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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Biotechnol
2017 ; 35
(5
): 463-474
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Synergistic drug combinations for cancer identified in a CRISPR screen for
pairwise genetic interactions
#MMPMID28319085
Han K
; Jeng EE
; Hess GT
; Morgens DW
; Li A
; Bassik MC
Nat Biotechnol
2017[May]; 35
(5
): 463-474
PMID28319085
show ga
Identification of effective combination therapies is critical to address the
emergence of drug-resistant cancers, but direct screening of all possible drug
combinations is infeasible. Here we introduce a CRISPR-based double knockout
(CDKO) system that improves the efficiency of combinatorial genetic screening
using an effective strategy for cloning and sequencing paired single guide RNA
(sgRNA) libraries and a robust statistical scoring method for calculating genetic
interactions (GIs) from CRISPR-deleted gene pairs. We applied CDKO to generate a
large-scale human GI map, comprising 490,000 double-sgRNAs directed against
21,321 pairs of drug targets in K562 leukemia cells and identified synthetic
lethal drug target pairs for which corresponding drugs exhibit synergistic
killing. These included the BCL2L1 and MCL1 combination, which was also effective
in imatinib-resistant cells. We further validated this system by identifying
known and previously unidentified GIs between modifiers of ricin toxicity. This
work provides an effective strategy to screen synergistic drug combinations in
high-throughput and a CRISPR-based tool to dissect functional GI networks.