title: Cre-lox-regulated conditional RNA interference from transgenes.
abstract: We have generated two lentiviral vectors for conditional, Cre-lox-regulated, RNA interference. One vector allows for conditional activation, whereas the other permits conditional inactivation of short hairpin RNA (shRNA) expression. The former is based on a strategy in which the mouse U6 promoter has been modified by including a hybrid between a LoxP site and a TATA box. The ability to efficiently control shRNA expression by using these vectors was shown in cell-based experiments by knocking down p53, nucleophosmin and DNA methyltransferase 1. We also demonstrate the usefulness of this approach to achieve conditional, tissue-specific RNA interference in Cre-expressing transgenic mice. Combined with the growing array of Cre expression strategies, these vectors allow spatial and temporal control of shRNA expression in vivo and should facilitate functional genetic analysis in mammals.
authors.affiliation: Department of Biology, Center for Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
authors.forename: Andrea
authors.initials: A
authors.lastname: Ventura
authors.forename: Alexander
authors.initials: A
authors.lastname: Meissner
authors.forename: Christopher P
authors.initials: CP
authors.lastname: Dillon
authors.forename: Michael
authors.initials: M
authors.lastname: McManus
authors.forename: Phillip A
authors.initials: PA
authors.lastname: Sharp
authors.forename: Luk
authors.initials: L
authors.lastname: Van Parijs
authors.forename: Rudolf
authors.initials: R
authors.lastname: Jaenisch
authors.forename: Tyler
authors.initials: T
authors.lastname: Jacks
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D005822:Genetic Vectors / Q000235:genetics*; D019426:Integrases / Q000235:genetics*; D016086:Lentivirus / Q000235:genetics*; D051379:Mice; D008822:Mice, Transgenic; D008969:Molecular Sequence Data; D009687:Nuclear Proteins / Q000235:genetics; D000090243:Nucleophosmin; D034622:RNA Interference; D012097:Repressor Proteins / Q000235:genetics; D019076:Transgenes / Q000235:genetics*; D016159:Tumor Suppressor Protein p53 / Q000235:genetics; D014764:Viral Proteins / Q000235:genetics*
chemical_list: C411744:DMAP1 protein, human; C485852:Dmap1 protein, mouse; C000716967:NPM1 protein, human; D009687:Nuclear Proteins; D012097:Repressor Proteins; D016159:Tumor Suppressor Protein p53; D014764:Viral Proteins; D000090243:Nucleophosmin; C045073:Cre recombinase; D019426:Integrases