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2019 Fiscal Year Annual Research Report

変異ウイルスに対して有効な液性免疫記憶形成機序

Research Project

Project/Area Number 19H01028
Research InstitutionOsaka University

Principal Investigator

黒崎 知博  大阪大学, 免疫学フロンティア研究センター, 特任教授(常勤) (50178125)

Project Period (FY) 2019-04-01 – 2022-03-31
KeywordsメモリーB細胞 / 抗体 / 変異ウイルス再感染 / レパトアー
Outline of Annual Research Achievements

液性免疫記憶発動に特徴的な現象、迅速・高親和性IgG抗体産生、を支えるメカニズムとして、一次感染時、メモリーB細胞は、その生成過程で高親和性IgG抗体を有する細胞のみ選択され、同じウイルスの2次感染時、迅速活性化されると、長い間考えられていた。このモデルでは、2度目に変異ウイルス、例えばパンデミックインフルエンザ(ドラスチックな変異が入り、大流行を引き起こす)感染時、最初のウイルスに対する高親和性IgG抗体有するメモリーB細胞は、もはや反応できず、にもかかわらず、なぜ免疫記憶反応が成立するヒトが存在するのかが謎であった。
申請者らは、一次感染時、メモリーB細胞集団は、高親和性ではなく、親和性が中・低度の細胞が選択されているデータを得(Nat. Immunol. 2016)、「この広汎な、抗体レパトアメモリーB細胞の存在が、二次変異ウイルス感染時、免疫記憶反応を誘導できる基盤である」という仮説提唱に至った(Immunol. Rev. 2018)。
本年度は、まずこの仮説検定をモデルマウス感染系でおこなった。インフルエンザNarita株でまず感染さし、メモリーB細胞を作らせたのち、変異インフルエンザPR8株を感染さし、実際既に産生されている抗体ではなく、作られているメモリーB細胞が活性化され、PR8株にも有効な抗体を産生することが、PR8株除去に重要であることを証明した。即ち、申請者らの仮説は妥当性を持っていることが判明した。

Current Status of Research Progress
Current Status of Research Progress

1: Research has progressed more than it was originally planned.

Reason

この課題は申請者らの仮説検定が、キーステップであり、検定までに、約1.5年かかると予測していたが、それより早いスピードで結果が得られた。

Strategy for Future Research Activity

仮説の妥当性が証明されたので、予定どおり1)中・低親和性メモリーB細胞生成メカニズムの探索 2)メモリーB細胞の変異株での活性化メカニズム、を進めていく。

  • Research Products

    (17 results)

All 2020 2019 Other

All Journal Article (10 results) (of which Int'l Joint Research: 7 results,  Peer Reviewed: 10 results,  Open Access: 9 results) Presentation (6 results) (of which Int'l Joint Research: 5 results,  Invited: 6 results) Remarks (1 results)

  • [Journal Article] Repurposing the psoriasis drug Oxarol to an ointment adjuvant for the influenza vaccine2020

    • Author(s)
      Sato Ryota、Makino-Okamura Chieko、Lin Quingshun、Wang Muying、Shoemaker Jason E、Kurosaki Tomohiro、Fukuyama Hidehiro
    • Journal Title

      International Immunology

      Volume: - Pages: -

    • DOI

      10.1093/intimm/dxaa012

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Attenuation of TCR-induced transcription by Bach2 controls regulatory T cell differentiation and homeostasis2020

    • Author(s)
      Sidwell Tom、Liao Yang、Garnham Alexandra L.、Vasanthakumar Ajithkumar、Gloury Renee、Blume Jonas、Teh Peggy P.、Chisanga David、Thelemann Christoph、de Labastida Rivera Fabian、Engwerda Christian R.、Corcoran Lynn、Kometani Kohei、Kurosaki Tomohiro、Smyth Gordon K.、Shi Wei、Kallies Axel
    • Journal Title

      Nature Communications

      Volume: 11 Pages: -

    • DOI

      10.1038/s41467-019-14112-2

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Restricted Clonality and Limited Germinal Center Reentry Characterize Memory B Cell Reactivation by Boosting2020

    • Author(s)
      Mesin Luka、Schiepers Arien、Ersching Jonatan、Barbulescu Alexandru、Cavazzoni Cecilia B.、Angelini Alessandro、Okada Takaharu、Kurosaki Tomohiro、Victora Gabriel D.
    • Journal Title

      Cell

      Volume: 180 Pages: 92~106.e11

    • DOI

      10.1016/j.cell.2019.11.032

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Tet2 and Tet3 in B cells are required to repress CD86 and prevent autoimmunity2020

    • Author(s)
      Tanaka S, Ise W, Inoue T,Ito A, Ono C, Shima Y, Sakakibara S, Nakayama M, Fujii K, Miura I,Sharif J, Koseki H, Pandelakis K, Raman I, Li Q,Kubo M, Fujiki K, Nakato R, Shirahige K, Araki H, Miura F, Ito T,Kawakami E, Baba Y, and Kurosaki T.
    • Journal Title

      Nat. Immunol.

      Volume: - Pages: -

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] B cell‐intrinsic MyD88 signaling controls IFN‐γ‐mediated early IgG2c class switching in mice in response to a particulate adjuvant2019

    • Author(s)
      Lee Michelle Sue Jann、Natsume‐Kitatani Yayoi、Temizoz Burcu、Fujita Yukiko、Konishi Aki、Matsuda Kyoko、Igari Yoshikatsu、Tsukui Toshihiro、Kobiyama Kouji、Kuroda Etsushi、Onishi Motoyasu、Marichal Thomas、Ise Wataru、Inoue Takeshi、Kurosaki Tomohiro、Mizuguchi Kenji、Akira Shizuo、Ishii Ken J、Coban Cevayir
    • Journal Title

      European Journal of Immunology

      Volume: 49 Pages: 1433~1440

    • DOI

      10.1002/eji.201848084

    • Peer Reviewed / Open Access
  • [Journal Article] Requirement for memory B-cell activation in protection from heterologous influenza virus reinfection2019

    • Author(s)
      Leach Sarah、Shinnakasu Ryo、Adachi Yu、Momota Masatoshi、Makino-Okamura Chieko、Yamamoto Takuya、Ishii Ken J、Fukuyama Hidehiro、Takahashi Yoshimasa、Kurosaki Tomohiro
    • Journal Title

      International Immunology

      Volume: 31 Pages: 771~779

    • DOI

      10.1093/intimm/dxz049

    • Peer Reviewed / Open Access
  • [Journal Article] Exposure of an occluded hemagglutinin epitope drives selection of a class of cross-protective influenza antibodies2019

    • Author(s)
      Adachi Yu、Tonouchi Keisuke、Nithichanon Arnone、Kuraoka Masayuki、Watanabe Akiko、Shinnakasu Ryo、Asanuma Hideki、Ainai Akira、Ohmi Yusuke、Yamamoto Takuya、Ishii Ken J.、Hasegawa Hideki、Takeyama Haruko、Lertmemongkolchai Ganjana、Kurosaki Tomohiro、Ato Manabu、Kelsoe Garnett、Takahashi Yoshimasa
    • Journal Title

      Nature Communications

      Volume: 10 Pages: -

    • DOI

      10.1038/s41467-019-11821-6

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] GPR40 activation initiates store-operated Ca2+ entry and potentiates insulin secretion via the IP3R1/STIM1/Orai1 pathway in pancreatic β-cells2019

    • Author(s)
      Usui Ryota、Yabe Daisuke、Fauzi Muhammad、Goto Hisanori、Botagarova Ainur、Tokumoto Shinsuke、Tatsuoka Hisato、Tahara Yumiko、Kobayashi Shizuka、Manabe Toshiya、Baba Yoshihiro、Kurosaki Tomohiro、Herrera Pedro Luis、Ogura Masahito、Nagashima Kazuaki、Inagaki Nobuya
    • Journal Title

      Scientific Reports

      Volume: 9 Pages: -

    • DOI

      10.1038/s41598-019-52048-1

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Guidelines for the use of flow cytometry and cell sorting in immunological studies (second edition)2019

    • Author(s)
      Cossarizza Andrea et al.
    • Journal Title

      European Journal of Immunology

      Volume: 49 Pages: 1457~1973

    • DOI

      10.1002/eji.201970107

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Plasma cell differentiation during the germinal center reaction2019

    • Author(s)
      Ise Wataru、Kurosaki Tomohiro
    • Journal Title

      Immunological Reviews

      Volume: 288 Pages: 64~74

    • DOI

      10.1111/imr.12751

    • Peer Reviewed
  • [Presentation] Function of humoral memory compartments and their generation mechanism2020

    • Author(s)
      Kurosaki, T
    • Organizer
      New Horizons in B Cell Biology
    • Int'l Joint Research / Invited
  • [Presentation] Two functional humoral memory compartments and their generation mechanism2020

    • Author(s)
      Kurosaki, T
    • Organizer
      B Cell Renaissance: Epigenetics, Regulation and Immunotherapy,Keystone Symposia
    • Int'l Joint Research / Invited
  • [Presentation] Generation of humoral memory compartments2019

    • Author(s)
      Kurosaki, T.
    • Organizer
      The 10th JSH INTERNATIONAL SYMPOSIUM 2019 in Ise-Shima
    • Int'l Joint Research / Invited
  • [Presentation] Roles of epigenetic modification in B cell tolerance2019

    • Author(s)
      Kurosaki, T
    • Organizer
      2nd International Symposium on“B cell responses in immunity and autoimmunity
    • Int'l Joint Research / Invited
  • [Presentation] 「B細胞・抗体を介する免疫制御」2019

    • Author(s)
      黒崎 知博
    • Organizer
      第55回日本移植学会総会
    • Invited
  • [Presentation] Function of Tet proteins in B cell tolerance2019

    • Author(s)
      Kurosaki, T
    • Organizer
      the International Symposium of Korean Autoimmunity-Synovitis Study Group
    • Int'l Joint Research / Invited
  • [Remarks] Laboratory of Lymphocyte Differentiation

    • URL

      http://lymph.ifrec.osaka-u.ac.jp/

URL: 

Published: 2021-01-27  

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