Abstract
Axl is a new potential target for anticancer drug discovery. A series of 4-oxo-1,4-dihydroquinoline-3-carboxamides were designed and synthesized as highly potent Axl kinase inhibitors. One of the most promising compounds, 9im, tightly bound with Axl protein and potently inhibited its kinase function with a Kd value of 2.7 nM and an IC50 value of 4.0 nM, respectively, while was obviously less potent against most of the 403 wild-type kinases evaluated at a relatively high concentration. The compound dose-dependently inhibited the TGF-β1-induced epithelial-mesenchymal transition (EMT) and suppressed the migration and invasion of MDA-MB-231 breast cancer cells. In addition, 9im also demonstrated reasonable pharmacokinetics properties in rats and exhibited in vivo therapeutic effect on hepatic metastasis in a xenograft model of highly metastatic 4T1 murine breast cancer cells. Compound 9im may serve as a lead compound for new anticancer drug discovery and a valuable research probe for further biological investigation on Axl.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Antineoplastic Agents / chemical synthesis
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Antineoplastic Agents / chemistry
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Antineoplastic Agents / pharmacology*
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Axl Receptor Tyrosine Kinase
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Cell Line, Tumor
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Cell Movement / drug effects
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Cell Proliferation / drug effects
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Dose-Response Relationship, Drug
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Female
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Humans
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Male
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Mammary Neoplasms, Experimental / drug therapy
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Mammary Neoplasms, Experimental / pathology
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Mice
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Mice, Inbred BALB C
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Molecular Structure
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Protein Kinase Inhibitors / chemical synthesis
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Protein Kinase Inhibitors / chemistry
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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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Quinolines / chemical synthesis
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Quinolines / chemistry
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Quinolines / pharmacology*
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Rats
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Rats, Sprague-Dawley
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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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Wound Healing / drug effects
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Xenograft Model Antitumor Assays
Substances
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4-oxo-1,4-dihydroquinoline-3-carboxamide
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Antineoplastic Agents
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Protein Kinase Inhibitors
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Proto-Oncogene Proteins
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Quinolines
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Receptor Protein-Tyrosine Kinases
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Axl Receptor Tyrosine Kinase