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Quercetin glycoside

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https://www.readbyqxmd.com/read/29757247/enrichment-and-purification-of-total-ginkgo-flavonoid-o-glycosides-from-ginkgo-biloba-extract-with-macroporous-resin-and-evaluation-of-anti-inflammation-activities-in-vitro
#1
Lihu Zhang, Tingting Wu, Wei Xiao, Zhenzhong Wang, Gang Ding, Linguo Zhao
In the present study, the performance and separation characteristics of six macroporous resins for the enrichment and purification of total ginkgo flavonoid O -glycosides (TGFs) (quercetin (I), kaempferol (II), isorhamnetin (III)) from Ginkgo Biloba extracts (EGB) are evaluated. The adsorption and desorption properties of TGFs are studied on macroporous resins, including D101, D201, AB-8, HPD400, D301, and D311. Along with the results, AB-8 resin exhibits the best adsorption and desorption capacity for these three ginkgo flavonoid O -glycosides among the six resins...
May 13, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29698774/biofilm-inhibition-mechanism-from-extract-of-hymenocallis-littoralis-leaves
#2
Naiem H Nadaf, Rishikesh S Parulekar, Rahul S Patil, Trupti K Gade, Anjum A Momin, Shailesh R Waghmare, Maruti J Dhanavade, Akalpita U Arvindekar, Kailas D Sonawane
ETHNOPHARMACOLOGICAL RELEVANCE: Hymenocallis littoralis (Jacq.) Salisb. has been referred as beach spider lily and commonly known for its rich phytochemical diversity. Phytochemicals such as alkaloids, volatile constituents, phenols, flavonoids, flavonols extracted from different parts of these plants like bulbs, flowers, leaf, stem and root had been used in folk medicines from ancient times because of their excellent antimicrobial and antioxidant properties. The leaf and bulb extract of H...
April 23, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29695040/gastroprotective-and-antioxidant-activity-of-kalanchoe-brasiliensis-and-kalanchoe-pinnata-leaf-juices-against-indomethacin-and-ethanol-induced-gastric-lesions-in-rats
#3
Edilane Rodrigues Dantas de Araújo, Gerlane Coelho Bernardo Guerra, Daline Fernandes de Souza Araújo, Aurigena Antunes de Araújo, Júlia Morais Fernandes, Raimundo Fernandes de Araújo Júnior, Valéria Costa da Silva, Thaís Gomes de Carvalho, Leandro de Santis Ferreira, Silvana Maria Zucolotto
Kalanchoe brasiliensis and Kalanchoe pinnata are used interchangeably in traditional medicine for treating peptic ulcers and inflammatory problems. In this context, this study aims to characterize the chemical constituents and evaluate the gastroprotective activity of the leaf juices of the two species in acute gastric lesions models. Thin Layer Chromatography (TLC) and Ultra High Performance Liquid Chromatography coupled to Mass Spectrometer (UHPLC-MS) were performed for chemical characterization. Wistar rats were pre-treated orally with leaf juices (125, 250 and 500 mg/kg) or ranitidine (50 mg/kg)...
April 24, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29681057/camptotheca-acuminata-10-hydroxycamptothecin-o-methyltransferase-an-alkaloid-biosynthetic-enzyme-coopted-from-flavonoid-metabolism
#4
Vonny Salim, A Daniel Jones, Dean DellaPenna
The medicinal plant Camptotheca acuminata accumulates camptothecin, 10-hydroxycamptothecin, and 10-methoxycamptothecin as its major bioactive monoterpene indole alkaloids. Here, we describe identification and functional characterization of 10-hydroxycamptothecin O-methyltransferase (Ca10OMT), a member of the Diverse subclade of Class II OMTs. Ca10OMT is highly active toward both its alkaloid substrate and a wide range of flavonoids in vitro and in this way contrasts with other alkaloid OMTs in the subclade that only utilize alkaloid substrates...
April 22, 2018: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29666531/qualitative-and-quantitative-analysis-of-flavonoids-from-12-species-of-korean-mulberry-leaves
#5
Wan-Taek Ju, O-Chul Kwon, Hyun-Bok Kim, Gyoo-Byung Sung, Heon-Woong Kim, Yong-Soon Kim
The total flavonoids in leaves of 12 varieties of Korean mulberry ( Morus alba L.) were determined. Seventeen flavonoids were isolated and analyzed using ultra-performance liquid chromatography coupled with diode array detection and quadrupole time-of-flight mass spectrometry (UPLC-DAD-QTOF/MS). To determine the flavonoid contents, HPLC analysis was performed on these 17 flavonoids. The total flavonoid contents of the 12 varieties of mulberry leaves ranged from 748.5 to 1297.9 mg, with the highest obtained from the Cheong Su variety (1297...
May 2018: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/29665363/isoquercetin-ameliorates-hyperglycemia-and-regulates-key-enzymes-of-glucose-metabolism-via-insulin-signaling-pathway-in-streptozotocin-induced-diabetic-rats
#6
Muthukumaran Jayachandran, Tongze Zhang, Kumar Ganesan, Baojun Xu, Stephen Sum Man Chung
Among the foremost common flavonoids within the human diet, quercetin glycosides possess neuroprotective, cardioprotective, anti-oxidative, chemopreventive, and anti-allergic properties. Isoquercetin is one such promising candidate with anti-diabetic potential. However, complete studies of its molecular action on insulin signaling pathway and carbohydrate metabolizing enzymes remain unclear. Hence, we have designed this study to accumulate the experimental evidence in support of anti-diabetic effects of isoquercetin...
April 14, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29663839/a-new-flavonol-glycoside-and-other-flavonoids-from-the-aerial-parts-of-taverniera-aegyptiaca
#7
Ahmed R Hassan, Khadiga F Amer, Sayed A El-Toumy, John Nielsen, Søren Brøgger Christensen
Isolation of flavonoids from the aerial parts of Taverniera aegyptiaca Bioss. (Fabaceae) led to identification of one new flavonol glycoside, isorhamnetin-3-O-α-l-rhamnopyranosyl-(1→2)-α-l-arabinopyranoside (1), along with eleven compounds, which previously have not been isolated from this plant quercetin-3-O-α-l-rhamnopyranosyl-(1→2)-[α-l-rhamnopyranosyl-(1→6)-β-d-galactopyranoside] (2), isorhamnetin-3-O-α-l-arabinopyranoside (3), quercetin-3-O-α-l-rhamnopyranosyl-(1→6)-β-d-glucopyranoside (4), isorhamnetin-3-O-α-l-rhamnopyranosyl-(1→6)-β-d-glucopyranoside (7), isorhamnetin 3-O-α-l-rhamnopyranosyl-(1→2)-[α-l-rhamnopyranosyl-(1→6)-β-d-galactopyranoside] (8), isorhamnetin 3-O-α-l-rhamnopyranosyl-(1→2)-[α-l-rhamnopyranosyl-(1→6)-β-d-glucopyranoside] (9), kaempferol 3-O-α-l-rhamnopyranosyl-(1→2)-[α-l-rhamnopyranosyl-(1→6)-β-d-galactopyranoside] (10), isorhamnetin (11), 4,4'-dihydroxy-2'-methoxychalcone (12), formononetin (13) and calycosin (15)] and some compounds already known from this plant [quercetin-3-O-robinobioside (5), isorhamnetin-3-O-robinobioside (6), afrormosin (14) and odoratin (16)]...
April 17, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29659750/simultaneous-qualitative-and-quantitative-study-of-main-compounds-in-commelina-communis-linn-by-uhplc-q-tof-ms-ms-and-hplc-esi-ms-ms
#8
Xia Zhang, Caijuan Liang, Changlin Li, Mingde Bu, Liying Bu, Yuande Xiao, Hongguang Sun, Lantong Zhang
This study reported the identification and determination of the main components of Commelina communis Linn. A total of 62 compounds were identified in C. communis Linn. extract, which included 29 flavonoids and flavonoid glycosides, 17 phenolic acids, 4 alkaloids, 1 pyrimidine alkaloids, 3 sterols and 8 fatty acids and others by ultra high performance liquid chromatography coupled with hybrid triple quadrupole time-of-flight mass spectrometry. Moreover, a specific, simple, rapid and sensitive high performance liquid chromatography with tandem mass spectrometry method was developed and validated for determination of 13 components of C...
April 11, 2018: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/29655752/systematic-evaluation-of-phenolic-compounds-and-protective-capacity-of-a-new-mulberry-cultivar-j33-against-palmitic-acid-induced-lipotoxicity-using-a-simulated-digestion-method
#9
Dongwen Hu, Yang Xu, Jiahong Xie, Chongde Sun, Xiaodong Zheng, Wei Chen
This research aimed to investigate the protective effects of a new mulberry cultivar J33 with simulated gastrointestinal digestion against palmitic acid (PA)-induced lipotoxicity. LC-MS analysis revealed that the contents of four flavonoid glycosides (quercetin rhamnosylhexoside hexoside, quercetin rhamnosylhexoside, quercetin hexoside, kaempferol rhamnosylhexoside) increased after digestion. Besides, mulberry digest (MBD) at 0.5-2 mg/mL significantly reduced PA-induced lipotoxicity in human hepatocytes, while mulberry extract without digestion (MBE) showed no protection...
August 30, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29655718/quantitative-analyses-of-the-bitterness-and-astringency-of-catechins-from-green-tea
#10
Yong-Quan Xu, Ying-Na Zhang, Jian-Xin Chen, Fang Wang, Qi-Zhen Du, Jun-Feng Yin
Bitterness and astringency are two important quality attributes of green tea infusion, and catechins are the main contributor to the bitterness and astringency. The aim of this work was to quantitatively analyse the bitterness and astringency of green tea infusion according to the concentrations of catechins. The concentration-taste curves of catechins showed a pattern that fit the cubic functions, and their R2 values were higher than 0.956. The bitterness of green tea was highly correlated with the concentrations of (-)-epigallocatechin gallate and (-)-epicatechin gallate (ECG) (R2  = 0...
August 30, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29620448/analysis-of-flavonoid-glycosides-with-potential-medicinal-properties-on-bauhinia-uruguayensis-and-bauhinia-forficata-subspecies-pruinosa
#11
Marina Santos, Renée H Fortunato, Viviana G Spotorno
Several Bauhinia species are widely used in Southern South America in the treatment of infections, pain and several diseases including diabetes. Flavonoid compounds based on quercetin and kaempferol glycoside derivatives are believed to be responsible for their therapeutic properties. To investigate this, we have studied two native species from Argentina: B. uruguayensis (BU) and B. forficata subsp. pruinosa (BF). We have analyzed the major polyphenol components in hydro-methanolic extracts of leaves, by high performance liquid chromatography tandem mass spectrometry...
April 5, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29589631/broad-bean-vicia-faba-l-pods-a-rich-source-of-bioactive-ingredients-with-antimicrobial-antioxidant-enzyme-inhibitory-anti-diabetic-and-health-promoting-properties
#12
Faiza Mejri, Slimen Selmi, Alice Martins, Haifa Benkhoud, Tarek Baati, Hedia Chaabane, Leila Njim, Maria L M Serralheiro, Amélia P Rauter, Karim Hosni
This study was aimed at investigating the chemical composition (proximate, minerals, fatty acids and phenolic compounds) and the in vitro (antimicrobial, radical scavenging, anti-acetylcholinesterase and protein denaturing activities) and in vivo (anti-diabetic and histo-protective effects in alloxan-induced diabetic mice) biological activities of broad bean pods (BBPs), a food waste by-product material. The results showed that BBPs have high dietary fiber (57.46%), carbohydrate (18.93%) and protein (13.81%) content versus low fat content (<1%) contributing to a low energy value of 139...
March 28, 2018: Food & Function
https://www.readbyqxmd.com/read/29574052/lymphatic-metabolites-of-quercetin-after-intestinal-administration-of-quercetin-3-glucoside-and-its-aglycone-in-rats
#13
Toshiyuki Nakamura, Chinatsu Kinjo, Yoshimasa Nakamura, Yoji Kato, Miyu Nishikawa, Masahiro Hamada, Noriyuki Nakajima, Shinichi Ikushiro, Kaeko Murota
Quercetin is a major flavonoid, present as its glycosidic forms in plant foods. In this study, quercetin-3-glucoside (Q3G) was administered intraduodenally to thoracic lymph-cannulated rats, and its lymphatic transport was investigated. The resulting lymphatic and plasma metabolites were identified with LC-MS/MS and compared with those after administration of quercetin aglycone. The total concentration of quercetin metabolites in the lymph was about four times lower than that in the plasma, and quercetin and its methylated form isorhamnetin were detected as their glucuronides, sulfates and diglucuronides both in the lymph and the plasma after Q3G and quercetin administrations...
March 21, 2018: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29565317/new-findings-in-prunus-padus-l-fruits-as-a-source-of-natural-compounds-characterization-of-metabolite-profiles-and-preliminary-evaluation-of-antioxidant-activity
#14
Dario Donno, Maria Gabriella Mellano, Marta De Biaggi, Isidoro Riondato, Ernest Naivonirina Rakotoniaina, Gabriele Loris Beccaro
European bird cherry ( Prunus padus L.) has been known since the Middle Ages for its medical/food use and high health-promoting value. This study aimed to assess the potential of these fruits as a source of bioactive compounds through the characterization of its physicochemical traits, nutraceutical properties, phytochemical composition via HPLC fingerprint, and antioxidant capacity. Fully ripened fruits of Prunus padus L. (Colorata cv) were collected in mid-July 2017 in Chieri, north-western Italy. The TPC (194...
March 22, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29552820/-constituents-isolated-from-n-butanol-extract-of-leaves-of-moringa-oleifera
#15
Feng-Hua Li, Hong-Qing Wang, Xian-Ming Su, Chang-Kang Li, Bao-Ming Li, Ruo-Yun Chen, Jie Kang
Seventeen compounds were isolated from n-butanol extract of the leaves of Moringa oleifera, using column chromatography over macroporous resin HP-20,Sephadex LH-20, and ODS. Their structures were identified as two carboline,tangutorid E(1) and tangutorid F(2); three phenolic glycosides,niazirin(3),benzaldehyde 4-O-α-L-rhamnopyranoside(4) and 4-O-β-D-glucopyranosidebenzoic acid(5); four chlorogenic acid and derivatives,4-caffeoylquinic acid(6),methyl 4-caffeoylquinate(7),caffeoylquinic acid(8) and methyl caffeoylquinate(9); two nucleosids,uridine(10) and adenosine(11); one flavone,quercetin 3-O-β-D-glucopyranoside(12); five other types of compounds,phthalimidineacetic acid(13),3-pyridinecarboxamide(14),3,4-dihydroxy-benzoic acid(15),5-hydroxymethyl-2-furancarboxylic acid(16) and 5-hydroxymethyl-2-furaldehyde(17) by the spectral data of ¹H, ¹³C-NMR and MS...
January 2018: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29548473/postharvest-changes-in-the-phenolic-profile-of-watercress-induced-by-post-packaging-irradiation-and-modified-atmosphere-packaging
#16
José Pinela, Lillian Barros, João C M Barreira, Ana Maria Carvalho, M Beatriz P P Oliveira, Celestino Santos-Buelga, Isabel C F R Ferreira
The effects of γ-ray irradiation and modified atmosphere packaging (MAP) on watercress (Nasturtium officinale R. Br.) phenolic compounds were evaluated after 7-day storage at 4 °C. Irradiation doses of 1, 2 and 5 kGy were tested, as well as vacuum-packaging and MAP enriched with 100% N2 and Ar. A non-irradiated, air-packaged control was included in all experiments. p-Coumaric acid was the most abundant compound in fresh watercress, followed by quercetin-3-O-sophoroside and isorhamnetin-O-hydroxyferuloylhexoside-O-hexoside...
July 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29548293/taraxacum-officinale-and-urtica-dioica-extracts-inhibit-dengue-virus-serotype-2-replication-in-vitro
#17
María R Flores-Ocelotl, Nora H Rosas-Murrieta, Diego A Moreno, Verónica Vallejo-Ruiz, Julio Reyes-Leyva, Fabiola Domínguez, Gerardo Santos-López
BACKGROUND: Urtica dioica, Taraxacum officinale, Calea integrifolia and Caesalpinia pulcherrima are widely used all over the world for treatment of different illnesses. In Mexico, these plants are traditionally used to alleviate or counteract rheumatism and inflammatory muscle diseases. In the present study we evaluated the activity of aqueous and methanolic extracts of these four plants, on the replication of dengue virus serotype 2 (DENV2). METHODS: Extraction process was carried out in a Soxtherm® system at 60, 85 and 120 °C; a chemical fractionation in silica gel chromatography was performed and compounds present in the active fractions were identified by HPLC-DAD-ESI/MSn...
March 16, 2018: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29537689/comparison-of-polyphenol-profile-and-antimutagenic-and-antioxidant-activities-in-two-species-used-as-source-of-solidaginis-herba-goldenrod
#18
Dorota Woźniak, Sylwester Ślusarczyk, Krzysztof Domaradzki, Andrzej Dryś, Adam Matkowski
European Pharmacopoeia accepts two equivalent species Solidago canadensis L. and S. gigantea Ait. as Goldenrod (Solidaginis herba). We compared phytochemical profile of both species from invasive populations in Poland. Further, we compared in vitro antimutagenic and antioxidant activities of solvent extracts from aerial (AP) and underground parts (UP). In S. gigantea, flavonoid profile was dominated by quercetin glycosides, with quercitrin as the major compound. In S. canadensis, quercetin and kaempferol rutinosides were two major constituents...
March 14, 2018: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29527979/phenolic-compounds-from-the-aerial-parts-of-clematis-viticella-l-and-their-in-vitro-anti-inflammatory-activities
#19
Hasan Kırmızıbekmez, Yiğit İnan, Rengin Reis, Hande Sipahi, Ahmet C Gören, Erdem Yeşilada
Phytochemical investigations on the EtOH extract of Clematis viticella led to the isolation of six flavonoid glycosides, isoorientin (1), isoorientin 3'-O-methyl ether (2), quercetin 7-O-α-L-rhamnopyranoside (3), quercetin 3,7-di-O-α-L-rhamnopyranoside (4), manghaslin (5) and chrysoeriol 7-O-β-D-glucopyranoside (6), one phenylethanol derivative, hydroxytyrosol (7), along with three phenolic acids, caffeic acid (8), (E)-p-coumaric acid (9) and p-hydroxybenzoic acid (10). The structures of the isolates were elucidated on the basis of NMR and HR-MS data...
March 12, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29520358/usage-of-ft-icr-ms-metabolomics-for-characterizing-the-chemical-signatures-of-barrel-aged-whisky
#20
Chloé Roullier-Gall, Julie Signoret, Daniel Hemmler, Michael A Witting, Basem Kanawati, Bernhard Schäfer, Régis D Gougeon, Philippe Schmitt-Kopplin
Whisky can be described as a complex matrix integrating the chemical history from the fermented cereals, the wooden barrels, the specific distillery processes, aging, and environmental factors. In this study, using Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) and liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS), we analyzed 150 whisky samples from 49 different distilleries, 7 countries, and ranging from 1 day new make spirit to 43 years of maturation with different types of barrel...
2018: Frontiers in Chemistry
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