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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Morrot, Alexandre Dalai, Sarat K. Mirshahidi, Saied Zavala, Fidel Sadegh-Nasseri, Scheherazade |
| Description | Country affiliation: United States Author Affiliation: Dalai SK ( Department of Pathology, Johns Hopkins School of Medicine, Johns Hopkins Bloomberg School of Public Health, Johns Hopkins University, Baltimore MD 21205, USA.) |
| Abstract | Induction of tolerance in memory T cells has profound implications in the treatment of autoimmune diseases and transplant rejection. Previously, we reported that the presentation of low densities of agonist peptide/MHC class II complexes induced anergy in memory CD4(+) T cells. In the present study, we address the specific interaction of different types of APCs with memory CD4(+) T cells. A novel ex vivo anergy assay first suggested that B cells induce anergy in memory T cells, and an in vivo cell transfer assay further confirmed those observations. We demonstrated that B cells pulsed with defined doses of Ag anergize memory CD4 cells in vivo. We established that CD11c(+) dendritic cells do not contribute to anergy induction to CD4 memory T cells, because diphtheria toxin receptor-transgenic mice that were conditionally depleted of dendritic cells optimally induced anergy in memory CD4(+) T cells. Moreover, B cell-deficient muMT mice did not induce anergy in memory T cells. We showed that B2 follicular B cells are the specific subpopulation of B cells that render memory T cells anergic. Furthermore, we present data showing that anergy in this system is mediated by CTLA-4 up-regulation on T cells. This is the first study to demonstrate formally that B cells are the APCs that induce anergy in memory CD4(+) T cells. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| Journal | The Journal of Immunology |
| Issue Number | 5 |
| Volume Number | 181 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2008-09-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | B-lymphocytes Physiology Cd4-positive T-lymphocytes Clonal Anergy Immunology Immunologic Memory Animals Antigen-presenting Cells Antigens, Cd Genetics Ctla-4 Antigen Coculture Techniques Mice Up-regulation Research Support, N.i.h., Extramural Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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