Publications
| Title | Abstract | Year Filter | PMID(sorted descending) Filter |
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| isolation of chs gene from brunfelsia acuminata flowers and its regulation in anthocyanin biosysthesis. | chalcone synthase gene (bachs) from brunfelsia acuminata flowers was isolated using rt-pcr and race. the coding region of the gene is 1425-bp with an open reading frame of 1170-bp, 73-bp 5'utr, and 172-bp 3'utr. its deduced protein does not have a signal peptide but does contain a cond_enzyme superfamily domain, and consists of 389 amino acids with a predicted molecular mass of 42,699 da and a pi of 6.57. the deduced amino acid sequence of bachs shares 90%, 88%, 85%, 84% and 79% identity with ch ... | 2016 | 28036083 |
| acute black tea consumption improves cutaneous vascular function in healthy middle-aged humans. | dietary flavonoids, such as those present in black tea, are associated with reduced risk of cardiovascular disease (cvd), possibly through improving nitric oxide (no) mediated vascular function. the aim of this study was to examine the effect of acute black tea ingestion on cutaneous microvascular function. | 2016 | 28034564 |
| htp nutraceutical screening for histone deacetylase inhibitors and effects of hdacis on tumor-suppressing mirnas by trichostatin a and grapeseed (vitis vinifera) in hela cells. | aggressive tumor malignancies are a consequence of delayed diagnosis, epigenetic/phenotype changes and chemo-radiation resistance. histone deacetylases (hdacs) are a major epigenetic regulator of transcriptional repression, which are highly overexpressed in advanced malignancy. while original chemotherapy drugs were modeled after phytochemicals elucidated by botanical screenings, hdac inhibitors (hdaci) such as apicidin, trichostatin a (tsa) and butyrate were discovered as products of fungus and ... | 2017 | 28031235 |
| global transcriptional analysis reveals the complex relationship between tea quality, leaf senescence and the responses to cold-drought combined stress in camellia sinensis. | in field conditions, especially in arid and semi-arid areas, tea plants are often simultaneously exposed to various abiotic stresses such as cold and drought, which have profound effects on leaf senescence process and tea quality. however, most studies of gene expression in stress responses focus on a single inciting agent, and the confounding effect of multiple stresses on crop quality and leaf senescence remain unearthed. here, global transcriptome profiles of tea leaves under separately cold ... | 2016 | 28018394 |
| isolation and expression features of hexose kinase genes under various abiotic stresses in the tea plant (camellia sinensis). | hexokinases (hxks, ec 2.7.1.1) and fructokinases (frks, ec 2.7.1.4) play important roles in carbohydrate metabolism and sugar signaling during the growth and development of plants. however, the hxks and frks in the tea plant (camellia sinensis) remain largely unknown. in this manuscript, we present the molecular characterization, phylogenetic relationships, conserved domains and expression profiles of four hxk and seven frk genes of the tea plant. the 11 deduced cshxk and csfrk proteins were gro ... | 2017 | 28013175 |
| anti-proliferative and apoptosis-inducing effect of theabrownin against non-small cell lung adenocarcinoma a549 cells. | with the highest cancer incidence rate, lung cancer, especially non-small cell lung cancer (nsclc), is the leading cause of cancer death in the world. tea (leaves of camellia sinensis) has been widely used as a traditional beverage beneficial to human health, including anti-nsclc activity. theabrownin (tb) is one major kind of tea pigment responsible for the beneficial effects of tea liquor. however, its effect on nsclc is unknown. the aim of the present study was to evaluate anti-proliferative ... | 2016 | 27994550 |
| zinc stress affects ionome and metabolome in tea plants. | the research of physiological responses to zn stress in plants has been extensively studied. however, the ionomics and metabolomics responses of plants to zn stress remain largely unknown. in present study, the nutrient elements were identified involved in ion homeostasis and metabolomics changes related to zn deficiency or excess in tea plants. nutrient element analysis demonstrated that the concentrations of zn affected the ion-uptake in roots and the nutrient element transportation to leaves, ... | 2017 | 27992770 |
| effect of diabetea tea ™ consumption on inflammatory cytokines and metabolic biomarkers in type 2 diabetes patients. | diabetea tea™ (dt) is an anti-diabetic alternative medicine in some asian countries. the main constituent of dt is black tea originating from camellia sinensis that is supplemented by 12 other medicinal plants. black tea contains a large amount of the flavonoids catechins especially epigallocatechin gallate (egcg) which has anti-inflammatory and antioxidative capacity. this study was undertaken to evaluate the possible effects of dt intake on inflammatory cytokines, regulatory t cells (tregs) an ... | 2016 | 27989874 |
| effect of green tea (camellia sinensis) extract and pre-freezing equilibration time on the post-thawing quality of ram semen cryopreserved in a soybean lecithin-based extender. | the aim of this study was to determine the effect of camellia sinensis extract as antioxidant supplement and pre-freezing equilibration times in a soybean lecithin extender for freezing ram semen. in this study, a total of 20 ejaculates were collected from four ghezel rams and diluted with extenders (1.5% soybean lecithin, 7% glycerol) containing no supplements (control) and camellia sinensis extract (5, 10, and 15 mg/l) and cryopreserved, immediately after thermal equilibrium was reached at 5 ° ... | 2016 | 27983946 |
| amelioration of gamma-hexachlorocyclohexane (lindane) induced renal toxicity by camellia sinensis in wistar rats. | a study to assess the toxic effects of gamma-hexachlorocyclohexane (γ-hch) (lindane) and ameliorative effects of camellia sinensis on renal system has been carried out in male wistar rats. | 2016 | 27956790 |
| natural product htp screening for attenuation of cytokine-induced neutrophil chemo attractants (cincs) and no2- in lps/ifnγ activated glioma cells. | chronic and acute central nervous system (cns) inflammation are contributors toward neurological injury associated with head trauma, stroke, infection, parkinsons or alzheimers disease. cns inflammatory illnesses can also contribute toward risk of developing glioblastoma multiforme (gbm). with growing public interest in complementary and alternative medicines (cams), we conduct a high throughput (htp) screening of >1400 natural herbs, plants and over the counter (otc) products for anti-inflammat ... | 2017 | 27956075 |
| mechanisms of body weight reduction by black tea polyphenols. | obesity is one of the most common nutritional diseases worldwide. this disease causes health problems, such as dyslipidemia, hyperglycemia, hypertension and inflammation. there are drugs used to inhibit obesity. however, they have serious side effects outweighing their beneficial effects. black tea, commonly referred to as "fermented tea", has shown a positive effect on reducing body weight in animal models. black tea polyphenols are the major components in black tea which reduce body weight. bl ... | 2016 | 27941615 |
| functional properties of novel epigallocatechin gallate glucosides synthesized by using dextransucrase from leuconostoc mesenteroides b-1299cb4. | epigallocatechin gallate (egcg) is the most abundant catechin found in the leaves of green tea, camellia sinensis. in this study, novel epigallocatechin gallate-glucocides (egcg-gs) were synthesized by using dextransucrase from leuconostoc mesenteroides b-1299cb4. response surface methodology was adopted to optimize the conversion of egcg to egcg-gs, resulting in a 91.43% conversion rate of egcg. each egcg-g was purified using a c18 column. of nine egcg-gs identified by nuclear magnetic resonanc ... | 2016 | 27933996 |
| characteristics of nh4(+) and no3(-) fluxes in tea (camellia sinensis) roots measured by scanning ion-selective electrode technique. | as a vital beverage crop, tea has been extensively planted in tropical and subtropical regions. nitrogen (n) levels and forms are closely related to tea quality. based on different n levels and forms, we studied changes in no3(-) and nh4(+) fluxes in tea roots utilizing scanning ion-selective electrode technique. our results showed that under both single and mixed n forms, influx rates of no3(-) were much lower than those of nh4(+), suggesting a preference for nh4(+) in tea. with the increase in ... | 2016 | 27918495 |
| protective effects of green tea and its main constituents against natural and chemical toxins: a comprehensive review. | toxins are natural or chemical poisonous substances with severe side effects on health. humans are generally exposed by widespread toxic contaminations via air, soil, water, food, fruits and vegetables. determining a critical antidote agent with extensive effects on different toxins is an ultimate goal for all toxicologists. traditional medicine is currently perceived as a safe and natural approach against toxins. in this regard, we focused on the protective effects of green tea (camellia sinens ... | 2017 | 27915048 |
| inhibitory effects of l-theanine on airway inflammation in ovalbumin-induced allergic asthma. | l-theanine, a water-soluble amino acid isolated from green tea (camellia sinensis), has anti-inflammatory activity, antioxidative properties, and hepatoprotective effects. however, the anti-allergic effect of l-theanine and its underlying molecular mechanisms have not been elucidated. in this study, we investigated the protective effects of l-theanine on asthmatic responses, particularly airway inflammation and oxidative stress modulation in an ovalbumin (ova)-induced murine model of asthma. tre ... | 2017 | 27908701 |
| noni leaf and black tea enhance bone regeneration in estrogen-deficient rats. | black tea and nonileaf are among the dietary compounds that can benefit patients with bone resorption disorders. their bone regeneration effects and their mechanisms were studied in estrogen-deficient rats. | 2017 | 27908549 |
| antioxidant and antibacterial activity of the beverage obtained by fermentation of sweetened lemon balm (melissa officinalis l.) tea with symbiotic consortium of bacteria and yeasts. | kombucha is a fermented tea beverage which is traditionally prepared by fermenting sweetened black or green tea (camellia sinensis l.) with symbiotic consortium of bacteria and yeasts (scoby). in this study, lemon balm (melissa officinalis l.) was used as the only nitrogen source for kombucha fermentation. during the seven-day fermentation process, ph value, titratable acidity (ta), total phenolic content, phenolic compounds, and antioxidant activity against hydroxyl (˙oh) and 1,1-diphenyl-2-pic ... | 2014 | 27904315 |
| the antiproliferative effect of chakasaponins i and ii, floratheasaponin a, and epigallocatechin 3-o-gallate isolated from camellia sinensis on human digestive tract carcinoma cell lines. | acylated oleanane-type triterpene saponins, namely chakasaponins i (1) and ii (2), floratheasaponin a (3), and their analogs, together with catechins-including (-)-epigallocatechin 3-o-gallate (4), flavonoids, and caffeine-have been isolated as characteristic functional constituents from the extracts of "tea flower", the flower buds of camellia sinensis (theaceae), which have common components with that of the leaf part. these isolates exhibited antiproliferative activities against human digesti ... | 2016 | 27898032 |
| in vitro chemopreventive properties of green tea, rooibos and honeybush extracts in skin cells. | the chemopreventive properties of the herbal teas rooibos (aspalathus linearis) and honeybush (cyclopia spp.) have been demonstrated on mouse skin in vivo but the underlying mechanisms are not clear. the aim of the current study was to determine the anti-proliferative and pro-apoptotic activity of methanol and aqueous extracts of rooibos and two cyclopia species in different skin cells, using green tea (camellia sinensis) as a benchmark. extracts were also characterised for their major individua ... | 2016 | 27897996 |
| dye degradation by green heterogeneous fenton catalysts prepared in presence of camellia sinensis. | this work describes the synthesis and characterization of supported green iron catalysts, prepared with camellia sinensis tea extract, and their application in heterogeneous fenton degradation of pollutant dyes. the influence of the catalyst synthesis conditions in the iron and organic content were investigated by x-ray fluorescence and thermogravimetric analyses. irregular, chain-like nanoparticles, in the size range of 20-100 nm, capped by polyphenolic natural compounds, were visualized by tem ... | 2017 | 27883942 |
| transcriptome-based analysis of dof family transcription factors and their responses to abiotic stress in tea plant (camellia sinensis). | tea plant (camellia sinensis (l.) o. kuntze) is affected by abiotic stress during its growth and development. dna-binding with one finger (dof) transcription factors (tfs) play important roles in abiotic stress tolerance of plants. in this study, a total of 29 putative dof tfs were identified based on transcriptome of tea plant, and the conserved domains and common motifs of these csdof tfs were predicted and analyzed. the 29 csdof proteins were divided into 7 groups (a, b1, b2, c1, c2.1, c2.2, ... | 2016 | 27872842 |
| in vitro and in vivo anti-inflammatory effects of theaflavin-3,3'-digallate on lipopolysaccharide-induced inflammation. | inflammation is a defensive response against various harmful stimuli and stress conditions, such as tissue injury and one of the most common pathological processes occurring in human diseases. theaflavin-3,3'-digallate, one of the theaflavins present in black tea, exhibits several bioactive properties, including the ability to lower the incidence of coronary heart disease, a positive effect on the bone mineral density, and the ability to prevent cancer. the aim of this study was to evaluate whet ... | 2017 | 27871911 |
| antioxidant properties of tea blunt ros-dependent lipogenesis: beneficial effect on hepatic steatosis in a high fat-high sucrose diet nafld obese rat model. | oxidative stress could trigger lipid accumulation in liver and thus hepatic steatosis. tea is able to prevent liver disorders, but a direct link between antioxidant capacities and prevention of steatosis has not been reported yet. we aimed to investigate such relationship in a rat model of high fat-high sucrose diet (hfs)-induced obesity and to explore more deeply the mechanisms in isolated hepatocytes. wistar rats were divided into a control group (standard diet), an hfs group (high fat-sucrose ... | 2017 | 27866076 |
| absolute quantification of micrornas in green tea (camellia sinensis) by stem-loop quantitative real-time pcr. | there are some studies to show that food-derived plant micrornas (mirnas) may be detected in mammals. the research evidence has provoked a considerable debate whether plant-derived mirnas exert the same regulatory functions as endogenous animal mirnas. to test the hypothesis, methods of highly sensitive absolute quantification mirnas have been developed. however, absolute mirna quantification of green tea has not yet been reported. this study is the first to build an absolute quantification meth ... | 2016 | 27861949 |
| variation of theanine, phenolic, and methylxanthine compounds in 21 cultivars of camellia sinensis harvested in different seasons. | this is the first study to use chemometric methods to differentiate among 21 cultivars of camellia sinensis from china and between leaves harvested at different times of the year using 30 compounds implicated in the taste and quality of tea. unique patterns of catechin derivatives were observed among cultivars and across harvest seasons. c. sinensis var. pubilimba (you 510) differed from the cultivars of c. sinensis var. sinensis, with higher levels of theobromine, (+)-catechin, gallocatechin, g ... | 2017 | 27855934 |
| dispersive liquid-liquid microextraction based on solidification of floating organic drop for preconcentration and determination of trace amounts of copper by flame atomic absorption spectrometry. | a novel, simple, rapid, sensitive, inexpensive and environmentally friendly dispersive liquid-liquid microextraction method based on the solidification of a floating organic drop (dllme-sfo) was developed for the determination of copper by flame atomic absorption spectrometry (faas). n-o-vanillidine-2-amino-p-cresol was used as a chelating ligand and 1-undecanol was selected as an extraction solvent. the main parameters affecting the performance of dllme-sfo, such as sample ph, volume of extract ... | 2017 | 27855895 |
| transcriptome-wide identification and expression analysis of the nac gene family in tea plant [camellia sinensis (l.) o. kuntze]. | in plants, the nac (nam-ataf1/2-cuc) family of proteins constitutes several transcription factors and plays vital roles in diverse biological processes, such as growth, development, and adaption to adverse factors. tea, as a non-alcoholic drink, is known for its bioactive ingredients and health efficacy. currently, knowledge about nac gene family in tea plant remains very limited. in this study, a total of 45 csnac genes encoding nac proteins including three membrane-bound members were identifie ... | 2016 | 27855193 |
| black tea increases circulating endothelial progenitor cells and improves flow mediated dilatation counteracting deleterious effects from a fat load in hypertensive patients: a randomized controlled study. | (1) background: endothelial dysfunction predicts cardiovascular events. circulating angiogenic cells (cacs) maintain and repair the endothelium regulating its function. tea flavonoids reduce cardiovascular risk. we investigated the effects of black tea on the number of cacs and on flow-mediated dilation (fmd) before and after an oral fat in hypertensives; (2) methods: in a randomized, double-blind, controlled, cross-over study, 19 patients were assigned to black tea (150 mg polyphenols) or a pla ... | 2016 | 27854314 |
| comparative transcriptome analysis of chinary, assamica and cambod tea (camellia sinensis) types during development and seasonal variation using rna-seq technology. | tea quality and yield is influenced by various factors including developmental tissue, seasonal variation and cultivar type. here, the molecular basis of these factors was investigated in three tea cultivars namely, him sphurti (h), tv23 (t), and upasi-9 (u) using rna-seq. seasonal variation in these cultivars was studied during active (a), mid-dormant (md), dormant (d) and mid-active (ma) stages in two developmental tissues viz. young and old leaf. development appears to affect gene expression ... | 2016 | 27853259 |
| natural product htp screening for antibacterial (e.coli 0157:h7) and anti-inflammatory agents in (lps from e. coli o111:b4) activated macrophages and microglial cells; focus on sepsis. | acute systemic inflammatory response syndrome arising from infection can lead to multiple organ failure and death, with greater susceptibility occurring in immunocompromised individuals. moreover, sub-acute chronic inflammation is a contributor to the pathology of diverse degenerative diseases (parkinson's disease, alzheimer's disease and arthritis). given the known limitations in western medicine to treat a broad range of inflammatory related illness as well as the emergence of antibiotic resis ... | 2016 | 27846826 |
| cytochrome p450 2a6 phenotyping using dietary caffeine salivary metabolite ratios and genotyping using blood on storage cards in non-smoking japanese volunteers. | a simple method of genotyping and phenotyping cytochrome p450 2a6 (cyp2a6) was previously reported using individual blood samples and urinary caffeine metabolite ratios of 1,7-dimethyluric acid (17u) to 1-methylxanthine (1x). | 2016 | 27842485 |
| theaflavin-3,3'-digallate represses osteoclastogenesis and prevents wear debris-induced osteolysis via suppression of erk pathway. | peri-implant osteolysis (pio) and the following aseptic loosening is the leading cause of implant failure. emerging evidence suggests that receptor activator of nuclear factor kappa-b ligand (rankl)-induced osteoclast formation and osteoclastic bone resorption are responsible for particle-stimulated pio. here, we explored the effect of theaflavin-3,3'-digallate (tf3) on titanium particle-induced osteolysis in vivo and in vitro. twenty-eight male c57bl/6 mice were randomly separated into four gro ... | 2017 | 27838465 |
| design, development, and characterization of lipid nanocarriers-based epigallocatechin gallate delivery system for preventive and therapeutic supplementation. | green tea is manufactured from the leaves of camellia sinensis and has been shown to possess, among other properties, anticancer, antiobesity, antiatherosclerotic, antidiabetic, antibacterial, and antiviral effects. the beneficial effects of green tea are related to the activities of (-)-epigallocatechin gallate (egcg). this catechin is very unstable, undergoing degradation and epimerization, which is responsible for the loss of its health benefits. encapsulation in nanoparticles (nps) is an eff ... | 2016 | 27826184 |
| the modulatory effect of infusions of green tea, oolong tea, and black tea on gut microbiota in high-fat-induced obese mice. | tea consumption has been identified to have an anti-obesity effect. whether it is associated with gut microbiota modulation is investigated in this study. phenolic profiles of infusions of green tea, oolong tea and black tea were comprehensively compared first, by utilizing ultra-performance liquid chromatography-electrospray ionization-quadrupole time-of-flight mass spectrometry (uplc-esi-q-tofms). subsequently, high-fat-diet induced obese c57bl/6j mice were orally administered these three type ... | 2016 | 27812583 |
| tea, coffee, and caffeinated beverage consumption and risk of epithelial ovarian cancers. | the risk for epithelial ovarian cancer associated with the consumption of caffeinated beverages (tea, coffee, and soft drinks) and green tea is inconclusive. however, few studies have investigated the type of caffeinated beverage or the type of tea. | 2016 | 27810483 |
| tea polysaccharides and their bioactivities. | tea (camellia sinensis) is a beverage beneficial to health and is also a source for extracting bioactive components such as theanine, tea polyphenols (tpp) and tea polysaccharides (tps). tps is a group of heteropolysaccharides bound with proteins. there is evidence showing that tps not only improves immunity but also has various bioactivities, such as antioxidant, antitumor, antihyperglycemia, and anti-inflammation. however, inconsistent results concerning chemical composition and bioactivity of ... | 2016 | 27809221 |
| expression profile analysis of ascorbic acid-related genes in response to temperature stress in the tea plant, camellia sinensis (l.) o. kuntze. | ascorbic acid (asa), also known as ascorbate or vitamin c, is a natural organic compound in green plants that has antioxidant properties, and is an essential nutrient for humans. the tea plant, camellia sinensis (l.) o. kuntze, is an important global economic crop. here, the expression profiles of genes related to asa biosynthesis and recycling were analyzed in tea plants in response to temperature stress. eighteen genes involved in asa biosynthesis and recycling pathways were identified based o ... | 2016 | 27808374 |
| inhibition of murine norovirus and feline calicivirus by edible herbal extracts. | human noroviruses (hunovs) cause foodborne and waterborne viral gastroenteritis worldwide. because hunov culture systems have not been developed thus far, no available medicines or vaccines preventing infection with hunovs exist. some herbal extracts were considered as phytomedicines because of their bioactive components. in this study, the inhibitory effects of 29 edible herbal extracts against the norovirus surrogates murine norovirus (mnv) and feline calicivirus (fcv) were examined. fcv was s ... | 2017 | 27807684 |
| arginine kinase in toxocara canis: exon-intron organization, functional analysis of site-directed mutants and evaluation of putative enzyme inhibitors. | to determine exon/intron organization of the toxocara canis (t. canis) ak (tcak) and to test green and black tea and several other chemicals against the activity of recombinant tcak in the guanidino-specific region by site-directed mutants. | 2016 | 27794395 |
| diverse colletotrichum species cause anthracnose of tea plants (camellia sinensis (l.) o. kuntze) in china. | anthracnose caused by colletotrichum is one of the most severe diseases that can afflict camellia sinensis. however, research on the diversity and geographical distribution of colletotrichum in china remain limited. in this study, 106 colletotrichum isolates were collected from diseased leaves of ca. sinensis cultivated in the 15 main tea production provinces in china. multi-locus phylogenetic analysis coupled with morphological identification showed that the collected isolates belonged to 11 sp ... | 2016 | 27782129 |
| green tea catechin inhibits the activity and neutrophil release of matrix metalloproteinase-9. | green tea (camellia sinensis; lǜ chá) extracts have been shown to possess anti-oxidant and anti-inflammatory effects in various cell types. green tea extract (gtx) has been shown to significantly inhibit the activity of collagenase-3 (matrix metalloproteinase-13 (mmp-13)) in vitro. mmps, such as mmp-9, are known to be involved in many inflammatory diseases including periodontal disease. gtx and a major catechin, epigallocatechin-gallate (egcg), were examined for their ability to inhibit purified ... | 2016 | 27774417 |
| interactions between α-amylase and an acidic branched polysaccharide from green tea. | to understand the mechanism responsible for the α-amylase inhibitory activity of tea polysaccharides, the interaction between α-amylase and an acidic branched tea polysaccharide (tpsa) was investigated using fluorescence spectroscopy and resonance light scattering analysis. tpsa, exhibiting inhibitory activity towards α-amylase (the maximum inhibition percentage of 65%), was isolated from green tea (camellia sinensis) and characterized by nuclear magnetic resonance spectroscopy, fourier transfor ... | 2017 | 27756641 |
| gene expression profile indicates involvement of no in camellia sinensis pollen tube growth at low temperature. | nitric oxide (no) functions as a critical signaling molecule in the low-temperature stress responses in plants, including polarized pollen tube growth in camellia sinensis. despite this, the potential mechanisms underlying the participation of no in pollen tube responses to low temperature remain unclear. here, we investigate alterations to gene expression in c. sinensis pollen tubes exposed to low-temperature stress and no using rna-seq technology, in order to find the potential candidate genes ... | 2016 | 27756219 |
| effect of oral theaflavin administration on body weight, fat, and muscle in healthy subjects: a randomized pilot study. | theaflavins are reddish-colored polyphenols in black tea. to test the efficacy of theaflavin administration on body fat and muscle, we performed a randomized, double-blind, placebo-controlled study and investigated the effect of theaflavins administration on the body composition using of healthy subjects. in this study, 30 male and female japanese were enrolled and participants were randomly allocated to receive placebo, theaflavin (50 or 100 mg/day), or catechin (400 mg/ml) for 10 weeks. the ef ... | 2017 | 27756182 |
| nasal carriage of methicillin-resistant staphylococcus aureus and the effect of tea extracts on isolates. | this study aimed to determine the occurrence of methicillin-resistant staphylococcus aureus (mrsa) nasal carriage among patients, healthcare workers (hcws), and community individuals, as well as to test the effect of tea extracts on detected s. aureus isolates. | 2016 | 27749645 |
| antioxidants from black and green tea: from dietary modulation of oxidative stress to pharmacological mechanisms. | the consumption of tea (camellia sinensis) has been correlated with a low incidence of chronic pathologies, such as cardiovascular disease and cancer, in which oxidative stress plays a critical role. tea catechins and theaflavins are, respectively, the bioactive phytochemicals responsible for the antioxidant activity of green tea (gt) and black tea (bt). in addition to their redox properties, tea catechins and theaflavins could have also pharmacological activities, such as the ability to lower g ... | 2016 | 27747873 |
| the consumption of coffee and black tea and the risk of lung cancer. | coffee and black tea are among the most consumed beverages worldwide. although their potential role in lung cancer occurrence has been investigated in several studies, results have been inconclusive. we investigated the associations between intake of coffee and black tea with lung cancer in a population-based case-control study in montreal, canada. | 2016 | 27743642 |
| concomitant ingestion of lactic acid bacteria and black tea synergistically enhances flavonoid bioavailability and attenuates d-galactose-induced oxidative stress in mice via modulating glutathione antioxidant system. | black tea (bt) has been positively linked to improved redox status, while its efficacy is limited due to the low bioavailability of bt flavonoids. in addition to the direct antioxidant activity, flavonoids regulate redox balance via inducing endogenous antioxidants, particularly glutathione (gsh) and gsh-dependent antioxidant enzymes. this work first examined the effect of lactic acid bacteria (lab) and bt alone or in combination on flavonoid bioavailability and metabolism; next, the effect of l ... | 2016 | 27736731 |
| analysis of the influence of food colorings in esthetic orthodontic elastomeric ligatures. | the purpose of this study was to evaluate in vitro the color changes of esthetic orthodontic elastomeric ligatures of different shades when exposed to four food colorings commonly found in the diet of patients. | 2016 | 27733878 |
| color stability of composites after short-term oral simulation: an in vitro study. | although most of the studies investigated color stability of different restorative materials, evaluation of color stability of composites after immersion in multiple beverages in the same day by an in vitro oral simulation study is unclear. | 2016 | 27733871 |
| peroxidase can perform the hydroxylation step in the 'oxidative cascade' during oxidation of tea catechins. | formation of black tea thearubigins involves at least two of the following oxidation steps: (i) oligomerization, (ii) rearrangement, (iii) hydroxylation. the first two are mainly catalysed by polyphenol oxidase(ppo), whereas the enzyme responsible for hydroxylation has not yet been identified. two main oxidative activities, peroxidase(pod) and ppo, occur in tea leaves. pod was hypothesized to be responsible for hydroxylation. model systems with horseradish pod and mushroom tyrosinase were used i ... | 2016 | 27723327 |
| influence of enamel thickness on bleaching efficacy: an in-depth color analysis. | this study evaluated the influence of different enamel thicknesses and bleaching agents on treatment efficacy in-depth by spectrophotometry color analysis. eighty bovine dental fragments were previously stained in black tea solution and randomly assigned into eight groups (n=10), 1.75mm dentin thickness and different enamel thicknesses as follows: 0.5mm, 1.0mm planned, 1.0mm unplanned (aprismatic enamel), and absence of enamel. the 10% carbamide peroxide (cp) and 35% hydrogen peroxide (hp) bleac ... | 2016 | 27708725 |
| inhibition of pancreatic lipase and amylase by extracts of different spices and plants. | the aim of this study is to search new anti-obesity and anti-diabetic agents from plant and spices crude extracts as alternative to synthetic drugs. the inhibitory effect of 72 extracts was evaluated, in vitro, on lipase and amylase activities. aqueous extracts of cinnamon and black tea exhibited an appreciable inhibitory effect on pancreatic amylase with ic50 values of 18 and 87 μg, respectively. aqueous extracts of cinnamon and mint showed strong inhibitory effects against pancreatic lipase wi ... | 2017 | 27706951 |
| anti-inflammatory effects of aspalathus linearis and cyclopia spp. extracts in a uvb/keratinocyte (hacat) model utilising interleukin-1α accumulation as biomarker. | ultraviolet b (uvb) radiation is one of the major predisposing risk factors of skin cancer. the anticancer and photoprotective effects of unoxidized rooibos (aspalathus linearis) and honeybush (cyclopia) herbal teas, containing high levels of dihydrochalones and xanthones, respectively, have been demonstrated in skin cancer models in vivo. in the current study, the anti-inflammatory effects of methanol and aqueous extracts of these herbal teas were investigated in a uvb/hacat keratinocyte model ... | 2016 | 27706097 |
| simultaneous determination of black tea-derived catechins and theaflavins in tissues of tea consuming animals using ultra-performance liquid-chromatography tandem mass spectrometry. | the bioavailability, tissue distribution and metabolic fate of the major tea polyphenols, catechins and theaflavins as well as their gallated derivatives are yet to be precisely elucidated on a single identification platform for assessment of their relative bioefficacy in vivo. this is primarily due to the lack of suitable analytical tools for their simultaneous determination especially in an in vivo setting, which continues to constrain the evaluation of their relative health beneficiary potent ... | 2016 | 27695123 |
| tea polyphenols inhibit the activation of nf-κb and the secretion of cytokines and matrix metalloproteinases by macrophages stimulated with fusobacterium nucleatum. | fusobacterium nucleatum has been associated with both periodontal disease and inflammatory bowel disease. this gram-negative bacterium possesses a high inflammatory potential that may contribute to the disease process. we hypothesized that green and black tea polyphenols attenuate the inflammatory response of monocytes/macrophages mediated by f. nucleatum. we first showed that the tea extracts, egcg and theaflavins reduce the nf-κb activation induced by f. nucleatum in monocytes. since nf-κb is ... | 2016 | 27694921 |
| neuroprotective effects of theaflavins against oxidative stress-induced apoptosis in pc12 cells. | oxidative stress can induce neuronal apoptosis via the production of superoxide and hydroxyl radicals. this process is as a major pathogenic mechanism in neurodegenerative disorders. in this study, we aimed to clarify whether theaflavins protect pc12 cells from oxidative stress damage induced by h2o2. a cell model of pc12 cells undergoing oxidative stress was created by exposing cells to 200 μm h2o2 in the presence or absence of varying concentrations of theaflavins (5, 10, and 20 μm). cell viab ... | 2016 | 27686660 |
| in vitro α-glucosidase inhibitory activity of isolated fractions from water extract of qingzhuan dark tea. | natural products have being used as potential inhibitors against carbohydrate-hydrolyzing enzymes to treat diabetes mellitus. chinese dark tea has various interesting bioactivities. in this study, the active compounds from qingzhuan dark tea were separated and their anti-diabetic activity was examined using an in vitro enzymatic model. | 2016 | 27681250 |
| the potential role of polyphenols in the modulation of skin cell viability by aspalathus linearis and cyclopia spp. herbal tea extracts in vitro. | the relationship between polyphenol constituents, antioxidant properties of aqueous and methanol extracts of green tea (camellia sinensis), the herbal teas, rooibos (aspalathus linearis) and honeybush (cyclopia spp.), against skin cell viability was investigated in vitro. | 2016 | 27671741 |
| global analysis of type three secretion system and quorum sensing inhibition of pseudomonas savastanoi by polyphenols extracts from vegetable residues. | protection of plants against bacterial diseases still mainly relies on the use of chemical pesticides, which in europe correspond essentially to copper-based compounds. however, recently plant diseases control is oriented towards a rational use of molecules and extracts, generally with natural origin, with lower intrinsic toxicity and a reduced negative environmental impact. in this work, polyphenolic extracts from vegetable no food/feed residues of typical mediterranean crops, as olea europaea, ... | 2016 | 27668874 |
| green synthesis of palladium nanoparticles mediated by black tea leaves (camellia sinensis) extract: catalytic activity in the reduction of 4-nitrophenol and suzuki-miyaura coupling reaction under ligand-free conditions. | the present study was conducted to synthesize palladium nanoparticles (pd nps) through a facile and green route using non-toxic and renewable natural black tea leaves (camellia sinensis) extract, as the reducing and stabilizing agent. the as-prepared pd@b.tea nps catalyst was characterized by uv-vis spectroscopy, x-ray diffraction (xrd), fourier transformed infrared spectroscopy (ft-ir), field emission scanning electron microscopy (fe-sem), transmission electron microscopy (tem) and energy dispe ... | 2017 | 27665075 |
| colour stabilities of three types of orthodontic clear aligners exposed to staining agents. | the aim of this study was to evaluate and compare the colour stabilities of three types of orthodontic clear aligners exposed to staining agents in vitro. sixty clear orthodontic aligners produced by three manufacturers (invisalign, angelalign, and smartee) were immersed in three staining solutions (coffee, black tea, and red wine) and one control solution (distilled water). after 12-h and 7-day immersions, the aligners were washed in an ultrasonic cleaner and measured with a colourimeter. the c ... | 2016 | 27660048 |
| potential of camellia sinensis proanthocyanidins-rich fraction for controlling malaria mosquito populations through disruption of larval development. | anopheles arabiensis and a. gambiae (sensu stricto) are the most prolific afrotropical malaria vectors. population control efforts of these two vectors have been hampered by extremely diverse larval breeding sites and widespread resistance to currently available insecticides. control of mosquito larval stages using bioactive compounds of plant origin has the potential to suppress vector populations leading to concomitant reduction in disease transmission rates. in this study, we evaluated the ef ... | 2016 | 27660043 |
| effect of dental pigmentation intensity on the transenamel and transdentinal penetration of hydrogen peroxide. | abastract this study aimed to evaluate the transenamel and transdentinal penetration of hydrogen peroxide (h202) applied to bovine teeth pigmented with black tea at different intensities. the following groups were formed dw: immersion in distilled water; bt100: immersion in an infusion of 1.6 g of black tea per 100 ml distilled water; bt10: immersion in an infusion of 1.6 g black tea per 10 ml distilled water. all groups were immersed for 6 days. to quantify the penetration of h202, the specimen ... | 2017 | 27652700 |
| antibacterial activity of polyphenolic fraction of kombucha against enteric bacterial pathogens. | the emergence of multi-drug-resistant enteric pathogens has prompted the scientist community to explore the therapeutic potentials of traditional foods and beverages. the present study was undertaken to investigate the efficacy of kombucha, a fermented beverage of sugared black tea, against enterotoxigenic escherichia coli, vibrio cholerae, shigella flexneri and salmonella typhimurium followed by the identification of the antibacterial components present in kombucha. the antibacterial activity w ... | 2016 | 27638313 |
| evaluation of macro- and microelement levels in black tea in view of its geographical origin. | the aim of this study was to evaluate the elemental composition of black tea samples and their infusions in view of their geographical origin. in total, 14 elements were analyzed, 13 (ca, k, mg, na, mn, fe, zn, cu, cr, ni, co, cd, and pb) by flame atomic absorption spectrometry, and p by uv-vis spectrometry, after mineralization of samples. it was found that k was the most abundant macroelement in the analyzed samples, whereas among microelements, the highest concentration was found for mn. base ... | 2017 | 27637916 |
| white tea intake prevents prediabetes-induced metabolic dysfunctions in testis and epididymis preserving sperm quality. | prediabetes has been associated with alterations in male reproductive tract, especially in testis and epididymis. moreover, in vitro studies described a promising action of tea (camellia sinensis l.) against metabolic dysfunctions. herein, we hypothesized that white tea (wtea) ingestion by prediabetic animals could ameliorate the metabolic alterations induced by the disease in testicular and epididymal tissues, preserving sperm quality. wtea infusion was prepared and its phytochemical profile wa ... | 2016 | 27637002 |
| layer-by-layer thin film of iron phthalocyanine as a simple and fast sensor for polyphenol determination in tea samples. | polyphenols have attracted attention due to their antioxidant capacity and beneficial effects to health. therefore, fast, inexpensive, and efficient methods to discriminate and to quantify polyphenols are of interest for food industry. in this paper, layer-by-layer films of poly(allylamine hydrochloride) and iron tetrasulfonated phthalocyanine were employed as sensor for determination of polyphenols in green tea (camellia sinensis), and green and roasted mate teas (ilex paraguariensis). the poly ... | 2016 | 27636549 |
| analysis of theanine in tea (camellia sinensis) dietary ingredients and supplements by high-performance liquid chromatography with postcolumn derivatization: single-laboratory validation, first action 2016.10. | an hplc method with postcolumn derivatization was developed and validated for the determination of theanine content in tea dietary ingredients and supplements. a variety of common commercially available supplement forms such as powders, liquid tinctures, tablets, softgels, and gelcaps, as well as three national institute of standards and technology camellia sinensis standard reference materials were investigated in the study. a simple extraction procedure using citrate buffer at ph 2.2 allowed f ... | 2016 | 27633949 |
| phenotypic, histological and proteomic analyses reveal multiple differences associated with chloroplast development in yellow and variegated variants from camellia sinensis. | leaf colour variation is observed in several plants. we obtained two types of branches with yellow and variegated leaves from camellia sinensis. to reveal the mechanisms that underlie the leaf colour variations, combined morphological, histological, ionomic and proteomic analyses were performed using leaves from abnormal branches (variants) and normal branches (cks). the measurement of the cie-lab coordinates showed that the brightness and yellowness of the variants were more intense than the ck ... | 2016 | 27633059 |
| brassinosteroids improve quality of summer tea (camellia sinensis l.) by balancing biosynthesis of polyphenols and amino acids. | summer grown green tea is less popular due to bitterness and high astringency, which are attributed to high levels of tea polyphenols (tp) and low levels of amino acids (aa) in tea leaves (camellia sinensis l.). brassinosteroids (brs), a group of steroidal plant hormones can regulate primary and secondary metabolism in a range of plant species under both normal and stress conditions. however, specific effects of brs on the photosynthesis of tea plants and the quality of summer green tea are larg ... | 2016 | 27625668 |
| insights into the genetic relationships and breeding patterns of the african tea germplasm based on nssr markers and cpdna sequences. | africa is one of the key centers of global tea production. understanding the genetic diversity and relationships of cultivars of african tea is important for future targeted breeding efforts for new crop cultivars, specialty tea processing, and to guide germplasm conservation efforts. despite the economic importance of tea in africa, no research work has been done so far on its genetic diversity at a continental scale. twenty-three nssrs and three plastid dna regions were used to investigate the ... | 2016 | 27625655 |
| distribution of tannin-'tolerant yeasts isolated from miang, a traditional fermented tea leaf (camellia sinensis var. assamica) in northern thailand. | miang is a fermented food product prepared from the tea leaves of camellia sinensis var. assamica, and is traditionally produced in mountainous areas of northern thailand. although miang has a long history and reveals deep-rooted cultural involvement with local people in northern thailand, little is known regarding its microbial diversity. yeasts were isolated from 47 miang samples collected from 28 sampling sites, including eight provinces in upper northern thailand. a hundred and seven yeast i ... | 2016 | 27614423 |
| a literature review of flavonoids and lifespan in model organisms. | epidemiological data on consumption of flavonoid-containing food points to the notion that some of these secondary plant metabolites may favour healthy ageing. the aim of the present paper was to review the literature on lifespan extension by flavonoids in worms, flies and mice. in most studies, worms and flies experienced lifespan extension when supplemented with flavonoids either as extracts or single compounds. studies with mutant worms and flies give hints as to which gene products may be re ... | 2016 | 27609098 |
| biochemical and transcriptomic analyses reveal different metabolite biosynthesis profiles among three color and developmental stages in 'anji baicha' (camellia sinensis). | the new shoots of the albino tea cultivar 'anji baicha' are yellow or white at low temperatures and turn green as the environmental temperatures increase during the early spring. 'anji baicha' metabolite profiles exhibit considerable variability over three color and developmental stages, especially regarding the carotenoid, chlorophyll, and theanine concentrations. previous studies focused on physiological characteristics, gene expression differences, and variations in metabolite abundances in a ... | 2016 | 27609021 |
| mechanism of fenpropathrin resistance in red spider mite, oligonychus coffeae (acarina: tetranychidae), infesting tea [camellia sinensis l. (o. kuntze)]. | red spider mite (rsm), oligonychus coffeae (nietner) (acarina: tetranychidae), has gained special attention in view of their widespread occurrence as a pest on tea [camellia sinensis l. (o. kuntze)]. the development of acaricide (fenpropathrin) resistance has been screened in field populations (fps) of rsms from different tea-growing regions of south india and compared with a laboratory-susceptible population (sp) based on toxicity bioassay, detoxifying enzyme activities, analysis of acetylcholi ... | 2017 | 27604837 |
| inhibition of pancreatic lipase by black tea theaflavins: comparative enzymology and in silico modeling studies. | few studies have examined the effect of black tea (camellia sinensis) theaflavins on obesity-related targets. pancreatic lipase (pl) plays a central role in fat metabolism and is a validated target for weight loss. we compared the inhibitory efficacy of individual theaflavins and explored the underlying mechanism. theaflavin-3,3'-digallate (tfdig), theaflavin-3'-gallate, theaflavin-3-gallate, and theaflavin inhibited pl with ic50 of 1.9, 4.2, 3.0, and >10μmol/l. the presence and location of the ... | 2017 | 27596423 |
| a comparative analysis of chemical compositions in camellia sinensis var. puanensis kurihara, a novel chinese tea, by hplc and uflc-q-tof-ms/ms. | camellia sinensis var. puanensis kurihara (puan tea) is a kind of ancient tea plant newly found in jiangxipo and the surrounding areas of puan county (guizhou, china). people there always believe that drinking puan tea is beneficial to the promotion of health and prevention of diseases. however, detailed information on its compositions has not been reported. therefore, in this study, the varieties and contents of purine alkaloids and polyphenols in puan tea were identified and determined by hplc ... | 2017 | 27596421 |
| soil fluoride fractions and their bioavailability to tea plants (camellia sinensis l.). | drinking teas containing high fluoride (f) imposes fluorosis risk. the soil f bioavailability is an important factor influencing its uptake and contents in teas. the present work was conducted to investigate f fractions in soil and their bioavailability to tea plants. tea seedlings were cultivated on 6 typical soils treated with a mixture consisting of dolomite, lime, peat and kcl at variable rates in the pot experiment. soils and young shoots were collected in pairs from 63 sites of 21 plantati ... | 2016 | 27591762 |
| multivariate data reduction and discrimination of black and green teas due to the physical fractionation pattern of selected metals determined in their infusions. | an analytical scheme for the physical fractionation of al, ba, ca, cr, cu, fe, k, mg, mn, na, ni, sr and zn in black and green teas infusions was proposed. it was based on the ultrafiltration/centrifugation through five membranes having molecular weight cut-offs of 100, 50, 30, 10 and 5kda. the concentrations of the studied metals in the highest and the lowest molecular weight fractions were found to classify and discriminate the analyzed teas infusions much better than the total metals concentr ... | 2016 | 27591619 |
| simultaneous determination of eight catechins and four theaflavins in green, black and oolong tea using new hplc-ms-ms method. | a simple, rapid and accurate analytical method was developed for the analysis of eight tea catechins and four theaflavins simultaneously in three types of tea (green, black and oolong tea), using ultra high performance liquid chromatography coupled with triple-quadrupole tandem mass spectrometry (hplc-ms-ms) in multiple-reaction monitoring (mrm) mode. this method using hplc-ms-ms in positive mode was performed on a capcell pak c18 mgiii (2.0mm×100mm, 3μm) column (shiseido) with the mobile phase ... | 2016 | 27589031 |
| camellia sinensis supplemented diet enhances the innate non-specific responses, haematological parameters and growth performance in mugil cephalus against photobacterium damselae. | this study evaluated the effect of dietary supplementation of camellia sinensis leaf-extract on non-specific immune responses and disease resistance of mugil cephalus fingerling against p. damselae. fish were fed with 0 (unsupplemented), 50, 100 and 200 mg/kg of green tea extract (gte) supplemented diets. results indicated that gte decreased mortality in m. cephalus in a dose-dependent manner after challenge with p. damselae. haematological parameters containing rbc, hct, hb and wbc and growth p ... | 2016 | 27582289 |
| purple foliage coloration in tea (camellia sinensis l.) arises from activation of the r2r3-myb transcription factor csan1. | purple foliage always appears in camellia sinensis families; however, the transcriptional regulation of anthocyanin biosynthesis is unknown. the tea bud sport cultivar 'zijuan' confers an abnormal pattern of anthocyanin accumulation, resulting in a mutant phenotype that has a striking purple color in young foliage and in the stem. in this study, we aimed to unravel the underlying molecular mechanism of anthocyanin biosynthetic regulation in c. sinensis. our results revealed that activation of th ... | 2016 | 27581206 |
| spectroscopic fingerprint of tea varieties by surface enhanced raman spectroscopy. | the fingerprinting method is generally performed to determine specific molecules or the behavior of specific molecular bonds in the desired sample content. a novel, robust and simple method based on surface enhanced raman spectroscopy (sers) was developed to obtain the full spectrum of tea varieties for detection of the purity of the samples based on the type of processing and cultivation. for this purpose, the fingerprint of seven different varieties of tea samples (herbal tea (rose hip, chamom ... | 2016 | 27570296 |
| the odorant (r)-citronellal attenuates caffeine bitterness by inhibiting the bitter receptors tas2r43 and tas2r46. | sensory studies showed the volatile fraction of lemon grass and its main constituent, the odor-active citronellal, to significantly decrease the perceived bitterness of a black tea infusion as well as caffeine solutions. seven citronellal-related derivatives were synthesized and shown to inhibit the perceived bitterness of caffeine in a structure-dependent manner. the aldehyde function at carbon 1, the (r)-configuration of the methyl-branched carbon 3, and a hydrophobic carbon chain were found t ... | 2016 | 27569025 |
| quality evaluation of green tea leaf cultured under artificial light condition using gas chromatography/mass spectrometry. | for an experimental model to elucidate the relationship between light quality during plant culture conditions and plant quality of crops or vegetables, we cultured tea plants (camellia sinensis) and analyzed their leaves as tea material. first, metabolic profiling of teas from a tea contest in japan was performed with gas chromatography/mass spectrometry (gc/ms), and then a ranking predictive model was made which predicted tea rankings from their metabolite profile. additionally, the importance ... | 2017 | 27568369 |
| anti-adenovirus activity, antioxidant potential, and phenolic content of black tea (camellia sinensis kuntze) extract. | backgroundadenovirus (adv) causes a number of diseases in human, and to date, no specific antiviral therapy is approved against this virus. thus, searching for effective anti-adv agents seems to be an urgent requirement. many studies have shown that components derived from medicinal plants have antiviral activity. therefore, the present study was aimed to evaluate in vitro anti-adv activity and also antioxidant potential and total phenolic compounds of black tea (camellia sinensis) crude extract ... | 2016 | 27567600 |
| elucidation of differential accumulation of 1-phenylethanol in flowers and leaves of tea (camellia sinensis) plants. | 1-phenylethanol (1pe) is a major aromatic volatile in tea (camellia sinensis) flowers, whereas it occurs in a much smaller amounts in leaves. enzymes involved in the formation of 1pe in plants and the reason why 1pe differentially accumulates in plants is unknown. in the present study, enzymes in the last step leading from acetophenone to 1pe were isolated from tea flowers by traditional biochemical chromatography. the two types of partially purified enzymes were proposed to be responsible for f ... | 2016 | 27563859 |
| extraction efficiency of different solvents and lc-uv determination of biogenic amines in tea leaves and infusions. | biogenic amines (bas), that is, spermine, spermidine, putrescine, histamine, tyramine, β-phenylethylamine, cadaverine, and serotonin, have been determined in several samples of tea leaves, tea infusions, and tea drinks by lc-uv method after derivatization with dansyl chloride. different extraction solvents have been tested and tca 5% showed better analytical performances in terms of linearity, recovery percentages, lod, loq, and repeatability than hcl 0.1 m and hclo4 0.1 m and was finally exploi ... | 2016 | 27555979 |
| isolation and dynamic expression of four genes involving in shikimic acid pathway in camellia sinensis 'baicha 1' during periodic albinism. | flavonoids are the main flavor components and functional ingredients in tea, and the shikimic acid pathway is considered as one of the most important pathways in flavonoid biosynthesis, but little was known about the function of regulatory genes in the metabolism phenolic compounds in tea plant (camellia sinensis), especially related genes in shikimic acid pathway. the dynamic changes of catechin (predominant flavonoid) contents were analyzed in this study, and four genes (csppt, csdahps, cssdh ... | 2016 | 27553670 |
| black tea theaflavins attenuate porphyromonas gingivalis virulence properties, modulate gingival keratinocyte tight junction integrity and exert anti-inflammatory activity. | over the last 10 years, bioactive plant food compounds have received considerable attention in regard to their beneficial effects against periodontal disease. in this study, we investigated the effects of black tea theaflavins (tfs) on the virulence properties of porphyromonas gingivalis and gingival keratinocyte tight junction integrity. in addition, the effects of black tea tfs on the nuclear factor-κb (nf-κb) signaling pathway and proinflammatory cytokine/matrix metalloproteinase (mmp) secret ... | 2016 | 27549582 |
| impact of polyphenol-rich sources on acute postprandial glycaemia: a systematic review. | increasingly, evidence suggests a role for polyphenols in blood glucose control. the objective of this systematic review was to evaluate the effect of polyphenol-rich sources in combination with carbohydrate sources on resulting postprandial glycaemic and insulin responses. a literature search was conducted using medline, cinhal and web of science databases. selected studies included randomised controlled trials in which the association of polyphenol-containing food or beverage consumption with ... | 2016 | 27547387 |
| transition rates of selected metals determined in various types of teas (camellia sinensis l. kuntze) and herbal/fruit infusions. | teas and raw materials used as ingredients of herbal and fruit infusions (hfi) were analysed by means of icp-ms for their content of aluminium, arsenic, cadmium, copper, lead and mercury in the dry product and in the infusion. samples of tea (camellia sinensis l. kuntze) were selected to include different origins, types (black, green), leaf grades (whole leaf, broken, fannings, dust) and manufacturing techniques (orthodox, "crush, tear, curl"). the selected hfi raw materials (chamomile, elderber ... | 2017 | 27542446 |
| metabolic changes of caffeine in tea plant (camellia sinensis (l.) o. kuntze) as defense response to colletotrichum fructicola. | tea plant (camellia sinensis) is one of the most economically valuable crops in the world. anthracnose can affect the growth of leaves and cause serious yield losses of tea. tea plants are rich in secondary metabolites; however, their roles in resistance to anthracnose are unclear. herein we compared the contents of total phenolics, catechins, and caffeine in two cultivars with different resistances to anthracnose during colletotrichum fructicola infection. (-)-epigallocatechin-3-gallate (egcg), ... | 2016 | 27541180 |
| nontargeted modification-specific metabolomics investigation of glycosylated secondary metabolites in tea (camellia sinensis l.) based on liquid chromatography-high-resolution mass spectrometry. | glycosylation on small molecular metabolites modulates a series of biological events in plants. however, a large number of glycosides have not been discovered and investigated using -omics approaches. here, a general strategy named "nontargeted modification-specific metabolomics" was applied to map the glycosylation of metabolites. the key aspect of this method is to adopt in-source collision-induced dissociation to dissociate the glycosylated metabolite, causing a characteristic neutral loss pa ... | 2016 | 27541009 |
| the immunomodulatory potential of selected bioactive plant-based compounds in breast cancer: a review. | breast cancer has continued to cause high cancer death rates among women worldwide. the use of plants' natural products in breast cancer treatment has received more attention in recent years due to their potentially wider safety margin and the potential to complement conventional chemotherapeutic drugs. plant-based products have demonstrated anticancer potential through different biological pathways including modulation of the immune system. immunomodulatory properties of medicinal plants have b ... | 2016 | 27539316 |
| identification of the invertase gene family (invs) in tea plant and their expression analysis under abiotic stress. | fourteen invertase genes were identified in the tea plant, all of which were shown to participate in regulating growth and development, as well as in responding to various abiotic stresses. invertase (inv) can hydrolyze sucrose into glucose and fructose, which plays a principal role in regulating plant growth and development as well as the plants response to various abiotic and biotic stresses. however, currently, there is a lack of reported information, regarding the roles of invs in either tea ... | 2016 | 27538912 |
| safety and anti-hyperglycemic efficacy of various tea types in mice. | tea, a beverage consumed worldwide, has proven anti-hyperglycemic effects in animal models. better efficacies of tea beverages are frequently associated with high-dose levels, whose safety attracts considerable attention. based on the inherent nature of tea catechin oxidation, fresh tea leaves are manufactured into diverse tea types by modulating the oxidation degree of catechins. the present study aimed to assess various tea types for their safety properties and anti-hyperglycemic effects. mice ... | 2016 | 27531374 |
| immobilized tannase treatment alters polyphenolic composition in teas and their potential anti-obesity and hypoglycemic activities in vitro. | the aim of this work was to assess the effect of immobilized-tannase treatment on black, green, white and mate tea components and on their bioactivities relevant to obesity. tannase treatment caused predictable changes in polyphenol composition with substantial reduction in galloylated catechins in green, white and black tea. mate tea, which is rich in chlorogenic acids, was much less affected by tannase treatment although some degradation of caffeoyl quinic acid derivatives was noted. the origi ... | 2016 | 27528497 |