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2016 ; 271
(1
): 141-55
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Development of T-cell tolerance utilizes both cell-autonomous and cooperative
presentation of self-antigen
#MMPMID27088912
Perry JS
; Hsieh CS
Immunol Rev
2016[May]; 271
(1
): 141-55
PMID27088912
show 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 T-cell receptor (TCR)
self-reactivity, costimulation, cytokines, and antigen presentation by a variety
of antigen-presenting cells (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 -ell 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.