title: Using double-stranded RNA to prevent in vitro and in vivo viral infections by recombinant baculovirus.
abstract: Introduction of double-stranded RNA (dsRNA) into a wide variety of cells and organisms results in post-transcriptional depletion of the homologue endogenous mRNA. This well-preserved phenomenon known as RNA interference (RNAi) is present in evolutionarily diverse organisms such as plants, fungi, insects, metazoans, and mammals. Because the identification of the targeted mRNA by the RNAi machinery depends upon Watson-Crick base-pairing interactions, RNAi can be exquisitely specific. We took advantage of this powerful and flexible technique to demonstrate that selective silencing of genes essential for viral propagation prevents in vitro and in vivo viral infection. Using the baculovirus Autographa californica, a rapidly replicating and highly cytolytic double-stranded DNA virus that infects many different insect species, we show for the first time that introduction of dsRNA from gp64 and ie1, two genes essential for baculovirus propagation, results in prevention of viral infection in vitro and in vivo. This is the first report demonstrating the use of RNAi to inhibit a viral infection in animals. This inhibition was specific, because dsRNA from the polyhedrin promoter (used as control) or unrelated dsRNAs did not affect the time course of viral infection. The most relevant consequences from the present study are: 1) RNAi offers a rapid and efficient way to interfere with viral genes to assess the role of specific proteins in viral function and 2) using RNAi to interfere with viral genes essential for cell infection may provide a powerful therapeutic tool for the treatment of viral infections.
authors.affiliation: Departamento de Biología Celular, Instituto de Fisiología Celular, Universidad Nacional Autonoma de Mexico, México City DF 04510, Mexico.
authors.forename: Victor Julian
authors.initials: VJ
authors.lastname: Valdes
authors.forename: Alicia
authors.initials: A
authors.lastname: Sampieri
authors.forename: Jorge
authors.initials: J
authors.lastname: Sepulveda
authors.forename: Luis
authors.initials: L
authors.lastname: Vaca
mesh_terms: D000818:Animals; D016367:Baculoviridae / Q000235:genetics*; D002460:Cell Line; D001517:Coleoptera / Q000821:virology; D004268:DNA-Binding Proteins; D005434:Flow Cytometry; D015870:Gene Expression; D005814:Genes, Viral / Q000235:genetics; D049452:Green Fluorescent Proteins; D017874:Immediate-Early Proteins / Q000235:genetics; D007814:Larva / Q000821:virology; D008164:Luminescent Proteins / Q000235:genetics; D018613:Microscopy, Confocal; D008854:Microscopy, Electron; D034622:RNA Interference; D012330:RNA, Double-Stranded / Q000008:administration & dosage / Q000235:genetics*; D011993:Recombinant Fusion Proteins; D020133:Reverse Transcriptase Polymerase Chain Reaction; D018411:Spodoptera / Q000378:metabolism; D015534:Trans-Activators / Q000235:genetics; D014162:Transfection; D014760:Viral Fusion Proteins / Q000235:genetics; D014777:Virus Diseases / Q000517:prevention & control*; D001616:beta-Galactosidase / Q000235:genetics / Q000378:metabolism
chemical_list: C069183:Ac-IE-1 protein, Autographa californica nucleopolyhedrovirus; D004268:DNA-Binding Proteins; D017874:Immediate-Early Proteins; D008164:Luminescent Proteins; D012330:RNA, Double-Stranded; D011993:Recombinant Fusion Proteins; D015534:Trans-Activators; D014760:Viral Fusion Proteins; D049452:Green Fluorescent Proteins; D001616:beta-Galactosidase