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https://www.readbyqxmd.com/read/28319642/therapeutic-efficacy-of-nanocomplex-of-poly-ethylene-glycol-and-catechin-for-dry-eye-disease-in-a-mouse-model
#1
Hyesook Lee, Whuisu Shim, Chae Eun Kim, So Yeon Choi, Haeshin Lee, Jaewook Yang
Purpose: We investigated the possibility of the nanocomplex of poly(ethylene glycol) (PEG) and catechin as a new biomedical material to treat dry eye disease. Methods: NOD.B10.H2b mice were exposed to an air draft and injected with scopolamine for 10 days. Ten days later, the mice were treated with normal saline (n = 11), 1% catechin (n = 11), 1% PEG (n = 11), and 1% catechin/PEG nanocomplex solution mixture containing catechin and PEG at weight ratios of 1:1 (CP1, n = 11), 1:5 (CP5, n = 11), and 1:10 (CP10, n = 11)...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28317771/quinones-as-strecker-degradation-reagents-in-wine-oxidation-processes
#2
Carla Maria Oliveira, Sónia A O Santos, Armando J D Silvestre, António S Barros, António César Silva Ferreira, Artur M S Silva
The Strecker aldehydes formed during the reaction between α-amino acids (phenylalanine or methionine) and either gallic acid, caffeic acid or (+)-catechin ortho-quinones were evaluated in wine-model systems. It was demonstrated that phenylacetaldehyde was formed by quinone intermediates at wine pH. The highest amounts of phenylacetaldehyde during the 10days of experiment (69±5µg/L/day; 7x>Control) were obtained from (+) catechin, followed by gallic acid (61±4µg/L/day; 6x>Control) and caffeic acid (41±4µg/L/day; 4x>Control)...
August 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28317750/effects-of-storage-time-and-temperature-on-lipid-oxidation-of-egg-powders-enriched-with-natural-antioxidants
#3
Paula Toshimi Matumoto-Pintro, Alice Eiko Murakami, Ana Carolina Pelaes Vital, Camila Croge, Denise Felix da Silva, Ivan Camilo Ospina-Roja, Ana Flávia Quiles Garcia Guerra
The lipid fraction of egg powder may be affected by storage conditions due to the development of oxidative rancidity caused by polyunsaturated fatty acids. This study evaluated egg powders enriched with antioxidants [tocopherol, catechin, lycopene, and butylated hydroxyanisole (BHA)] for conjugated dienes (during a 90-day period) and for malonaldehydes (during a 210-day period) at 25±2 and 4±1°C. The presence of lycopene and BHA increases the total phenolic compounds in the enriched egg powders, and BHA exhibits the most antioxidant activity, as quantified by an ABTS assay...
August 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28317281/comparison-of-dietary-polyphenols-for-protection-against-molecular-mechanisms-underlying-non-alcoholic-fatty-liver-disease-in-a-cell-model-of-steatosis
#4
Hossein Rafiei, Kosar Omidian, Brian Bandy
SCOPE: Dietary polyphenols have shown promise in protecting the liver against non-alcoholic fatty liver disease. The relative effectiveness and mechanisms of different polyphenols however is mostly unknown. METHODS AND RESULTS: In a model of steatosis using HepG2 hepatocytes, we evaluated the protective effects of different classes of polyphenols and the contributing mechanisms. Treatment of the cells with oleic acid increased ROS generation and expression of TNFα, decreased expression of UCP2 and decreased mitochondrial content and markers of biogenesis...
March 20, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28315389/variations-in-the-chemical-composition-and-content-of-salicylic-glycosides-in-the-bark-of-salix-purpurea-from-natural-locations-and-their-significance-for-breeding
#5
Paweł Sulima, Mirosława Krauze-Baranowska, Jerzy Andrzej Przyborowski
Willow bark is one of the few plant raw materials which contain natural active substances that have analgesic, fever-reducing, anti-inflammatory and anti-rheumatic effects. Salix purpurea, listed as widespread and common in many countries, belongs to the willow species with the highest content of salicylic compounds. The chemical composition and content of major salicylic glycosides (SGs) in the bark of S. purpurea genotypes from natural locations were investigated in this study to evaluate their applicability for pharmaceutical processing and creative breeding...
March 15, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28303053/comparison-of-color-anti-nutritional-factors-minerals-phenolic-profile-and-protein-digestibility-between-hard-to-cook-and-easy-to-cook-grains-from-different-kidney-bean-phaseolus-vulgaris-accessions
#6
Naincy Parmar, Narpinder Singh, Amritpal Kaur, Sheetal Thakur
The present study was aimed to evaluate the differences among anti-nutritional factors in relation to mineral absorption and protein digestibility of Easy-to-cook (ETC) and Hard-to-cook (HTC) grains from different kidney bean (KB) accessions.HTC grains showed lower a* (redness to yellowness) and b* (greenness to blueness) values and L* value than ETC grains. HTC grains had significantly higher Ca and Zn and lower Cu, Mn and Fe than ETC grains. ETC and HTC grains showed significant variation in mineral, total phenolic content (TPC), tannin and phytic acid content...
March 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28303043/ultrasound-assisted-extraction-of-polyphenols-and-their-distribution-in-whole-mung-bean-hull-and-cotyledon
#7
Barinderjit Singh, Narpinder Singh, Sheetal Thakur, Amritpal Kaur
In this study, extraction of polyphenols using different solvents (acetone, ethanol, methanol and water) with ultrasound and conventional method from whole mung bean (WMB), hull and cotyledon was conducted. Total phenolic content (TPC), total flavonoids content (TFC), total antioxidant activities (TAA), ferric reducing power (FRP) and DPPH radical scavenging activity were determined. Ultrasound treated extracts exhibited higher TPC, TFC, TAA, FRP and DPPH in different mung bean fractions than CSE. Among the solvents, acetone showed better TPC, TFC, TAA, FRP and DPPH...
March 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28303042/effect-of-dehulling-germination-and-cooking-on-nutrients-anti-nutrients-fatty-acid-composition-and-antioxidant-properties-in-lentil-lens-culinaris
#8
R S Pal, Anuradha Bhartiya, Pradhuman Yadav, Lakshmi Kant, K K Mishra, J P Aditya, A Pattanayak
The changes in chemical composition, antioxidant activity and fatty acid composition of lentil flour after dehulling, germination and cooking of seeds were investigated. Dehulling showed no significant effect on protein content, however, protein content decreased in most of the varieties after germination and cooking. Total soluble sugars (TSS) content increased significantly after dehulling (2.0-41.64 %) and cooking (2.08-31.07 %) whereas, germination had no significant effect on TSS content. Total lipids increased significantly after dehulling (21...
March 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28300698/antibacterial-screening-of-rumex-species-native-to-the-carpathian-basin-and-bioactivity-guided-isolation-of-compounds-from-rumex-aquaticus
#9
Orsolya Orbán-Gyapai, Erika Liktor-Busa, Norbert Kúsz, Dóra Stefkó, Edit Urbán, Judit Hohmann, Andrea Vasas
Plants belonging to the genus Rumex (family Polygonaceae) are used worldwide in traditional medicine for the treatment of various diseases caused by different microorganisms (e.g. bacteria-related dermatologic conditions, dysentery and enteritis). The present study focused on the antibacterial screening of Rumex species native to the Carpathian Basin, and isolation of compounds from one of the most efficient species, Rumex aquaticus. The antibacterial effects of n-hexane, chloroform and aqueous fractions of methanol extracts prepared from different parts of 14 Rumex species (R...
March 11, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28292023/green-tea-and-its-anti-angiogenesis-effects
#10
REVIEW
Bahman Rashidi, Mehrnoush Malekzadeh, Mohammad Goodarzi, Aria Masoudifar, Hamed Mirzaei
The development of new blood vessels from a pre-existing vasculature (also known as angiogenesis) is required for many physiological processes including embryogenesis and post-natal growth. However, pathological angiogenesis is also a hallmark of cancer and many ischaemic and inflammatory diseases. The pro-angiogenic members of the VEGF family (vascular endothelial growth factor family), VEGF-A, VEGF-B, VEGF-C, VEGF-D and placental growth factor (PlGF), and the related receptors, VEGFR-1, VEGFR-2 and VEGFR-3 have a central and decisive role in angiogenesis...
March 8, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28290275/binding-of-tea-catechins-to-rice-bran-protein-isolate-interaction-and-protective-effect-during-in-vitro-digestion
#11
Meng Shi, Long-Yue Huang, Ning Nie, Jian-Hui Ye, Xin-Qiang Zheng, Jian-Liang Lu, Yue-Rong Liang
Rice bran protein isolate (RBPI) was prepared from defatted rice bran and used to deliver tea catechins. RBPI had the high adsorption selectivity for tea catechins over caffeine. The adsorption characteristics of tea catechins onto RBPI were determined over a range of time (0-300min), concentration (0.25-3.5gL(-1)) and temperatures (5°C, 20°C and 35°C). The adsorption kinetic data of EGCg and total catechins (TC) onto RBPI showed excellent fitness with the pseudo-second-order model, indicating that chemisorption is the dominating process...
March 2017: Food Research International
https://www.readbyqxmd.com/read/28288931/pouteria-torta-epicarp-as-a-useful-source-of-%C3%AE-amylase-inhibitor-in-the-control-of-type-2-diabetes
#12
Paloma Michelle de Sales, Paula Monteiro de Souza, Mariana Dartora, Inês Sabioni Resck, Luiz Alberto Simeoni, Yris Maria Fonseca-Bazzo, Pérola de Oliveira Magalhães, Dâmaris Silveira
Type 2 diabetes plays a major role in public health, affecting about 400 million adults. One of the used strategies to control type 2 diabetes is the inhibition of α-amylase activity to reduce post-prandial blood glucose levels. Therefore, in past decades, the search of new α-amylase inhibitors has led to the evaluation of natural products as a source of these compounds. Pouteria torta (Sapotaceae) is widespread in Brazil and bears edible fruits. Epicarp and pulp crude extracts of fresh fruits were studied for in vitro α-amylase inhibition activity...
March 10, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28287271/a-new-catechin-derivative-from-the-fruits-of-rosa-sterilis-s-d-shi
#13
Xu-Lu Luo, Han-Long Dan, Na Li, Yong-He Li, Ying-Jun Zhang, Ping Zhao
A new catechin derivative named as sterilin A (1), and three known compounds, (+)-catechin (2), kaji-ichigoside F1 (3) and 2α,3α,19α-trihydroxyurs-12-en-28-oic acid-28-O-β-D-xylopyranosyl-(1 → 2)-β-D-glucopyranoside (4), was isolated from the fresh fruits of Rosa sterilis. Their structures were elucidated by means of extensive spectroscopic analysis and by comparison with data reported in the literatures.
March 13, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28286519/erbb-proteins-as-molecular-target-of-dietary-phytochemicals-in-malignant-diseases
#14
REVIEW
Alexandru Filippi, Oana-Alina Ciolac, Constanța Ganea, Maria-Magdalena Mocanu
ErbB proteins overexpression, in both normal and mutated forms, is associated with invasive forms of cancer prone to metastasis and with stronger antiapoptotic mechanisms and therefore more challenging to treat. Downstream effectors of ErbB receptors mediating these phenotypic traits include MAPK, STAT, and PI3K/AKT/mTOR pathways. Various phytochemical compounds were studied for their large number of biological effects including anticancer activity. Among these compounds, epigallocatechin-3-gallate (EGCG), the main catechin from green tea leaves, and curcumin, component of the curry powder, constituted the object of numerous studies...
2017: Journal of Oncology
https://www.readbyqxmd.com/read/28286171/epigallocatechin-3-gallate-increases-autophagy-signaling-in-resting-and-unloaded-plantaris-muscles-but-selectively-suppresses-autophagy-protein-abundance-in-reloaded-muscles-of-aged-rats
#15
Hideyuki Takahashi, Yutaka Suzuki, Junaith S Mohamed, Takafumi Gotoh, Suzette L Pereira, Stephen E Alway
We have previously found that Epigallocatechin-3-gallate (EGCg), an abundant catechin in green tea, reduced apoptotic signaling and improved muscle recovery in response to reloading after hindlimb suspension (HS). In this study, we investigated if EGCg altered autophagy signaling in skeletal muscle of old rats in response to HS or reloading after HS. Fischer 344×Brown Norway inbred rats (age 34months) were given 1ml/day of purified EGCg (50mg/kg body weight), or the same sample volume of the vehicle by gavage...
March 7, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28285951/potential-role-of-green-tea-catechins-in-the-management-of-oxidative-stress-associated-infertility
#16
REVIEW
Shubhadeep Roychoudhury, Ashok Agarwal, Gurpriya Virk, Chak-Lam Cho
Reactive oxygen species (ROS) are present in low concentrations in the genital tracts of males and females. Excessive ROS lead to oxidative stress, which damages DNA, lipids and proteins. Such molecular changes result in compromised vitality, increased morphological defects and decreased sperm motility in the male. In the female, oxidative stress interferes with oocyte maturation, and may inhibit in-vitro maturation of the oocyte. Recently, green tea supplementation has been reported to possess properties that may improve the quality of male and female gametes largely due to the ability of catechin polyphenols to quench ROS...
February 27, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28283247/environmentally-friendly-and-non-polluting-solvent-pretreatment-of-palm-samples-for-polyphenol-analysis-using-choline-chloride-deep-eutectic-solvents
#17
Najing Fu, Runqiu Lv, Zhixin Guo, Yiwei Guo, Xiaoyu You, Baokun Tang, Dandan Han, Hongyuan Yan, Kyung Ho Row
In this work, choline chloride (ChCl) deep eutectic solvents (DESs) were evaluated for the pretreatment of palm samples in the analysis of polyphenols, such as protocatechuic acid, catechins, epicatechin, and caffeic acid. During the enrichment step of the pretreatment, eight DESs comprising ChCl with ethylene glycol (EG), glycerol (Gly), xylitol (Xyl), phenol (Ph), formic acid (FA), citric acid (CiA), oxalic acid (OA), or malonic acid (MA), were prepared and applied to the reflux extraction of polyphenols from palm samples...
February 21, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28282293/preliminary-phytochemical-analysis-and-evaluation-of-antioxidant-cytotoxic-and-inhibition-of-lipopolysaccaride-induced-nos-inos-expression-in-balb-c-mice-liver-by-ziziphus-oenoplia-mill-fruit
#18
Ramaraj Thirugnanasampandan, Gunasekar Ramya, Gunasekaran Bhuvaneswari, Srinivasan Aravindh, Suresh Vaishnavi, Madhusudhanan Gogulramnath
BACKGROUND: Ziziphus oenoplia Mill. is an ethnomedicinal plant and its fruit has been traditionally used by Puliar tribes of Anamalai Hills, Tamil Nadu, India to treat various ailments. Phytochemical analysis, antioxidant, cytotoxic and inducible nitric oxide synthase (iNOS) gene downregulation activities of Z. oenoplia fruit (ZOF) were studied. METHODS: To explore bioactive compounds present in the ripened fruits, high-performance thin-layer chromatography (HPTLC) and gas chromatography/mass spectrometry (GC-MS) analysis were done...
March 10, 2017: Journal of Complementary & Integrative Medicine
https://www.readbyqxmd.com/read/28279122/biochemical-changes-induced-by-grapeseed-extract-and-low-level-laser-therapy-administration-during-intraoral-wound-healing-in-rat-liver-an-experimental-and-in-silico-study
#19
Mehmet Erman Erdemli, Ramin Ekhteiari Salmas, Serdar Durdagi, Hasan Akgul, Mehmet Demirkol, Zeynep Aksungur, Zeliha Selamoglu
In the present study, the changes that occur in rat liver tissue as a result of the use of grapeseed extract (GSE) and low level laser therapy (LLLT) in intraoral wound healing are analyzed using biochemical parameters. Diode laser application groups received 8 J/cm(2) dose LLLT once a day for 4 days (810 nm wavelength, continuous mode, 0.25 W, 9 sec.). As a result of the biological parameter analysis, it was determined that the oxidative damage caused by the intraoral wounds and recovery period on 7(th) and 14(th) days could be substantially removed with GSE applications that have antioxidant capacity especially in rat liver tissue...
March 9, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28278676/comparative-analytical-study-of-the-selected-wine-varieties-grown-in-montenegro
#20
Neda O Đorđević, Miroslav M Novaković, Boris Pejin, Jelena J Mutić, Vlatka E Vajs, Snežana B Pajović, Vele V Tešević
Samples of the selected red wine varieties grown in Montenegro (Merlot, Cabernet Sauvignon and Vranac; vintages 2010-2012) were compared according to total phenolic content, anti-DPPH radical activity, phenolic profile and elemental composition. All the samples showed profound anti-DPPH radical activity, due to high content of total phenolic compounds (R = 0.92). The most abundant phenolics were catechin and gallic acid with the highest values recorded for Merlot 2012 (43.22 and 28.65 mg/L, respectively)...
February 13, 2017: Natural Product Research
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