Abstract
RNA interference (RNAi) is a powerful gene-knockdown technology that has been applied for functional genetic loss-of-function studies in many model eukaryotic systems, including embryonic stem cells (ESCs). Application of RNAi in ESCs allows for dissection of mechanisms by which ESCs self-renew and maintain pluripotency, and also specifying particular cell types needed for cell-replacement therapies. Potent RNAi response can be induced by expression of an microRNA-embedded short-hairpin RNA (shRNA(mir)) cassette that is integrated in the genome by virus infection or site-specific recombination at a defined locus. In this chapter, I will provide detailed protocols to perform shRNA(mir)-mediated RNAi studies in mouse ESCs using retrovirus infection and loxP site-directed recombination for efficient constitutive and inducible gene knockdown, respectively.
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