Abstract
The TAM kinase family arises as a new effective and attractive therapeutic target for cancer therapy, autoimmune and viral diseases. A series of 2,6-disubstituted imidazo[4,5-b]pyridines were designed, synthesized and identified as highly potent TAM inhibitors. Despite remarkable structural similarities within the TAM family, compounds 28 and 25 demonstrated high activity and selectivity in vitro against AXL and MER, with IC50 value of 0.77 nM and 9 nM respectively and a 120- to 900-fold selectivity. We also observed an unexpected nuclear localization for compound 10Bb, thanks to nanoSIMS technology, which could be correlated to the absence of cytotoxicity on three different cancer cell lines being sensitive to TAM inhibition.
Keywords:
AXL; Imidazopyridines; Kinase inhibitors; MER; NanoSIMS imaging; TYRO3.
Copyright © 2018 Elsevier Ltd. All rights reserved.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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A549 Cells
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Axl Receptor Tyrosine Kinase
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Drug Design
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Humans
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Imidazoles / chemical synthesis
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Imidazoles / chemistry*
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Imidazoles / pharmacokinetics
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Imidazoles / pharmacology*
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Models, Molecular
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Protein Kinase Inhibitors / chemical synthesis
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Protein Kinase Inhibitors / chemistry*
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Protein Kinase Inhibitors / pharmacokinetics
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Protein Kinase Inhibitors / pharmacology*
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Proto-Oncogene Proteins / antagonists & inhibitors*
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Proto-Oncogene Proteins / metabolism
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Pyridines / chemical synthesis
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Pyridines / chemistry*
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Pyridines / pharmacokinetics
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Pyridines / pharmacology*
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Receptor Protein-Tyrosine Kinases / antagonists & inhibitors*
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Receptor Protein-Tyrosine Kinases / metabolism
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Structure-Activity Relationship
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c-Mer Tyrosine Kinase / antagonists & inhibitors*
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c-Mer Tyrosine Kinase / metabolism
Substances
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Imidazoles
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Protein Kinase Inhibitors
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Proto-Oncogene Proteins
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Pyridines
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imidazopyridine
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MERTK protein, human
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Receptor Protein-Tyrosine Kinases
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TYRO3 protein, human
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c-Mer Tyrosine Kinase
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Axl Receptor Tyrosine Kinase
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AXL protein, human