Mast cell degranulation breaks peripheral tolerance.
Mast cell degranulation breaks peripheral tolerance.
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DOI:
10.1111/j.1600-6143.2009.02755.x
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发表时间:
2009-10
期刊:
影响因子:
--
通讯作者:
Noelle RJ
中科院分区:
文献类型:
--
作者:
de Vries VC;Wasiuk A;Bennett KA;Benson MJ;Elgueta R;Waldschmidt TJ;Noelle RJ
Mast cells (MC) have been shown to mediate regulatory T-cell (Treg) dependent, peripheral allograft tolerance in both skin and cardiac transplants. Furthermore, Treg have been implicated in mitigating IgE mediated MC degranulation, establishing a dynamic, reciprocal relationship between MC and Treg in controlling inflammation. In an allograft tolerance model, it is now shown that intragraft or systemic MC degranulation results in the transient loss of Treg suppressor activities with the acute, T-cell dependent rejection of established, tolerant allografts. Upon degranulation, MC mediators can be found in the skin, Treg rapidly leave the graft, MC accumulate in the regional lymph node and the Treg are impaired in the expression of suppressor molecules. Such a dramatic reversal of Treg function and tissue distribution by MC degranulation underscores how allergy may causes the transient breakdown of peripheral tolerance and episodes of acute T-cell inflammation.
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