Background:
Overactivity of fibroblast growth factor receptor 1 (FGFR1) is associated with various tumors, particularly breast cancer, prostate cancer, non-small-cell lung carcinoma, myeloproliferative diseases, which makes this protein kinase a promising therapeutic target for anticancer therapy.
Objective:
The main aim of this study is to identify novel FGFR1 inhibitors.
Method:
In order to find FGFR1 inhibitors, virtual screening experiments were performed using AutoDock software. Best-scored compounds were tested in vitro using P32 radioactive kinase assay.
Results:
Small-molecular inhibitors of protein kinase FGFR1 were identified among indazole derivatives. The most active compound [3-(3,4-dichloro-phenyl)-1H-indazol-5-yl]-(2,3-dihydro-1H-cyclopenta[b]quinolin-9-yl)-amine (1) inhibits FGFR1 with IC50 value of 100 nM. According to molecular docking results, this compound interacts simultaneously with adenine- and phosphate-binding regions of protein kinase FGFR1. The structure-activity relationships have been investigated and binding mode has been predicted.
Conclusion:
The compound 1 can be used for further structural optimization and biological research.
Aurone derivatives possessing a wide range of biological activities are of high interest in medicinal chemistry. Carboxylated aurones were found previously to inhibit xanthine oxidase, which is a potential target for treatment of hyperuricemia and gout. In this paper, a series of B-ring nitro-substituted aurone derivatives were studied in vitro as inhibitors of this enzyme. The introduction of hydroxyl group into the B-ring of nitro-functionalized aurones resulted in significant increase of their inhibitory potency. At the same time, aurones chlorinated at ring A and containing nitro and hydroxyl groups at ring B showed only slightly increased inhibition effect. The kinetic studies and molecular docking calculations were carried out to explain the inhibition mechanism of xanthine oxidase by the nitro-substituted aurone derivatives
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