue: 10 Pages: 432-432

    • DOI

      10.3390/biomedicines8100432

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Co-Administration of the Traditional Medicines Hachimi-Jio-Gan and Hochu-Ekki-To Can Reverse Busulfan-Induced Aspermatogenesis2020

    • Author(s)
      Qu Ning、Kuramasu Miyuki、Nagahori Kenta、Ogawa Yuki、Hayashi Shogo、Hirayanagi Yoshie、Terayama Hayato、Suyama Kaori、Sakabe Kou、Itoh Masahiro
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 21 Issue: 5 Pages: 1716-1716

    • DOI

      10.3390/ijms21051716

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The effectiveness of traditional Japanese medicine Goshajinkigan in irradiation-induced aspermatogenesis in mice2019

    • Author(s)
      Takahashi Kumpei、Nagahori Kenta、Qu Ning、Kuramasu Miyuki、Hirayanagi Yoshie、Hayashi Shogo、Ogawa Yuki、Hatayama Naoyuki、Terayama Hayato、Suyama Kaori、Hirai Shuichi、Sakabe Kou、Itoh Masahiro
    • Journal Title

      BMC Complementary and Alternative Medicine

      Volume: 19 Issue: 1 Pages: 362-362

    • DOI

      10.1186/s12906-019-2786-z

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Immunological microenvironment in the testis.2019

    • Author(s)
      Qu N, Ogawa Y, Kuramasu M, Nagahori K, Sakabe K, Itoh M.
    • Journal Title

      Reprod Med Biol.

      Volume: 29 Issue: 1 Pages: 24-31

    • DOI

      10.1002/rmb2.12293

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 免疫寛容を受けていない精巣抗原遺伝子の同定2019

    • Author(s)
      永堀健太、平井宗一、倉升三幸、表原拓也、宮宗秀伸、李忠連、小川夕輝、伊藤正裕
    • Journal Title

      Reproductive Immunology and Biology

      Volume: 34 Pages: 27-35

    • NAID

      130008065853

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] GTPase活性化タンパク質(GIT1)の局在と自己免疫への関与2022

    • Author(s)
      永堀健太、倉升三幸、表原拓也、河田晋一、矢倉富子、李忠連、伊藤正裕
    • Organizer
      日本解剖学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] GTPase活性化タンパク質(GIT1)免疫によるマウス自己免疫精巣炎2021

    • Author(s)
      永堀健太、倉升三幸、平井宗一、表原拓也、李忠連、小川夕輝、伊藤正裕
    • Organizer
      日本生殖免疫学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 熱ショックタンパク質(HSP)免疫によるマウス自己免疫精巣炎2020

    • Author(s)
      永堀健太
    • Organizer
      日本生殖免疫学会
    • Related Report
      2020 Research-status Report

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

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