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. 1991 Feb 1;173(2):417-22.
doi: 10.1084/jem.173.2.417.

5' regulatory region of a novel cytokine gene mediates selective activation by interferon gamma

T M Wright  1 , J M Farber
Affiliations

5' regulatory region of a novel cytokine gene mediates selective activation by interferon gamma

T M Wright et al. J Exp Med. .

Abstract

A newly described member of the platelet factor 4 family of cytokine genes, mig, is selectively induced by interferon gamma (IFN-gamma), and not IFN-alpha, in the mouse macrophage-like cell line RAW 264.7. Treatment of RAW 264.7 cells with IFN-gamma activated mig gene transcription as determined by nuclear run-on assays. mig genomic clones were isolated, and constructs containing genomic fragments that included the mig promoter region and the CAT reporter gene were prepared. In RAW 264.7 cells transfected with these constructs, CAT activity was found to be selectively induced by IFN-gamma. A 278-bp genomic fragment containing 235 nucleotides 5' of the transcription start site was sufficient for IFN-gamma-selective induction of CAT activity. Analysis of 5' deletion mutants localized a region essential for activation by IFN-gamma to within 64 nucleotides extending from -235 to -172. A genomic fragment containing this sequence was capable of conferring IFN-gamma inducibility to constructs with a heterologous promoter.

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