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Notch Signaling is Necessary for Adult, but Not Fetal, Development of RORγt(+) Innate Lymphoid Cells

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Journal Nat Immunol
Date 2011 Sep 13
PMID 21909092
Citations 133
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Abstract

The transcription factor RORγt is required for the development of several innate lymphoid populations, such as lymphoid tissue-inducer cells (LTi cells) and cells that secrete interleukin 17 (IL-17) or IL-22. The progenitor cells as well as the developmental stages that lead to the emergence of RORγt(+) innate lymphoid cells (ILCs) remain undefined. Here we identify the chemokine receptor CXCR6 as an additional marker of the development of ILCs and show that common lymphoid progenitors lost B cell and T cell potential as they successively acquired expression of the integrin α(4)β(7) and CXCR6. Whereas fetal RORγt(+) cells matured in the fetal liver environment, adult bone marrow-derived RORγt(+) ILCs matured outside the bone marrow, in a Notch2-dependent manner. Therefore, fetal and adult environments influence the differentiation of RORγt(+) cells differently.

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