rhamnetin and tamarixetin
rhamnetin has been researched along with tamarixetin* in 2 studies
Other Studies
2 other study(ies) available for rhamnetin and tamarixetin
Article | Year |
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Flavonoids as BACE1 inhibitors: QSAR modelling, screening and in vitro evaluation.
Alzheimer's disease (AD) is marked by the presence of amyloid plaques, neurofibrillary tangles, oxidatively damaged neuronal macromolecules and redox sensitive ions. Reduction of amyloid plaques and oxidative stress emerge as a convincing treatment strategy. Plaque reduction is achieved by inhibition of BACE1, the rate limiting enzyme generating the prime constituent of plaques, Aβ, through proteolysis of the amyloid precursor protein. Here, we report a QSAR model with five descriptors, developed to screen natural compounds as potent BACE1 inhibitors. Seven compounds out of which five flavonols namely isorhamnetin, syringetin, galangin, tamarixetin, rhamnetin and two flavanonols namely dihydromyricetin, taxifolin were screened. The ability of these compounds were validated using the BACE1 activity assay. The antioxidant property were estimated by the DPPH and ABTS assay. Although inhibition assay implied syringetin to be a promising BACE1 inhibitor, its poor antioxidant activity leaves it less effective as a multitarget ligand. Exhibiting moderate dual ability, isorhamnetin and taxifolin qualified as multi-target scaffolds for AD therapeutics. Our study reveals the importance of 4'-OH in the B ring of flavonols and the lack of any effect of 5'-OH in flavanonols for BACE1 inhibition. In case of antioxidant activity favourable association of 3'-O-methylation derivatives was observed in flavonols. Topics: Alzheimer Disease; Amyloid beta-Peptides; Amyloid Precursor Protein Secretases; Aspartic Acid Endopeptidases; Disaccharides; Flavonoids; Flavonols; Humans; Molecular Docking Simulation; Neurons; Oxidative Stress; Plaque, Amyloid; Protein Conformation; Quantitative Structure-Activity Relationship; Quercetin | 2020 |
[Studies on flavonoids of Eupatorium odoratum L].
To investigate the flavonoid constituents from aerial parts of Eupatorium odoratum L. systematically.. The constituents of the EtoAc-soluble portions of the 95% ethanol extraction were isolated and purified by silica gel and sephadex LH-20 chromatography. Their structures were elucidated on the basis of physicochemical properties and spectral analysis.. Eight compounds were isolated and identified as kaempferol-3-methoxy (I), rhamnetin (II), tamarixetin (III), quercetin (IV), kaempferol (V), apigenin (VI), luteolin (VII), dihydrokaempferide (VIII).. Compound I , II and VI were isolated for the first time from genus Eupatorium, and VIII which is rare flavonoid was obtainted for the first time from family Compositae. Topics: Apigenin; Chromatography, Gel; Chromatography, Ion Exchange; Chromolaena; Dextrans; Disaccharides; Flavonoids; Kaempferols; Molecular Structure; Plant Components, Aerial; Plants, Medicinal; Quercetin; Silicon Dioxide | 2007 |