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  1 / 126669 MEDLINE  
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[PMID]:27770709
[Au] Autor:Wang B; Chen Q; Shen L; Zhao S; Pang W; Zhang J
[Ad] Endereço:MOE-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China.
[Ti] Título:Perfluoroalkyl and polyfluoroalkyl substances in cord blood of newborns in Shanghai, China: Implications for risk assessment.
[So] Source:Environ Int;97:7-14, 2016 12.
[Is] ISSN:1873-6750
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Perfluoroalkyl and polyfluoroalkyl substances (PFASs) are commonly used in industrial applications and consumer products, and their potential health impacts are of concern, especially for vulnerable population like fetuses. However, in utero exposure to PFASs and health implications are far from fully characterized in China. To fill in the gap, we analyzed 10 PFASs in cord plasma samples (N=687) collected in Shanghai between 2011 and 2012, one of the regions widely polluted with PFASs in China. A questionnaire survey on maternal and diet-related factors was conducted. Except for perfluoroheptanoic acid (PFHpA) and perfluorooctane sulfonamide (PFOSA), all other PFASs were detected in ˃90% of the samples. Perfluorooctanoic acid (PFOA) was the most predominant PFAS (median value: 6.96ng/mL), followed by perfluorooctane sulfonate (PFOS) (2.48ng/mL). PFOA and PFOS combined contributed to 80% of the total PFASs. The final multiple regression models showed that maternal factors including maternal age, body mass index, gestational age, economic status and educational level as well as consumption of fish and wheat were significantly related with concentrations of PFASs in cord blood. The risk assessment using the hazard quotients (HQs) approach on the basis of plasma PFAS levels indicated no potential concern for developmental toxicity in the local newborns. The results demonstrate the unique profiles of local prenatal exposure to PFASs, suggesting that PFOA has been the primary human exposure due to its widespread use and pollution. Special attention to high PFOA exposure and confirmation of potential determinants should be taken as a priority in the future plan for risk management and actions in this area.
[Mh] Termos MeSH primário: Poluentes Ambientais/sangue
Sangue Fetal/química
Hidrocarbonetos Fluorados/sangue
[Mh] Termos MeSH secundário: Animais
China
Feminino
Peixes
Alimentos
Seres Humanos
Gravidez
Medição de Risco
Sulfonamidas/sangue
Ácidos Sulfônicos/sangue
Inquéritos e Questionários
Triticum
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Environmental Pollutants); 0 (Hydrocarbons, Fluorinated); 0 (Sulfonamides); 0 (Sulfonic Acids)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:180311
[Lr] Data última revisão:
180311
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161023
[St] Status:MEDLINE


  2 / 126669 MEDLINE  
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[PMID]:27770707
[Au] Autor:Liu Y; Liu Y; Li H; Fu X; Guo H; Meng R; Lu W; Zhao M; Wang H
[Ad] Endereço:School of Environment, Tsinghua University, Beijing 10084, China; Key Laboratory for Solid Waste Management and Environment Safety (Tsinghua University), Ministry of Education of China, Tsinghua University, Beijing 100084, China.
[Ti] Título:Health risk impacts analysis of fugitive aromatic compounds emissions from the working face of a municipal solid waste landfill in China.
[So] Source:Environ Int;97:15-27, 2016 12.
[Is] ISSN:1873-6750
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Aromatic compounds (ACs) emitted from landfills have attracted a lot of attention of the public due to their adverse impacts on the environment and human health. This study assessed the health risk impacts of the fugitive ACs emitted from the working face of a municipal solid waste (MSW) landfill in China. The emission data was acquired by long-term in-situ samplings using a modified wind tunnel system. The uncertainty of aromatic emissions is determined by means of statistics and the emission factors were thus developed. Two scenarios, i.e. 'normal-case' and 'worst-case', were presented to evaluate the potential health risk in different weather conditions. For this typical large anaerobic landfill, toluene was the dominant species owing to its highest releasing rate (3.40±3.79g·m ·d ). Despite being of negligible non-carcinogenic risk, the ACs might bring carcinogenic risks to human in the nearby area. Ethylbenzene was the major health threat substance. The cumulative carcinogenic risk impact area is as far as ~1.5km at downwind direction for the normal-case scenario, and even nearly 4km for the worst-case scenario. Health risks of fugitive ACs emissions from active landfills should be concerned, especially for landfills which still receiving mixed MSW.
[Mh] Termos MeSH primário: Poluentes Atmosféricos/análise
Resíduos Sólidos/análise
Compostos Orgânicos Voláteis/análise
[Mh] Termos MeSH secundário: Carcinógenos/análise
China
Seres Humanos
Eliminação de Resíduos
Risco
Tolueno/análise
Instalações de Eliminação de Resíduos
Vento
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Air Pollutants); 0 (Carcinogens); 0 (Solid Waste); 0 (Volatile Organic Compounds); 3FPU23BG52 (Toluene)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:180311
[Lr] Data última revisão:
180311
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161023
[St] Status:MEDLINE


  3 / 126669 MEDLINE  
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[PMID]:29505542
[Au] Autor:Shi Z; Ding H; Shen QW; Lu XG; Chen JY; Chen X; Tang X
[Ad] Endereço:Department of Medical Oncology.
[Ti] Título:The clinical manifestation, survival outcome and predictive prognostic factors of 137 patients with primary gastrointestinal lymphoma (PGIL): Strobe compliant.
[So] Source:Medicine (Baltimore);97(1):e9583, 2018 Jan.
[Is] ISSN:1536-5964
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:This retrospective study aimed to investigate clinical characteristics and prognostic factors in patients with primary gastrointestinal lymphoma (PGIL) of Chinese population.From January 2001 to December 2015, 137 patients diagnosed with PGIL were recruited. The clinical features, treatment, and follow-up information were analysed.The median patient age was 62.3 years. With 18.47 months follow-up, the 2-year progress-free survival and overall survival rate was 74.9% and 75.5%, respectively. The overall response rate was 33.6%. Age≥60 years, advanced Lugano staging (≥stage IIE), elevated lactate dehydrogenase (LDH) levels, ≥2 extra-nodal involved sites, National Comprehensive Cancer Network International Prognostic Index (NCCN-IPI)≥4, Ki-67≥50% were associated with worse prognosis in univariate analysis (P < .05). By multivariate analyses, we determined that the involvement of extra-nodal involved sites was the only statistically significant poor prognostic factor in PGIL.Age, staging, LDH levels, NCCN-IPI, Ki-67 especially involvement of multiple extra-nodal sites were associated with poor overall survival of PGIL.
[Mh] Termos MeSH primário: Neoplasias Gastrointestinais/mortalidade
Linfoma/mortalidade
[Mh] Termos MeSH secundário: Adulto
Idoso
Idoso de 80 Anos ou mais
Protocolos de Quimioterapia Combinada Antineoplásica
China/epidemiologia
Feminino
Neoplasias Gastrointestinais/diagnóstico
Neoplasias Gastrointestinais/patologia
Neoplasias Gastrointestinais/terapia
Trato Gastrointestinal/patologia
Seres Humanos
Linfoma/diagnóstico
Linfoma/patologia
Linfoma/terapia
Masculino
Meia-Idade
Estudos Retrospectivos
Análise de Sobrevida
Resultado do Tratamento
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE; OBSERVATIONAL STUDY
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:180306
[St] Status:MEDLINE
[do] DOI:10.1097/MD.0000000000009583


  4 / 126669 MEDLINE  
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[PMID]:29505534
[Au] Autor:Wu X; Yu C; Li T; Lin L; Xu Q; Zhu Q; Ye L; Gao X
[Ad] Endereço:Department of Urology, Fujian Provincial Hospital, Provincial Clinical College of Fujian Medical University, Fuzhou, Fujian, PR China.
[Ti] Título:Obesity was an independent risk factor for febrile infection after prostate biopsy: A 10-year single center study in South China.
[So] Source:Medicine (Baltimore);97(1):e9549, 2018 Jan.
[Is] ISSN:1536-5964
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:To detect the best antibiotic protocol for prostate biopsy and to assess the potential risk factors postbiopsy in Chinese patients.A total of 1526 patients underwent biopsy were assessed retrospectively. The effect of 3 antibiotic protocols was compared, including fluoroquinolone (FQ) monotherapy, third-generation cephalosporin combined with FQ and targeted antibiotics according to the prebiopsy rectal swab culture result. Postbiopsy infection (PBI) was defined as fever and/or active urinary tract symptoms such as dysuria or frequency with pyuria and/or leucocytosis, sepsis is defined as the presence of clinically or microbiologically documented infection in conjunction with systemic inflammatory response syndrome. The relationship between infections and clinical characteristics of patients was assessed. Data were first picked out in univariate analysis and then enter multivariate logistic regression.Thirty-three (2.2%) patients developed febrile infection. The combination antibiotic prophylaxis could significantly decrease the rate of PBI than FQ monotherapy (1.0% vs 4.0%, P = .000). The infection rate of the targeted antibiotic group was 1.1%, but there was no significant statistic difference compared with FQ alone (P = .349). Escherichia coli was the most predominant pathogen causing infection. Rectal swab revealed as high as 47.1% and 36.0% patients harbored FQ resistant and ESBL-producing organisms, respectively. In univariate analysis, overweight (BMI between 25 and 28 kg/m), obesity (BMI > 28 kg/m), diabetes were picked out as potential risk factors. Obesity remained as risk factor (OR = 12.827, 95% CI: 0.983-8.925, P = .001) while overweight and diabetes were close to significance (P = .052, .053, respectively).The combined cephalosporin with FQ prophylaxis could significantly decrease the risk of infectious complications. Obesity was an independent risk factor for PBI.
[Mh] Termos MeSH primário: Antibacterianos/uso terapêutico
Antibioticoprofilaxia
Obesidade/complicações
Próstata/cirurgia
Prostatite/prevenção & controle
[Mh] Termos MeSH secundário: Adulto
Idoso
Idoso de 80 Anos ou mais
Biópsia/efeitos adversos
Cefalosporinas/uso terapêutico
China
Fluoroquinolonas/uso terapêutico
Seres Humanos
Infecção/etiologia
Masculino
Meia-Idade
Prostatite/etiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; OBSERVATIONAL STUDY
[Nm] Nome de substância:
0 (Anti-Bacterial Agents); 0 (Cephalosporins); 0 (Fluoroquinolones)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:180306
[St] Status:MEDLINE
[do] DOI:10.1097/MD.0000000000009549


  5 / 126669 MEDLINE  
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[PMID]:29505529
[Au] Autor:Yue H; Xu Q; Xie S
[Ad] Endereço:Department of Neurosurgery, Jinan Central Hospital Affiliated to Shandong University, Jinan.
[Ti] Título:High EMP3 expression might independently predict poor overall survival in glioblastoma and its expression is related to DNA methylation.
[So] Source:Medicine (Baltimore);97(1):e9538, 2018 Jan.
[Is] ISSN:1536-5964
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:In this study, we analyzed the prognostic value of epithelial membrane protein 3 (EMP3) in terms of overall survival (OS) in glioblastoma multiforme (GBM) and the association between its expression and DNA methylation.Bioinformatic analysis was performed by using data from the Cancer Genome Atlas (TCGA) database.EMP3 expression was markedly higher in GBM tissues than in normal brain tissues. High EMP3 expression was associated with significantly worse OS in patients with GBM. Univariate and multivariate analysis showed that EMP3 expression was an independent prognostic factor of poor OS no matter converting its expression into categorical variables (Hazard Ratio [HR] = 1.359, 95%CI: 1.118-1.652, P = .002) or setting it as a continuous variable (HR = 1.178, 95%CI: 1.101-1.260, P < .001). Among different subtypes of GBM, proneural subtype had the lowest EMP3 expression. The lowest EMP3 expression was observed in cluster 5 DNA methylation, which all belong to G-CIMP phenotype. Regression analysis confirmed a moderate negative correlation between EMP3 expression and its DNA methylation (Pearson's r = -0.61).Based on these findings, we infer that high EMP3 expression might be an independent indicator of unfavorable OS in GBM. EMP3 expression might be repressed by DNA methylation.
[Mh] Termos MeSH primário: Neoplasias Encefálicas/metabolismo
Glioblastoma/metabolismo
Glicoproteínas de Membrana/metabolismo
[Mh] Termos MeSH secundário: Idoso
Neoplasias Encefálicas/mortalidade
Estudos de Casos e Controles
China/epidemiologia
Ilhas de CpG
Metilação de DNA
Feminino
Glioblastoma/mortalidade
Seres Humanos
Masculino
Meia-Idade
[Pt] Tipo de publicação:JOURNAL ARTICLE; OBSERVATIONAL STUDY
[Nm] Nome de substância:
0 (EMP3 protein, human); 0 (Membrane Glycoproteins)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:180306
[St] Status:MEDLINE
[do] DOI:10.1097/MD.0000000000009538


  6 / 126669 MEDLINE  
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[PMID]:29505527
[Au] Autor:Zhong H; Wang X; Yang L; Miao L; Ji G; Fan Z
[Ad] Endereço:The Medical Center for Digestive Diseases, The Second Affiliated Hospital of Nanjing Medical University.
[Ti] Título:Modified transprepancreatic septotomy reduces postoperative complications after intractable biliary access.
[So] Source:Medicine (Baltimore);97(1):e9522, 2018 Jan.
[Is] ISSN:1536-5964
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:This study aimed to assess the clinical value of transprepancreatic septotomy indwelling guide wire or pancreatic duct stent in intractable endoscopic retrograde cholangiopancreatography (ERCP) for bile duct cannulation.Of the 2107 patients treated by ERCP, a total of 81 cases with difficult bile duct cannulation underwent transprebiliopancreatic septotomy (referred to as the septotomy group, 37 cases) and transprepancreatic septotomy with pancreatic duct stent (modified septotomy group, 44 cases). Success rates of cannulation and postoperative complications for both methods were compared.Among them, 77 cases were successfully administered bile duct cannulation. The success rates of the septotomy and modified septotomy groups were 91.89% and 97.73%, respectively, with no significant difference (P = .489). Of the 77 patients, 12 cases had complications. The septotomy group included 7 acute pancreatitis, 1 bleeding, and 1 biliary tract infection cases; while in the modified septotomy group, there were 1 acute pancreatitis, 1 bleeding, and 1 biliary tract infection cases. The occurrence rate of acute pancreatitis in the modified septotomy group was lower than that of the septotomy group (2.33% vs 20.59%) with a significant difference (P = .026).These findings indicate that transprepancreatic septotomy with pancreatic duct stent seems to be a safe and feasible operation with reducing complication rates.
[Mh] Termos MeSH primário: Procedimentos Cirúrgicos do Sistema Biliar/estatística & dados numéricos
Colangiopancreatografia Retrógrada Endoscópica/métodos
[Mh] Termos MeSH secundário: Adulto
Idoso
Idoso de 80 Anos ou mais
Procedimentos Cirúrgicos do Sistema Biliar/efeitos adversos
Procedimentos Cirúrgicos do Sistema Biliar/instrumentação
Cateterismo/estatística & dados numéricos
China/epidemiologia
Colangiopancreatografia Retrógrada Endoscópica/efeitos adversos
Colangiopancreatografia Retrógrada Endoscópica/estatística & dados numéricos
Feminino
Seres Humanos
Masculino
Meia-Idade
Complicações Pós-Operatórias/epidemiologia
Complicações Pós-Operatórias/etiologia
Stents
Adulto Jovem
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; OBSERVATIONAL STUDY
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:180306
[St] Status:MEDLINE
[do] DOI:10.1097/MD.0000000000009522


  7 / 126669 MEDLINE  
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[PMID]:29505523
[Au] Autor:Kang X; Zeng Y; Liang J; Li J; Ren D; Chai L; Sun Z; Yu S; Wu X; Han W; Wang W
[Ad] Endereço:Department of Dermatology.
[Ti] Título:Aberrations and clinical significance of BRAF in malignant melanoma: A series of 60 cases in Chinese Uyghur.
[So] Source:Medicine (Baltimore);97(1):e9509, 2018 Jan.
[Is] ISSN:1536-5964
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Malignant melanoma (MM) is a highly malignant melanocytic tumor, it occurs mostly in the skin, the mucous membrane close to the skin, but also in the tunicae rhagoides and the pia mater. The Uyghur is the largest ethnic group living in the Xinjiang Uyghur Autonomous Region of China, accounting for 46% of the total population of 20 million. Large-scale studies on MMs in Asian countries are limited. This study aimed to investigate BRAF mRNA expression and mutations in Chinese Uyghur patients with MMs and to identify the clinical features associated with these parameters.Formalin-fixed, paraffin wax-embedded tumor sections from 60 MMs were analyzed for BRAF expression using reverse transcription polymerase chain reaction (RT-PCR). Exons 11 and 15 of BRAF were analyzed for the presence of mutations using PCR and DNA sequencing. Sixty MMs were followed by mobile phone for survival analysis.BRAF mRNA expression was higher in MMs than in pigmented moles and normal skin tissues. Fourteen of 60 MMs had BRAF mutations. The frequency of BRAF mutations was significantly higher in patients younger than 60 years (10/28, 4/32, P = .02). A significant difference was observed in the frequency of BRAF mutations among specimens of mucosal, acral, chronic sun-induced damage (CSD), and non-CSD MMs (2/10, 3/19, 8/25, 1/6, P = .002). No significant association was found among BRAF mutations, sex, ulceration, or lymph node metastasis. MMs lymph node metastasis (hazard ratio 2.54 [95% confidence interval 1.062 - 6.066], P = .01) affected survival.This study indicated that BRAF mutations and expression might serve as independent adverse prognostic factors in melanoma.
[Mh] Termos MeSH primário: Melanoma/genética
Proteínas Proto-Oncogênicas B-raf/genética
Neoplasias Cutâneas/genética
[Mh] Termos MeSH secundário: Idoso
Grupo com Ancestrais do Continente Asiático/genética
China/epidemiologia
Feminino
Seres Humanos
Masculino
Melanoma/metabolismo
Melanoma/mortalidade
Meia-Idade
Mutação
Proteínas Proto-Oncogênicas B-raf/metabolismo
Neoplasias Cutâneas/metabolismo
Neoplasias Cutâneas/mortalidade
Análise de Sobrevida
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
EC 2.7.11.1 (BRAF protein, human); EC 2.7.11.1 (Proto-Oncogene Proteins B-raf)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:180306
[St] Status:MEDLINE
[do] DOI:10.1097/MD.0000000000009509


  8 / 126669 MEDLINE  
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[PMID]:29472190
[Au] Autor:Gostin LO
[Ad] Endereço:Georgetown University Law Center, Washington, DC, USA.
[Ti] Título:China's "new" silk road.
[So] Source:BMJ;360:k816, 2018 02 22.
[Is] ISSN:1756-1833
[Cp] País de publicação:England
[La] Idioma:eng
[Mh] Termos MeSH primário: Saúde Global
Reforma dos Serviços de Saúde
Cooperação Internacional
[Mh] Termos MeSH secundário: China
Seres Humanos
[Pt] Tipo de publicação:EDITORIAL
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:180224
[St] Status:MEDLINE
[do] DOI:10.1136/bmj.k816


  9 / 126669 MEDLINE  
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[PMID]:29466354
[Au] Autor:Duan W; He B; Chen Y; Zou S; Wang Y; Nover D; Chen W; Yang G
[Ad] Endereço:State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences (CAS), Urumqi, Xinjiang, China.
[Ti] Título:Identification of long-term trends and seasonality in high-frequency water quality data from the Yangtze River basin, China.
[So] Source:PLoS One;13(2):e0188889, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Comprehensive understanding of the long-term trends and seasonality of water quality is important for controlling water pollution. This study focuses on spatio-temporal distributions, long-term trends, and seasonality of water quality in the Yangtze River basin using a combination of the seasonal Mann-Kendall test and time-series decomposition. The used weekly water quality data were from 17 environmental stations for the period January 2004 to December 2015. Results show gradual improvement in water quality during this period in the Yangtze River basin and greater improvement in the Uppermost Yangtze River basin. The larger cities, with high GDP and population density, experienced relatively higher pollution levels due to discharge of industrial and household wastewater. There are higher pollution levels in Xiang and Gan River basins, as indicated by higher NH4-N and CODMn concentrations measured at the stations within these basins. Significant trends in water quality were identified for the 2004-2015 period. Operations of the three Gorges Reservoir (TGR) enhanced pH fluctuations and possibly attenuated CODMn, and NH4-N transportation. Finally, seasonal cycles of varying strength were detected for time-series of pollutants in river discharge. Seasonal patterns in pH indicate that maxima appear in winter, and minima in summer, with the opposite true for CODMn. Accurate understanding of long-term trends and seasonality are necessary goals of water quality monitoring system efforts and the analysis methods described here provide essential information for effectively controlling water pollution.
[Mh] Termos MeSH primário: Estações do Ano
Qualidade da Água
[Mh] Termos MeSH secundário: China
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[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:180222
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0188889


  10 / 126669 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



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