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Development of T cell tolerance utilizes both cell-autonomous and cooperative presentation of self-antigen #MMPMID27088912
Perry JSA; Hsieh CS
Immunol Rev 2016[May]; 271 (1): 141-55 PMID27088912show ga
The development of T cell self-tolerance in the thymus is important for establishing immune homeostasis and preventing autoimmunity. Here, we review the components of T cell tolerance, which includes TCR self-reactivity, costimulation, cytokines, and antigen presentation by a variety of APCs subsets. We discuss the current evidence on the process of regulatory T (Treg) cell and negative selection and the importance of TCR signaling. We then examine recent evidence showing unique roles for bone marrow (BM)-derived APCs and medullary thymic epithelial cells (mTECs) on the conventional and Treg TCR repertoire, as well as emerging data on the role of B cells in tolerance. Finally, we review the accumulating data that suggest that cooperative antigen presentation is a prominent component of T cell tolerance. With the development of tools to interrogate the function of individual APC subsets in the medulla, we have gained greater understanding of the complex cellular and molecular events that determine T cell tolerance.