1. Immunology and Inflammation
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IgM and IgD B cell receptors differentially respond to endogenous antigens and control B cell fate

  1. Mark Noviski
  2. James L Mueller
  3. Anne Satterthwaite
  4. Lee Ann Garrett-Sinha
  5. Frank Brombacher
  6. Julie Zikherman  Is a corresponding author
  1. University of California, San Francisco, United States
  2. UT Southwestern Medical Center, United States
  3. University at Buffalo, The State University of New York, United States
  4. International Center for Genetic Engineering and Biotechnology (ICGE), Cape Town, South Africa
Research Article
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Cite this article as: eLife 2018;7:e35074 doi: 10.7554/eLife.35074

Abstract

Naive B cells co-express two BCR isotypes, IgM and IgD, with identical antigen-binding domains but distinct constant regions. IgM but not IgD is downregulated on autoreactive B cells. Because these isotypes are presumed to be redundant, it is unknown how this could impose tolerance. We introduced the Nur77-eGFP reporter of BCR signaling into mice that express each BCR isotype alone. Despite signaling strongly in vitro, IgD is less sensitive than IgM to endogenous antigen in vivo and developmental fate decisions are skewed accordingly. IgD-only Lyn-/- B cells cannot generate autoantibodies and short-lived plasma cells (SLPCs) in vivo, a fate thought to be driven by intense BCR signaling induced by endogenous antigens. Similarly, IgD-only B cells generate normal germinal center, but impaired IgG1+ SLPC responses to T-dependent immunization. We propose a role for IgD in maintaining the quiescence of autoreactive B cells and restricting their differentiation into autoantibody secreting cells.

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Author details

  1. Mark Noviski

    Biomedical Sciences Graduate Program, University of California, San Francisco, San Francisco, United States
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0001-8072-1059

  2. James L Mueller

    Department of Medicine, University of California, San Francisco, San Francisco, United States
    Competing interests
    The authors declare that no competing interests exist.

  3. Anne Satterthwaite

    Department of Immunology, UT Southwestern Medical Center, Dallas, United States
    Competing interests
    The authors declare that no competing interests exist.

  4. Lee Ann Garrett-Sinha

    Department of Biochemistry, University at Buffalo, The State University of New York, Buffalo, United States
    Competing interests
    The authors declare that no competing interests exist.

  5. Frank Brombacher

    International Center for Genetic Engineering and Biotechnology (ICGE), Cape Town, Cape Town, South Africa
    Competing interests
    The authors declare that no competing interests exist.

  6. Julie Zikherman

    Department of Medicine, University of California, San Francisco, San Francisco, United States
    For correspondence
    julie.zikherman@ucsf.edu
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0002-0873-192X

Funding

National Institute of Arthritis and Musculoskeletal and Skin Diseases (R01 A127648)

  • Julie Zikherman

National Science Foundation (1650113)

  • Mark Noviski

The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.

Ethics

Animal experimentation: This study was performed in strict accordance with the recommendations in the Guide for the Care and Use of Laboratory Animals of the National Institutes of Health. All of the animals were handled according to approved institutional animal care and use committee (IACUC) protocols of the University of California, San Francisco. The protocol was approved by the IACUC committee of the University of California, San Francisco (Protocol number: AN171020-01).

Reviewing Editor

  1. Facundo D Batista, Ragon Institute of MGH, MIT and Harvard, United States

Publication history

  1. Received: January 13, 2018
  2. Accepted: March 8, 2018
  3. Accepted Manuscript published: March 9, 2018 (version 1)
  4. Version of Record published: April 12, 2018 (version 2)

Copyright

© 2018, Noviski et al.

This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.

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