Topic
Isovitexin
About: Isovitexin is a research topic. Over the lifetime, 526 publications have been published within this topic receiving 11525 citations. The topic is also known as: 6-Glucosylapigenin & Isovitexin.
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TL;DR: It was shown by varying the light intensity that a relative high concentration of isovitexin is necessary for the droplet like structures to appear and hypothesized that isovitesin interferes with the energy supply of the cells, which therefore are not able to maintain their turgor.
Abstract: UV-microscopic and chromatographic studies have been performed on the variation in contents and configuration of the flavones present in epidermal cells of the petals, stem leaves, rosette leaves and cotyledons ofSilene pratensis plants. Most of the flavone contents is located in the vacuole of the upper epidermis cells, the concentration depending on the light intensity at which the plants were grown. In plants able to glycosylate isovitexin in the petals (genotypegG/. gl/gl fg/fg, accumulating isovitexin 7-O-glucoside) the vacuole is completely filled with the UV absorbing flavone. In plants which are unable to glycosylate isovitexin in their petals (genotypeg/g gl/gl fg/fg, accumulating only isovitexin) the upper epidermal cells of stem leaves and petals contain droplet like structures in their vacuoles. At high light intensities these structures increase in mass and become detectable in the visible light. These denser structures often condense to structures with radiating threads.
9 citations
TL;DR: In this article, the anti-oxidant activity of avicularin and isovitexin from Lespedeza cuneata using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and hydroxyl (OH) scavenging assays was evaluated.
Abstract: This study evaluated the anti-oxidant activity of avicularin and isovitexin from Lespedeza cuneata using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and hydroxyl (OH) scavenging assays. The results showed that among the four fractions, the highest OH radical scavenging activity was exhibited by the n-butanol fraction. The DPPH radical scavenging activities of avicularin and isovitexin were higher than 50% at a concentration of 100 μg/mL. Moreover, one hundred micrograms per liter of avicularin and isovitexin exhibited effective anti-oxidant activity, with the OH radical scavenging rates being 87.54 and 91.48%, respectively. These results suggest that Lespedeza cuneata would be useful anti-oxidant agents from natural sources.
9 citations
TL;DR: The first report of secondary metabolites from the genus Sarcotheca was made by Hallier et al. as mentioned in this paper, who used 1D, 2D NMR, and MS data to identify five new flavone C-glycosides, including chrysin 6-C-(2″-O-α- l -rhamnopyranosyl)-β- d -glucopyrano-glucophyranoside.
9 citations
01 Jan 2010
TL;DR: In this paper, nine flavonoid glycosides were isolated from the aerial parts of Pothos chinensis and identified as vitexin, viteXin 7-O-diglucoside, isoschaftoside and chrysoeriol 7 O-rhamnosylglucosides.
Abstract: Abastract Nine flavonoid glycosides were isolated from the aerial parts of Pothos chinensis. Of their flavonoids, eight ones were identified as vitexin, vitexin 7-O-glucoside, isovitexin 7-O-glucoside, scoparin 7-O-glucoside, isoscoparin 7-O-glucoside, schaftoside, isoschaftoside and chrysoeriol 7-O-rhamnosylglucoside. Another flavonoid was characterized as vitexin 7-O-diglucoside or vitexin 7,X� -di-O-glucoside. The flavonoids of P. chinensis were reported in this paper for the first time.
9 citations
TL;DR: The chemical profile of S. tootsik leaves was uncovered for the first time and it exhibited pancreatic lipase inhibitory activity and may have potential for use as a food supplement for controlling obesity.
Abstract: Background Sinobambusa tootsik (Sieb.) Makino (S. tootsik) is one species of bamboo distributed in China, Japan and Vietnam. The chemical profile of its leaves and its potential application was unknown yet. Methods The chemical profile of S. tootsik was studied by HPLC and UPLC-DAD-QTOF-MS. The S. tootsik extract was prepared by extraction with 50% aqueous ethanol, followed by H103 macroporous resins adsorption and desorption processes. Pancreatic lipase inhibitory activity was determined using p-nitrophenyl palmitate as the substance, which was hydrolyzed by lipase to form coloured p-nitrophenol. Results Eighteen compounds were identified in S. tootsik. Most of them were the C-glycosylated derivatives of luteolin and apigenin, such as isoorientin, isoorientin-2″-O-rhamnoside and isovitexin. Isoorientin-2″-O-rhamnoside was the most dominant flavonoid in the sample. S. tootsik extract was prepared through resin adsorption/desorption with yield of 1.12 ± 015% and total flavonoids content of 82 ± 2 mg/g (in term of isoorientin). The extract exhibited pancreatic lipase inhibitory activity with IC50 value of 0.93 mg/mL. Conclusion The chemical profile of S. tootsik leaves was uncovered for the first time. C-glycosyl flavonoids were the main constituents in the plant. The extract exhibited pancreatic lipase inhibitory activity and may have potential for use as a food supplement for controlling obesity.
9 citations