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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Baumgarth, Nicole Nguyen, Trang T. T. Elsner, Rebecca A. |
| Description | Author Affiliation: Nguyen TT ( Center for Comparative Medicine, University of California, Davis, Davis, CA 95616); Elsner RA ( Center for Comparative Medicine, University of California, Davis, Davis, CA 95616); Baumgarth N ( Center for Comparative Medicine, University of California, Davis, Davis, CA 95616) |
| Abstract | It is unclear why selective deficiency in secreted (s)IgM causes Ab-mediated autoimmunity. We demonstrate that sIgM is required for normal B cell development and selection. The CD5(+) B cells that were previously shown to accumulate in body cavities of sIgM(-/-) mice are not B-1a cells, but CD19(int), CD43(-), short-lived, BCR signaling-unresponsive anergic B-2 cells. Body cavity B-1 cells were >10-fold reduced, including VH11(+) and phosphotidylcholine-specific B-1a cells, whereas splenic B-1 cells were unaffected and marginal zone B cells increased. Follicular B cells had higher turnover rates, survived poorly after adoptive transfer, and were unresponsiveness to BCR stimulation in vitro. sIgM bound to B cell precursors and provided a positive signal to overcome a block at the pro/pre-B stage and during IgVH repertoire selection. Polyclonal IgM rescued B cell development and returned autoantibody levels to near normal. Thus, natural IgM deficiency causes primary autoimmune disease by altering B cell development, selection, and central tolerance induction. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| DOI | 10.4049/jimmunol.1401880 |
| Journal | The Journal of Immunology |
| Issue Number | 4 |
| Volume Number | 194 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2015-02-15 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Autoimmunity Immunology B-lymphocyte Subsets B-lymphocytes Central Tolerance Immunoglobulin M Animals Autoantibodies Autoimmune Diseases Cell Separation Clonal Anergy Enzyme-linked Immunosorbent Assay Flow Cytometry Immune Tolerance Mice Mice, Inbred C57bl Mice, Knockout Real-time Polymerase Chain Reaction Research Support, N.i.h., Extramural Research Support, Non-u.s. Gov't Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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