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chlorogenic acid

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https://www.readbyqxmd.com/read/28527897/advanced-glycation-endproducts-form-during-ovalbumin-digestion-in-the-presence-of-fructose-inhibition-by-chlorogenic-acid
#1
Yasmin Bains, Alejandro Gugliucci, Russell Caccavello
BACKGROUND: One mechanism by which fructose could exert deleterious effects is through intestinal formation and absorption of pro-inflammatory advanced glycation endproducts via the Maillard reaction. We employed simulated stomach and duodenum digestion of ovalbumin (OVA) to test the hypothesis that advanced glycation endproducts (AGEs) are formed by fructose during simulated digestion of a ubiquitous food protein under model physiological conditions. METHODS: OVA was subjected to simulated gastric and intestinal digestion using standard models, in presence of fructose or glucose (0-100mM)...
May 17, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28521988/enhanced-solubility-and-antioxidant-activity-of-chlorogenic-acid-chitosan-conjugates-due-to-the-conjugation-of-chitosan-with-chlorogenic-acid
#2
Liyun Rui, Minhao Xie, Bing Hu, Li Zhou, Muhammad Saeeduddin, Xiaoxiong Zeng
Chlorogenic acid-chitosan conjugate was synthesized by introducing of chlorogenic acid onto chitosan with the aid of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide and hydroxybenzotriazole. The data of UV-vis, FT-IR and NMR for chlorogenic acid-chitosan conjugates demonstrated the successful conjugation of chlorogenic acid with chitosan. Compared to chitosan, chlorogenic acid-chitosan conjugates exhibited increased solubility in distilled water, 1% acetic acid solution (v/v) or 50% ethanol solution (v/v) containing 0...
August 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28514152/hepatoprotective-properties-of-a-polyphenols-enriched-fraction-from-annona-crassiflora-mart-fruit-peel-against-diabetes-induced-oxidative-and-nitrosative-stress
#3
Allisson B Justino, Mariana N Pereira, Leonardo G Peixoto, Danielle D Vilela, Douglas C Caixeta, Adriele V de Souza, Renata R Teixeira, Heitor C G Silva, Francyelle B R de Moura, Izabela B Moraes, Foued Salmen Espindola
A polyphenols-enriched fraction from Annona crassiflora fruit peel (Ac-Pef) containing chlorogenic acid, (epi)catechin, procyanidin B2 and caffeoyl-glucoside was investigated against hepatic oxidative and nitrosative stress in streptozotocin-induced diabetic rats. Serum biochemical parameters, hepatic oxidative and nitrosative status, glutathione defense system analysis, and in silico assessment of absorption, distribution, metabolism, excretion and toxicity (ADMET) of the main compounds of Ac-Pef were carried out...
May 17, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28513780/reduction-of-the-dna-damages-hepatoprotective-effect-and-antioxidant-potential-of-the-coconut-water-ascorbic-and-caffeic-acids-in-oxidative-stress-mediated-by-ethanol
#4
Vanderson S Bispo, Lucas S Dantas, Adriano B Chaves, Isabella F D Pinto, Railmara P DA Silva, Felipe A M Otsuka, Rodrigo B Santos, Aline C Santos, Danielle J Trindade, Humberto R Matos
Hepatic disorders such as steatosis and alcoholic steatohepatitis are common diseases that affect thousands of people around the globe. This study aims to identify the main phenol compounds using a new HPLC-ESI+-MS/MS method, to evaluate some oxidative stress parameters and the hepatoprotective action of green dwarf coconut water, caffeic and ascorbic acids on the liver and serum of rats treated with ethanol. The results showed five polyphenols in the lyophilized coconut water spiked with standards: chlorogenic acid (0...
May 15, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28512595/reassessment-of-the-polar-fraction-of-stachys-alopecuros-l-benth-subsp-divulsa-ten-grande-lamiaceae-from-the-monti-sibillini-national-park-a-potential-source-of-bioactive-compounds
#5
Alessandro Venditti, Claudio Frezza, Lorenzo M Lorenzetti, Filippo Maggi, Mauro Serafini, Armandodoriano Bianco
BACKGROUND: The phytochemical analysis of Stachys alopecuros subsp. divulsa, an endemic Italian species, has been recently reported and has showed the presence of 8-O-acetylharpagide (2), harpagide (3), allobetonicoside (4), and 4¢-O-galactopyranosyl-teuhircoside (5). In this paper, an in deep study of its glycosidic fraction with the aim to widen the knowledge on its secondary metabolites content is reported. MATERIALS AND METHODS: Chromatographic techniques were used for the isolation of constituents while spectroscopic and spectrometric techniques were applied for the structures elucidation...
April 2017: Journal of Intercultural Ethnopharmacology
https://www.readbyqxmd.com/read/28505129/assessment-of-antimicrobial-and-antioxidant-activities-of-nepeta-trachonitica-analysis-of-its-phenolic-compounds-using-hplc-ms-ms
#6
Ekrem Köksal, Hatice Tohma, Ömer Kılıç, Yusuf Alan, Abdülmelik Aras, İlhami Gülçin, Ercan Bursal
Continuing our work on the sources of natural bioactive compounds, we evaluated the antimicrobial and antioxidant activities of Nepeta trachonitica as well as its major phenolic content using the high-performance liquid chromatography-mass spectrometry/mass spectrometry (HPLC-MS/MS) technique. For antioxidant activity, ferric reducing antioxidant power (FRAP) and cupric ion reducing antioxidant capacity (CUPRAC) methods were performed to measure the reducing power and 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay was employed to evaluate the radical scavenging activity of the sample...
May 15, 2017: Scientia Pharmaceutica
https://www.readbyqxmd.com/read/28505074/nafld-and-atherosclerosis-are-prevented-by-a-natural-dietary-supplement-containing-curcumin-silymarin-guggul-chlorogenic-acid-and-inulin-in-mice-fed-a-high-fat-diet
#7
Antonella Amato, Gaetano-Felice Caldara, Domenico Nuzzo, Sara Baldassano, Pasquale Picone, Manfredi Rizzo, Flavia Mulè, Marta Di Carlo
Non-alcoholic fatty liver disease (NAFLD) confers an increased risk of cardiovascular diseases. NAFDL is associated with atherogenic dyslipidemia, inflammation and renin-angiotensin system (RAS) imbalance, which in turn lead to atherosclerotic lesions. In the present study, the impact of a natural dietary supplement (NDS) containing Curcuma longa, silymarin, guggul, chlorogenic acid and inulin on NAFLD and atherosclerosis was evaluated, and the mechanism of action was examined. C57BL/6 mice were fed an HFD for 16 weeks; half of the mice were simultaneously treated with a daily oral administration (os) of the NDS...
May 13, 2017: Nutrients
https://www.readbyqxmd.com/read/28499256/from-common-to-rare-zingiberaceae-plants-a-metabolomics-study-using-gc-ms
#8
Gina B Barbosa, Nirupama S Jayasinghe, Siria H A Natera, Ellen D Inutan, Nonita P Peteros, Ute Roessner
Zingiberaceae plants, commonly known as gingers, have been popular for their medicinal and culinary uses since time immemorial. In spite of their numerous health-promoting applications, many Zingiberaceae plants still receive no scientific attention. Moreover, existing reports mostly focused only on the Zingiberaceae rhizomes. Here, untargeted metabolite profiling using Gas Chromatography - Mass Spectrometry (GC-MS) was used to compare the metabolic composition of leaves and rhizomes of the more common gingers, Zingiber officinale Rosc...
May 9, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28498356/nine-different-chemical-species-and-action-mechanisms-of-pancreatic-lipase-ligands-screened-out-from-forsythia-suspensa-leaves-all-at-one-time
#9
Tinggui Chen, Yayun Li, Liwei Zhang
It is difficult to screen out as many active components as possible from natural plants all at one time. In this study, subfractions of Forsythia suspensa leaves were firstly prepared; then, their inhibitive abilities on pancreatic lipase were tested; finally, the highest inhibiting subfraction was screened by self-made immobilized pancreatic lipase. Results showed that nine ligands, including eight inhibitors and one promotor, were screened out all at one time. They were three flavonoids (rutin, IC50: 149 ± 6...
May 12, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28497036/reversed-phase-hplc-dad-profiling-of-carotenoids-chlorophylls-and-phenolic-compounds-in-adiantum-capillus-veneris-leaves
#10
Alam Zeb, Fareed Ullah
Adiantum capillus-veneris is important endangered fern species with several medicinal properties. In this study, the leaves samples were extracted and separated using reversed phase HPLC with DAD for carotenoids, chlorophylls and phenolic compounds. Separation of carotenoids and chlorophylls were carried out using a tertiary gradient system of water, MTBE and methanol-water, while a binary gradient system of methanol-water-acetic acid was used for phenolic profiling. Results revealed eight carotenoids, four pheophytins, and two chlorophylls...
2017: Frontiers in Chemistry
https://www.readbyqxmd.com/read/28493441/uhplc-esi-ms-ms-determination-and-pharmacokinetics-of-pinoresinol-glucoside-and-chlorogenic-acid-in-rat-plasma-after-oral-administration-of-eucommia-ulmoides-oliv-extract
#11
Xiaojian Gong, Qingxiang Luan, Xin Zhou, Yang Zhao, Chao Zhao
This study aimed to develop a specific UHPLC-ESI-MS/MS method for simultaneous determination and pharmacokinetics of pinoresinol glucoside and chlorogenic acid in rat plasma after oral administration of E. ulmoides. The chromatographic separation was achieved on a Hypersil GOLD column with gradient elution by using a mixture of 0.1% formic acid aqueous solution and acetonitrile as the mobile phase at a flow rate of 200 μL/min. A tandem mass spectrometric detection was conducted using multiple-reaction monitoring (MRM) via an electrospray ionization (ESI) source in negative ionization mode...
May 10, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28490191/proliferative-and-antioxidant-activity-of-symphytum-officinale-root-extract
#12
Ireneusz Sowa, Roman Paduch, Maciej Strzemski, Sylwia Zielińska, Ewelina Rydzik-Strzemska, Jan Sawicki, Ryszard Kocjan, Janusz Polkowski, Adam Matkowski, Michał Latalski, Magdalena Wójciak-Kosior
The root of Symphytum officinale L. is commonly used in folk medicine to promote the wound healing, reduce the inflammation and in the treatment of broken bones. The objective of our investigation was to analyse the extract from S. officinale in term of its antioxidant activity and the effect on cell viability and proliferation of human skin fibroblast (HSF). Moreover, the quantification of main phenolics and allantoin was conducted using HPLC-DAD method. Five compounds were found: rosmarinic, p-hydroxybenzoic, caffeic, chlorogenic and p-coumaric acid...
May 10, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28490088/antioxidant-activities-of-aqueous-extract-from-stevia-rebaudiana-stem-waste-to-inhibit-fish-oil-oxidation-and-identification-of-its-phenolic-compounds
#13
Hui Yu, Gangqiang Yang, Minoru Sato, Toshiyasu Yamaguchi, Toshiki Nakano, Yinci Xi
We investigated the potential for exploiting Stevia rebaudiana stem (SRS) waste as a source of edible plant-based antioxidants finding for the first time that the hot water extract of SRS had significantly higher antioxidant activity against fish oil oxidation than that of the leaf, despite SRS extract having lower total phenolic content, DPPH radical scavenging activity and ORAC values. To locate the major antioxidant ingredients, SRS extract was fractionated using liquid chromatography. Five phenolic compounds (primary antioxidant components in activity-containing fractions) were identified by NMR and HR-ESI-MS: vanillic acid 4-O-β-d-glucopyranoside (1), protocatechuic acid (2), caffeic acid (3), chlorogenic acid (4) and cryptochlorogenic acid (5)...
October 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28489956/the-role-of-chlorogenic-acid-supplementation-in-anemia-and-mineral-disturbances-induced-by-4-tert-octylphenol-toxicity
#14
Khaled M M Koriem, Mahmoud S S Arbid, Nawal E Gomaa
4-tert-octylphenol (OP) is an endocrine-disrupting chemical that causes harmful effects to human health. Chlorogenic acid is the major dietary polyphenol present in various foods and beverages. The aim of the present study was to evaluate the protective role of chlorogenic acid in anemia and mineral disturbance occurring in OP toxicity in rats. Thirty-two male albino rats were divided into four equal groups (8 rats/group) as follows. The first (control) group was treated daily with an oral dose of 1 ml saline for two weeks...
May 10, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28488442/stable-benzacridine-pigments-by-oxidative-coupling-of-chlorogenic-acid-with-amino-acids-and-proteins-toward-natural-product-based-green-food-coloring
#15
Mariagrazia Iacomino, Fabian Weber, Maike Gleichenhagen, Valeria Pistorio, Lucia Panzella, Elio Pizzo, Andreas Schieber, Marco d'Ischia, Alessandra Napolitano
The occasional greening of sweet potatoes and other plant tissues observed during cooking or other food processing has been shown to arise from the autoxidative coupling of chlorogenic acid (CGA, 5-caffeoylquinic acid) with amino acid components, leading to trihydroxybenzacridine pigments. To explore the potential of this reaction for food coloring, we report herein the optimized biomimetic preparation of trihydroxybenzacridine pigments from CGA and amino acids such as glycine and lysine, their straightforward purification by gel filtration chromatography, the UHPLC-MS/MS analysis of the purified pigment fraction, and a detailed characterization of the pH-dependent trihydroxybenzacridine chromophore...
May 16, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28484711/rapid-identification-and-isolation-of-inhibitors-of-rat-lens-aldose-reductase-and-antioxidant-in-maackia-amurensis
#16
Set Byeol Kim, Seung Hwan Hwang, Zhiqiang Wang, Jae Myung Yu, Soon Sung Lim
Oxidative stress and aldose reductase activity have been implicated in the development of diabetic complications. In this study, the antioxidant and aldose reductase (AR) inhibitory effects of Maackia amurensis (MA) were investigated. The ethyl acetate fraction of the MA extract showed the highest inhibitory activity in antioxidant and rat lens AR (RLAR). To identify and isolate the active components in the ethyl acetate fraction of the MA extract, high-speed countercurrent chromatography and Sephadex LH-20 column chromatography were performed and guided by an offline HPLC-ABTS assay and HPLC microfractionation AR assay...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28481054/total-detection-of-tianma-toutong-tablets-for-quality-consistency-by-a-five-wavelength-fusion-fingerprint-and-chemometrics
#17
Zhe Yang, Guo-Xiang Sun
A fingerprint method was developed and combined with chemometrics for the quality evaluation of Tianma Toutong tablets, which are herbal medicine tablets used to treat migraine. Samples were analyzed by high-performance liquid chromatography, where five single-wavelength profiles (203, 232, 254, 280 and 310 nm) were fused to generate a five-wavelength fusion fingerprint and were also used for the quantitative analysis of seven chemical markers (gastrodin, caffeic acid, hesperidin, isoimperatorin, chlorogenic acid, ferulic acid and imperatorin)...
May 8, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28479099/protective-effect-of-chlorogenic-acid-against-methotrexate-induced-oxidative-stress-inflammation-and-apoptosis-in-rat-liver-an-experimental-approach
#18
Nemat Ali, Summya Rashid, Sana Nafees, Syed Kazim Hasan, Ayaz Shahid, Ferial Majed, Sarwat Sultana
Methotrexate (MTX) is a drug which is used to treat different types of cancers but hepatotoxicity limits its clinical use. Chlorogenic acid (CGA) is one of the most abundant naturally occurring polyphenols in the human diet. Here, we assessed the effect of CGA against MTX-induced hepatotoxicity and investigated the underlying possible mechanisms in Wistar Rats. Rats were pre-treated with CGA (50 or 100 mg kg/b.w) and administered a single dose of MTX (20 mg/kg, b.w.). MTX caused hepatotoxicity as evidenced by significant increase in serum toxicity markers, histopathological changes...
May 4, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28476713/efficacy-of-differently-applied-tyrosine-and-tryptophan-for-modulation-of-phenolic-metabolism-in-trachyspermum-ammi-l-sprague-seedlings
#19
Saqib Mahmood, Tariq Mahmood, Iqbal Hussian, Sadia Javed, Beenish Afzal, Freeha Ghaffar, Muhammad Iqbal, Muhammad Akram, Syed Muhammad Ali Shah
Phenolics are pharmaceutically important molecules. Tyrosine and tryptophan are precursors of phenolic metabolism. It was aimed to investigate the potential of exogenously introduced precursors on the phenolic contents in Trachyspermum ammi (L.) Sprague seedlings. The seeds of two local varieties (Chakwal and Desi) were grown in completely randomized design in a growth chamber at 19 ± 2°C with two amino acids (tyrosine and tryptophan) applied (priming and supplementation in rooting medium) at two treatment levels (0, and 1%)...
September 2016: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28472287/optimized-and-validated-hplc-analysis-of-st-john-s-wort-extract-and-final-products-by-simultaneous-determination-of-major-ingredients
#20
Konstantina Zeliou, Nikos I Kontaxis, Evangelia Margianni, Christos Petrou, Fotini N Lamari
Aim of this work was to develop a validated high performance liquid chromatography method for the analysis of extracts and final products of St. John's wort, according to international guidelines for bioanalytical method validation. Chromatographic separation was performed on a C18 column with a combination of gradient and isocratic steps; the mobile phase composed of ammonium acetate solution (pH 4.5; 10 mM), acetonitrile and methanol. Quantification and method validation was performed using extract spiked with external reference standards of chlorogenic acid, rutin, hyperoside, isoquercitrin, quercetin and hypericin...
May 3, 2017: Journal of Chromatographic Science
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