title: Effect of indomethacin on Epstein-Barr virus early antigen induction.
abstract: The lymphoid cell line, Raji, was derived from a Burkitt's lymphoma and is readily inducible for Epstein-Barr virus (EBV) early antigen synthesis by the tumor promoter 12-O-tetradecanoylphorbol-13-acetate. Treatment of Raji and other EBV genome-positive cells with indomethacin caused a marked inhibition of early antigen induction by 12-O-tetradecanoylphorbol-13-acetate and other chemical inducers. However, this effect did not appear to be due to inhibition of prostaglandin synthesis since the concentration of indomethacin required to inhibit EBV-early antigen induction was 50- to 100-fold higher than that normally required for the inhibition of prostaglandin synthesis. In addition, no prostaglandin synthesis was detected in 12-O-tetradecanoylphorbol-13-acetate-treated Raji cells. EBV-early antigen induction by superinfection was resistant to inhibition by indomethacin and indicates that induction by chemical inducers and by super-infection follows different pathways. Indomethacin at the concentrations required to inhibit EBV-early antigen induction also was cytostatic, which indicates that the cell cycle phase may be an important factor in viral induction.
mesh_terms: D000956:Antigens, Viral / Q000235:genetics*; D002051:Burkitt Lymphoma; D002455:Cell Division / Q000187:drug effects; D002460:Cell Line; D004336:Drug Antagonism; D004854:Herpesvirus 4, Human / Q000187:drug effects / Q000276:immunology*; D006801:Humans; D007213:Indomethacin / Q000494:pharmacology*; D007700:Kinetics; D013755:Tetradecanoylphorbol Acetate / Q000633:toxicity
chemical_list: D000956:Antigens, Viral; C033305:Epstein-Barr virus early antigen; D013755:Tetradecanoylphorbol Acetate; D007213:Indomethacin