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Pagina 1 a partire dal 31 risultati
Biflavones of Ginkgo biloba stimulate lipolysis in 3T3-L1 adipocytes.
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Ginkgo biloba L. biflavones were shown to increase cAMP phosphodiesterase activity and to stimulate skin microcirculation. The aim of this study was to investigate whether biflavones were able to stimulate lipolysis in adipocytes. Lipolysis was assayed in fully differentiated 3T3-L1 fat cells in the
Inhibition of rat adjuvant-induced arthritis by ginkgetin, a biflavone from ginkgo biloba leaves.
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Ginkgetin, a biflavone isolated from Ginkgo biloba leaves, was previously reported as an inhibitor of group II phospholipase A2. In this study, ginkgetin was evaluated for in vivo antiarthritic and analgesic activities. Ginkgetin (10-20 mg/kg/day) strongly reduced arthritic inflammation in an animal
Antifungal activity of biflavones from Taxus baccata and Ginkgo biloba.
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Bilobetin and 4'''-O-methylamentoflavone were isolated and identified in the needles of Taxus baccata, for the first time in this species. The antifungal activity of biflavones from T. baccata and Ginkgo biloba, namely amentoflavone, 7-O-methylamentoflavone, bilobetin, ginkgetin, sciadopitysin and
Effect of biflavones of Ginkgo biloba against UVB-induced cytotoxicity in vitro.
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The effect of Ginkgo biloba extract on Ultraviolet B (UVB) irradiated fibroblasts was examined by using a neutral red dye uptake assay and a lactic dehydrogenase (LDH) release assay. Crude extract along with individual components, including flavone-glycosides and biflavones, were applied to cultured
Biflavone glucosides from Ginkgo biloba yellow leaves.
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Phytochemical investigation of Ginkgo biloba (Ginkgoaceae) has resulted in the isolation of two new biflavone glucosides, ginkgetin 7''-O-beta-D-glucopyranoside (1) and isoginkgetin 7-O-beta-D-glucopyranoside (2). The structures were determined on the basis of chemical and spectroscopic evidences.
Inhibition of cGMP-phosphodiesterase-5 by biflavones of Ginkgo biloba.
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Ginkgo biloba dimeric flavonoids (GBDF) were shown to inhibit cAMP phosphodiesterase activity and to promote vasorelaxation. In particular, amentoflavone exhibited endothelium-dependent relaxation of rat aorta rings via enhanced generation and/or increased biological activity of nitric oxide,
Inhibition of cAMP-phosphodiesterase by biflavones of Ginkgo biloba in rat adipose tissue.
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This work compares the inhibition of cAMP-phosphodiesterase in rat adipose tissue by a mixture of Ginkgo biloba biflavones with the effect of individual dimeric flavonoids. The degree of enzyme inhibition by G. biloba biflavones was amentoflavone > bilobetin > sequoiaflavone > ginkgetin =
HPLC Separation and Quantitative Determination of Biflavones in Leaves from Ginkgo biloba.
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An HPLC method for separation and quantitative determination of biflavones in crude leaf extracts from GINKGO BILOBA L. is described. A system using a Lichrosorb(R)-Diol column and the ternary elution system: hexane-chloroform-tetrahydrofuran, was suitable for separation of sciadopitysin, ginkgetin,
Biflavones from Ginkgo biloba as inhibitors of human thrombin.
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Ginkgo Biloba leaf extract has been widely used for the prevention and treatment of thrombosis and cardiovascular disease in both eastern and western countries, but the bioactive constituents and the underlying mechanism of anti-thrombosis have not been fully characterized. The purpose of this study
Ginkgetin, a biflavone from Ginkgo biloba leaves, prevents adipogenesis through STAT5-mediated PPARγ and C/EBPα regulation.
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Adipogenesis involved in hypertrophy and hyperplasia of adipocytes is responsible for expanding the mass of adipose tissues in obese individuals. Peroxisome proliferator-activated receptor γ (PPARγ) and CCAAT/enhancer-binding protein α (C/EBPα) are two principal transcription factors induced by
Biflavones from Ginkgo biloba as novel pancreatic lipase inhibitors: Inhibition potentials and mechanism.
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Reduction of lipid absorption has been recognized as an attractive approach for the discovery of new drugs to treat obesity and overweight. The leave extract of Ginkgo biloba has been widely used for the treatment of metabolic diseases (such as hyperlipidemia) in both eastern and western countries,
Simultaneous quantification of flavonol glycosides, terpene lactones, biflavones, proanthocyanidins, and ginkgolic acids in Ginkgo biloba leaves from fruit cultivars by ultrahigh-performance liquid chromatography coupled with triple quadrupole mass spectrometry.
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On the basis of liquid chromatography coupled with triple quadrupole mass spectrometry working in multiple reaction monitoring mode, an analytical method has been established to simultaneously determine flavonol glycosides, terpene lactones, biflavones, proanthocyanidins, and ginkgolic acids in
Comparative antilipoperoxidant, antinecrotic and scavenging properties of terpenes and biflavones from Ginkgo and some flavonoids.
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Ginkgo biloba extract is known to be efficient in diseases associated with free radical generation. This study compares the in vitro effect of some constituents of Ginkgo against lipid peroxidation and cell necrosis of isolated rat hepatocytes, and against superoxide anion which is generally
Inhibition of human cytochromes P450 by components of Ginkgo biloba.
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The extraction, isolation and characterization of 29 natural products contained in Ginkgo biloba have been described, which we have now tested for their in-vitro capacity to inhibit the five major human cytochrome P450 (CYP) isoforms in human liver microsomes. Weak or negligible inhibitory activity
[Study on optimization of drying method and its mechanism in Ginkgo biloba leaves].
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To provide a scientific evidence for the initial primary processing method, an ultra-high performance liquid chromatography combined with a triple quadrupole electrospray tandem mass spectrometry (UPLC-MS/MS) was used to analyze the contents variation of catechins, flavonoids, flavonoid glycosides,
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