Second-Order Scattering Quenching in Fluorescence Spectra of Natural Humates as a Tracer of Formation Stable Supramolecular System for the Delivery of Poorly Soluble Antiviral Drugs on the Example of Mangiferin and Favipiravir

Морозова, М. А.; Tumasov, Vladimir N.; Kazimova, Ilaha V.; Максимова, Т. В.; Uspenskaya, E. V.; Сыроешкин, А. В.

doi:10.3390/pharmaceutics14040767

Cited by 5 publications

(2 citation statements)

References 63 publications

(67 reference statements)

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“…Fluorescence is most efficiently excited at 280 nm, and the fluorescence intensity decreases continuously to λ ex of 460 nm. The blue fluorescence intensity clearly decreases significantly as the excitation wavelength increases, and this is consistent with numerous previously reported fluorescence intensity results. − Following extensive anion studies, in this stage, AIE studies of Bis-TPE were also carried out with increasing water content in ethanol. The colorimetric studies show that the color change shifted from colorless to bright orange with increasing water content.…”

Section: Resultssupporting

confidence: 89%

Synthesis of Bis-tetraphenylethene as a Novel Turn-On Selective Zinc Sensor

et al. 2023

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The main purpose of this study is the synthesis of novel fluorescent Bis-TPE and the investigation of its wide range of photochemical behaviors. For this purpose, initially, Bis-TPE was synthesized. Following this, the interactions of Bis-TPE with a wide range of ions were studied in EtOH using ultraviolet–visible (UV–vis) and fluorescence spectroscopy. As a result of all UV–vis and fluorescence studies, it was determined that Bis-TPE showed turn-on sensor features against Zn2+ ions. Moreover, the limit of detection (LOD) and K a values of Bis-TPE/Zn2+ were calculated as 0.97 μM (970 nM) and 3.76 × 105 M–1, respectively. Moreover, all reversal studies resulted in switchable on/off variation of the alternative addition of ZnCl2 and [Bu4N]OH to Bis-TPE. This result also implies that the probe Bis-TPE also exhibits specific OH– sensor properties in the presence of zinc.

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Section: Resultssupporting

confidence: 89%

Synthesis of Bis-tetraphenylethene as a Novel Turn-On Selective Zinc Sensor

et al. 2023

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“…Их большая молекулярная масса, повышенная липофильность, значительное количество ароматических колец увеличивают потребность в стратегиях улучшения биодоступности, выходящих за рамки одной лишь оптимизации соединения. Для облегчения пероральной биодоступности новых ЛС, дальнейшего расширения разнообразия и сложности молекул должны быть использованы технологии систем доставки лекарств наноразмерного диапазона [18][19][20].…”

Section: поиск и разработка новых лекарственных средствunclassified

Bioactive Xanthone C-glycoside Derivatives – QSAR Approach

Aksenova,

Morozova,

Syroeshkin

2023

Razrabotka i registraciâ lekarstvennyh sredstv

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Introduction. Xanthone glycosides have unique structures and properties. Many efforts focus on the search for C-glycoside derivatives of mangiferin with higher bioavailability. The application of the QSAR approach allows for the optimization of the search for novel xanthone derivatives with the desired characteristics.Aim. Using available descriptors of chemical structure, physical-chemical properties, and biological activity, analyze a sample set of known homologs and analogs of mangiferin to QSAR prognosis bioactivity of new xanthone C-glycosides.Materials and methods. 26 molecules of natural homologs and modified derivatives of mangiferin formed the analyzed sample set. Topological graphs of compounds were constructed using ChemicPen software. ChemicDescript software was used for the calculation of molecular descriptors, including the Balaban index. Physicochemical characteristics of molecules as well as Lipinski's rule criteria were calculated in Molinspiration. The spectrum of the most probable (Pa > 0.7) biological activity of the described compounds were predicted using Pass Online. The software Origin (OriginLab, USA) was used for the graphical representation of the results.Results and discussion. Mangiferin and its natural homologs are the most hydrophilic compounds. The hydrolysis of the C-glycosidic bond, alkylation, acylation, and the introduction of an amino substituent radical into the mangiferin structure led to the increase of its lipophilic properties. The spectrum of the most probable biological activities of the described molecules: antitumor, antioxidant, and cardioprotective effects. The results of ADMET modeling based on the substance-drug similarity criteria showed that only 4 compounds correspond to the rule of five. We proposed the validation model to predict bioactivity from lipophilicity and molecule structure described with Balaban index. The error of prediction obtained in a result of cross-validation turned out to be about less than 3 %.Conclusion. A correlation between the structure and properties of the molecules discussed has been demonstrated. The obtained results can be used for further prediction of the properties of natural and synthetic xanthone C-glycosides and directed synthesis of new active compounds.

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