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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Proc+Natl+Acad+Sci+U+S+A 2017 ; 114 (4): 722-7 Nephropedia Template TP
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piggyBac mediates efficient in vivo CRISPR library screening for tumorigenesis in mice #MMPMID28062688
Xu C; Qi X; Du X; Zou H; Gao F; Feng T; Lu H; Li S; An X; Zhang L; Wu Y; Liu Y; Li N; Capecchi MR; Wu S
Proc Natl Acad Sci U S A 2017[Jan]; 114 (4): 722-7 PMID28062688show ga
Because genome-wide CRISPR/Cas9 libraries are mostly constructed in lentiviral vectors, direct in vivo screening has not been possible as a result of low efficiency in delivery. Here, we examined the piggyBac (PB) transposon as an alternative vehicle to deliver a guide RNA (gRNA) library for in vivo screening. Through hydrodynamic tail vein injections, we delivered a PB-CRISPR library into mouse liver. Rapid tumor formation could be observed in less than 2 mo. By sequencing analysis of PB-mediated gRNA insertions, we identified corresponding genes mediating tumorigenesis. Our results demonstrate that PB is a simple and nonviral choice for efficient in vivo delivery of CRISPR libraries for phenotype-driven screens.