Rank signaling links the development of invariant γδ T cell progenitors and Aire(+) medullary epithelium.

Rank signaling links the development of invariant γδ T cell progenitors and Aire(+) medullary epithelium.
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DOI:
10.1016/j.immuni.2012.01.016
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发表时间:
2012-03-23
期刊:
影响因子:
32.4
通讯作者:
Anderson G
Anderson G
中科院分区:
医学1区
文献类型:
--
作者:
Roberts NA;White AJ;Jenkinson WE;Turchinovich G;Nakamura K;Withers DR;McConnell FM;Desanti GE;Benezech C;Parnell SM;Cunningham AF;Paolino M;Penninger JM;Simon AK;Nitta T;Ohigashi I;Takahama Y;Caamano JH;Hayday AC;Lane PJ;Jenkinson EJ;Anderson G

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The thymic medulla provides a specialized microenvironment for the negative selection of T cells, with the presence of autoimmune regulator (Aire)-expressing medullary thymic epithelial cells (mTECs) during the embryonic-neonatal period being both necessary and sufficient to establish long-lasting tolerance. Here we showed that emergence of the first cohorts of Aire+ mTECs at this key developmental stage, prior to αβ T cell repertoire selection, was jointly directed by Rankl+ lymphoid tissue inducer cells and invariant Vγ5+ dendritic epidermal T cell (DETC) progenitors that are the first thymocytes to express the products of gene rearrangement. In turn, generation of Aire+ mTECs then fostered Skint-1-dependent, but Aire-independent, DETC progenitor maturation and the emergence of an invariant DETC repertoire. Hence, our data attributed a functional importance to the temporal development of Vγ5+ γδ T cells during thymus medulla formation for αβ T cell tolerance induction and demonstrated a Rank-mediated reciprocal link between DETC and Aire+ mTEC maturation. ► Invariant Vγ5+ thymocytes regulate formation of Aire+ medullary thymic epithelium ► Generation of an invariant Vγ5+ T cell population requires thymus medulla development ► Skint-1-mediated Vγ5+ thymocyte development is Aire independent ► Dependency on Tnfrsf11a links γδ T cell and medullary epithelium development
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