PubAg

Main content area

Oct-1 Regulates IL-17 Expression by Directing Interchromosomal Associations in Conjunction with CTCF in T Cells

Author:
Kim, Lark Kyun, Esplugues, Enric, Zorca, Cornelia E., Parisi, Fabio, Kluger, Yuval, Kim, Tae Hoon, Galjart, Niels J., Flavell, Richard A.
Source:
Molecular cell 2014 v.54 pp. 56-66
ISSN:
1097-2765
Subject:
T-lymphocytes, antigens, binding sites, deoxyribonuclease I, gene expression, genes, interferon-gamma, interleukin-17, interleukin-4, loci
Abstract:
Interchromosomal associations can regulate gene expression, but little is known about the molecular basis of such associations. In response to antigen stimulation, naive T cells can differentiate into Th1, Th2, and Th17 cells expressing IFN-γ, IL-4, and IL-17, respectively. We previously reported that in naive T cells, the IFN-γ locus is associated with the Th2 cytokine locus. Here we show that the Th2 locus additionally associates with the IL-17 locus. This association requires a DNase I hypersensitive region (RHS6) at the Th2 locus. RHS6 and the IL-17 promoter both bear Oct-1 binding sites. Deletion of either of these sites or Oct-1 gene impairs the association. Oct-1 and CTCF bind their cognate sites cooperatively, and CTCF deficiency similarly impairs the association. Finally, defects in the association lead to enhanced IL-17 induction. Collectively, our data indicate Th17 lineage differentiation is restrained by the Th2 locus via interchromosomal associations organized by Oct-1 and CTCF.
Agid:
5539447