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2018 ; 215
(3
): 985-997
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Optimized RNP transfection for highly efficient CRISPR/Cas9-mediated gene
knockout in primary T cells
#MMPMID29436394
Seki A
; Rutz S
J Exp Med
2018[Mar]; 215
(3
): 985-997
PMID29436394
show ga
CRISPR (clustered, regularly interspaced, short palindromic repeats)/Cas9
(CRISPR-associated protein 9) has become the tool of choice for generating gene
knockouts across a variety of species. The ability for efficient gene editing in
primary T cells not only represents a valuable research tool to study gene
function but also holds great promise for T cell-based immunotherapies, such as
next-generation chimeric antigen receptor (CAR) T cells. Previous attempts to
apply CRIPSR/Cas9 for gene editing in primary T cells have resulted in highly
variable knockout efficiency and required T cell receptor (TCR) stimulation, thus
largely precluding the study of genes involved in T cell activation or
differentiation. Here, we describe an optimized approach for Cas9/RNP
transfection of primary mouse and human T cells without TCR stimulation that
results in near complete loss of target gene expression at the population level,
mitigating the need for selection. We believe that this method will greatly
extend the feasibly of target gene discovery and validation in primary T cells
and simplify the gene editing process for next-generation immunotherapies.