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2016 ; 7
(ä): 10562
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Increased generation of Foxp3(+) regulatory T cells by manipulating antigen
presentation in the thymus
#MMPMID26923114
Lin J
; Yang L
; Silva HM
; Trzeciak A
; Choi Y
; Schwab SR
; Dustin ML
; Lafaille JJ
Nat Commun
2016[Feb]; 7
(ä): 10562
PMID26923114
show ga
Regulatory T-cell (Treg) selection in the thymus is essential to prevent
autoimmune diseases. Although important rules for Treg selection have been
established, there is controversy regarding the degree of self-reactivity
displayed by T-cell receptors expressed by Treg cells. In this study we have
developed a model of autoimmune skin inflammation, to determine key parameters in
the generation of skin-reactive Treg cells in the thymus (tTreg). tTreg
development is predominantly AIRE dependent, with an AIRE-independent component.
Without the knowledge of antigen recognized by skin-reactive Treg cells, we are
able to enhance skin-specific tTreg cell generation using three approaches.
First, we increase medullary thymic epithelial cells by using mice lacking
osteoprotegerin or by adding TRANCE (RANKL, Tnfsf11). Second, we inject
intrathymically peripheral dendritic cells from skin-draining sites. Finally, we
inject skin tissue lysates intrathymically. These findings have implications for
enhancing the generation of organ-specific Treg cells in autoimmune diseases.