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Design, Synthesis, in Vitro Evaluation, and Molecular Dynamics Simulation Studies of Novel Coumarin-Acetohydrazide Schiff Base Derivatives As Urease Enzyme Inhibitors Publisher

Summary: Can new drugs stop H. pylori? Study finds coumarin-acetohydrazide derivatives potently inhibit urease. #HPylori #UreaseInhibitors

Azimi M1 ; Sepehrmansourie H2 ; Ebadi A1, 3 ; Chehardoli G1, 3 ; Zolfigol MA4 ; Amanlou M5 ; Nazari Montazer M5 ; Mahdavi M6 ; Najafi Z1, 3
Authors

Source: Medicinal Chemistry Research Published:2025


Abstract

Urease inhibition, a nickel-containing metalloenzyme, is a promising approach for treating Helicobacter pylori (H. pylori) infections as a critical virulence factor that allows the bacteria to colonize the gastric mucosa and survive the acidic environment of the stomach. In this context, we report the design, synthesis, in vitro evaluation, and molecular dynamics simulation (MD) studies of novel ((4,7-dimethyl-2-oxo-2H-chromen-5-yl)oxy)acetohydrazide derivatives as urease enzyme inhibitors. Notably, all compounds exhibited potent inhibitory activities, with IC50 values ranging from 2.438 µM to 4.427 µM. Further kinetic studies revealed that compound 11g as the most potent compound with IC50 value of 2.438 ± 0.31 μM acts as a non-competitive inhibitor toward urease with an inhibition constant (Ki) of 2.33 μM. In silico studies elucidated the binding interactions of compound 11g, revealing crucial hydrogen bonds with key amino acid residues as well as chelation with Ni ions within the active site of urease. Molecular dynamics (MD) simulations confirmed the stable ligand-urease complex maintains interactions with both the active site residues and the flap moiety of urease, acting as noncompetitive inhibitors. These findings demonstrate the potential of coumarin-acetohydrazide Schiff base derivatives as a new frontier in developing urease inhibitors. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2025.
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