title: The plasmid constructs producing shRNA corresponding to the conserved 3D polymerase of Foot and Mouth Disease virus protects guinea pigs against challenge virus.
abstract: RNA interference (RNAi) has been used as an effective antiviral strategy for its specific silencing of viral gene expression in mammalian cells. In this study, shRNA targeting two regions of Foot and Mouth Disease Virus (FMDV) i.e. 3D and 5'UTR which are very essential in virus replication were evaluated. The constructs were made using h7K RNA polymerase III promoter. We investigated in vivo inhibitory effect of shRNA on FMDV replication in BHK-21 cells and guinea pigs. The results showed that transfection of 3D shRNA could reduce virus growth by three folds when cells were challenged with 10(2) TCID(50) of FMDV. Pretreated guinea pigs with 3DshRNA were protected 80% with 10(3) GPID(50) of FMDV. As a first report in guinea pigs which are recognized animal model for FMD vaccine potency testing, the study suggests that shRNA could be a viable therapeutic approach to control severity of FMD infection and spread.
authors.affiliation: Indian Veterinary Research Institute, Molecular Virology Lab, Bangalore, campus, Hebbal, Bangalore, 560024, India.
authors.forename: Dechamma Hosur
authors.initials: DH
authors.lastname: Joyappa
authors.forename: Sarika
authors.initials: S
authors.lastname: Sasi
authors.forename: Kumar C
authors.initials: KC
authors.lastname: Ashok
authors.forename: Golla Rama
authors.initials: GR
authors.lastname: Reddy
authors.forename: Veluvarthy V S
authors.initials: VV
authors.lastname: Suryanarayana
mesh_terms: D000818:Animals; D002460:Cell Line; D006224:Cricetinae; D012321:DNA-Directed RNA Polymerases / Q000235:genetics; D004195:Disease Models, Animal; D005536:Foot-and-Mouth Disease / Q000517:prevention & control* / Q000821:virology; D029544:Foot-and-Mouth Disease Virus / Q000201:enzymology / Q000235:genetics*; D006168:Guinea Pigs; D010957:Plasmids / Q000235:genetics; D034622:RNA Interference; D034741:RNA, Small Interfering / Q000235:genetics*; D012367:RNA, Viral / Q000235:genetics*; D014779:Virus Replication
chemical_list: D034741:RNA, Small Interfering; D012367:RNA, Viral; D012321:DNA-Directed RNA Polymerases