3-methylquercetin has been researched along with procyanidin* in 2 studies
2 other study(ies) available for 3-methylquercetin and procyanidin
Article | Year |
---|---|
Bioactive Components and Antioxidant Capacity of Fruits from Nine Sorbus Genotypes.
In this study, biochemical profile of fruits of 9 Sorbus genotypes was analyzed. The content of total sugars ranged from 69.7 g/kg ('Titan') to 217.5 g/kg (Sorbus torminalis) and total organic acids from 17.7 g/kg ('Businka') to 40.2 g/kg (S. torminalis). The highest content of total anthocyanins had 'Burka' (871 mg/kg FW) and 'Businka' (856 mg/kg FW). Quercetin derivatives represented more than 95% of total flavonols. 'Alaja krupnaja' had 3.5- to 29-fold higher rutin content than other analyzed genotypes. S. torminalis fruits had the greatest diversity of isorhamnetin and kaempferol derivatives. Chlorogenic acid was the major hydroxycinnamic acid and its share was 33% to 73% of total analyzed hydoxycinnamic acid derivatives. The richest in chlorogenic acid were 'Krasavica' and 'Alaja krupnaja' fruits. Cultivar 'Businka' had the highest content of epicatechin (40.7 mg/kg) and neochlorogenic acid (1061 mg/kg). Different procyanidin oligomers were detected among flavanols in Sorbus fruits. The highest content of total flavanols was measured in 'Alaja Krupnaja' fruits. Cultivars 'Krasavica' (84.5 mg/kg) and 'Burka' (85.1 mg/kg) had 1.2- to 6.9-fold higher amount of total carotenoids. 'Businka' was highlighted as the richest in total tannin and phenolic contents (3768 mg GAE/kg) and consequently, it had the highest antioxidant activity (57.6 mM TE/kg FW). Being abundant in polyphenolics, some extracts of Sorbus genotypes, for example, 'Businka,' 'Burka,' and 'Alaja krupnaja' could serve as valuable resource of bioactive compounds to food and pharmaceutical industries. Topics: Anthocyanins; Antioxidants; Biflavonoids; Carotenoids; Catechin; Chlorogenic Acid; Flavonols; Fruit; Genotype; Kaempferols; Phenols; Plant Extracts; Polyphenols; Proanthocyanidins; Quercetin; Quinic Acid; Sorbus | 2017 |
Mono-O-methylated flavanols and other flavonoids as inhibitors of endothelial NADPH oxidase.
The dietary flavan-3-ol (-)-epicatechin improves the bioactivity of nitric oxide in arterial vessels in vivo. Moreover, it effectively protects cultured vascular endothelial cells from signs of oxidative stress and elevates intracellular nitric oxide in vitro. We addressed the effects of (-)-epicatechin, its metabolic conversion products and structurally related compounds on NADPH oxidase activity in intact human umbilical vein endothelial cells (HUVEC) and in cell lysates. (-)-Epicatechin proved to be an O2*(-)-scavenger but did not inhibit NADPH oxidase activity, whereas the converse pattern was observed for the metabolites 3'- and 4'-O-methyl epicatechin. The dimer procyanidin B2 and (-)-epicatechin glucuronide were O2*(-)-scavengers and inhibited NADPH oxidase. Analysis of structure-activity relations with 45 compounds suggests an apocynin-like mode of NADPH oxidase inhibition. Notably, HUVEC converted (-)-epicatechin to NADPH oxidase-inhibitory methyl ethers. These data identify endothelial NADPH oxidase as candidate target of dietary flavonoids and particularly of their metabolites. Topics: Biflavonoids; Catechin; Cells, Cultured; Drug Design; Endothelium; Endothelium, Vascular; Enzyme Inhibitors; Flavones; Flavonoids; Flavonols; Humans; Microsomes, Liver; NADPH Oxidases; Proanthocyanidins; Quercetin; Structure-Activity Relationship; Umbilical Veins | 2008 |