Abstract
Resistance to anaplastic lymphoma kinase (ALK)-targeted therapy in ALK-positive non-small cell lung cancer has been reported, with the majority of acquired resistance mechanisms relying on bypass signaling. To proactively identify resistance mechanisms in ALK-positive neuroblastoma (NB), we herein employ genome-wide CRISPR activation screens of NB cell lines treated with brigatinib or ceritinib, identifying PIM1 as a putative resistance gene, whose high expression is associated with high-risk disease and poor survival. Knockdown of PIM1 sensitizes cells of differing MYCN status to ALK inhibitors, and in patient-derived xenografts of high-risk NB harboring ALK mutations, the combination of the ALK inhibitor ceritinib and PIM1 inhibitor AZD1208 shows significantly enhanced anti-tumor efficacy relative to single agents. These data confirm that PIM1 overexpression decreases sensitivity to ALK inhibitors in NB, and suggests that combined front-line inhibition of ALK and PIM1 is a viable strategy for the treatment of ALK-positive NB independent of MYCN status.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Anaplastic Lymphoma Kinase / antagonists & inhibitors*
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Anaplastic Lymphoma Kinase / genetics
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Animals
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Apoptosis / drug effects
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Biphenyl Compounds / pharmacology
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Cell Line, Tumor
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Drug Resistance, Neoplasm / genetics*
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Gene Knockdown Techniques
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Humans
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Mice
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N-Myc Proto-Oncogene Protein / genetics
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Neuroblastoma / drug therapy
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Neuroblastoma / genetics*
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Organophosphorus Compounds / therapeutic use
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Protein Kinase Inhibitors / pharmacology
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Protein Kinase Inhibitors / therapeutic use
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Proto-Oncogene Proteins c-pim-1 / antagonists & inhibitors
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Proto-Oncogene Proteins c-pim-1 / genetics*
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Pyrimidines / pharmacology
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Pyrimidines / therapeutic use
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Sulfones / pharmacology
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Sulfones / therapeutic use
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Thiazolidines / pharmacology
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Xenograft Model Antitumor Assays
Substances
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AZD1208
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Biphenyl Compounds
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MYCN protein, human
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N-Myc Proto-Oncogene Protein
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Organophosphorus Compounds
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Protein Kinase Inhibitors
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Pyrimidines
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Sulfones
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Thiazolidines
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ALK protein, human
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Anaplastic Lymphoma Kinase
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PIM1 protein, human
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Proto-Oncogene Proteins c-pim-1
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brigatinib
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ceritinib