alexa The diverse roles of IRF4 in late germinal center B-cell differentiation.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Stem Cell Research & Therapy

Author(s): De Silva NS, Simonetti G, Heise N, Klein U

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Abstract Interferon regulatory factor 4 (IRF4) is a member of the IRF family of transcription factors and is expressed in most cell types of the immune system. Within the B-cell lineage, IRF4 is expressed in all developmental stages except during the germinal center (GC) reaction. IRF4 expression, however, is upregulated during exit from the GC reaction and has been demonstrated to have critical functions in at least three key developmental processes: the termination of the GC B-cell transcriptional program, immunoglobulin (Ig) class switch recombination (CSR), and plasma cell development. Herein, we attempt to reconcile the often contradictory findings regarding IRF4 into a model to explain the role of IRF4 in the transcription factor networks that operate within exiting GC B cells. In addition, a deregulation of the biological programs controlled by IRF4 has recently been implicated in the pathogenesis of various B-cell-derived malignancies. Determining the specific functions of IRF4 in the markedly diverse developmental processes that coordinate B-cell development is therefore likely to have important implications for understanding these malignancies and devising therapeutic interventions. © 2012 John Wiley & Sons A/S. This article was published in Immunol Rev and referenced in Journal of Stem Cell Research & Therapy

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