Discovery and characterization of a novel highly potent and selective type II native and drug-resistant V299L mutant BCR-ABL inhibitor (CHMFL-ABL-039) for Chronic Myeloid Leukemia (CML)

Cancer Biol Ther. 2019;20(6):877-885. doi: 10.1080/15384047.2019.1579958. Epub 2019 Mar 20.

Abstract

BCR fused ABL kinase is the critical driving oncogene for chronic myeloid leukemia (CML) and has been extensively studied as the drug discovery target in the past decade. The successful introduction of tyrosine kinase inhibitors (TKI) such as Imatinib, Dasatinib and Bosutinib has greatly improved the CML patient survival rate. However, upon the chronic treatment, a variety of TKI resistant mutants, such as the V299L mutant which has been found in more and more patients with the high-throughput sequencing technology, are observed, although the incidence is still considered rare compared to the more prevalent gatekeeper T315I mutant. However, with the progress of the precision medicine concept, the rare mutation (or the orphan drug target) has attracted more and more attention. Here we report a novel type II BCR-ABL kinase inhibitor, CHMFL-ABL-039, which not only displayed great potency (IC50: 7.9 nM) and selectivity (S score (1) = 0.02) against native ABL kinase among other kinases in the kinome, but also exhibited great potency (IC50: 27.9 nM) and selectivity against Imatinib-resistant V299L mutant among other frequently observed ABL kinase mutants. CHMFL-ABL-039 has demonstrated greater efficacies than Imatinib regarding to the anti-proliferation, inhibition of the signaling pathway, arrest of cell cycle progression, induction of apoptosis in vitro and suppression of the tumor progression in vivo in the native and V299L mutated BCR-ABL kinase-driven cells/xenograft models. It would be a useful pharmacological tool to study the TKI resistant ABL V299L mutant-mediated pathology and provide a potential precise treatment approach for this orphan CML subtype in the precision medicine era.

Keywords: BCR-ABL; PDGFR; chronic myeloid leukemia; kinase inhibitor.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alleles
  • Amino Acid Substitution*
  • Animals
  • Apoptosis / drug effects
  • Apoptosis / genetics
  • Cell Line, Tumor
  • Cell Proliferation / drug effects
  • Disease Models, Animal
  • Drug Resistance, Neoplasm / genetics*
  • Fusion Proteins, bcr-abl / genetics*
  • Humans
  • Leukemia, Myelogenous, Chronic, BCR-ABL Positive / drug therapy
  • Leukemia, Myelogenous, Chronic, BCR-ABL Positive / genetics*
  • Mice
  • Mutation*
  • Protein Kinase Inhibitors / chemistry
  • Protein Kinase Inhibitors / pharmacology*
  • Protein Kinase Inhibitors / therapeutic use
  • Signal Transduction / drug effects
  • Xenograft Model Antitumor Assays

Substances

  • Protein Kinase Inhibitors
  • Fusion Proteins, bcr-abl

Grant support

This work was supported by the National Natural Science Foundation of China [81471773]; the National Natural Science Foundation of China [81473088]; the National Natural Science Foundation of China [2140207]; the Natural Science Foundation of Anhui province [1508085MB23]; the Natural Science Foundation of Anhui province [1608085QH180]; the Natural Science Foundation of Anhui province [1708085MH208].