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The E-Id Protein Axis Specifies Innate and Adaptive Lymphoid Cell Fate #MMPMID28514688
Miyazaki M; Miyazaki K; Chen K; Jin Y; Turner J; Moore AJ; Saito R; Yoshida K; Ogawa S; Rodewald HR; Lin YC; Kawamoto H; Murre C
Immunity 2017[May]; 46 (5): 818-834.e4 PMID28514688show ga
Innate and adaptive lymphoid development is orchestrated by the activities of E-proteins and their antagonist Id-proteins, but how these factors regulate early T cell progenitor (ETP) and innate lymphoid cell (ILC) development remains unclear. Using multiple genetic strategies we demonstrated that E-proteins E2A and HEB acted in synergy in the thymus to establish T cell identity and to suppress the aberrant development of ILCs, including ILC2s and lymphoid tissue-inducer-like cells. E2A and HEB orchestrated T cell fate and suppressed the ILC transcription signature by activating the expression of genes associated with Notch receptors, T cell receptor (TCR) assembly, and TCR-mediated signaling. E2A and HEB acted in ETPs to establish and maintain a T cell-lineage specific enhancer repertoire, including regulatory elements associated with the Notch1 and Rag1/2 gene loci. Based on these and previous observations we propose that the E-Id protein axis specifies innate versus adaptive lymphoid cell fate.