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Aberrant expression of IFN-γ in Th2 cells from Th2 LCR-deficient mice. | LitMetric

Aberrant expression of IFN-γ in Th2 cells from Th2 LCR-deficient mice.

Biochem Biophys Res Commun

Department of Life Science, Sogang University, Seoul 121-742, Republic of Korea.

Published: August 2012

AI Article Synopsis

Article Abstract

The Th2 locus control region (LCR) has been shown to be a crucial cis-acting element for Th2 cytokine expression and Th2 cell differentiation. To study the role of Th2 LCR in ifng locus regulation, we examined the expression of IFN-γ in Th2 cells from Th2 LCR-deficient mice. We found IFN-γ to be aberrantly up-regulated. In addition, histone 3(H3)-acetylation and histone 3 lysine 4 (H3-K4)-methylation greatly increased at the ifng locus of the Th2 cells. GATA-3 and STAT6 bound to the ifng promoter in Th2 cells from the wild type but not from the Th2 LCR-deficient mice, and they directly repressed ifng expression in transient reporter assay. Moreover, ectopic expression of GATA-3 and STAT6-VT repressed the aberrant expression of the ifng gene and restored repressive chromatin state at the ifng locus in Th2 cells from Th2 LCR-deficient mice. These results suggest that expression of the ifng gene and chromatin remodeling of the ifng locus are under the control of a Th2 LCR-mediated Th2 differentiation program.

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Source
http://dx.doi.org/10.1016/j.bbrc.2012.06.146DOI Listing

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