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FLT3 tyrosine kinase is a potential drug target in acute myeloid leukemia (AML) because patients with FLT3-ITD mutations respond poorly to standard cytotoxic agents and there is a clear link between the disease and the oncogenic properties of FLT3. We present novel 2,6,9-trisubstituted purine derivatives with potent FLT3 inhibitory activity. The lead compound 7d displays nanomolar activity in biochemical assays and selectively blocks proliferation of AML cell lines harboring FLT3-ITD mutations, whereas other transformed and normal human cells are several orders of magnitude less sensitive. The MV4-11 cells treated with 7d suppressed the phosphorylation of FLT3 and its downstream signaling pathways, with subsequent G1 cell cycle arrest and apoptosis. Additionally, a single dose of 7d in mice with subcutaneous MV4-11 xenografts caused sustained inhibition of FLT3 and STAT5 phosphorylation over 48 h, in contrast to the shorter effect observed after administration of the reference FLT3 inhibitor quizartinib.
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http://dx.doi.org/10.1021/acs.jmedchem.7b01529 | DOI Listing |
Expert Opin Ther Pat
December 2024
Biomedical Research Centre, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic.
Introduction: Approximately one-third of all AML patients have a mutation in the Fms-like tyrosine kinase 3 () gene, which is associated with a poor prognosis in these individuals. The 2017 approval of midostaurin, the first FLT3 inhibitor, spurred extensive development of more potent and selective inhibitors with an improved safety profile.
Areas Covered: This review analyzes patent inventions for the treatment of AML using FLT3 inhibitors, covering developments from the earliest to the most recent, disclosed in 2024.
Front Pediatr
December 2024
Laboratory of Translational Research, Children's Hospital of Brasília, Brasília, Brazil.
Introduction: There is consistent evidence that may be a driver gene in B-ALL and that selected cases may benefit from the use of FLT3 inhibitors. Our study was conducted to evaluate the frequency and types of FLT3 mutations in pediatric patients with B-ALL, the relative expression of this gene, and their influence on clinical evolution.
Methods: We evaluated 156 children with B-ALL treated between July 2018 and September 2023.
Bioorg Med Chem Lett
December 2024
Department of Medicinal Chemistry and Pharmaceutical Analysis, School of Pharmacy, Fourth Military Medical University, Xi'an, Shaanxi 710032, China. Electronic address:
FLT3-ITD and TKD mutants play a central role in acute myeloid leukemia (AML), making FLT3 an attractive target for AML treatment. To discover next-generation FLT3 inhibitors and gather additional structure-activity relationship (SAR) information, we performed structural modifications of G-749 (denfivontinib) utilizing structure simplification and scaffold hopping strategies. Among these derivatives, MY-10 exhibited the most potent and selective inhibition of MV4-11 cell proliferation, demonstrating potent inhibitory activity against FLT3-ITD (IC = 6.
View Article and Find Full Text PDFEur J Med Chem
December 2024
Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Medical University, Guiyang, 550004, China. Electronic address:
FMS-like tyrosine receptor kinase 3 (FLT3) mutations, the most common genetic alterations found in acute myeloid leukemia (AML) patients, have been pursued as an ideal drug discovery target for the AML therapy. Taking compound 2 as lead, a series of pyridine derivatives bearing 1,2,3-triazole moiety were rationally designed and synthesized. The bioassays confirmed that these derivatives exerted potent antileukemia effects, and compound 12y was found to be the most potent one.
View Article and Find Full Text PDFTransl Cancer Res
November 2024
Department of Laboratory Medicine, Changzhou Children's Hospital Affiliated to Nantong University, Changzhou, China.
Background: The use of FMS-like tyrosine kinase 3 () as a crucial target for kinase inhibitors is well established, but its association with immune infiltration remains unclear. This study aimed to explore the relationship between mutations and immune checkpoint molecules (ICMs) in patients with acute myeloid leukemia (AML).
Methods: The Cancer Genome Atlas (TCGA) and Genotype-Tissue Expression (GTEx) databases were used to identify the ICMs associated with mutations.
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