A single lentiviral vector platform for microRNA-based conditional RNA interference and coordinated transgene expression.

Abstract

RNAi is proving to be a powerful experimental tool for the functional annotation of mammalian genomes. The full potential of this technology will be realized through development of approaches permitting regulated manipulation of endogenous gene expression with coordinated reexpression of exogenous transgenes. We describe the development of a lentiviral vector platform, pSLIK (single lentivector for inducible knockdown), which permits tetracycline-regulated expression of microRNA-like short hairpin RNAs from a single viral infection of any naïve cell system. In mouse embryonic fibroblasts, the pSLIK platform was used to conditionally deplete the expression of the heterotrimeric G proteins Galpha12 and Galpha13 both singly and in combination, demonstrating the Galpha13 dependence of serum response element-mediated transcription. In RAW264.7 macrophages, regulated knockdown of Gbeta2 correlated with a reduced Ca(2+) response to C5a. Insertion of a GFP transgene upstream of the Gbeta2 microRNA-like short hairpin RNA allowed concomitant reexpression of a heterologous mRNA during tetracycline-dependent target gene knockdown, significantly enhancing the experimental applicability of the pSLIK system.

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@article{Shin2006ASL, title={A single lentiviral vector platform for microRNA-based conditional RNA interference and coordinated transgene expression.}, author={Kum-Joo Shin and Estelle A. Wall and Joelle R. Zavzavadjian and Leah A. Santat and Jamie Liu and Jong-Ik Hwang and Robert A. Rebres and Tamara I. Roach and William E. Seaman and Melvin I. Simon and Iain D. C. Fraser}, journal={Proceedings of the National Academy of Sciences of the United States of America}, year={2006}, volume={103 37}, pages={13759-64} }