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Procyanidin

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https://www.readbyqxmd.com/read/28635280/anti-adhesive-activity-and-metabolomics-analysis-of-rat-urine-after-cranberry-vaccinium-macrocarpon-aiton-administration
#1
Gregorio Peron, Pellizzaro Anna, Brun Paola, Elisabetta Schievano, Stefano Mammi, Stefania Sut, Ignazio Castagliuolo, Stefano Dall'Acqua
Cranberry (Vaccinium macrocarpon Aiton) is used to treat non-complicated urinary tract infections (UTIs). A-type procyanidins (PAC-A) are considered the active constituents being able to inhibit bacterial adhesion to the urinary epithelium. However, there are doubts about PAC-A role in UTIs, due to their poor bioavailability, extensive metabolism, limited knowledge about urinary excretion and contradictory clinical trials. The effects of 35 days cranberry (11 mg/kg PAC-A, 4 mg/kg PAC-B) supplementation were studied in healthy rats using a UPLC-MS-based metabolomics approach...
June 21, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28625677/profiling-of-vitis-vinifera-l-canes-poly-phenolic-compounds-using-comprehensive-two-dimensional-liquid-chromatography
#2
Lidia Montero, Vania Sáez, Dietrich von Baer, Alejandro Cifuentes, Miguel Herrero
Grapevine canes, a pruning-derived by-product, possess a great amount of bioactive (poly)phenolic compounds belonging to different chemical classes, thus, having a good potential for further valorization. However, in order to properly design valorization strategies, the precise chemical composition of this material has to be known. Up to now, this chemical characterization has been based on analysis of different groups of components individually, due to difficulties related to their huge chemical variability...
June 8, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28605979/phytochemical-investigation-of-rumex-thyrsiflorus-fingerh
#3
Orsolya Orbán-Gyapai, Peter Forgo, Judit Hohmann, Andrea Vasas
In the course of our pharmacological screening of Polygonaceae species occurring in the Carpathian Basin the extracts prepared from the roots of Rumex thyrsiflorus showed promising antiproliferative, xanthine oxidase inhibitory and antibacterial activities. The present work deals with the isolation of compounds from the root of the plant. After multistep separation process, four compounds were obtained from the n-hexane, chloroform and ethyl acetate soluble fractions of the methanol extract of the root. The structures of the isolated compounds were determined as 1-palmitoylglycerol, β-sitosterol, (-)-epicatechin, and procyanidin B5...
June 2017: Acta Biologica Hungarica
https://www.readbyqxmd.com/read/28589723/molecular-interaction-between-salivary-proteins-and-food-tannins
#4
Mafalda Silva, Ignacio García-Estévez, Elsa Brandão, Nuno Mateus, Victor De Freitas, Susana Soares
Polyphenols interaction with salivary proteins (SP) has been related with organoleptic features such as astringency. The aim of this work was to study the interaction between some human SP and tannins through two spectroscopic techniques, fluorescence quenching and Saturation Transfer Difference-Nuclear Magnetic Resonance (STD-NMR). Generally, the results showed a significant interaction between SP and both condensed tannins and ellagitannins. Herein, STD-NMR proved to be a useful tool to map tannins' epitopes of binding, while fluorescence quenching allowed to discriminate binding affinities...
June 7, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28587348/hepatoprotective-effects-of-litchi-litchi-chinensis-procyanidin-a2-on-carbon-tetrachloride-induced-liver-injury-in-icr-mice
#5
Lih-Geeng Chen, Cheng-Wei Chang, Jwu-Guh Tsay, Brian Bor-Chun Weng
Drug tolerance, lacking liver regenerative activity and inconclusive inhibition of steatosis and cirrhosis by silymarin treatment during chronic liver injury have increased the demand for novel alternative or synergistic treatments for liver damage. Litchi fruit is abundant in polyphenolic compounds and is used in traditional Chinese medicine for treatments that include the strengthening of hepatic and pancreatic functions. Unique polyphenolic compounds obtained from litchi pericarp extract (LPE) were studied in vitro and in vivo for hepatoprotection...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28585905/polyphenols-from-flowers-of-magnolia-coco-and-their-anti-glycation-effects
#6
Nana Kato, Satoko Kawabe, Natsuki Ganeko, Morio Yoshimura, Yoshiaki Amakura, Hideyuki Ito
We investigated the inhibitory effects of several plant extracts on advanced glycation end-products (AGEs) formation. Among tested samples, the flower extract of Magnolia coco showed significant inhibition of AGE formation. We isolated and characterized procyanidin oligomer and four other compounds from the flowers, and evaluated their inhibitory effects on AGE formation and the AGE-derived crosslink-cleaving activity of the isolated compounds.
July 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28570746/influence-of-extremely-low-frequency-magnetic-fields-on-ca-2-signaling-and-double-messenger-system-in-mice-hippocampus-and-reversal-function-of-procyanidins-extracted-from-lotus-seedpod
#7
Haihui Zhang, Yuanyuan Dai, Yanxiang Cheng, Yuanqing He, Zandile Manyakara, Yuqing Duan, Guibo Sun, Xiaobo Sun
This research investigated the influence of extremely low frequency magnetic fields (ELF-MF; 50 Hz, 8 mT, 4 h per day, for 28 days) on calcium ion signaling and the double messenger system in the hippocampus of mice. Messengers that were studied included: G-protein, Ins(1,4,5)P3 (IP3 ), diacylglycerol (DAG), cAMP-dependent protein kinase (PKA), and Ca(2+) -dependent protein kinase C (PKC). The results showed that ELF-MF caused an increase in the levels of Gi protein, IP3, DAG, PKA and PKC beta, calcium and calmodulin-dependent protein phosphatase calcineuring (PP2B), and intracellular Ca(2+) content, and a decrease in calcium/calmodulin-dependent protein kinase II (CaMK II) and PKC alpha...
June 1, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28567675/impact-of-metal-stress-on-the-production-of-secondary-metabolites-in-pteris-vittata-l-and-associated-rhizosphere-bacterial-communities
#8
Hoang Nam Pham, Serge Michalet, Josselin Bodillis, Tien Dat Nguyen, Thi Kieu Oanh Nguyen, Thi Phuong Quynh Le, Mohamed Haddad, Sylvie Nazaret, Marie-Geneviève Dijoux-Franca
Plants adapt to metal stress by modifying their metabolism including the production of secondary metabolites in plant tissues. Such changes may impact the diversity and functions of plant associated microbial communities. Our study aimed to evaluate the influence of metals on the secondary metabolism of plants and the indirect impact on rhizosphere bacterial communities. We then compared the secondary metabolites of the hyperaccumulator Pteris vittata L. collected from a contaminated mining site to a non-contaminated site in Vietnam and identified the discriminant metabolites...
May 31, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28536059/current-state-of-knowledge-on-the-traditional-uses-phytochemistry-and-pharmacology-of-the-genus-hymenaea
#9
REVIEW
Pone Kamdem Boniface, Sabrina Baptista Ferreira, Carlos Roland Kaiser
ETHNOPHARMACOLOGICAL RELEVANCE: Plants of the genus Hymenaea (Fabaceae) are used in South American and Asian traditional medicines to treat a multitude of disorders, like cough, diarrhea, dysentery, intestinal colic, pulmonary weakness, asthma, anemia, sore throat, and for the treatment of kidney problems, viral related disorders, chronic cystitis, bronchitis, and bladder infections. Some Hymenaea species are also used as vermifuge, and for the treatment of arthritis, and inflammation conditions...
May 21, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28528103/addition-of-exogenous-enzymes-to-diets-containing-grape-pomace-effects-on-intestinal-utilization-of-catechins-and-antioxidant-status-of-chickens
#10
S Chamorro, A Viveros, A Rebolé, I Arija, C Romero, I Alvarez, A Rey, A Brenes
Grape pomace (GP) is a rich source of polyphenols with antioxidant capacity. An experiment was conducted to study the effect of GP phenolic compounds included at 5 and 10%, and the addition (individually or combined) of hydrolyzing enzymes (carbohydrase enzyme complex and tannase at 500ppm) on intestinal utilization of catechins and antioxidant status in broiler chickens. A diet supplemented with 200ppm of α-tocopheryl acetate was also used. Our findings demonstrate the capacity of chickens to digest the monomeric (catechin, epicatechin, gallic acid, and epicatechin-O-gallate) and dimeric (procyanidin B1 and procyanidin B2) catechins present in grape pomace...
June 2017: Food Research International
https://www.readbyqxmd.com/read/28522973/profiling-and-distribution-of-metabolites-of-procyanidin-b2-in-mice-by-uplc-dad-esi-it-tof-ms-n-technique
#11
Ying Xiao, Zhongzhi Hu, Zhiting Yin, Yiming Zhou, Taiyi Liu, Xiaoli Zhou, Dawei Chang
The metabolite profiles and distributions of procyanidin B2 were qualitatively described using UPLC-DAD-ESI-IT-TOF-MS(n) without help of reference standards, and a possible metabolic pathway was proposed in the present study. Summarily, 53 metabolites (24 new metabolites) were detected as metabolites of procyanidin B2, and 45 of them were tentatively identified. Twenty seven metabolites were assigned as similar metabolites of (-)-epicatechin by scission of the flavanol interflavanic bond C4-C8, including 16 aromatic metabolites, 5 conjugated metabolites, 3 ring-cleavage metabolites, and 2 phenylvalerolactone metabolites...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28514152/hepatoprotective-properties-of-a-polyphenol-enriched-fraction-from-annona-crassiflora-mart-%C3%A2-fruit-peel-against-diabetes-induced-oxidative-and-nitrosative-stress
#12
Allisson Benatti Justino, Mariana Nunes Pereira, Leonardo Gomes Peixoto, Danielle Diniz Vilela, Douglas Carvalho Caixeta, Adriele Vieira de Souza, Renata Roland Teixeira, Heitor Cappato Guerra Silva, Francyelle Borges Rosa de Moura, Izabela Barbosa Moraes, Foued Salmen Espindola
A polyphenol-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...
June 7, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28505543/chronic-administration-of-apple-polyphenols-ameliorates-hyperglycaemia-in-high-normal-and-borderline-subjects-a-randomised-placebo-controlled-trial
#13
Toshihiko Shoji, Mitsuhiro Yamada, Tomisato Miura, Kazuaki Nagashima, Kasane Ogura, Nobuya Inagaki, Mari Maeda-Yamamoto
AIMS: We previously reported that apple polyphenols (AP) and their major active components, procyanidins, had beneficial effects on glucose homeostasis and diabetes in diabetic ob/ob mice. The present study was performed to evaluate the effects of chronic AP administration on glucose tolerance in high-normal and borderline human subjects. METHODS: Subjects (n=65) with a fasting plasma glucose (FPG) level of 100-125mg/dL determined during a recent health check-up were randomised to receive tablets containing AP (600mg/day) or placebo tablets for 12weeks in a double-blinded, placebo-controlled clinical trial...
July 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28497962/potential-of-polygonum-cuspidatum-root-as-an-antidiabetic-food-dual-high-resolution-%C3%AE-glucosidase-and-ptp1b-inhibition-profiling-combined-with-hplc-hrms-and-nmr-for-identification-of-antidiabetic-constituents
#14
Yong Zhao, Martin Xiaoyong Chen, Kenneth Thermann Kongstad, Anna Katharina Jäger, Dan Staerk
The worldwide increasing incidence of type 2 diabetes has fueled an intensified search for food and herbal remedies with preventive and/or therapeutic properties. Polygonum cuspidatum Siebold & Zucc. (Polygonaceae) is used as a functional food in Japan and South Korea, and it is also a well-known traditional antidiabetic herb used in China. In this study, dual high-resolution α-glucosidase and protein-tyrosine phosphatase 1B (PTP1B) inhibition profiling was used for the identification of individual antidiabetic constituents directly from the crude ethyl acetate extract and fractions of P...
June 7, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28490110/multivariate-statistical-analysis-of-the-polyphenolic-constituents-in-kiwifruit-juices-to-trace-fruit-varieties-and-geographical-origins
#15
Jing Guo, Yahong Yuan, Pei Dou, Tianli Yue
Fifty-one kiwifruit juice samples of seven kiwifruit varieties from five regions in China were analyzed to determine their polyphenols contents and to trace fruit varieties and geographical origins by multivariate statistical analysis. Twenty-one polyphenols belonging to four compound classes were determined by ultra-high-performance liquid chromatography coupled with ultra-high-resolution TOF mass spectrometry. (-)-Epicatechin, (+)-catechin, procyanidin B1 and caffeic acid derivatives were the predominant phenolic compounds in the juices...
October 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28487962/embryotoxicity-estimation-of-commonly-used-compounds-with-embryonic-stem-cell-test
#16
Hui Liu, Caiping Ren, Weidong Liu, Xingjun Jiang, Lei Wang, Bin Zhu, Wei Jia, Jianxing Lin, Jun Tan, Xiuying Liu
The embryonic stem cell test (EST), an alternative model to animal studies, is a reliable and scientifically validated in vitro system for testing embryotoxicity. In contrast to most in vivo animal tests, two permanent cell lines, murine fibroblasts (BALB/c‑3T3 cells) and murine embryonic stem cells (mES‑D3 cells), are used in EST instead of animals in standard tests of toxicity. The embryotoxic potential of compounds (non, weak or strong embryotoxicity) may be obtained with a biostatistics‑based prediction model and calculated from three different experimental endpoint values: The potency to inhibit growth of i) BALB/c‑3T3 cells and ii) mES‑D3 cells (IC503T3 and IC50ES) as presented using a cell cytotoxicity assay, and iii) the potency to inhibit differentiation of mES‑D3 cells into contracting cardiomyocytes (ID50 D3) as demonstrated in a mES‑D3 cell differentiation assay...
July 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28472615/interaction-of-procyanidin-b3-with-membrane-lipids-fluorescence-dsc-and-ftir-studies
#17
Sylwia Cyboran-Mikołajczyk, Romuald Żyłka, Piotr Jurkiewicz, Hanna Pruchnik, Jan Oszmiański, Martin Hof, Halina Kleszczyńska
Procyanidins, contained in many products abundant in human diet, exhibit high biological activity. However, this activity has not been fully explained at cellular and molecular levels. In this study, we determine the mechanism of interaction of procyanidin B3 with model lipid membrane. This mechanism was established on the basis of changes induced by B3 in the physical properties of lipid bilayer. The changes were investigated using steady state and time-resolved fluorescence, DSC, and FTIR. We show that procyanidin B3 causes changes in the arrangement of the polar heads of lipids, order of their acyl chains and the main lipid phase transition temperature...
May 1, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28471298/optimized-ultra-high-pressure-assisted-extraction-of-procyanidins-from-lychee-pericarp-improves-the-antioxidant-activity-of-extracts
#18
Ruifen Zhang, Dongxiao Su, Fangli Hou, Lei Liu, Fei Huang, Lihong Dong, Yuanyuan Deng, Yan Zhang, Zhencheng Wei, Mingwei Zhang
To establish optimal ultra-high-pressure (UHP)-assisted extraction conditions for procyanidins from lychee pericarp, a response surface analysis method with four factors and three levels was adopted. The optimum conditions were as follows: 295 MPa pressure, 13 min pressure holding time, 16.0 mL/g liquid-to-solid ratio, and 70% ethanol concentration. Compared with conventional ethanol extraction and ultrasonic-assisted extraction methods, the yields of the total procyanidins, flavonoids, and phenolics extracted using the UHP process were significantly increased; consequently, the oxygen radical absorbance capacity and cellular antioxidant activity of UHP-assisted lychee pericarp extracts were substantially enhanced...
May 4, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28460948/enzymatic-biotransformation-of-polyphenolics-increases-antioxidant-activity-of-red-and-white-grape-pomace
#19
Isabela M Martins, Bruna S Roberto, Jeffrey B Blumberg, C-Y Oliver Chen, Gabriela A Macedo
Grape pomace (GP) is a polyphenolic-rich byproduct of wine production. As most polyphenolics are either bound to cellular matrices or present as free polymeric forms, treatment with hydrolytic enzymes may act to increase GP functionalities. The aim of this study was to examine the impact of tannase alone (T), pectinase plus cellulase (PC) or a mixture of them (TPC) on the hydrolysis of polyphenolics in red GP (RGP), white GP (WGP), and mixed GP (MGP) from Brazilian wine production, as well as antioxidant activity of the products...
November 2016: Food Research International
https://www.readbyqxmd.com/read/28449181/metabolite-profile-and-antiproliferative-effects-in-hacat-cells-of-a-salix-reticulata-extract
#20
Elisabetta Corradi, Nadine Schmidt, Nathalie Räber, Maria De Mieri, Matthias Hamburger, Veronika Butterweck, Olivier Potterat
Phenolic constituents of Salix reticulata (Salicaceae) and antiproliferative activity of an extract and individual compounds were investigated in immortalized human non-tumorigenic keratinocytes (HaCaT). A MeOH extract from aerial parts afforded several flavonoids, including luteolin and apigenin glycosides (2-5 and 9) and catechin (1), two procyanidin fractions, and the phenolic glucosides picein (6), triandrin (7), and salicortin (8). In an adenosine triphosphate assay, the MeOH extract reduced cell viability by approximately 60 % at a concentration of 100 µg/mL...
April 27, 2017: Planta Medica
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