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• W3115289544 endingPage "129844" @default.
• W3115289544 startingPage "129844" @default.
• W3115289544 abstract "In this study, guadiscine (G1) and guadiscidine (G2), 7,7-dimethylaporphine alkaloids from Guatteria friesiana, have they geometric paramaters, vibrational behavior and quantum chemical properties (HOMO-LUMO, MEP, ALIE and Fukui indices) analyzed through a theoretical view, by density functional theory (DFT), using the Becker's three-parameter hybrid exchange functional combined with the Lee–Yang–Parr correlation functional (B3LYP) and 6–311G(2d,p) and 6–311G++(2df,3p) basis sets. The obtained geometry data were compared with x-ray data for (−)-N-acetyl-anonaine, showing close values. Vibrational analysis, together with potential energy distribution (PED) calculations, revealed several characteristic vibrations that characterize the 7,7 dimethylaporphine skeleton, besides enabling the observation of intermolecular H-bonds through dimers formation. Molecular dynamic simulations were carried out, allowing to evaluate the solvation free energies of G1 and G2 in water, methanol and ethanol, as well as H-bonds formation between G1 and G2 and the tested solvents. The antineoplastic potential of the title molecules was evaluated via molecular docking calculations with topoisomerase I complexed with DNA. Guadiscine and guadiscidine showed, respectively, binding free energies of -8.0 and -8.5 kcal/mol, while topotecan, a DNA topoisomerase I inhibitor, showed a binding free energy value of -12 kcal/mol, indicating that the studied molecules are good topoisomerase I inhibitors. In vitro cytotoxicity assay with HepG2 cell line were performed, revealing significant antitumor potential for G2." @default.
• W3115289544 created "2021-01-05" @default.
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• W3115289544 date "2021-04-01" @default.
• W3115289544 modified "2023-10-18" @default.
• W3115289544 title "Experimental and theoretical study on spectral features, reactivity, solvation, topoisomerase I inhibition and in vitro cytotoxicity in human HepG2 cells of guadiscine and guadiscidine aporphine alkaloids" @default.
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• W3115289544 doi "https://doi.org/10.1016/j.molstruc.2020.129844" @default.
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