title: Retinoic acid-inducible gene-I is induced by interferon-gamma and regulates the expression of interferon-gamma stimulated gene 15 in MCF-7 cells.
abstract: Retinoic acid-inducible gene-I (RIG-I) is a member of the DExH box family proteins, which have diverse roles in regulation of gene expression and cellular functions. We found RIG-I mRNA and protein were expressed in MCF-7 human breast cancer cells stimulated with interferon-gamma (IFN-gamma). This effect of IFN-gamma was observed in concentration- and time-dependent manners, and IFN-gamma also induced promoter activity of RIG-I. Transfection of GFP-RIG-I cDNA into MCF-7 cells resulted in the expression of RIG-I protein in cytoplasm. Overexpression of RIG-I induced the upregulation of IFN-gamma stimulated gene 15, which has the potential to amplify the immunomodulatory effects. We conclude that IFN-gamma induces the expression of RIG-I, which may play a role in the immunological effects of IFN-gamma.
authors.affiliation: Department of Vascular Biology, Institute of Brain Science, Hirosaki University School of Medicine, 5 Zaifu-cho, Hirosaki, 036-8562, Japan.
authors.forename: Xue-Fan
authors.initials: XF
authors.lastname: Cui
authors.forename: Tadaatsu
authors.initials: T
authors.lastname: Imaizumi
authors.forename: Hidemi
authors.initials: H
authors.lastname: Yoshida
authors.forename: Ernest C
authors.initials: EC
authors.lastname: Borden
authors.forename: Kei
authors.initials: K
authors.lastname: Satoh
mesh_terms: D000998:Antiviral Agents / Q000494:pharmacology*; D001943:Breast Neoplasms / Q000378:metabolism* / Q000473:pathology; D045744:Cell Line, Tumor; D016207:Cytokines / Q000096:biosynthesis* / Q000235:genetics; D003593:Cytoplasm / Q000378:metabolism; D000071457:DEAD Box Protein 58; D053487:DEAD-box RNA Helicases; D005260:Female; D005786:Gene Expression Regulation / Q000187:drug effects / Q000235:genetics; D006801:Humans; D007371:Interferon-gamma / Q000494:pharmacology*; D011401:Promoter Regions, Genetic / Q000235:genetics*; D020365:RNA Helicases / Q000096:biosynthesis* / Q000235:genetics; D012333:RNA, Messenger / Q000096:biosynthesis; D011971:Receptors, Immunologic; D014452:Ubiquitins / Q000031:analogs & derivatives* / Q000096:biosynthesis* / Q000235:genetics
chemical_list: D000998:Antiviral Agents; D016207:Cytokines; D012333:RNA, Messenger; D011971:Receptors, Immunologic; D014452:Ubiquitins; C074034:ISG15 protein, human; D007371:Interferon-gamma; C452820:RIGI protein, human; D000071457:DEAD Box Protein 58; D053487:DEAD-box RNA Helicases; D020365:RNA Helicases