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Zahirović, Adnan; Hadžalić, Selma; Višnjevac, Aleksandar; Fočak, Muhamed; Tüzün, Burak; Žilić, Dijana; Roca, Sunčica; Jurec, Jurica; Topčagić, Anela; Osmanković, Irnesa
Journal of inorganic biochemistry, July 2023, 2023-07-00, 20230701, Letnik: 244Journal Article
Solution synthesis afforded five novel neutral heteroleptic octahedral paramagnetic mononuclear oxidovanadium(IV) complexes of general composition VO(bpy)L, where L is a dianionic tridentate ONO-donor hydrazone ligand derived from 2-furoic acid hydrazide and salicylaldehyde and its 5-substituted derivatives. Characterization was carried out by elemental analysis, mass spectrometry, infrared, electron, NMR, and EPR spectroscopy, cyclic voltammetry and conductometry. The molecular and crystal structure of the complex with 5-chloro-salicylaldehyde 2-furoic acid hydrazone (2) was determined. The quantum chemical properties of the vanadium complexes were studied at B3LYP and M062X levels with the lanl2dz basis set using Gaussian. Additionally, Swiss-ADME analysis was performed and complex (4), featuring a 5-nitro substituent on the hydrazone ligand, was selected for further investigation. The effects of the in vivo application of the complex on selected biochemical parameters in healthy and diabetic Wistar rats were investigated. Strong antidiabetic effect associated with moderate hypoalbuminemia was observed. Furthermore, the interaction of complexes with BSA was studied by spectrofluorimetry. A significant conformational change of BSA in the presence of vanadium complexes was found. Synchronous fluorescence spectra revealed significant changes in the tyrosine microenvironment of BSA. The FRET analysis was also used and the non-radiative process of energy transfer is elucidated. Thermodynamic data suggest van der Waals forces and hydrogen bonding as predominant binding modes of complexes to BSA. Display omitted •Five novel heteroleptic oxidovanadium(IV) hydrazone complexes are reported•Complex with nitro substituent showed promising antidiabetic properties in Wistar rats•Mild hypoalbuminemia was observed in vivo•Moderate affinity of complexes for albumin was found in vitro
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