title: Interferon induction by viruses and polynucleotides: a differential effect of comptothecin.
abstract: The plant alkaloid comptothecin inhibits interferon production induced by Newcastle disease virus (NDV) or ultraviolet-irradiated NDV in chick and human cells, and by Sindbis virus in chick cells. It has no effect on interferon production induced by poly (rI).poly(rC) in chick and human cells. No effect of comptothecin could be detected on the multiplication of NDV, and it is concluded that the inhibition reflects a difference between interferon induction by viruses and by polynucleotides.
mesh_terms: D000818:Animals; D002166:Camptothecin / Q000494:pharmacology*; D002642:Chick Embryo; D046508:Culture Techniques; D006801:Humans; D007372:Interferons / Q000096:biosynthesis*; D009522:Newcastle disease virus / Q000254:growth & development* / Q000528:radiation effects; D011070:Poly I-C / Q000494:pharmacology*; D014176:Protein Biosynthesis; D012313:RNA / Q000096:biosynthesis; D011830:Radiation Effects; D012845:Sindbis Virus / Q000254:growth & development*; D014466:Ultraviolet Rays; D014779:Virus Replication / Q000187:drug effects
chemical_list: D012313:RNA; D007372:Interferons; D011070:Poly I-C; D002166:Camptothecin