Abstract
Intratumoral heterogeneity of signaling networks may contribute to targeted cancer therapy resistance, including in the highly lethal brain cancer glioblastoma (GBM). We performed single-cell phosphoproteomics on a patient-derived in vivo GBM model of mTOR kinase inhibitor resistance and coupled it to an analytical approach for detecting changes in signaling coordination. Alterations in the protein signaling coordination were resolved as early as 2.5 days after treatment, anticipating drug resistance long before it was clinically manifest. Combination therapies were identified that resulted in complete and sustained tumor suppression in vivo. This approach may identify actionable alterations in signal coordination that underlie adaptive resistance, which can be suppressed through combination drug therapy, including non-obvious drug combinations.
Copyright © 2016 Elsevier Inc. All rights reserved.
Publication types
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
MeSH terms
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Adaptation, Physiological
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Animals
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Antineoplastic Combined Chemotherapy Protocols / pharmacology
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Antineoplastic Combined Chemotherapy Protocols / therapeutic use*
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Brain Neoplasms / drug therapy
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Brain Neoplasms / metabolism*
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Brain Neoplasms / pathology
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Butadienes / administration & dosage
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Dasatinib / administration & dosage
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Drug Resistance, Neoplasm
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Drug Synergism
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ErbB Receptors / antagonists & inhibitors
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ErbB Receptors / physiology
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Gene Expression Profiling
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Genes, erbB-1
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Glioblastoma / drug therapy
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Glioblastoma / metabolism*
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Glioblastoma / pathology
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Humans
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Mechanistic Target of Rapamycin Complex 1
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Mechanistic Target of Rapamycin Complex 2
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Mice
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Models, Biological
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Molecular Targeted Therapy*
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Multiprotein Complexes / antagonists & inhibitors
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Multiprotein Complexes / physiology
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Mutation
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Neoplasm Proteins / antagonists & inhibitors
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Neoplasm Proteins / genetics
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Neoplasm Proteins / metabolism*
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Nitriles / administration & dosage
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Phosphoproteins / metabolism*
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Protein Kinase Inhibitors / therapeutic use*
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Proteomics / methods*
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Pyrazines / administration & dosage
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Selection, Genetic
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Signal Transduction / drug effects
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Single-Cell Analysis / methods*
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TOR Serine-Threonine Kinases / antagonists & inhibitors
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TOR Serine-Threonine Kinases / physiology
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Xenograft Model Antitumor Assays
Substances
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Butadienes
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CC214-2
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Multiprotein Complexes
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Neoplasm Proteins
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Nitriles
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Phosphoproteins
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Protein Kinase Inhibitors
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Pyrazines
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U 0126
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EGFR protein, human
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ErbB Receptors
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Mechanistic Target of Rapamycin Complex 1
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Mechanistic Target of Rapamycin Complex 2
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TOR Serine-Threonine Kinases
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Dasatinib