A validated method for coumarin quantification in Meliloti herba and its ethanolic extracts using micellar thin-layer chromatography
Published on: 12th October, 2021
OCLC Number/Unique Identifier: 9305454757
A micellar thin-layer chromatography method for the quantitative determination and validation of coumarin in Meliloti herba and its ethanolic extracts was developed and validated. For achieving good determination, the mobile phase of 5 x 10-4 mol/L Tween-80 in a mixture propanol-2 – water (5:95 v/v) was used. Densitometric determination was carried out at 275 nm. The calibration curve was linear in the range of 0.1-2.5 μg per band. The proposed method is simple, rapid, precise and accurate; replacing hazardous solvents by greener ones correspond to the modern requirements in “Green chemistry” concepts. The obtained data can be used for the routine analysis of coumarin in medical plant and extracts.
In silico disrupting quorum sensing of porphyromonas gingivalis via essential oils and coumarin derivatives
Published on: 20th July, 2022
The emergence of Porphyromonas gingivalis biofilm is a hallmark of risky burden diseases including Alzheimer's disease and atherosclerosis. The current study aims to screen some natural essential oil compounds and coumarin derivatives to interfere with quorum sensing of the bacterium and thus biofilm formation. A total of 20 ligands (10 essential oil molecules and 10 coumarin derivatives) were docked to P.gingivalis heme-binding protein HmuY using UCSF Chimera built-in AutoDock interface. Alongside, ADMET properties were also predicted via ADMETsar 2.0 and ProTox-II webservers. All of the selected ligands had higher free energy values than the reference inhibitor MES and native coumarin as well. Moreover, ADME parameters are in good agreement with Lipinski's rule of five. Nevertheless, the best molecules with top binding energy exhibited slight immunogenicity as well as carcinogenicity issues requiring in vitro confirmation. In conclusion, the tested ligands had better efficacy against P.gingivalis quorum sensing and biofilm.
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