title: Antisense manganese superoxide dismutase mRNA inhibits the antiviral action of interferon-gamma and interferon-alpha.
abstract: Manganese superoxide dismutase (MnSOD) is induced by interferon-gamma (IFN-gamma) in various cell lines. To determine whether MnSOD plays a role in the antiviral action of IFN-gamma, we employed an antisense strategy to inhibit the expression of MnSOD in the human melanoma cell line, A375. Three antisense-containing clones that exhibited reduced induction of MnSOD were investigated with respect to their response to the antiviral protective effects of IFN-gamma and IFN-alpha. We observed a striking decrease in the ability of IFN-gamma to protect antisense clones from vesicular stomatitis virus infection (VSV). The IFN-alpha induced antiviral state was also impaired, but to a lesser degree than was observed with IFN-gamma. We excluded the possibility that these effects were caused by a higher sensitivity of the antisense cells to VSV itself and found that the antisense clones actually were less sensitive to VSV. Therefore, we conclude that MnSOD is involved in the establishment of the IFN-gamma-induced antiviral state and to a lesser degree in the antiviral actions of IFN-gamma.
authors.affiliation: Cancer Research Institute, University of California, San Francisco, USA.
authors.forename: I
authors.initials: I
authors.lastname: Raineri
authors.forename: T T
authors.initials: TT
authors.lastname: Huang
authors.forename: C J
authors.initials: CJ
authors.lastname: Epstein
authors.forename: L B
authors.initials: LB
authors.lastname: Epstein
mesh_terms: D000998:Antiviral Agents / Q000037:antagonists & inhibitors*; D002999:Clone Cells; D006801:Humans; D007370:Interferon Type I / Q000037:antagonists & inhibitors*; D007371:Interferon-gamma / Q000037:antagonists & inhibitors*; D008545:Melanoma / Q000188:drug therapy; D016372:RNA, Antisense / Q000494:pharmacology*; D012333:RNA, Messenger / Q000235:genetics*; D011994:Recombinant Proteins; D018353:Rhabdoviridae Infections / Q000821:virology; D013482:Superoxide Dismutase / Q000235:genetics*; D014162:Transfection; D014407:Tumor Cells, Cultured; D014721:Vesicular stomatitis Indiana virus / Q000502:physiology
chemical_list: D000998:Antiviral Agents; D007370:Interferon Type I; D016372:RNA, Antisense; D012333:RNA, Messenger; D011994:Recombinant Proteins; D007371:Interferon-gamma; D013482:Superoxide Dismutase