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  1 / 8294 MEDLINE  
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[PMID]:29462204
[Au] Autor:Li H; Li M; Yang X; Gui X; Chen G; Chu J; He X; Wang W; Han F; Li P
[Ad] Endereço:Research Center for Translational Medicine at Shanghai East Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, China.
[Ti] Título:Microbial diversity and component variation in Xiaguan Tuo Tea during pile fermentation.
[So] Source:PLoS One;13(2):e0190318, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Xiaguan Tuo Tea is largely consumed by the Chinese, but there is little research into the microbial diversity and component changes during the fermentation of this tea. In this study, we first used fluorescence in situ hybridization (FISH), next-generation sequencing (NGS) and chemical analysis methods to determine the microbial abundance and diversity and the chemical composition during fermentation. The FISH results showed that the total number of microorganisms ranges from 2.3×102 to 4.0×108 cells per gram of sample during fermentation and is mainly dominated by fungi. In the early fermentation stages, molds are dominant (0.6×102~2.8×106 cells/g, 0~35 d). However, in the late stages of fermentation, yeasts are dominant (3.6×104~9.6×106 cells/g, 35~56 d). The bacteria have little effect during the fermentation of tea (102~103 cells/g, <1% of fungus values). Of these fungi, A. niger (Aspergillus niger) and B. adeninivorans (Blastobotrys adeninivorans) are identified as the two most common strains, based on Next-generation Sequencing (NGS) analysis. Peak diversity in tea was observed at day 35 of fermentation (Shannon-Weaver index: 1.195857), and lower diversity was observed on days 6 and 56 of fermentation (Shannon-Weaver index 0.860589 and 1.119106, respectively). During the microbial fermentation, compared to the unfermented tea, the tea polyphenol content decreased by 54%, and the caffeine content increased by 59%. Theanine and free amino acid contents were reduced during fermentation by 81.1 and 92.85%, respectively.
[Mh] Termos MeSH primário: Fermentação
Chá/microbiologia
[Mh] Termos MeSH secundário: Bactérias/isolamento & purificação
China
Contagem de Colônia Microbiana
Fungos/isolamento & purificação
Sequenciamento de Nucleotídeos em Larga Escala
Hibridização in Situ Fluorescente
Chá/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Tea)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180221
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190318


  2 / 8294 MEDLINE  
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[PMID]:29355013
[Au] Autor:Zhang W; Li X; Hua F; Chen W; Wang W; Chu GX; Bao GH
[Ad] Endereço:Natural Products Laboratory, International Joint Lab of Tea Chemistry and Health Effects, State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University , Hefei, 230036 People's Republic of China.
[Ti] Título:Interaction between Ester-Type Tea Catechins and Neutrophil Gelatinase-Associated Lipocalin: Inhibitory Mechanism.
[So] Source:J Agric Food Chem;66(5):1147-1156, 2018 Feb 07.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Tea is thought to alleviate neurotoxicity due to the antioxidative effect of ester-type tea catechins (ETC). Neutrophil gelatinase-associated lipocalin (NGAL) can sensitize ß-amyloid (Aß) induced neurotoxicity, and inhibitors of NGAL may relieve associated symptoms. As such, the interactions of ETC with NGAL were investigated by fluorescence spectrometry and molecular simulation. NGAL fluorescence is quenched regularly when being added with six processing types of tea infusion (SPTT) and ETC. Thermodynamic analyses suggest that ETC with more catechol moieties has a stronger binding capacity with NGAL especially in the presence of Fe . (-)-Epicatechin 3-O-caffeoate (ECC), a natural product isolated from Zijuan green tea, shows the strongest binding ability with NGAL (K = 15.21 ± 8.68 nM in the presence of Fe ). All ETC are effective in protecting nerve cells against H O or Aß induced injury. The inhibitory mechanism of ETC against NGAL supports its potential use in attenuation of neurotoxicity.
[Mh] Termos MeSH primário: Catequina/farmacologia
Lipocalina-2/farmacologia
Chá/química
[Mh] Termos MeSH secundário: Catequina/metabolismo
Interações Medicamentosas
Ésteres
Peróxido de Hidrogênio/farmacologia
Quelantes de Ferro
Lipocalina-2/antagonistas & inibidores
Lipocalina-2/metabolismo
Modelos Moleculares
Neurônios/efeitos dos fármacos
Fármacos Neuroprotetores
Espectrometria de Fluorescência
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Esters); 0 (Iron Chelating Agents); 0 (Lipocalin-2); 0 (Neuroprotective Agents); 0 (Tea); 8R1V1STN48 (Catechin); BBX060AN9V (Hydrogen Peroxide)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180226
[Lr] Data última revisão:
180226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180123
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.7b05399


  3 / 8294 MEDLINE  
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[PMID]:29361988
[Au] Autor:Yoto A; Fukui N; Kaneda C; Torita S; Goto K; Nanjo F; Yokogoshi H
[Ad] Endereço:School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan. ai_yoto@hotmail.com.
[Ti] Título:Black tea aroma inhibited increase of salivary chromogranin-A after arithmetic tasks.
[So] Source:J Physiol Anthropol;37(1):3, 2018 Jan 24.
[Is] ISSN:1880-6805
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Growing attention has been paid to the effects of food flavor components on alleviating negative brain functions caused by stressful lifestyles. In this study, we investigated the alleviating effect of two kinds of black tea aromas on physical and psychological stress induced by the Uchida-Kraepelin test, based on salivary chromogranin-A (CgA) levels as a stress marker and subjective evaluations (Profile of Mood States). RESULTS: Compared with the water exposure control, inhaling black tea aroma (Darjeeling and Assam in this study) induced lower salivary CgA concentration levels after 30 min of mental stress load tasks. This anti-stress effect of black tea aroma did not differ between the two tea types even though the concentration of the anti-stress components in the Darjeeling tea aroma was higher than that in the Assam aroma. However, Darjeeling tea aroma tended to decrease the tension and/or anxiety score immediately after the first exposure. CONCLUSIONS: Inhaling black tea aroma may diminish stress levels caused by arithmetic mental stress tasks, and Darjeeling tea aroma tended to improve mood before mental stress load.
[Mh] Termos MeSH primário: Afeto/efeitos dos fármacos
Cromogranina A/análise
Odorantes/análise
Saliva/química
Estresse Psicológico/metabolismo
Chá
[Mh] Termos MeSH secundário: Adulto
Ansiedade/metabolismo
Feminino
Seres Humanos
Masculino
Análise e Desempenho de Tarefas
Escala Visual Analógica
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE; RANDOMIZED CONTROLLED TRIAL
[Nm] Nome de substância:
0 (Chromogranin A); 0 (Tea)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180223
[Lr] Data última revisão:
180223
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180125
[St] Status:MEDLINE
[do] DOI:10.1186/s40101-018-0163-0


  4 / 8294 MEDLINE  
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[PMID]:29254289
[Au] Autor:Gerges Geagea A; Rizzo M; Eid A; Hajj Hussein I; Zgheib Z; Zeenny MN; Jurjus R; Uzzo ML; Spatola GF; Bonaventura G; Leone A; Massaad-Massade L; Jurjus A
[Ad] Endereço:Department of Anatomy, Cell Biology and Physiological Sciences, Faculty of Medicine, American University of Beirut, Beirut, Lebanon.
[Ti] Título:Tea catechins induce crosstalk between signaling pathways and stabilize mast cells in ulcerative colitis.
[So] Source:J Biol Regul Homeost Agents;31(4):865-877, 2017 Oct-Dec.
[Is] ISSN:0393-974X
[Cp] País de publicação:Italy
[La] Idioma:eng
[Ab] Resumo:It is well documented that nutraceuticals, in general, and Green tea catechins, in particular, possess a potential therapeutic value in inflammatory bowel diseases (IBD) due to their anti-oxidative and anti-inflammatory effects. This study aimed to investigate the possible mechanism of action of catechins in a rat model of colitis induced by 2.4.6 trinitrobenzene sulfonic acid (TNBS). Thirty-five young adult Sprague-Dawley rats were divided into four groups: normal control (n=5), catechins (n=9), TNBS (n=9) and TNBS plus catechins (n=12) treated. Catechin in the form of Epigallocatechin-3-gallate (EGCG) was administered daily by intraperitoneal injection, 1 week before the induction date of UC. Biopsies of the descending colon were collected on days 3, 10 and 17, and partly frozen for molecular studies or fixed for light microscopy. The status of intestinal tissue alterations and mast cells number were also assessed, as well as the mRNA expressions of IL-6, TNF-a and NF-kB, and determination of ROS expression. Histological data depicted a significant amelioration in the TNBS- and EGCG-treated rats compared to the non-treated animals. Catechin expressed strong anti-inflammatory and anti-oxidant effects, ameliorated ulcerative colitis and stabilized mast cells. The mechanism of action occurred basically through the NF-kB pathway and possibly through a crosstalk with other pathways.
[Mh] Termos MeSH primário: Anti-Inflamatórios/farmacologia
Antioxidantes/farmacologia
Catequina/análogos & derivados
Colite/tratamento farmacológico
Colo/efeitos dos fármacos
Transdução de Sinais/efeitos dos fármacos
Chá/química
[Mh] Termos MeSH secundário: Animais
Anti-Inflamatórios/isolamento & purificação
Antioxidantes/isolamento & purificação
Catequina/isolamento & purificação
Catequina/farmacologia
Colite/induzido quimicamente
Colite/imunologia
Colite/patologia
Colo/imunologia
Colo/patologia
Regulação da Expressão Gênica
Interleucina-6/genética
Interleucina-6/imunologia
Masculino
Mastócitos/efeitos dos fármacos
Mastócitos/imunologia
Mastócitos/patologia
NF-kappa B/genética
NF-kappa B/imunologia
Ratos
Ratos Sprague-Dawley
Espécies Reativas de Oxigênio/imunologia
Espécies Reativas de Oxigênio/metabolismo
Ácido Trinitrobenzenossulfônico
Fator de Necrose Tumoral alfa/genética
Fator de Necrose Tumoral alfa/imunologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anti-Inflammatory Agents); 0 (Antioxidants); 0 (Interleukin-6); 0 (NF-kappa B); 0 (Reactive Oxygen Species); 0 (Tea); 0 (Tumor Necrosis Factor-alpha); 8R1V1STN48 (Catechin); 8T3HQG2ZC4 (Trinitrobenzenesulfonic Acid); BQM438CTEL (epigallocatechin gallate)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180222
[Lr] Data última revisão:
180222
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171220
[St] Status:MEDLINE


  5 / 8294 MEDLINE  
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[PMID]:28455458
[Au] Autor:Seyani C; Green P; Daniel L; Pegden A
[Ad] Endereço:Great Western Hospital, Swindon, UK.
[Ti] Título:An interesting case of opium tea toxicity.
[So] Source:BMJ Case Rep;2017, 2017 Apr 28.
[Is] ISSN:1757-790X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:We present an unusual cause of respiratory arrest resulting from sole ingestion of home-brewed opium tea. A 64-year-old woman was found unresponsive and in respiratory arrest by a first responder. There were no obvious signs of regular recreational drug use. On presentation to the local district general hospital, the patient was in extremis, with severe physiological and biochemical derangements. A naloxone infusion was commenced and she later made a good recovery. It was subsequently discovered that she had brewed opium tea from opium buds she had picked from a nearby commercial poppy farm, a practice she had learnt while in Afghanistan.
[Mh] Termos MeSH primário: Transtornos Relacionados ao Uso de Opioides/diagnóstico
Ópio/toxicidade
Chá/toxicidade
[Mh] Termos MeSH secundário: Administração Intravenosa
Afeganistão
Coma/diagnóstico
Coma/etiologia
Feminino
Seres Humanos
Meia-Idade
Naloxona/administração & dosagem
Naloxona/uso terapêutico
Antagonistas de Entorpecentes/administração & dosagem
Antagonistas de Entorpecentes/uso terapêutico
Transtornos Relacionados ao Uso de Opioides/epidemiologia
Ópio/administração & dosagem
Resultado do Tratamento
[Pt] Tipo de publicação:CASE REPORTS; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Narcotic Antagonists); 0 (Tea); 36B82AMQ7N (Naloxone); 8008-60-4 (Opium)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180220
[Lr] Data última revisão:
180220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170430
[St] Status:MEDLINE


  6 / 8294 MEDLINE  
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[PMID]:29394016
[Au] Autor:Nualsri C; Lourith N; Kanlayavattanakul M
[Ti] Título:Development and clinical evaluation of green tea hair tonic for greasy scalp treatment.
[So] Source:J Cosmet Sci;67(3):161-66, 2016 May-Jun.
[Is] ISSN:1525-7886
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Green tea has cosmetic benefits that include activities against androgen disorders. A hair tonic containing green tea for reduction of scalp sebum was developed and clinically evaluated. Stable green tea hair tonics were closed-patch tested and clinically evaluated in 20 volunteers for 28 days by using a Sebumeter ® . Hair tonic base with glycerin and butylene glycol (total 4%) gained the highest consumers' preference was incorporated with green tea extract. All of the products were stable and none caused skin irritation. Green tea hair tonic (2%) significantly (p ≤ 0.024) lowered scalp sebum for 21 and 28 days following the application, suggesting that this topical therapy of scalp greasiness is safe and efficient.
[Mh] Termos MeSH primário: Preparações para Cabelo/uso terapêutico
Extratos Vegetais/uso terapêutico
Dermatoses do Couro Cabeludo/tratamento farmacológico
Sebo/efeitos dos fármacos
Chá
[Mh] Termos MeSH secundário: Administração Cutânea
Adulto
Feminino
Preparações para Cabelo/farmacologia
Seres Humanos
Masculino
Testes do Emplastro
Extratos Vegetais/farmacologia
Valores de Referência
Sebo/secreção
Adulto Jovem
[Pt] Tipo de publicação:CLINICAL TRIAL; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Hair Preparations); 0 (Plant Extracts); 0 (Tea)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180215
[Lr] Data última revisão:
180215
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180203
[St] Status:MEDLINE


  7 / 8294 MEDLINE  
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[PMID]:29300151
[Au] Autor:Niu L; Xiong M; Zhang J; Xiang Y; Song L; Hua Z; Li W
[Ad] Endereço:1​Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University, Shanghai 200444, PR China.
[Ti] Título:Bacillus camelliae sp. nov., isolated from Pu'er tea.
[So] Source:Int J Syst Evol Microbiol;68(2):564-569, 2018 Feb.
[Is] ISSN:1466-5034
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A novel aerobic, Gram-stain-positive, sporogenous, rod-shaped bacterial strain, 7578-1 , was isolated from ripened Pu'er tea. Based on 16S rRNA gene sequence similarity comparisons, strain 7578-1 was grouped into the genus Bacillus and appeared to be closely related to the type strains Bacillus shackletoniiLMG 18435 (98.4 %), Bacillus acidicolaDSM 14745 (97.6 %), Bacillus paralicheniformis KACC 18426 (97.2 %) and Bacillus ginsengihumi KCTC 13944 (96.7 %). The fatty acid profile containing the major fatty acids, iso-C15 : 0, anteiso-C15 : 0 and anteiso-C17 : 0 supported the allocation of strain 7578-1 to the genus Bacillus. The strain had a cell-wall type A1γ peptidoglycan with meso-diaminopimelic acid as the diagnostic diamino acid. The major menaquinone was MK-7 (95 %). The predominant polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylmethylethanolamine, phosphatidylethanolamine, one unidentified phospholipid and one unidentified lipid. The average nucleotide identity values between strain 7578-1 and its most closely related species were 67.8-82.4 % by OrthoANIu analysis. The DNA-DNA relatedness value between strain 7578-1 and the type strains of closely related species were 17-39 %, again indicating that strain 7578-1 represented a novel species in the genus Bacillus. The DNA G+C content of strain 7578-1 was 36.0 mol%. On the basis of the presented polyphasic evidence, strain 7578-1 is considered to represent a novel species of the genus Bacillus, for which we propose the name Bacillus camelliae sp. nov. The type strain is 7578-1 (=CGMCC 1.15374 =KCTC 33845 ).
[Mh] Termos MeSH primário: Bacillus/classificação
Microbiologia de Alimentos
Filogenia
Chá/microbiologia
[Mh] Termos MeSH secundário: Bacillus/genética
Bacillus/isolamento & purificação
Técnicas de Tipagem Bacteriana
Composição de Bases
Parede Celular/química
China
DNA Bacteriano/genética
Ácido Diaminopimélico/química
Ácidos Graxos/química
Hibridização de Ácido Nucleico
Peptidoglicano/química
Fosfolipídeos/química
RNA Ribossômico 16S/genética
Análise de Sequência de DNA
Vitamina K 2/análogos & derivados
Vitamina K 2/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (Fatty Acids); 0 (Peptidoglycan); 0 (Phospholipids); 0 (RNA, Ribosomal, 16S); 0 (Tea); 11032-49-8 (Vitamin K 2); 583-93-7 (Diaminopimelic Acid); 8427BML8NY (vitamin MK 7)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180212
[Lr] Data última revisão:
180212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180105
[St] Status:MEDLINE
[do] DOI:10.1099/ijsem.0.002542


  8 / 8294 MEDLINE  
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[PMID]:29245319
[Au] Autor:Nie JY; Zhao Q
[Ad] Endereço:aDepartment of Gastroenterology, Zhongnan Hospital of Wuhan UniversitybHubei Clinical Center & Key Lab of Intestinal & Colorectal Diseases, Wuhan, Hubei Province, China.
[Ti] Título:Beverage consumption and risk of ulcerative colitis: Systematic review and meta-analysis of epidemiological studies.
[So] Source:Medicine (Baltimore);96(49):e9070, 2017 Dec.
[Is] ISSN:1536-5964
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Epidemiological studies have provided controversial evidence between beverage consumption and the risk of ulcerative colitis (UC). This study aimed to determine the role of beverage consumption in the development of UC. A systematic search was conducted in public databases to identify all relevant studies, and study-specific relative risks (RRs) and 95% confidence intervals (CIs) were pooled using a random-effects model. Sixteen studies were identified with a total of 3689 cases and 335,339 controls. Alcohol consumption showed no significant association with UC risk (RR for the highest vs the lowest consumption level: 0.95, 95% CI: 0.65-1.39). Coffee consumption tended to be inversely associated with UC risk (RR: 0.58, 95% CI: 0.33-1.05), but it was not significant and confounded by smoking adjustment. Soft drinks consumption was associated with UC risk (RR: 1.69, 95% CI: 1.24-2.30), and tea consumption was inversely associated with UC risk (RR: 0.69, 95% CI: 0.58-0.83). In conclusion, high consumption of soft drinks might increase the risk of UC, while tea consumption might decrease the risk.
[Mh] Termos MeSH primário: Bebidas Gaseificadas/efeitos adversos
Colite Ulcerativa/induzido quimicamente
[Mh] Termos MeSH secundário: Bebidas Alcoólicas
Café
Colite Ulcerativa/epidemiologia
Seres Humanos
Fatores de Risco
Chá
[Pt] Tipo de publicação:JOURNAL ARTICLE; META-ANALYSIS; REVIEW
[Nm] Nome de substância:
0 (Coffee); 0 (Tea)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180108
[Lr] Data última revisão:
180108
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:171217
[St] Status:MEDLINE
[do] DOI:10.1097/MD.0000000000009070


  9 / 8294 MEDLINE  
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[PMID]:29211766
[Au] Autor:Ban Q; Wang X; Pan C; Wang Y; Kong L; Jiang H; Xu Y; Wang W; Pan Y; Li Y; Jiang C
[Ad] Endereço:State Key Laboratory of Tea Plant Biology and Utilization/key Laboratory of Tea Biology and Processing, Ministry of Agriculture, Anhui Agricultural University, Hefei City, Anhui Province, PR China.
[Ti] Título:Comparative analysis of the response and gene regulation in cold resistant and susceptible tea plants.
[So] Source:PLoS One;12(12):e0188514, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Cold environment is the main constraint for tea plants (Camellia sinensis) distribution and tea farming. We identified two tea cultivars, called var. sinensis cv. Shuchazao (SCZ) with a high cold-tolerance and var. assamica cv. Yinghong9 (YH9) with low cold-tolerance. To better understand the response mechanism of tea plants under cold stress for improving breeding, we compared physiological and biochemical responses, and associated genes expression in response to 7-day and 14-day cold acclimation, followed by 7-day de-acclimation in these two tea cultivars. We found that the low EL50, low Fv/Fm, and high sucrose and raffinose accumulation are responsible for higher cold tolerance in SCZ comparing with YH9. We then measured the expression of 14 key homologous genes, known as involved in these responses in other plants, for each stages of treatment in both cultivars using RT-qPCR. Our results suggested that the increased expression of CsCBF1 and CsDHNs coupling with the accumulation of sucrose play key roles in conferring higher cold resistance in SCZ. Our findings have revealed key genes regulation responsible for cold resistance, which help to understand the cold-resistant mechanisms and guide breeding in tea plants.
[Mh] Termos MeSH primário: Adaptação Fisiológica
Temperatura Baixa
Regulação da Expressão Gênica de Plantas
Genes de Plantas
Chá/fisiologia
[Mh] Termos MeSH secundário: Chá/genética
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Tea)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171229
[Lr] Data última revisão:
171229
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171207
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0188514


  10 / 8294 MEDLINE  
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[PMID]:28580652
[Au] Autor:Toman J; Malir F; Ostry V; Kilic MA; Roubal T; Grosse Y; Pfohl-Leszkowicz A
[Ad] Endereço:University of Hradec Kralove, Faculty of Science, Department of Biology, Hradec Kralove, Czech Republic.
[Ti] Título:Transfer of ochratoxin A from raw black tea to tea infusions prepared according to the Turkish tradition.
[So] Source:J Sci Food Agric;98(1):261-265, 2018 Jan.
[Is] ISSN:1097-0010
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Ochratoxin A (OTA) is a natural contaminant of food including tea with multiple toxic effects, which poses a threat to human health. In terms of lifestyle, the Turkish population is a frequent visitor of tearooms, and the traditional Turkish tea preparation is one of the most popular ways of preparing tea infusion. RESULTS: The aim of this study was to investigate OTA transfer from raw black tea to the tea infusion prepared according to the Turkish tradition. A high-performance liquid chromatography method with a limit of quantification of 0.35 ng g was used for OTA determination. The OTA amount in raw black teas from Turkey ranged from ≤0.35 ng g up to 56.7 ng g . An homogenised sample of black tea naturally contaminated with 55.0 ng g was used to prepare infusions. The OTA transfer from the black tea to the infusion was found to be 41.5% ± 7%. CONCLUSION: These data are important for the realisation of a 'Total Diet study' (TDS). The TDS can be a complementary tool to estimate the population dietary exposure to OTA across the entire diet by analysing main foods prepared 'as consumed' (tea infusions) and not 'as purchased' (raw tea). © 2017 Society of Chemical Industry.
[Mh] Termos MeSH primário: Camellia sinensis/química
Contaminação de Alimentos/análise
Ocratoxinas/análise
Chá/química
[Mh] Termos MeSH secundário: Cromatografia Líquida de Alta Pressão
Seres Humanos
Turquia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Ochratoxins); 0 (Tea); 1779SX6LUY (ochratoxin A)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171228
[Lr] Data última revisão:
171228
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170606
[St] Status:MEDLINE
[do] DOI:10.1002/jsfa.8464



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