Publications
| Title | Abstract | Year(sorted descending) Filter | PMID Filter |
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| the influence of different food and drink on tics in tourette syndrome. | tourette syndrome (ts) is characterized by waxing and waning motor and vocal tics. because standard medication often remains unsatisfactory, many patients seek alternative medicine. the aim of this study was to increase experience about the influence of food and drinks in ts. | 2008 | 18307557 |
| association between consumption of black tea and iron status in adult africans in the north west province: the thusa study. | the association between black tea consumption and iron status was investigated in a sample of african adults participating in the cross-sectional thusa (transition and health during urbanization of south africans) study in the north west province, south africa. data were analysed from 1605 apparently healthy adults aged 15-65 years by demographic and ffq, anthropometric measurements and biochemical analyses. the main outcome measures were hb and serum ferritin concentrations. no associations wer ... | 2008 | 18275622 |
| immobilized proanthocyanidins for the capture of bacterial lipopolysaccharides. | proanthocyanidins (pacs) are an abundant class of compounds found in a variety of plant materials. here we demonstrate the application of these materials as capture molecules for the removal of bacterial lipopolysaccharide (lps) from solution. pacs from whole cranberries, grape juice, black tea, and cranberry juice were purified and immobilized onto thiol-activated sepharose beads. this material was used in pull-down type assays for the capture of lps. the binding of lps by pacs has been shown t ... | 2008 | 18257561 |
| gas chromatographic method for the determination of hexaconazole residues in black tea. | a highly reliable, quantitative and sensitive analytical method for determining the residues of the fungicide, hexaconazole in black tea is described. the proposed method is based on liquid-liquid extraction followed by gas chromatographic determination, using nitrogen phosphorus detector (gc-npd) for the identification and quantitation of hexaconazole. the most appropriate solvent mixture for extracting hexaconazole residues from black tea was n-hexane:acetone at 1:1 (v/v). the extract was clea ... | 2008 | 18257139 |
| expression and biochemical characterization of beta-primeverosidase and application of beta-primeverosylamidine to affinity purification. | beta-primeverosidase (pd) is a family 1 glycosidase catalyzing the hydrolysis of beta-primeverosides (6-o-beta-d-xylopyranosyl-beta-d-glucopyranosides) to release a disaccharide primeverose. to investigate how pd recognizes the disaccharide moiety of beta-primeverosides, the recombinant pd was expressed by a baculovirus-insect cell system. the recombinant pd was secreted from high five cells and was properly modified with n-glycosylation and correct cleavage at the n-terminal signal peptide. the ... | 2008 | 18256510 |
| simple and rapid uv spectrophotometry of caffeine in tea coupled with sample pre-treatment using a cartridge column filled with polyvinylpolypyrrolidone (pvpp). | we have applied a sample pre-treatment method with a cartridge column filled with polyvinylpolypyrrolidone (pvpp) to the effective removal of polyphenols and simple uv spectrophotometry of caffeine in tea. the absorption maximum length (lambda(max)) for caffeine was close to those for tea catechins in aqueous 1% acetic acid; therefore, the uv spectrum of a non-treated green tea sample had a large absorption wave. in contrast, the absorbance of the green tea sample was gradually reduced by pvpp c ... | 2008 | 18239305 |
| immunostimulating activity of a crude polysaccharide derived from green tea (camellia sinensis) extract. | green tea extract is well-known to reduce the risk of a variety of diseases. here, we investigated the immunostimulating activity of tea polysaccharide (tps), one of the main components in green tea extract. the water extracts from mature or immature tea leaves were precipitated by using ethanol at room temperature. the sediment was washed with ethanol and acetone alternately and then dried. we used the phagocytic activity of macrophage-like cells as an indicator of immune function activation. c ... | 2008 | 18232634 |
| tea polyphenols, their biological effects and potential molecular targets. | tea is the most popular beverage in the world, second only to water. tea contains an infusion of the leaves from the camellia sinensis plant rich in polyphenolic compounds known as catechins, the most abundant of which is (-)-egcg. although tea has been consumed for centuries, it has only recently been studied extensively as a health-promoting beverage that may act to prevent a number of chronic diseases and cancers. the results of several investigations indicate that green tea consumption may b ... | 2008 | 18228206 |
| coffee, tea, and incident type 2 diabetes: the singapore chinese health study. | increasing coffee intake was inversely associated with risk of type 2 diabetes in populations of european descent; however, data from high-risk asian populations are lacking as are data on tea intake in general. | 2008 | 18842784 |
| screening of dhfr-binding drugs by maldi-tofms. | the class of antimetabolite chemotherapeutical agents has been used to treat cancers in humans for almost 50 years and gives significant results by binding dihydrofolate reductase (dhfr), a key enzyme in dna synthesis. therefore, finding new active compounds inhibiting dna synthesis through their binding to dhfr is of prime interest. the aim of this work is to describe a protocol designed to study the binding of compounds to dhfr. this screening protocol involves matrix-assisted laser desorption ... | 2008 | 18841351 |
| total polyphenol content and antioxidant capacity of commercially available tea (camellia sinensis) in argentina. | tea, camellia sinensis (l.) o. kuntze (theaceae) is cultivated in argentina in the northeastern region (provinces of misiones and corrientes), between 26 degrees and 28 degrees south latitude, the southernmost area of the world where tea is cultivated. the objective of this work was to determine the total polyphenol content and the in vitro antioxidant capacity of green and black tea cultivated and industrialized in argentina. twelve samples of eight brands were analyzed. the total polyphenol co ... | 2008 | 18778031 |
| medicinal flowers. xxii. structures of chakasaponins v and vi, chakanoside i, and chakaflavonoside a from flower buds of chinese tea plant (camellia sinensis). | two acylated oleanane-type triterpene oligoglycosides, chakasaponins v and vi, an aromatic glycoside, chakanoside i, and an acylated flavonol oligoglycoside, chakaflavonoside a, were isolated from the flower buds of chinese tea plant [camellia sinensis (l.) o. kuntze]. the chemical structures of those new glycosides were elucidated on the basis of chemical and physicochemical evidence. | 2008 | 18758105 |
| theaflavins from black tea, especially theaflavin-3-gallate, reduce the incorporation of cholesterol into mixed micelles. | tea is one of the most widely consumed beverages in the world and may be associated with reduced heart disease rates. theaflavins, which are formed in the production of black tea, have been suggested being responsible for the blood-cholesterol-lowering (bcl) effects of tea. we hypothesized that the effect of theaflavins on bcl could be through interference in the formation of dietary mixed micelles, which could result in reduced intestinal cholesterol absorption. micelles were produced by mixing ... | 2008 | 19049290 |
| soft drink intake is associated with diet quality even among young japanese women with low soft drink intake. | unsweetened traditional japanese tea has long been the main beverage consumed in japan, with soft drinks only recently forming a part of people's diets. evidence suggests an association between soft drink intake and poor diet quality among youth in the united states. the association is not yet fully examined in the population with relatively low intake level of soft drinks such as the current japanese population. | 2008 | 19027402 |
| identification of green tea's (camellia sinensis (l.)) quality level according to measurement of main catechins and caffeine contents by hplc and support vector classification pattern recognition. | high performance liquid chromatography (hplc) was identified green tea's quality level by measurement of catechins and caffeine content. four grades of roast green teas were attempted in this work. five main catechins ((-)-epigallocatechin gallate (egcg), (-)-epigallocatechin (egc), (-)-epicatechin gallate (ecg), (-)-epicatechin (ec), and (+)-catechin (c)) and caffeine contents were measured simultaneously by hplc. as a new chemical pattern recognition, support vector classification (svc) was ap ... | 2008 | 18952392 |
| green tea (camellia sinensis) and cancer prevention: a systematic review of randomized trials and epidemiological studies. | green tea is one of the most popular beverages worldwide. this review summarizes the beneficial effects of green tea on cancer prevention. | 2008 | 18940008 |
| microwave heating of tea residue yields polysaccharides, polyphenols, and plant biopolyester. | microwave heating was used to produce aqueous-soluble components from green, oolong, and black tea residues. heating at 200-230 degrees c for 2 min extracted 40-50% of polysaccharides and 60-70% of the polyphenols. solubilization of arabinose and galactose by autohydrolysis occurred with heating above 170 degrees c, whereas heating above 200 degrees c was necessary to solubilize xylose. catechins were soluble in water by heating at low temperature (110 degrees c); however, new polyphenols having ... | 2008 | 18998700 |
| an epidemiologic study of tongue lesions in 1901 iranian dental outpatients. | the aim of this study was to assess the frequency of nine tongue conditions and evaluate their relationship to oral hygiene status and personal habits in a northern iranian population. | 2008 | 18997919 |
| green tea, soy, and mammographic density in singapore chinese women. | there is increasing evidence from observational studies that breast cancer risk is inversely associated with soy and green tea consumption. we investigated the effects of these two dietary agents on mammographic density, a well-established biomarker for breast cancer risk, in a cross-sectional analysis of mammograms and validated food frequency questionnaires from 3,315 chinese women in singapore. percent mammographic density (pmd) was assessed using a reproducible computer-assisted method. we u ... | 2008 | 19064551 |
| delayed effects of coffee, tea and sucrose on postprandial glycemia in lean, young, healthy adults. | in observational studies, habitual coffee consumption has been linked to a lower risk of type 2 diabetes. we hy-pothesized that the mechanism may be related to delayed effects on postprandial glycemia. the aim of this study is to investigate the glycemic and insulinemic effects of consumption of caffeinated and decaffeinated coffee, sweetened and unsweetened, tea and sucrose, 1 h prior to a high carbohydrate meal. on separate occasions in random order, lean young healthy subjects (n = 8) consume ... | 2008 | 19114405 |
| [liver injury induced by "natural remedies": an analysis of cases submitted to the spanish liver toxicity registry]. | toxic liver damage associated with the use of natural remedies is a growing health problem. | 2008 | 19159172 |
| [consumption of tea among population on the far north of russia]. | aim of present study was the getting data on tea and coffee consumption among population on the far north by 24-hour recall of dietary intake. about 84% of population have consumed the black tea. mean daily black and green tea intake among all population were 335 ml and 49 ml, correspondingly. | 2008 | 19227859 |
| mechanism for the detoxification of aluminum in roots of tea plant (camellia sinensis (l.) kuntze). | to determine the mechanism of aluminum (al) detoxification in the roots of tea plants (camellia sinensis (l.) kuntze), the amounts of al and al-chelating compounds (fluoride (f), organic acids and catechins) were measured and the chemical forms of al in root cell extracts were identified by the application of 27al-nuclear magnetic resonance (nmr) spectroscopy. tea plants were cultivated in nutrient solutions containing 0, 4, 1.0 and 4.0 mm of al at ph 4.2 for approximately 10 weeks. the levels o ... | 2008 | 17643454 |
| influence of green and black tea on folic acid pharmacokinetics in healthy volunteers: potential risk of diminished folic acid bioavailability. | previous in vitro studies using caco-2 cell monolayers suggested a possible interaction between green and black tea and folic acid at the level of intestinal absorption. the main purpose of the present study was to investigate a possible pharmacokinetic interaction between tea and folic acid in healthy volunteers. in an open-labeled randomized cross-over study, the pharmacokinetic interaction between tea and folic acid (0.4 mg and 5 mg) was investigated in healthy volunteers. water was used as t ... | 2008 | 18551467 |
| quasi-flow injection analysis for rapid determination of caffeine in tea using the sample pre-treatment method with a cartridge column filled with polyvinylpolypyrrolidone. | the sample pre-treatment method using a polyvinylpolypyrrolidone (pvpp) cartridge column combined with a quasi-flow injection analysis (quasi-fia) system realized the rapid determination of caffeine in three types of tea, green, oolong and black tea. the measurement time for each tea sample pre-treated using a pvpp cartridge column was shortened to 20s. in the present system, the limits of detection and quantification were 0.3 microm (1.5 pmol injected) and 0.7 microm (3.5 pmol injected), respec ... | 2008 | 18054948 |
| enzymatic oxidation of gallocatechin and epigallocatechin: effects of c-ring configuration on the reaction products. | tea leaf is rich in pyrogallol-type catechins, and their oxidation is important in the generation of black tea polyphenols. in the present study, the enzymatic oxidation of three pyrogallol-type catechins, (+)- and (-)-gallocatechins and (-)-epigallocatechin, was compared. the reactions yielded unstable quinone products, which were trapped as condensation products with o-phenylenediamine. the oxidation of (+)-gallocatechin proceeded very slowly compared to the reaction of (-)-epigallocatechin, a ... | 2008 | 17888464 |
| potential exposure and risk of fluoride intakes from tea drinks produced in taiwan. | tea is the second most commonly consumed drink in the world. excess fluoride intakes from tea drinks may cause health effects. this work assesses infusible fluoride levels in popular tea sold in taiwan and evaluates potential exposure factors. lungjing, pouchong, tienguanyin, oolong, pureh, and black tea specimens were purchased from different counties in taiwan. fluoride levels were evaluated in one complete cycle of tea making as well as at different calcium carbonate contents in water, with g ... | 2008 | 17410113 |
| in vitro assessment of the effectiveness of whitening dentifrices for the removal of extrinsic tooth stains. | this in vitro study evaluated the effectiveness of whitening dentifrices for the removal of extrinsic tooth stains. twenty dental blocks (4 x 4 mm), including enamel and dentine, removed from freshly extracted bovine incisors, were randomly divided into 4 groups: g1--distilled water, g2--colgate, g3--crest extra whitening and g4--rapid white. in all specimens, the dentin was covered with colorless nail polish, and the enamel was left exposed. next, the specimens were immersed in a solution of bl ... | 2008 | 18622478 |
| a review of the epidemiological evidence on tea, flavonoids, and lung cancer. | tea and its main bioactive ingredients, the flavonoids, have been associated with human cancer for several decades. in this article, an overview is provided of observational epidemiological studies of lung cancer incidence in relation to intake of green tea, black tea, flavonols/flavones, and catechins. a pubmed search was conducted in september 2007. articles were selected if they provided risk ratios (relative risk or odds ratio) for lung cancer and were of observational design (cohort, case-c ... | 2008 | 18641207 |
| green tea consumption is associated with decreased dna damage among gstm1-positive smokers regardless of their hogg1 genotype. | the levels of tobacco-related dna adducts in human tissues reflect a dynamic process that is dependent on the intensity and time of exposure to tobacco smoke, the metabolic balance between activation of detoxification mechanisms, and the removal of adducts by dna repair and/or cell turnover. urinary 8-hydroxydeoxyguanosine (8-ohdg) is probably 1 of the most abundant dna lesions formed during oxidative stress and is proposed as a sensitive biomarker of the overall oxidative dna damage and repair. ... | 2008 | 18641208 |
| effect of black tea in diethylnitrosamine-induced esophageal carcinogenesis in mice. | to evaluate the effect of black tea on esophageal carcinogenesis induced by the oral administration of diethylnitrosamine (den). | 2008 | 18641802 |
| [mechanism study of tea pigment on the selective against the colony growth of preneoplastic and normal syrian hamster embryo cells]. | to use co-cultures of she normal and preneoplastic cells in order to study the chemopreventive effects of doses of tea pigment (tp) from black tea on growth, proliferation, apoptosis and related regulation gene expression of normal and preneoplastic she cells. | 2008 | 18646525 |
| cloning of two cdnas encoding a family of atp sulfurylase from camellia sinensis related to selenium or sulfur metabolism and functional expression in escherichia coli. | atp sulfurylase, the first enzyme in the sulfate assimilation pathway of plants, catalyzes the formation of adenosine phosphosulfate from atp and sulfate. here we report the cloning of two cdnas encoding atp sulfurylase (aps1 and aps2) from camellia sinensis. they were isolated by rt-pcr and race-pcr reactions. the expression of aps1 and aps2 are correlated with the presence of atp sulfurylase enzyme activity in cell extracts. aps1 is a 1415-bp cdna with an open reading frame predicted to encode ... | 2008 | 18657428 |
| [chemical studies on plant polyphenols and formation of black tea polyphenols]. | recent biological and pharmacological studies strongly suggested that plant polyphenols in foods, beverages and crude drugs have various health benefits. however, still there are chemically uncharacterized polyphenols, especially those with large molecular weights. the typical example is black tea polyphenols. four tea catechins of fresh tea leaves are enzymatically oxidized in tea fermentation process of black tea manufacture to give a complex mixture of the oxidation products. despite many eff ... | 2008 | 18670177 |
| proteome analysis of tea pollen (camellia sinensis) under different storage conditions. | the protein complement of tea pollen collecting from tea tree (camellia sinensis) was compared under different storage conditions. protein was partially identified using a combination of the 2d-page, maldi-tof/ms, mascot, and xproteo search engine. two hundred and sixty-nine and 396 proteins were detected in pollen stored at room temperature (rt) and -20 degrees c, respectively. forty-three of the identified proteins were assigned to defense-related functions, energy metabolism, cytoskeleton, nu ... | 2008 | 18680303 |
| topographic and radiographic profile assessment of dental erosion. part iii: effect of green and black tea on human dentition. | this study compared green and black tea to soda and orange juice in terms of their erosive effect on the human dentition. vinegar and water were used as active and passive control fluids. an accelerated in vitro test was used to monitor how short- and long-term exposure to these fluids affected the topography and morphology of the coronal segments of the human dentition. this 20-week test was conducted under controlled conditions, independent of the influencing factors of the oral environment. t ... | 2008 | 18683403 |
| effect of genistein on the bioavailability and intestinal cancer chemopreventive activity of (-)-epigallocatechin-3-gallate. | the green tea (camellia sinensis) catechin, (-)-epigallocatechin-3-gallate (egcg), has shown cancer-preventive activity in animal models. previously, we have reported the bioavailability of egcg in rats and mice. here, we report that cotreatment of ht-29 human colon cancer cells with genistein (from soy) increased cytosolic egcg by 2- to 5-fold compared with treatment with egcg only. inclusion of genistein, at non-cytotoxic concentrations, increased the growth inhibitory effects of egcg against ... | 2008 | 18684728 |
| different types of tea products attenuate inflammation induced in trypanosoma brucei infected mice. | an in vivo study was carried out to determine the effect of different types of kenyan tea extracts on male swiss albino mice infected with trypanosoma brucei brucei isolate ketri 2710. the isolate produced a similar clinical picture after a pre-patent period of 5 days post-infection (dpi). parasitemia levels in the untreated mice and those given different teas developed exponentially at similar rates reaching similar densities at the peak of parasitemia 8 dpi. between 9 and 13 dpi parasitemia de ... | 2008 | 18456544 |
| safety of green tea extracts : a systematic review by the us pharmacopeia. | green tea [camellia sinensis (l.) kuntze] is the fourth most commonly used dietary supplement in the us. recently, regulatory agencies in france and spain suspended market authorization of a weight-loss product containing green tea extract because of hepatotoxicity concerns. this was followed by publication of adverse event case reports involving green tea products. in response, the us pharmacopeia (usp) dietary supplement information expert committee (dsi ec) systematically reviewed the safety ... | 2008 | 18484782 |
| epigallocatechin gallate improves serum lipid profile and erythrocyte and cardiac tissue antioxidant parameters in wistar rats fed an atherogenic diet. | oxidative stress is believed to contribute to the pathogenesis of hypercholesterolaemic atherosclerosis; hence, various antioxidant compounds are being evaluated for potential anti-atherogenic effects. the present study assessed the efficacy of epigallocatechin gallate (egcg), an antioxidant component of the plant camellia sinensis, in improving serum lipid profile and antioxidant parameters in erythrocytes and cardiac tissue in rats fed an atherogenic diet. in male albino wistar rats fed an ath ... | 2008 | 18485145 |
| pretreatment with black tea polyphenols modulates xenobiotic-metabolizing enzymes in an experimental oral carcinogenesis model. | the objective of this study was to evaluate the chemopreventive potential of the black tea polyphenols polyphenon-b and btf-35 during the preinitiation phase of 7,12-dimethylbenz[a]anthracene (dmba)-induced hamster buccal pouch (hbp) carcinogenesis. hamsters were divided into six groups. animals in groups 2 and 3 received diet containing polyphenon-b and btf-35, respectively, 4 weeks before carcinogen administration when they were 6 weeks of age and continued until the final exposure to carcinog ... | 2008 | 18543609 |
| effect of black tea brew of camellia sinensis on sexual competence of male rats. | in sri lankan traditional medicine black tea brew (btb) of camellia sinensis (l.) o. kuntze (theaceae) is claimed to have male sexual stimulant activity. as this claim is not scientifically tested and proven, this study was undertaken to evaluate the effects of btb on male sexual competence. | 2008 | 18565706 |
| extract of black tea (pu-ehr) inhibits postprandial rise in serum cholesterol in mice, and with long term use reduces serum cholesterol and low density lipoprotein levels and renal fat weight in rats. | a water-soluble extract of a traditional chinese fermented black tea, pu-ehr, decomposes bile acid cholesterol micelles. this black tea extract (bte) was studied to see if it could decrease the postprandial elevation of blood cholesterol levels after a single administration in ddy mice. it was found that bte (0.3 g/kg) significantly decreased the postprandial rise in blood cholesterol levels after oral administration of cholesterol (130 mg/kg). a non-fermented tea (i.e. green tea) extract did no ... | 2008 | 18570239 |
| an early gene of the flavonoid pathway, flavanone 3-hydroxylase, exhibits a positive relationship with the concentration of catechins in tea (camellia sinensis). | tea (camellia sinensis (l.) o. kuntze) leaves are a major source of flavonoids that mainly belong to the flavan 3-ols or catechins. apart from being responsible for tea quality, these compounds have medicinal properties. flavanone 3-hydroxylase (f3h) is an abundant enzyme in tea leaves that catalyzes the stereospecific hydroxylation of (2s)-naringenin to form (2r,3r)-dihydrokaempferol. we report a full-length cdna sequence of f3h from tea (csf3h accession no. ay641730). csf3h comprised 1365 bp w ... | 2008 | 18595847 |
| cloning and characterization of a cytosolic glutamine synthetase from camellia sinensis (l.) o. kuntze that is upregulated by aba, sa, and h2o2. | a cdna encoding glutamine synthetase, one of the enzymes of the gs/gogat pathway, was cloned from camellia sinensis (csgs). the isolated cdna consists of 1,071 nucleotides encoding a polypeptide of 356 amino acids with an estimated isoelectric point of 6.13. the recombinant protein purified from escherichia coli using ni-nta affinity chromatography showed molecular mass of 39.2 kda. the purified protein was confirmed by blotting with anti-his antibodies. catalytic parameters of the protein were ... | 2008 | 18074244 |
| assessment of fluoride concentration and daily intake by human from tea and herbal infusions. | the fluoride content in infusions of commercially available black, green, oolong, pu-erh and white teas was determined by ion-selective electrode. herbal infusions as well as instant tea and ready-to-drink tea beverages were also examined. it is found that brewing time (5, 10 and 30 min) does increase the fluoride content, which in infusions of black tea (5 min brewing) was higher than that in the other types of tea, with contents ranging between 0.32 and 4.54 mg/l for black tea to 0.37-0.54 mg/ ... | 2008 | 18078704 |
| epigallocatechin-3-gallate inhibits interleukin-1beta-induced muc5ac gene expression and muc5ac secretion in normal human nasal epithelial cells. | it has been reported that the proinflammatory cytokine interleukin-1beta (il-1beta) induces mucus hypersecretion in normal human nasal epithelial (nhne) cells and that the map kinase pathway may be an important signal pathway in il-1beta-induced muc5ac gene expression. green tea (camellia sinensis) polyphenols are potent anti-inflammatory agents and have been shown to inhibit inflammation in tumor cell lines and cultured respiratory epithelial cells. in this study, we examined the effect of (-)- ... | 2008 | 18155512 |
| differential effects of black versus green tea on risk of parkinson's disease in the singapore chinese health study. | data from asian populations on dietary and lifestyle factors associated with parkinson's disease are sparse. in 1993-2005, the authors examined these factors in relation to parkinson's disease in the singapore chinese health study, a prospective cohort of 63,257 chinese men and women. baseline data were collected through in-person interviews using structured questionnaires. all 157 incident parkinson's disease cases were identified either through follow-up interviews or via linkage with hospital ... | 2008 | 18156141 |
| [functional saponins in tea flower (flower buds of camellia sinensis): gastroprotective and hypoglycemic effects of floratheasaponins and qualitative and quantitative analysis using hplc]. | as a part of our characterization studies on the bioactive saponin constituents of tea flowers (camellia sinensis, flower buds), the methanolic extract and 1-butanol-soluble portion (the saponin fraction) from the flower buds were found to exhibit potent inhibitory effects on ethanol- and indomethacin-induced gastric mucosal lesions in rats and on serum glucose elevation in sucrose-loaded rats. among the constituents of the 1-butanol-soluble portion, floratheasaponins a, b, and c showed gastropr ... | 2008 | 18176066 |
| determination of in vitro antidiabetic effects, antioxidant activities and phenol contents of some herbal teas. | in this research, some herbal teas and infusions traditionally used in the treatment of diabetes in turkey, have been studied for their antidiabetic effects on in vitro glucose diffusion and phenolic contents and antioxidant activities. ten aqueous herbal tea extracts were examined using an in vitro method to determine their effects on glucose movement across the gastrointestinal tract. total phenol content of herbal teas was analyzed by folin-ciocalteu's procedure. antioxidant activities of her ... | 2008 | 18183488 |
| the association between personal habits and bladder cancer in turkey. | in this study, we analyzed the effect of turkish coffee and black tea consumption, alcohol intake and smoking on bladder cancer. | 2008 | 18247151 |
| theaflavin-3,3'-digallate, a component of black tea: an inducer of oxidative stress and apoptosis. | treatment of human oral squamous carcinoma hsc-2 cells and normal gn46 fibroblasts with theaflavin-3,3'-digallate (tf-3), a polyphenol in black tea, showed a concentration and time dependent inhibition of growth, with the tumor cells more sensitive than the fibroblasts. in buffer and in cell culture medium, tf-3 generated reactive oxygen species, with lower levels detected in buffer amended with catalase and superoxide dismutase, indicating the generation of hydrogen peroxide and superoxide, res ... | 2008 | 18248951 |
| combination chemoprevention of hamster buccal pouch carcinogenesis by bovine milk lactoferrin and black tea polyphenols. | combination chemoprevention is a promising approach for oral cancer prevention. the authors evaluated the combined chemopreventive effects of bovine milk lactoferrin (blf) and black tea polyphenols (polyphenon-b) in a clinically relevant in vivo model of 7,12-dimethylbenz[a]anthracene (dmba)-induced hamster buccal pouch (hbp) carcinogenesis. although dietary administration of blf and polyphenon-b alone significantly reduced the tumor incidence, combined administration of blf and polyphenon-b was ... | 2008 | 18259952 |
| l-theanine, a natural constituent in tea, and its effect on mental state. | tea is the most widely consumed beverage in the world after water. tea is known to be a rich source of flavonoid antioxidants. however tea also contains a unique amino acid, l-theanine that may modulate aspects of brain function in humans. evidence from human electroencephalograph (eeg) studies show that it has a direct effect on the brain (juneja et al. trends in food science & tech 1999;10;199-204). l-theanine significantly increases activity in the alpha frequency band which indicates that it ... | 2008 | 18296328 |
| an exposure and risk assessment for fluoride and trace metals in black tea. | exposure and associated health risks for fluoride and trace metals in black tea were estimated. fifty participants were randomly recruited to supply samples from the tea that they drink, and self-administer a questionnaire that inquired about personal characteristics and daily tea intake. analyzed trace metals included aluminum, arsenic, barium, cadmium, cobalt, chromium, copper, manganese, nickel, strontium, and zinc. fluoride and four metals (al, cr, mn, ni) were detected in all samples while ... | 2008 | 18329795 |
| theaflavin-3-gallate and theaflavin-3'-gallate, polyphenols in black tea with prooxidant properties. | this study compared the in vitro responses of human gingival fibroblasts and of carcinoma cells derived from the tongue to theaflavin-3-gallate (tf-2a) and theaflavin-3'-gallate (tf-2b), polyphenols in black tea. the antiproliferative and cytotoxic effects of the theaflavin monomers were more pronounced to the carcinoma, than to the normal, cells. in phosphate buffer at ph 7.4, the theaflavins generated hydrogen peroxide and the superoxide anion, suggesting that their mode of toxicity may be due ... | 2008 | 18346048 |
| polymeric black tea polyphenols induce phase ii enzymes via nrf2 in mouse liver and lungs. | among tea polyphenols, the anti-initiating properties of polymeric black tea polyphenols (pbps), the most abundant polyphenols in black tea, are poorly elucidated. hence, this study was undertaken to investigate the effects of pbp extract on the induction of phase ii enzymes. pbp extract induced transcriptional up-regulation of phase ii enzymes in liver and lungs by increasing nrf2-mediated antioxidant-responsive element (are) binding. pbp extract did not alter nrf2 or keap1 at the transcription ... | 2008 | 18358244 |
| characteristics of catechin- and theaflavin-mediated cardioprotection. | catechins and theaflavins-the main polyphenolic substances of green and black tea, respectively-exert a plethora of beneficial effects on the cardiovascular system. in a model of h(2)o(2)-mediated oxidative stress, we investigated the effects of epigallocatechin-3-gallate (egcg) and theaflavin-3,3'-digallate (tf3) on neonatal rat cardiomyocytes. pretreatment with egcg or tf3 1 hr prior to induction of oxidative stress by h(2)o(2) effectively protected cardiac myocytes as determined by measuring ... | 2008 | 18367631 |
| levels of selected heavy metals in black tea varieties consumed in saudi arabia. | the metal contents (fe, cu, zn, mn, cr, pb, ni, cd, co) of 17 black tea samples were analyzed by using inductively coupled plasma atomic emission spectroscopy (icp-aes). among the investigated metals mn was the highest (1,071.7 microg/g), whereas pb showed minimum levels (0.30 microg/g). iron was the second highest element found in black tea samples. lowest pb concentration (0.30 microg/g) was found in abu jabal tea; whereas maximum (2.2 microg/g) was found in manasul tea. lowest cd concentratio ... | 2008 | 18373271 |
| a mixture of extracts of black and green teas and mulberry leaf did not reduce weight gain in rats fed a high-fat diet. | tea extracts are used in many over-the-counter preparations claiming to promote weight loss. the rationale for this usage includes reports that green tea extract increases thermogenesis, and extracts of green and black tea and mulberry leaf inhibit the digestion/absorption of carbohydrate and fat. the investigators in this study tested the potential of increasing doses of a mixture of three extracts (50-percent black tea, 20-percent green tea, and 30-percent mulberry) to induce weight loss, stea ... | 2008 | 18377102 |
| pseudomonas aeruginosa immobilized multiwalled carbon nanotubes as biosorbent for heavy metal ions. | pseudomonas aeruginosa immobilized multiwalled carbon nanotubes has been used as biosorbent for the solid phase extraction of some heavy metal ions in environmental samples. cobalt(ii), cadmium(ii), lead(ii), manganese(ii), chromium(iii) and nickel(ii) ions have been selected as analytes for the presented study, due to their important negative and positive roles in human life. in order to investigate quantitative biosorption conditions of the analytes, the influences of ph of the aqueous solutio ... | 2008 | 17532628 |
| theanine prevents memory impairment induced by repeated cerebral ischemia in rats. | the present study investigated the neuroprotective effect of gamma-glutamylethylamide (theanine), a component japanese green tea (camellia sinensis), on memory impairment induced by twice-repeated cerebral ischemia in rats. theanine was injected i.p. immediately after the first occlusion. theanine (0.3 and 1 mg/kg) significantly prevented the impairment of spatial memory in rats subjected to repeated cerebral ischemia, 7 days after the second reperfusion. moreover, theanine (1 mg/kg) significant ... | 2008 | 17705146 |
| the efficacy of black tea in ameliorating endothelial function is equivalent to that of green tea. | consumption of tea has been shown to improve endothelial function. it is assumed that catechins are the tea components responsible for these beneficial effects. in black tea, catechin concentrations are significantly lower than in green tea. the present study was designed to compare green and black tea with regard to amelioration of endothelial function. endothelial function in response to both teas was assessed in bovine aortic endothelial cells (baec) and rat aortic rings. to elucidate whether ... | 2008 | 17916273 |
| molecular mechanism of black tea polyphenols induced apoptosis in human skin cancer cells: involvement of bax translocation and mitochondria mediated death cascade. | theaflavins (tf) and thearubigins (tr) are the most exclusive polyphenols of black tea. even though few previous reports showed the anticancer effects of tf through apoptosis, the potential effect of tr has not been appraised. this study investigated the induction of apoptosis in human skin cancer cells after treatment of tf and tr. we report that both tf and tr could exert inhibition of a431 (human epidermoid carcinoma) and a375 (human malignant melanoma) cell proliferation without adversely af ... | 2008 | 17984116 |
| black tea polyphenols mimic insulin/insulin-like growth factor-1 signalling to the longevity factor foxo1a. | in vertebrates and invertebrates, relationships between diet and health are controlled by a conserved signalling pathway responsive to insulin-like ligands. in invertebrate models for example, forkhead transcription factor family o (foxo) transcription factors in this pathway regulate the rate of aging in response to dietary cues, and in vertebrates, obesity and age-induced deficits in the same pathway are thought to contribute to dysregulation of hepatic gluconeogenesis through genes such as ph ... | 2008 | 18005251 |
| effect of species variation and processing on phenolic composition and in vitro antioxidant activity of aqueous extracts of cyclopia spp. (honeybush tea). | the in vitro antioxidant activity of aqueous extracts prepared from four cyclopia spp. (unfermented and fermented) was assessed using radical (abts *+) scavenging, ferric ion reduction, and inhibition of fe2+-induced microsomal lipid peroxidation as criteria. aqueous extracts of unfermented and fermented aspalathus linearis (rooibos) and camellia sinensis teas (green, oolong, and black) were included as reference samples. qualitative and quantitative differences in phenolic composition were demo ... | 2008 | 18198832 |
| in vitro antimicrobial activities against cariogenic streptococci and their antioxidant capacities: a comparative study of green tea versus different herbs. | the antimicrobial activity against cariogenic bacteria, total antioxidant capacity and phenolic constituents of methanolic extracts from 11 herbs were investigated and compared with those of green tea (camellia sinensis). among the 12 tested herbs, eight herbal extracts could inhibit the growth of streptococcus sanguinis. jasmine, jiaogulan, and lemongrass were the most potent, with minimum inhibitory concentrations (mic) of 1mg/ml, while green tea was less effective, with a mic of 4mg/ml. among ... | 2008 | 26047271 |
| changes in free-radical scavenging ability of kombucha tea during fermentation. | kombucha tea is a fermented tea beverage produced by fermenting sugared black tea with tea fungus (kombucha). free-radical scavenging abilities of kombucha tea prepared from green tea (gtk), black tea (btk) and tea waste material (twk) along with ph, phenolic compounds and reducing power were investigated during fermentation period. phenolic compounds, scavenging activity on dpph radical, superoxide radical (xanthine-xanthine oxidase system) and inhibitory activity against hydroxyl radical media ... | 2008 | 26054285 |
| health potential for functional green teas? | obesity is a major health problem in the developed and developing world. many "functional" foods and ingredients are advocated for their effects on body composition but few have consistent scientific support for their efficacy. however, an increasing amount of mechanistic and clinical evidence is building for green tea. the tea plant is naturally rich in a group of antioxidants known as catechins. unlike black tea, green tea production involves little processing and fermentation and therefore, g ... | 2008 | 19685436 |
| chromatographic examinations of tea's protection against lipid oxidative modifications. | ethanol metabolism is accompanied by generation of free radicals that damage cell components, especially lipids. the present study was designed to investigate the efficacy of the preventive effect of black tea on the lipid oxidative modifications in different tissues (plasma, liver, brain, kidney, stomach, lung, intestine, and spleen) of 12-month-old rats chronically intoxicated with ethanol. ethanol intoxication caused changes in the level/activity of antioxidants that led to the significant in ... | 2008 | 19696910 |
| changes in phospholipid composition studied by hplc and electric properties of liver cell membrane of ethanol-poisoned rats. | ethanol introduced into the organism undergoes rapid metabolism to acetaldehyde and then to acetic acid. the process is accompanied by formation of reactive oxygen species (ros), which damage mainly lipids of membrane cells. the effects of ros can be neutralized by administering preparations with antioxidant properties. the natural preparations of this kind are teas.this paper reports data on the effect of green and black tea on the surface charge density, content of phospholipids, and level of ... | 2008 | 19696939 |
| inhibitory effect of tea polyphenols on hepatic preneoplastic foci in wistar rats. | tea (camellia sinensis) is one of the most widely used beverages worldwide and tea consumption has been shown to have an inverse correlation to the incidence of human cancers in epidemiological and experimental studies. in the present study, the protective effects of green tea polyphenols (gtp) and black tea polyphenols (btp) in wistar rats were assessed by medium-term bioassay, using altered hepatic foci (ahf) as end point. animals were exposed to a single dose of diethylnitrosamine (den; 200 m ... | 2008 | 19057850 |
| a study on toxicity of gasoline and gm-10 on liver of mice and it's amelioration by black tea extract. | the aim of present study is to investigate the ameliorative effect of black tea extract on gasoline and gm-10 induced toxicity in liver of mice. eighty healthy male mice weighing 38-40 g approximately were divided into eight groups which included untreated control and various treated groups. mice were treated with gasoline 462 mg/kg/day and gm-10 low dose (206 mg/kg/day) and high dose (412 mg/kg/day) subcutaneously for 30 days. black tea extract was given as 2 g/100 ml drinking water (2% w/v) in ... | 2008 | 19051608 |
| long-term caffeine consumption reverses tumor-induced suppression of the innate immune response in adult mice. | caffeine (1,3,7-trimethylxanthine), the active principle alkaloid of coffee ( coffea arabica) and tea ( camellia sinensis) possesses a restraining effect on tumor-induced suppression of the specific immune response in adult mice. the present study deals with the effect of long-term consumption of caffeine in the development of ehrlich ascites carcinoma (eac) cells in adult swiss female mice, in relation to the innate immune response and tumor growth. although the consumption of caffeine alone fo ... | 2008 | 19016405 |
| an aqueous extract of green tea camellia sinensis increases expression of th1 cell-specific anti-asthmatic markers. | the present study provides evidence of the anti-asthmatic signaling activity of an aqueous fraction of green tea using specific in vitro and in vivo assays in an ovalbumin-induced asthmatic model. mice sensitized to ovalbumin were orally administered an aqueous extract of camellia sinensis. the lungs of these mice were then examined by hematoxylin and eosin staining and elisa analysis to measure cytokine expression. the aqueous extract of camellia sinensis exhibited potent anti-asthmatic activit ... | 2008 | 19020774 |
| antiproliferative and antimicrobial activity of traditional kombucha and satureja montana l. kombucha. | to carry out a preliminary investigation of the biological activity of kombucha beverages from camellia sinensis l. (black tea) and satureja montana l. (winter savory tea), that have consuming acidity. | 2008 | 18979556 |
| in vitro antioxidative potential of lactoferrin and black tea polyphenols and protective effects in vivo on carcinogen activation, dna damage, proliferation, invasion, and angiogenesis during experimental oral carcinogenesis. | the present study was designed to evaluate the in vitro antioxidant potential of bovine lactoferrin (blf) and black tea polyphenols [polyphenon-b (p-b)] as well as in vivo inhibitory effects on the development of 7,12-dimethylbenz[a]anthracene (dmba)-induced hamster buccal pouch (hbp) carcinomas. antioxidant activity was screened using a panel of assays including 1,1-diphenyl-2-picrylhydrazyl (dpph), 2,2'-azinobis-(3-ethyl-benzothiazoline-6-sulfonic acid) (abts), hydroxyl radical anion (oh*), su ... | 2008 | 18980016 |
| black tea polyphenols modulate xenobiotic-metabolizing enzymes, oxidative stress and adduct formation in a rat hepatocarcinogenesis model. | the present study was designed to investigate the modulatory effects of black tea polyphenols (polyphenon-b) on phase i and phase ii xenobiotic-metabolizing enzymes and oxidative stress in a rat model of hepatocellular carcinoma (hcc). liver tumours induced in male sprague-dawley rats by dietary administration of rho-dimethylaminoazobenzene (dab) increased cytochrome p450 (total and cyp1a1, 1a2 and 2b isoforms), cytochrome b(5), cytochrome b(5) reductase, glutathione s-transferase (gst total and ... | 2008 | 18985486 |
| pcr differential display-based identification of regulator of g protein signaling 10 as the target gene in human colon cancer cells induced by black tea polyphenol theaflavin monogallate. | we have previously reported that black tea polyphenol theaflavin monogallate (tf-2) suppressed cox-2 and induced apoptosis in human colon cancer cells [lu, j.b., ho, c.-t., ghai, g., chen, k.y., 2000. differential effects of theaflavin monogallates on cell growth, apoptosis and cox-2 gene expression in cancerous versus normal cells. cancer res. 60, 6465-6471.]. we now extended the study by using pcr-based differential display to search for genes that were selectively induced by tf-2. here we rep ... | 2008 | 18992738 |
| influence of culture media and environmental factors on mycelial growth and sporulation of lasiodiplodia theobromae (pat.) griffon and maubl. | lasiodiplodia theobromae, a common tea (camellia sinensis) pathogen, usually does not sporulate or sporulates poorly in common media, which makes spore production difficult. in this study the effects of culture media, carbon source, nitrogen source, temperature, ph and light on mycelial growth and sporulation were evaluated. among several carbon sources tested, glucose and sucrose were found superior for growth. potassium nitrate supplemented media showed maximum growth amongst the tested inorga ... | 2008 | 18972700 |
| paenibacillus camelliae sp. nov., isolated from fermented leaves of camellia sinensis. | a novel bacterium, strain blls-2(t) was isolated from pu'er tea. the isolate was gram-positive, endospore-forming motile rod that grew at 15 approximately 42 degrees c and ph 6.0 approximately 10.2. the dna g+c content was 48.3 mol%, the predominant isoprenoid quinone was mk-7, and the predominant cellular fatty acid was anteiso-c15:0 (54.2%) followed by c16:0 (15.5%) and iso-c16:0 (8.2%). the polar lipid pattern of blls-2(t) was characterized by the presence of diphosphatidylglycerol, phosphati ... | 2008 | 18974954 |
| green tea protects rats against autoimmune arthritis by modulating disease-related immune events. | green tea, a product of the dried leaves of camellia sinensis, is the most widely consumed beverage in the world. the polyphenolic compounds from green tea (pgt) possess antiinflammatory properties. we investigated whether pgt can afford protection against autoimmune arthritis and also examined the immunological basis of this effect using the rat adjuvant arthritis (aa) model of human rheumatoid arthritis (ra). aa can be induced in lewis rats (rt.1(l)) by immunization with heat-killed mycobacter ... | 2008 | 18936206 |
| polymeric black tea polyphenols inhibit 1,2-dimethylhydrazine induced colorectal carcinogenesis by inhibiting cell proliferation via wnt/beta-catenin pathway. | tea polyphenols like epigallocatechin gallate and theaflavins are established chemopreventive agents for colorectal carcinogenesis. however, studies on evaluating similar chemopreventive properties of thearubigins or polymeric black tea polyphenols (pbps), the most abundant polyphenols in black tea, are limited. hence, in the present study we aim to investigate chemopreventive effects along with probable mechanisms of action of pbp extract employing 1,2-dimethylhydrazine (dmh)-induced colorectal ... | 2008 | 18037152 |
| tea polyphenols benefit vascular function. | tea, the most popular beverage worldwide, is consumed in three basic forms; green tea, black tea and oolong tea. tea contains over 4,000 chemicals some of which are bioactive. in recent years there has been a mounting interest in understanding the cardiovascular and metabolic benefits of polyphenolic flavonoids in tea, which can be used as a supplement among patients. diverse cardioprotective effects of consuming tea or tea polyphenols have been described on pathological conditions, e. g. hypert ... | 2008 | 18815738 |
| quantitative assessment of metals in local brands of tea in pakistan. | in present study, mn, fe, zn, cu, co, pb, cr, ni and cd were analyzed by faas in green and black tea samples of locally available in the pakistani market. na and k were also determined by flame photometer. tea leaves can be the source of mineral components and trace elements, as well as some undesirable substances due to exposure to the environment. among the metals tested, k was the most abundant one followed by na, mn and fe. fortunately, toxic heavy metals, pb and cd, had the lowest contents ... | 2008 | 18817205 |
| volatile components of camellia sinensis inhibit growth and biofilm formation of oral streptococci in vitro. | this study aimed to evaluate the efficacy of semi fermented and non fermented camellia sinensis extracts (black and green tea) and comparison between them against streptococcus mutans atcc 25175, s. mitis atcc 9811 and s. sanguis atcc 10556 that are responsible for dental caries and bacteremias following dental manipulations. minimum inhibitory concentrations of both tea extracts were assessed by well diffusion and broth dilution methods and examination of cell adherence (biofilm inhibitory conc ... | 2008 | 18817265 |
| in vitro effects of tea polyphenols on redox metabolism, oxidative stress, and apoptosis in pc12 cells. | tea polyphenols, especially catechins, have been reported to be potent antioxidants and beneficial in oxidative stress-related diseases including cancer. numerous animal and cell culture models demonstrate anticancer effects of tea catechins. experimental and epidemiological evidence suggests the use of black tea polyphenols (btp), green tea catechins (especially epigallocatechin gallate [egcg]), and other polyphenols in preventing the progression of cancer both in animal and human populations. ... | 2008 | 18837911 |
| characterization of cellulose production by a gluconacetobacter xylinus strain from kombucha. | the aims of this work were to characterize and improve cellulose production by a gluconoacetobacter xylinus strain isolated from kombucha and determine the purity and some structural features of the cellulose from this strain. cellulose yield in tea medium with both black tea and green tea and in hestrin and schramm (hs) medium under both static and agitated cultures was compared. in the tea medium, the highest cellulose yield was obtained with green tea (approximately 0.20 g/l) rather than blac ... | 2008 | 18704575 |
| efficacy and safety of chinese black tea (pu-ehr) extract in healthy and hypercholesterolemic subjects. | water-extracted chinese black tea (pu-ehr) exerts a precipitating effect on mixed bile salt micelles in foods. the amount of black tea extract (bte) effective for hypercholesterolemia (hc) was examined in humans. | 2008 | 18769024 |
| antibacterial effects of green tea polyphenols on clinical isolates of methicillin-resistant staphylococcus aureus. | the antibacterial effects of tea polyphenols (tpp) extracted from korean green tea (camellia sinensis) against clinical isolates of methicillin-resistant staphylococcus aureus (mrsa) were evaluated. characterization of the minimal inhibitory concentration (mic) of oxacillin for 30 s. aureus strains isolated from patients treated with oxacillin identified 13 strains with an oxacillin mic >or= 4 microg/ml as methicillin-resistant staphylococcus aureus (mrsa) (range: 8 to 512 microg/ml), while 17 s ... | 2008 | 18781360 |
| preservation of kombucha tea-effect of temperature on tea components and free radical scavenging properties. | kombucha tea is sugared black tea fermented with a consortium of acetic acid bacteria and yeasts (tea fungus) for 14 days. the tea tastes slightly sweet and acidic. the formation of tea fungal biofilms during storage is a big problem when kombucha tea is being stored and commercialized. various thermal treatments have been tried for long-term storage of kombucha tea. the present study revealed the influence of heat on the biochemical constituents and the free radical scavenging properties of kom ... | 2008 | 18781766 |
| high level of genetic diversity among the selected accessions of tea (camellia sinensis) from abandoned tea gardens in western himalaya. | to revive cultivation of the tea unique to the western himalayan region, it is important to evaluate the seed-derived bushes available in the area's abandoned gardens. this study used quantitative leaf characters, catechin content, and aflp markers to assess these china cultivar type bushes. compared with other china cultivar germplasm, these accessions showed a higher level of diversity among themselves. among the quantitative morphological characters, leaf length is important in distinguishing ... | 2008 | 18784998 |
| polymeric black tea polyphenols inhibit mouse skin chemical carcinogenesis by decreasing cell proliferation. | the aim of this study was to investigate the antitumour promoting effects and possible mechanisms of action of the most abundant polymeric black tea polyphenols (pbps 1-5) or thearubigins, in vivo. | 2008 | 18400024 |
| evaluation of toxicity of green tea catechins with 90-day dietary administration to f344 rats. | green tea catechins (gtc), polyphenols extracted from the stalks and leaves of camellia sinensis, are found in the different types of tea beverages and as antioxidant additives to many foods, snacks, fats and fatty oils. as a part of their safety assessment, subchronic toxicity was investigated in male and female f344 rats with dietary administration at concentrations of 0 (control), 0.3%, 1.25% and 5.0% for 90 days. the average daily intakes of gtc in each group were 180, 764 and 3525mg/kg body ... | 2008 | 18400353 |
| quality assessment and quantitative analysis of flavonoids from tea samples of different origins by hplc-dad-esi-ms. | components of green tea ( camellia sinensis) have been of considerable interest in recent years because of their potential utility as pharmaceutical agents, particularly for their antioxidant and anticarcinogenic activity. responding to the increasing scientific validation of numerous health benefits of tea, a comprehensive approach was adopted to carry out analysis for the quality assessment of flavonoids in tea samples of different origins. for this purpose, extraction, separation, and mass sp ... | 2008 | 18442252 |
| pharmacological studies on indian black tea (leaf variety) in acute and chronic inflammatory conditions. | infusions of indian black tea (bti), when administered orally, produced significant inhibition of rat paw oedema, induced with carrageenin (pre and post treatment) and arachidonic acid. bti was also found to inhibit peritoneal capillary permeability and caused a marked reduction of lipopolysaccharide induced pge(2) generation. in these models, the observed antioedema effect was similar to that of bw755c (a dual inhibitor of cyclooxygenase and 5-lipoxygenase enzymes). bti was found to scavenge su ... | 2008 | 18446842 |
| [historical consideration of tea trees and tea flowers, especially regarding the use of tea flowers as food]. | not only tea leaves, but also many kinds of plants have been used as tea, even those plants not belonging to camellia sinensis, and they should be called "tea out of tea" in the lucidophyllous forest zone. generally, the tea leaf is drank after being decocted (almost boiled). the growth distribution of tea ranges in a belt-like zone of 30-40 degrees north latitude. therefore, tea might have grown wild as "yamacha (mountain tea)" from ancient times in japan as well as china. the first recored of ... | 2008 | 19227653 |
| effects of green and black tea biocomposites on endogenous synthesis, metabolism and genotoxic effect of carcinogenic n-nitrosodimethylamine. | to study the modifying effect of green and black tea biocomposites on endogenous synthesis and genotoxic action of the carcinogenic n-nitrosodimethylamine. | 2008 | 19112429 |
| caging a beast in the inflammation arena: use of chinese medicinal herbs to inhibit a late mediator of lethal sepsis, hmgb1. | sepsis refers to a systemic inflammatory response syndrome resulting from a microbial infection, which kills > 225,000 people annually in the u.s. alone. the high mortality of sepsis is partly mediated by bacterial endotoxin, which stimulates macrophages/monocytes to sequentially release early (e.g., tnf) and late (e.g., hmgb1) pro-inflammatory cytokines. although early proinflammatory cytokines may be protective against infection, excessive accumulation of late-acting proinflammatory mediators ... | 2008 | 19079688 |
| antihypercholesterolemic effect of chinese black tea extract in human subjects with borderline hypercholesterolemia. | a water-soluble extract of a traditional chinese black tea (pu-ehr) has been shown to precipitate mixed bile salt micelles in foods. in addition, long-term ingestion of this black tea extract (bte) significantly reduces blood cholesterol levels in rats. we investigated the effects of bte tablets (a formula designed to enhance compliance) as a dietary supplement in a 3-month double-blind randomized group comparison study in borderline hypercholesterolemic human subjects (n = 47). all subjects ing ... | 2008 | 19083445 |