Targeted genetic dependency screen facilitates identification of actionable mutations in FGFR4, MAP3K9, and PAK5 in lung cancer.

Proc Natl Acad Sci U S A 2013 Jul 8;110(30):12426-31. Epub 2013 Jul 8.

Signalling Networks in Cancer Group, Cancer Research UK, Paterson Institute for Cancer Research, University of Manchester, Manchester M20 4BX, United Kingdom.

Approximately 70% of patients with non-small-cell lung cancer present with late-stage disease and have limited treatment options, so there is a pressing need to develop efficacious targeted therapies for these patients. This remains a major challenge as the underlying genetic causes of ~50% of non-small-cell lung cancers remain unknown. Here we demonstrate that a targeted genetic dependency screen is an efficient approach to identify somatic cancer alterations that are functionally important. By using this approach, we have identified three kinases with gain-of-function mutations in lung cancer, namely FGFR4, MAP3K9, and PAK5. Mutations in these kinases are activating toward the ERK pathway, and targeted depletion of the mutated kinases inhibits proliferation, suppresses constitutive activation of downstream signaling pathways, and results in specific killing of the lung cancer cells. Genomic profiling of patients with lung cancer is ushering in an era of personalized medicine; however, lack of actionable mutations presents a significant hurdle. Our study indicates that targeted genetic dependency screens will be an effective strategy to elucidate somatic variants that are essential for lung cancer cell viability.

Download full-text PDF

Source
http://dx.doi.org/10.1073/pnas.1305207110DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3725071PMC
July 2013

Publication Analysis

Top Keywords

lung cancer
24
targeted genetic
12
genetic dependency
12
fgfr4 map3k9
8
map3k9 pak5
8
actionable mutations
8
non-small-cell lung
8
dependency screen
8
cancer
7
lung
7
targeted
5
targeted depletion
4
depletion mutated
4
efficient approach
4
erk pathway
4
activating erk
4
mutated kinases
4
pathway targeted
4
inhibits proliferation
4
activation downstream
4

Similar Publications