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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Karamali, Mariam Rachakonda, Amita B. Henry-Bonami, Rachel A. Thomas, James W. Williams, Jonathan M. Kendall, Peggy L. |
| Description | Country affiliation: United States Author Affiliation: Henry-Bonami RA ( Division of Rheumatology and Immunology, Department of Medicine, Vanderbilt University, Nashville TN 37232, USA.) |
| Abstract | Effective central tolerance is required to control the large extent of autoreactivity normally present in the developing B cell repertoire. Insulin-reactive B cells are required for type 1 diabetes in the NOD mouse, because engineered mice lacking this population are protected from disease. The Cg-Tg(Igh-6/Igh-V125)2Jwt/JwtJ (VH125Tg) model is used to define this population, which is found with increased frequency in the periphery of NOD mice versus nonautoimmune C57BL/6 VH125Tg mice; however, the ontogeny of this disparity is unknown. To better understand the origins of these pernicious B cells, anti-insulin B cells were tracked during development in the polyclonal repertoire of VH125Tg mice. An increased proportion of insulin-binding B cells is apparent in NOD mice at the earliest point of Ag commitment in the bone marrow. Two predominant L chains were identified in B cells that bind heterologous insulin. Interestingly, Vκ4-57-1 polymorphisms that confer a CDR3 Pro-Pro motif enhance self-reactivity in VH125Tg/NOD mice. Despite binding circulating autoantigen in vivo, anti-insulin B cells transition from the parenchyma to the sinusoids in the bone marrow of NOD mice and enter the periphery unimpeded. Anti-insulin B cells expand at the site of autoimmune attack in the pancreas and correlate with increased numbers of IFN-γ-producing cells in the repertoire. These data identify the failure to cull autoreactive B cells in the bone marrow as the primary source of anti-insulin B cells in NOD mice and suggest that dysregulation of central tolerance permits their escape into the periphery to promote disease. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| DOI | 10.4049/jimmunol.1201359 |
| Journal | The Journal of Immunology |
| Issue Number | 12 |
| Volume Number | 190 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2013-06-15 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Autoimmunity Immunology B-lymphocytes Bone Marrow Cells Diabetes Mellitus, Type 1 Islets Of Langerhans Self Tolerance Amino Acid Sequence Animals Autoantigens Cell Separation Enzyme-linked Immunosorbent Assay Flow Cytometry Immunoglobulin Variable Region Chemistry Genetics Insulin Lymphocyte Activation Mice Mice, Inbred Nod Molecular Sequence Data Research Support, N.i.h., Extramural Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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