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Molecular cloning of a gene selectively induced by gamma interferon from human macrophage cell line U937

Journal Article · · Mol. Cell. Biol.; (United States)
DOI:https://doi.org/10.1128/MCB.9.5.1922· OSTI ID:5826616
A cDNA clone encoding a gamma interferon (IFN-/gamma/)-inducible mRNA in human cells of the macrophage lineage was isolated and characterized. The corresponding gene, /gamma/.1, was selectively induced by IFN-/gamma/, responding a hundredfold better to IFN-/gamma/ than to IFN-/alpha/. The induction was rapid and transient, with maximal mRN accumulation at about 3 h and decline to the basal level after 48 h. Transcriptional activation could be detected as early as 5 min after IFN-/gamma/ stimulation and accounted entirely for the mRNA accumulation. The induction of /gamma/.1 by IFN-/gamma/ was cell-type restricted, being seen only in macrophages and endothelial cells. In addition, phorbol ester-induced differentiation of promyelocytic HL-60 cells and promonocytic THP-1 cells rendered the /gamma/.1 gene inducible by IFN-/gamma/. The 1.0-kilobsase /gamma/.1 cDNA sequence encoded a small predicted polypeptide of 38 amino acids and had a conserved sequence associated with rapidly turning over mRNAs. In vitro transmission of the /gamma/.1 transcript yielded a 4,000-dalton polypeptide.
Research Organization:
Albert Einstein Coll. of Medicine, Bronx, NY (USA); Imperial Cancer Research Fund, Lincoln's Inn Fields, London WC 2 (GB)
OSTI ID:
5826616
Journal Information:
Mol. Cell. Biol.; (United States), Journal Name: Mol. Cell. Biol.; (United States) Vol. 9:5; ISSN MCEBD
Country of Publication:
United States
Language:
English