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A Functional Landscape of Resistance to ALK Inhibition in Lung Cancer
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Published Date:
Mar 09 2015
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Source:Cancer Cell. 2015; 27(3):397-408
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Language:English
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[PDF-2.41 MB]
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Alternative Title:Cancer Cell
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Description:We conducted a large-scale functional genetic study to characterize mechanisms of resistance to ALK inhibition in ALK-dependent lung cancer cells. We identify members of known resistance pathways and additional putative resistance drivers. Among the latter were members of the P2Y purinergic receptor family of G-protein-coupled receptors (P2Y1, P2Y2, and P2Y6). P2Y receptors mediated resistance in part through a protein-kinase-C (PKC)-dependent mechanism. Moreover, PKC activation alone was sufficient to confer resistance to ALK inhibitors, whereas combined ALK and PKC inhibition restored sensitivity. We observed enrichment of gene signatures associated with several resistance drivers (including P2Y receptors) in crizotinib-resistant ALK-rearranged lung tumors compared to treatment-naive controls, supporting a role for these identified mechanisms in clinical ALK inhibitor resistance.
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Pubmed ID:25759024
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Pubmed Central ID:PMC4398996
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