Cre-lox-regulated conditional RNA interference from transgenes

Proc Natl Acad Sci U S A. 2004 Jul 13;101(28):10380-5. doi: 10.1073/pnas.0403954101. Epub 2004 Jul 6.


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.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Genetic Vectors / genetics*
  • Integrases / genetics*
  • Lentivirus / genetics*
  • Mice
  • Mice, Transgenic
  • Molecular Sequence Data
  • Nuclear Proteins / genetics
  • Nucleophosmin
  • RNA Interference*
  • Repressor Proteins / genetics
  • Transgenes / genetics*
  • Tumor Suppressor Protein p53 / genetics
  • Viral Proteins / genetics*


  • DMAP1 protein, human
  • Dmap1 protein, mouse
  • NPM1 protein, human
  • Nuclear Proteins
  • Repressor Proteins
  • Tumor Suppressor Protein p53
  • Viral Proteins
  • Nucleophosmin
  • Cre recombinase
  • Integrases