Kostrzewski, T; Borg, AJ; Meng, Y; Filipovic, I; Male, V; Wack, A; DiMaggio, PA; Kostrzewski, T; Borg, AJ; Meng, Y; Filipovic, I; Male, V; Wack, A; DiMaggio, PA; Brady, HJM; - view fewer (2018) Multiple Levels of Control Determine How E4bp4/Nfil3 Regulates NK Cell Development. Journal of Immunology , 200 (4) pp. 1370-1381. 10.4049/jimmunol.1700981.

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Abstract

The transcription factor E4bp4/Nfil3 has been shown to have a critical role in the development of all innate lymphoid cell types including NK cells. In this study, we show that posttranslational modifications of E4bp4 by either SUMOylation or phosphorylation have profound effects on both E4bp4 function and NK cell development. We examined the activity of E4bp4 mutants lacking posttranslational modifications and found that Notch1 was a novel E4bp4 target gene. We observed that abrogation of Notch signaling impeded NK cell production and the total lack of NK cell development from E4bp4-/- progenitors was completely rescued by short exposure to Notch peptide ligands. This work reveals both novel mechanisms in NK cell development by a transcriptional network including E4bp4 with Notch, and that E4bp4 is a central hub to process extrinsic stimuli.

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