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Defective GATA-3 expression in Th2 LCR-deficient mice. | LitMetric
Th2 cell differentiation is critically influenced by transcription factor GATA-3 and by various cis-acting elements including enhancers, silencers and a locus control region (LCR) in the Th2 cytokine locus. Th2 LCR-deficient Th2 cells completely lost the expression of GATA-3 and the phosphorylation of STAT6. Histone 3 lysine 4 (H3-K4) was hypomethylated in the gata3 locus in these cells. GATA-3 and STAT6 bound several regulatory regions in the gata3 locus and transactivated the expression of the gata3 gene. These results suggest that Th2 differentiation program stimulates feed-forward regulation of gata3 gene expression.
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Sogang University , Seoul 121-742, Republic of Korea.
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.
Sogang University , Seoul 121-742, Republic of Korea.
Th2 cell differentiation is critically influenced by transcription factor GATA-3 and by various cis-acting elements including enhancers, silencers and a locus control region (LCR) in the Th2 cytokine locus. Th2 LCR-deficient Th2 cells completely lost the expression of GATA-3 and the phosphorylation of STAT6. Histone 3 lysine 4 (H3-K4) was hypomethylated in the gata3 locus in these cells.
Sogang University , Seoul 121-742, Korea.
Previous studies have shown that Th2 cytokine genes on mouse chromosome 11 are coordinately regulated by the Th2 locus control region (LCR). To examine the in vivo function of Th2 LCR, we generated CD4-specific Th2 LCR-deficient (cLCR KO) mice using Cre-LoxP recombination. The number of CD4 T cells in the cLCR KO mouse was comparable to that in wild-type mice.
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