Stage-specific control of early B cell development by the transcription factor Ikaros
- Author(s)
- Schwickert, TA; Tagoh, H; Gultekin, S; Dakic, A; Axelsson, E; Minnich, M; Ebert, A; Werner, B; Roth, M; Cimmino, L; Dickins, RA; Zuber, J; Jaritz, M; Busslinger, M;
- Details
- Publication Year 2014-02-09,Volume 15,Issue #3,Page 283-93
- Journal Title
- Nature Immunology
- Publication Type
- Journal Article
- Abstract
- The transcription factor Ikaros is an essential regulator of lymphopoiesis. Here we studied its B cell-specific function by conditional inactivation of the gene encoding Ikaros (Ikzf1) in pro-B cells. B cell development was arrested at an aberrant 'pro-B cell' stage characterized by increased cell adhesion and loss of signaling via the pre-B cell signaling complex (pre-BCR). Ikaros activated genes encoding signal transducers of the pre-BCR and repressed genes involved in the downregulation of pre-BCR signaling and upregulation of the integrin signaling pathway. Unexpectedly, derepression of expression of the transcription factor Aiolos did not compensate for the loss of Ikaros in pro-B cells. Ikaros induced or suppressed active chromatin at regulatory elements of activated or repressed target genes. Notably, binding of Ikaros and expression of its target genes were dynamically regulated at distinct stages of early B lymphopoiesis.
- Publisher
- NATURE PUBLISHING GROUP
- Research Division(s)
- Molecular Medicine; Molecular Immunology
- Publisher's Version
- https://doi.org/ni.2828 [pii]; 10.1038/ni.2828
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Creation Date: 2014-03-11 12:01:06