keyword
MENU ▼
Read by QxMD icon Read
search

Green tea extract

keyword
https://www.readbyqxmd.com/read/28221885/antibacterial-and-antiadhesive-activities-of-extracts-from-edible-plants-against-soft-drink-spoilage-by-asaia-spp
#1
Hubert Antolak, Agata Czyzowska, Dorota Kregiel
This study was conducted to investigate the antibacterial and antiadhesive activities of ethanol extracts from five edible plant parts: cinnamon bark ( Cinnamomum zeylanicum ), licorice root ( Glycyrrhiza radix ), nettle leaves ( Urtica dioica ), green tea leaves ( Camellia sinensis ), and elderberry flowers ( Sambucus nigra ). The chemical constituents of the extracts were identified using high-performance liquid chromatography and liquid chromatography plus mass spectrometry. Six strains of Asaia lannensis and Asaia bogorensis bacteria isolated from spoiled commercial fruit-flavored noncarbonated mineral water were used...
January 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28216091/enantiomeric-and-quantitative-analysis-of-volatile-terpenoids-in-different-teas-camellia-sinensis
#2
Yin Zhu, Chen-Yang Shao, Hai-Peng Lv, Yue Zhang, Wei-Dong Dai, Li Guo, Jun-Feng Tan, Qun-Hua Peng, Zhi Lin
Volatile terpenoids play important roles in the formation of tea aroma quality due to their pleasant scents and low odor thresholds. Most volatile terpenoids contain stereogenic centers, which results in various stereo distributions of their enantiomers and diastereoisomers in different types of tea. However, the distribution characteristics of terpenoid enantiomers in teas were still unclear, which poses an obstacle to the scientific understanding of tea aroma. In this work, a new and efficient analysis approach based on headspace solid phase microextraction (HS-SPME)-chiral gas chromatography-mass spectrometry (GC-MS) was established to analyze 12 pairs of familiar terpenoid enantiomers in different teas...
February 10, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28209333/green-tea-extracts-for-the-prevention-of-metachronous-colorectal-polyps-among-patients-who-underwent-endoscopic-removal-of-colorectal-adenomas-a-randomized-clinical-trial
#3
Cheol Min Shin, Dong Ho Lee, A Young Seo, Hyun Joo Lee, Seong Beom Kim, Woo-Chan Son, Young Kyung Kim, Sang Jun Lee, Sung-Hee Park, Nayoung Kim, Young Soo Park, Hyuk Yoon
OBJECTIVES: To determine the preventive effect of green tea extract (GTE) supplements on metachronous colorectal adenoma and cancer in the Korean population. MATERIALS AND METHODS: One hundred seventy-six subjects (88 per each group) who had undergone complete removal of colorectal adenomas by endoscopic polypectomy were enrolled. They were randomized into 2 groups: supplementation group (0.9 g GTE per day for 12 months) or control group without GTE supplementation...
January 29, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28209019/efficacy-of-specific-plant-products-on-microorganisms-causing-dental-caries
#4
M Rajini Kanth, A Ravi Prakash, G Sreenath, Vikram Simha Reddy, S Huldah
INTRODUCTION: Dental caries and periodontal diseases are the most common oral diseases seen globally, both in developed and developing countries. Oral microorganisms that is gram positive and gram negative bacteria are known to be involved in causation of these diseases. Nowadays commercially available dentrifices and mouth rinses are known to contain ingredients that can alter the oral microbial flora and have undesirable side effects such as vomiting, diarrhoea, disarrangement of oral, intestinal flora and tooth staining...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28191529/the-green-tea-polyphenol-epigallocatechin-3-gallate-and-its-beneficial-roles-in-chronic-kidney-disease
#5
REVIEW
Hui Bao, Ai Peng
Chronic kidney disease (CKD), a condition that affects around 10% of the population, has become a significant public health concern. Current therapeutic strategies to slow down the progression of CKD remain limited. Thus, it is urgent to develop new strategies to manage the patients with CKD. Work within the past decade has improved our understanding of the mechanisms contributing to CKD. In particular, oxidative stress as well as inflammation appears to play a pivotal role in CKD progression. ()-Epigallocatechin-3-gallate (EGCG), the major catechin of green tea extract, is known as a powerful antioxidant and reactive oxygen species scavenger...
September 1, 2016: Journal of Translational Internal Medicine
https://www.readbyqxmd.com/read/28190352/polyphenol-interactions-mitigate-the-immunogenicity-and-allergenicity-of-gliadins
#6
Maxime Perot, Roberta Lupi, Sylvain Guyot, Carine Delayre-Orthez, Pascale Gadonna-Widehem, Jean-Yves Thebaudin, Marie Bodinier, Colette Larre
Wheat allergy is an IgE-mediated disorder. Polyphenols, which are known to interact with certain proteins, could be used to reduce allergic reactions. In this study, we screened several polyphenol sources for their ability to interact with gliadins, mask epitopes and impact basophil degranulation. Polyphenol extracts from artichoke leaves, cranberries, apples and green tea leaves were examined. Of these extracts, the first three formed insoluble complexes with gliadins. Only the cranberry and apple extracts masked epitopes in dot blot assays using anti-gliadin IgG and IgE antibodies from patients with wheat allergies...
February 13, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28184158/biological-activity-of-green-synthesized-silver-nanoparticles-depends-on-the-applied-natural-extracts-a-comprehensive-study
#7
Andrea Rónavári, Dávid Kovács, Nóra Igaz, Csaba Vágvölgyi, Imre Miklós Boros, Zoltán Kónya, Ilona Pfeiffer, Mónika Kiricsi
Due to obvious disadvantages of the classical chemical methods, green synthesis of metallic nanoparticles has attracted tremendous attention in recent years. Numerous environmentally benign synthesis methods have been developed yielding nanoparticles via low-cost, eco-friendly, and simple approaches. In this study, our aim was to determine the suitability of coffee and green tea extracts in green synthesis of silver nanoparticles as well as to compare the performance of the obtained materials in different biological systems...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28178749/improving-on-nature-the-role-of-nanomedicine-in-the-development-of-clinical-natural-drugs
#8
Anna Rita Bilia, Vieri Piazzini, Clizia Guccione, Laura Risaliti, Martina Asprea, Giada Capecchi, Maria Camilla Bergonzi
Natural products have been used as a major source of drugs for millennia, and about half of the pharmaceuticals in use today are derived from natural products. However, their efficacy can be limited because of their low hydrophilicity and intrinsic dissolution rate(s), or physical/chemical instability. In addition, they can present scarce absorption, poor pharmacokinetics and bioavailability, scarce biodistribution, first-pass metabolism, trivial penetration and accumulation in the organs of the body, or low targeting efficacy...
February 8, 2017: Planta Medica
https://www.readbyqxmd.com/read/28166943/cold-adaptive-thermogenesis-following-consumption-of-certain-pungent-spice-principles-a-validation-study
#9
Chaitanya Pandit, K R Anilakumar
Identifying a means to activate or potentiate thermogenic mechanisms through ingestion of dietary compounds have important implications in cold endurance and survival. Although many reports discuss the thermogenic potential of spices, it is surprising that none of the studies verify whether consumption of spices can improve cold endurance. In this study, we have attempted to evaluate if ingestion of certain spices can activate heat-generating mechanisms in the body such that a fall in. core body temperature (CBT) can be delayed or prevented when faced with a cold challenge...
February 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28160861/antibacterial-activity-of-epigallocatechin-3-gallate-egcg-and-its-synergism-with-%C3%AE-lactam-antibiotics-sensitizing-carbapenem-associated-multidrug-resistant-clinical-isolates-of-acinetobacter-baumannii
#10
Spencer Lee, Ghaida Saleh Al Razqan, Dong H Kwon
BACKGROUND: Infections caused by Acinetobacter baumannii were responsive to conventional antibiotic therapy. However, recently, carbapenem-associated multidrug resistant isolates have been reported worldwide and present a major therapeutic challenge. Epigallocatechin-3-Gallate (EGCG) extracted from green tea exhibits antibacterial activity. PURPOSE: We evaluated the antibacterial activity of EGCG and possible synergism with antibiotics in carbapenem-associated multidrug resistant A...
January 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28132656/fermented-green-tea-extract-exhibits-hypolipidaemic-effects-through-the-inhibition-of-pancreatic-lipase-and-promotion-of-energy-expenditure
#11
Dae-Bang Seo, Hyun Woo Jeong, Yeon-Ji Kim, Sukyung Kim, Jeongkee Kim, Ji Hae Lee, Kyungmi Joo, Jin Kyu Choi, Song Seok Shin, Sung-Joon Lee
Hyperlipidaemia is a major cause of atherosclerosis and related CVD and can be prevented with natural substances. Previously, we reported that a novel Bacillus-fermented green tea (FGT) exerts anti-obesity and hypolipidaemic effects. This study further investigated the hypotriglyceridaemic and anti-obesogenic effects of FGT and its underlying mechanisms. FGT effectively inhibited pancreatic lipase activity in vitro (IC50, 0·48 mg/ml) and ameliorated postprandial lipaemia in rats (26 % reduction with 500 mg/kg FGT)...
January 30, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28127316/in-vitro-evaluation-of-the-effect-of-herbal-antioxidants-on-shear-bond-strength-of-composite-resin-to-bleached-enamel
#12
Zahra Khamverdi, Parvin Khadem, Aliraza Soltanian, Maryam Azizi
OBJECTIVES: A reduction in bond strength of composite to bleached enamel has been reported immediately after bleaching treatment. Application of some antioxidant agents may decrease the adverse effects of whitening agents on bond strength and enhance composite bond to enamel. This study aimed to assess the effect of green tea, sodium ascorbate, sage and grape seed extract on bond strength of composite to bleached enamel. MATERIALS AND METHODS: In this in-vitro study, 90 human enamel surfaces were randomly divided into six groups as follows (n=15): G1, no bleaching; G2, bleaching with 40% hydrogen peroxide (HP); G3, HP+1000 μmol epigallocatechin gallate (EGCG) for 10 minutes; G4, HP+10% sodium ascorbate for 10 minutes; G5, HP+10% sage for 10 minutes and G6, HP+5% grape seed extract for 10 minutes...
August 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28118673/an-appraisal-of-drug-drug-interactions-with-green-tea-camellia-sinensis
#13
Ahmed A Albassam, John S Markowitz
This review summarizes published in vitro, animal, and clinical studies investigating the effects of green tea (Camellia sinensis) extract and associated catechins on drug-metabolizing enzymes and drug transporters. In vitro studies suggest that green tea extract and its main catechin, (-)-epigallocatechin-3-gallate, to varying degrees, inhibit the activity of CYP1A1, CYP1A2, CYP2B6, CYP2C8, CYP2C9, CYP2D6, and CYP3A4. UGT1A1 and UGT1A4 isoforms were also inhibited by (-)-epigallocatechin-3-gallate. Animal studies suggest green tea extract and/or (-)-epigallocatechin-3-gallate significantly increase the bioavailability of diltazem, verapamil, tamoxifen simvastatin, 5-fluorouracil, and nicardipine...
January 24, 2017: Planta Medica
https://www.readbyqxmd.com/read/28112361/modulation-of-mmp-2-and-mmp-9-secretion-by-cytokines-inducers-and-inhibitors-in-human-glioblastoma-t-98g-cells
#14
M Waheed Roomi, Tatiana Kalinovsky, Matthias Rath, Aleksandra Niedzwiecki
Brain tumors are highly aggressive, characterized by the secretion of high levels of matrix metalloproteinase (MMP)-2 and MMP-9 that degrade the extracellular matrix and basement membrane, allowing cancer cells to spread to distal organs. Various cytokines, mitogens, growth factors, inducers and inhibitors control MMP activity. We investigated the roles of these in the regulation of MMP-2 and MMP-9 in human glioblastoma T-98G cells. Human T-98G cells were grown in DME supplemented with 15% fetal bovine serum and antibiotics in 24-well tissue culture plates...
January 19, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28097041/effect-of-catechins-green-tea-extract-and-methylxanthines-in-combination-with-gentamicin-against-staphylococcus-aureus-and-pseudomonas-aeruginosa-combination-therapy-against-resistant-bacteria
#15
Bibi Sedigheh Fazly Bazzaz, Sahar Sarabandi, Bahman Khameneh, Hossein Hosseinzadeh
OBJECTIVES: Bacterial resistant infections have become a global health challenge and threaten the society's health. Thus, an urgent need exists to find ways to combat resistant pathogens. One promising approach to overcoming bacterial resistance is the use of herbal products. Green tea catechins, the major green tea polyphenols, show antimicrobial activity against resistant pathogens. The present study aimed to investigate the effect of catechins, green tea extract, and methylxanthines in combination with gentamicin against standard and clinical isolates of Staphylococcus aureus (S...
December 2016: Journal of Pharmacopuncture
https://www.readbyqxmd.com/read/28071811/extraction-of-epigallocatechin-gallate-and-epicatechin-gallate-from-tea-leaves-using-%C3%AE-cyclodextrin
#16
Lu Cui, Yuxuan Liu, Ting Liu, Yahong Yuan, Tianli Yue, Rui Cai, Zhouli Wang
Use of organic solvents to extract phenolic compounds from plants may result in environmental pollution and cause health problems in persons. Replacing organic extraction solvents by green extracting agents without affecting the extraction yield is one of the most pressing problems to be solved. The aim of this study is to evaluate the capacity of β-cyclodextrin (β-CD) to recover phenolic compounds from tea leaves. The extract obtained using the ethanol/water mixture presented the highest total phenolic content, followed by those obtained using β-CD solution and water...
January 10, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28071801/formation-and-characterization-of-green-tea-extract-loaded-liposomes
#17
Damla Dag, Mecit Halil Oztop
Green tea extract was encapsulated into liposomes to enhance bioavailability and stability of catechins by protecting their functional properties simultaneously. Encapsulation was achieved by dispersing 1% (w/v) soy lecithin through high pressure homogenization (microfluidization) and ultrasonication. Effects of homogenization type and pH of the dispersing medium on the physical properties and stability of the liposomes during 1-mo storage period were investigated. Mean particle size, total phenolic content by Folin-Ciocalteu method and antioxidant activity by 2-diphenyl-1-picrylhydrazyl radical scavenging and ferric reducing-antioxidant power methods, and transmission electron microscopy (TEM) experiments were conducted for characterization...
January 10, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28038881/green-tea-camellia-sinensis-for-patients-with-knee-osteoarthritis-a-randomized-open-label-active-controlled-clinical-trial
#18
Mohammad Hashem Hashempur, Sara Sadrneshin, Seyed Hamdollah Mosavat, Alireza Ashraf
BACKGROUND: Green tea is known as a dietary supplement and a novel functional food worldwide. Since there are increasing preclinical evidence about efficacy of green tea for treating osteoarthritis, this study has aimed at assessing its efficacy and safety for patients with knee osteoarthritis. METHODS: This is a randomized open-label active-controlled clinical trial. As many as fifty adults with osteoarthritis of knee were randomly allocated to receive the green tea extract (in dosage form of tablet) plus diclofenac tablet as "intervention group"; or: diclofenac tablet alone as "control group" for a period of four weeks...
December 18, 2016: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28038359/green-tea-extract-treatment-reduces-nf%C3%AE%C2%BAb-activation-in-mice-with-diet-induced-nonalcoholic-steatohepatitis-by-lowering-tnfr1-and-tlr4-expression-and-ligand-availability
#19
Jinhui Li, Teryn N Sapper, Eunice Mah, Meredith V Moller, Joshua B Kim, Chureeporn Chitchumroonchokchai, Joshua D McDonald, Richard S Bruno
NFκB-mediated inflammation contributes to liver injury during nonalcoholic steatohepatitis (NASH). We hypothesized that antiinflammatory activities of green tea extract (GTE) during NASH would lower tumor necrosis factor receptor-1 (TNFR1)- and Toll-like receptor-4 (TLR4)-mediated NFκB activation. Male C57BL6/J mice (6 weeks old) were fed a low-fat (LF) or high-fat (HF) diet for 12 weeks to induce NASH. They were then randomized to continue on these diets supplemented with 0 or 2% GTE (n=10/group) for an additional 8 weeks prior to evaluating NASH, NFκB inflammation and TNFR1 and TLR4 receptor complexes and their respective ligands, TNFα and endotoxin...
December 21, 2016: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28036089/chemical-composition-and-antioxidant-activity-of-euterpe-oleracea-roots-and-leaflets
#20
Christel Brunschwig, Louis-Jérôme Leba, Mona Saout, Karine Martial, Didier Bereau, Jean-Charles Robinson
Euterpe oleracea (açaí) is a palm tree well known for the high antioxidant activity of its berries used as dietary supplements. Little is known about the biological activity and the composition of its vegetative organs. The objective of this study was to investigate the antioxidant activity of root and leaflet extracts of Euterpe oleracea (E. oleracea) and characterize their phytochemicals. E. oleracea roots and leaflets extracts were screened in different chemical antioxidant assays (DPPH-2,2-diphenyl-1-picrylhydrazyl, FRAP-ferric feducing antioxidant power, and ORAC-oxygen radical absorbance capacity), in a DNA nicking assay and in a cellular antioxidant activity assay...
December 29, 2016: International Journal of Molecular Sciences
keyword
keyword
39641
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"