B-Cell Suppression in Adult Mice Injected with Anti-δ Followed by Anti-μ mAb
| Autor: | Hervé Bazin, Xavier Havaux, Yannick Nizet, Françoise Nisol, Dominique Latinne, Aziz Alami Chentoufi |
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| Rok vydání: | 2000 |
| Předmět: |
CD4-Positive T-Lymphocytes
Ovalbumin medicine.drug_class Immunology Population B-Lymphocyte Subsets Receptors Antigen B-Cell Bone Marrow Cells Receptors Fc Monoclonal antibody Immunoglobulin D Immune tolerance Mice Antigen Immune Tolerance medicine Animals education B cell B-Lymphocytes Mice Inbred BALB C education.field_of_study biology Vaccination Antibodies Monoclonal T-Lymphocytes Helper-Inducer Antigens T-Independent Molecular biology B-1 cell medicine.anatomical_structure biology.protein Female Antibody Dinitrophenols Spleen |
| Zdroj: | Cellular Immunology. 205:40-51 |
| ISSN: | 0008-8749 |
| Popis: | Cross-linking of surface IgM or IgD B-cell receptors (BCR) with appropriate anti-Ig antibodies induces IgM(high) or IgD(high) B-cell depletion, respectively. The aim of this paper is to analyze how injections of anti-delta followed by anti-mu monoclonal antibodies (mAb) can deplete and suppress B cells and then induce T-independent type 2 antigen tolerance in adult mice even after treatment is stopped. The experimental protocol consisted of three daily injections of anti-delta mAb followed by repeated injections of anti-mu mAb. It shows that a sequential injection of anti-delta and anti-mu mAb induces B-cell depletion and T-independent type 2 response downregulation. Morever, the T-dependent response is maintained, except for the IgG3 isotype. After clearance of the anti-delta mAb from the circulation, B cells reappear as an IgD(+) IgM(-) B-cell population in the bone marrow (BM) and spleen. The origin of IgD(+) IgM(-) cells was studied in scid mouse transfer models. We show that IgD(+) IgM(-) B cells are not mature cells reexpressing sIgD but BM-derived cells that require a T-cell presence to be developed. The lack of sIgM expression by posttranscriptional regulation and the need of T-cell help for escaping anti-mu negative selection suggest strongly that this population had properties similar to those of anergized B cells. These results support the potential use of sequential injections of anti-delta and anti-mu in the prevention of xenograft rejection. |
| Databáze: | OpenAIRE |
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