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PMID |
Sentence |
| 1 |
15271977
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A distal region in the interferon-gamma gene is a site of epigenetic remodeling and transcriptional regulation by interleukin-2.
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| 2 |
15271977
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IL-2 is another key immunoregulatory cytokine that is involved in T helper differentiation and is known to induce IFN-gamma expression in natural killer (NK) and T cells.
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| 3 |
15271977
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Despite concerted efforts to identify the one or more transcriptional control mechanisms by which IL-2 induces IFN-gamma mRNA expression, no such genomic regulatory regions have been described.
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| 4 |
15271977
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Within this distal region we found a Stat5-like motif, and in vitro DNA binding assays as well as in vivo chromosomal immunoprecipitation assays showed IL-2-induced binding of both Stat5a and Stat5b to this distal element in the IFNG gene.
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| 5 |
15271977
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We examined the function of this Stat5-binding motif by transfecting human peripheral blood mononuclear cells with -3.6 kb of IFNG-luciferase constructs and found that phorbol 12-myristate 13-acetate/ionomycin-induced transcription was augmented by IL-2 treatment.
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| 6 |
15271977
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The effect of IL-2 was lost when the Stat5 motif was disrupted.
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| 7 |
15271977
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These data led us to conclude that this distal region serves as both a target of chromatin remodeling in the IFNG locus as well as an IL-2-induced transcriptional enhancer that binds Stat5 proteins.
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