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Camellia sinensis

Jânio S Santos, Carolina T P Deolindo, Jessica F Hoffmann, Fabio C Chaves, Leonardo do Prado-Silva, Anderson S Sant'Ana, Luciana Azevedo, Mariana Araújo Vieira do Carmo, Daniel Granato
A statistical optimization study was conducted to obtain a tea containing fermented rooibos (Aspalathus linearis), white tea (Camellia sinensis var. sinensis), and roasted mate (Ilex paraguariensis). An optimal combination of these species was proposed. This optimized tea inhibited 64% the lipoperoxidation in vitro and presented a high phenolic content, especially kaempferol, (+)-catechin, (-)-epicatechin, rutin, (-)-epigallocatechin, and (-)-epicatechin-2-O-gallate. Indeed, the antioxidant effect was confirmed by decreasing 30% the reactive oxygen species generation in human hepatoma carcinoma cells (HepG2, 100 and 240 µg/mL)...
July 15, 2018: Food Chemistry
Fen Zhang, Yuan Liu, Liyuan Wang, Peixian Bai, Li Ruan, Chengcai Zhang, Kang Wei, Hao Cheng
Ammonium is a major inorganic nitrogen source for tea plant growth and is mainly taken up and transported by ammonium transporters (AMTs). Here, we analyzed the NH4 + uptake kinetics of three tea cultivars, Longjing43 (LJ43), Zhongcha108 (ZC108) and Zhongcha302 (ZC302). The results revealed that ZC302 had a higher NH4 + uptake efficiency than the other two cultivars. The full CDS sequences of three Camellia sinensis ammonium transporter (CsAMT) genes, i.e., CsAMT1.1, CsAMT1.2 and CsAMT3.1, were cloned. Analysis of tissue-specific expression showed that CsAMT1...
March 10, 2018: Gene
H J C de Vries, M Soltanipoor, S Kezic, C E Vergunst
Camellia sinensis extract/Sinecatechins/10% ointment is a registered topical therapy for the treatment of external and perianal genital warts, to be applied thrice daily. Pharmacokinetic studies elucidating the most optimal frequency of application have not been undertaken, and a less frequent (more convenient) application schedule might also be effective. Here, we measured epigallocatechin gallate (EGCG) concentrations, the main Camellia sinensis extract component, in the stratum corneum (SC) over time after one application...
March 10, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
Riveka Rani, Saroj Arora, Jeevanjot Kaur, Rajesh Kumari Manhas
BACKGROUND: Oxidative stress in an intracellular environment created by the accumulation of reactive oxygen species results in oxidative damage to biomolecules which ultimately become a hallmark for severe diseases like cancer, aging, diabetes, and cardiovascular and neurodegenerative diseases. METHODS: Various in vitro assays were employed to assess the antioxidant potential of strain, DNA protective activity was demonstrated using DNA nicking assay and cytotoxicity of the extract was evaluated using MTT assay...
March 9, 2018: BMC Complementary and Alternative Medicine
Mina Cheraghi Nirumand, Marziyeh Hajialyani, Roja Rahimi, Mohammad Hosein Farzaei, Stéphane Zingue, Seyed Mohammad Nabavi, Anupam Bishayee
Kidney stones are one of the oldest known and common diseases in the urinary tract system. Various human studies have suggested that diets with a higher intake of vegetables and fruits play a role in the prevention of kidney stones. In this review, we have provided an overview of these dietary plants, their main chemical constituents, and their possible mechanisms of action. Camellia sinensis (green tea), Rubus idaeus (raspberry), Rubia cordifolia (common madder), Petroselinum crispum (parsley), Punica granatum (pomegranate), Pistacia lentiscus (mastic), Solanum xanthocarpum (yellow-fruit nightshade), Urtica dioica (stinging nettle), Dolichos biflorus ( horse gram ), Ammi visnaga (khella), Nigella sativa (black-cumin), Hibiscus sabdariffa (roselle), and Origanum vulgare (oregano) have received considerable interest based on scientific evidence...
March 7, 2018: International Journal of Molecular Sciences
I Hafiz, H N Bhatti, M A Hanif, M Shahid
Herbs and plants are mostly used as antimicrobials and antioxidants owing to the harmfulness and linked side-effects of synthetic chemical constituents. Plants and spices produce various metabolites with antibacterial and antioxidant potential. These metabolites are principally revealed as encouraging healing components or mediators which control ailments in human beings. The present study was aimed to characterize the extracts from selected medicinal plants through in-vitro activities. Winged prickly ash, green tea and thyme were selected and extracted through ethanol and methanol solutions...
January 2018: Journal of Biological Regulators and Homeostatic Agents
M Wang, F Liu, P W Crous, L Cai
Species of Nigrospora commonly occur as plant pathogens, endophytes or saprobes, and have been shown to be extremely interesting for the discovery of novel metabolites. The familial placement, as well as phylogenetic relationships among Nigrospora species remain ambiguous. In this study, Nigrospora (= Khusia ) is confirmed as a monophyletic genus belonging to Apiosporaceae ( Xylariales ), based on a phylogeny inferred from LSU sequence data. A multi-locus phylogeny based on ITS, TEF1-α and TUB2 , in conjunction with morphological characters, host associations, and ecological data was employed for species delimitation in Nigrospora , as well as identification of 165 recently collected isolates from China, and three from Europe...
December 2017: Persoonia
Yong-Xin Wang, Zhi-Wei Liu, Zhi-Jun Wu, Hui Li, Wen-Li Wang, Xin Cui, Jing Zhuang
GRAS proteins are important transcription factors that play multifarious roles in regulating the growth and development as well as stress responses of plants. Tea plant is an economically important leaf -type beverage crop. Information concerning GRAS family transcription factors in tea plant is insufficient. In this study, 52 CsGRAS genes encoding GRAS proteins were identified from tea plant genome database. Phylogenetic analysis of the identified GRAS proteins from tea plant, Arabidopsis, and rice divided these proteins into at least 13 subgroups...
March 2, 2018: Scientific Reports
Avijit Dey, Antony Gomes, Subir Chandra Dasgupta
Background: Tea ( Camellia sinensis ) being the most widely drank beverage and despite having numerous beneficial role toward health and disease, its safety evaluation during pregnancy and prenatal, postnatal developmental period need to be monitored. Objective: This study was to evaluate the toxicity of black tea extract (BTE) in experimental pregnant rats and on their pups during prenatal and postnatal developmental periods. Materials and Methods: Pregnant female (120 ± 10 g) Wister albino rats were chosen for this study...
January 2018: Pharmacognosy Magazine
Karthikeyan Alagarsamy, Lubobi Ferdinand Shamala, Shu Wei
Background: Camellia sinensis var. sinensis is widely grown for tea beverages that possess significant health promoting effects. Studies on tea plant genetics and breeding are hindered due to its recalcitrance to Agrobacterium -mediated genetic transformation. Among the possible reasons, oxidation of phenolics released from explant tissues and bactericidal effects of tea polyphenols during the process of transformation play a role in the plant recalcitrance. The aim of the present study was to alleviate the harmful effects of phenolic compounds using in - planta transformation...
2018: Plant Methods
Muhammad Naveed, Jannat BiBi, Asghar Ali Kamboh, Imran Suheryani, Ihsanullah Kakar, Sarfaraz Ali Fazlani, Xia FangFang, Shahmir Ali Kalhoro, Liang Yunjuan, Mohib Ullah Kakar, Mohamed E Abd El-Hack, Ahmed E Noreldin, Shi Zhixiang, Chen LiXia, Zhou XiaoHui
Medicinal plants are essential parts of traditional medicine due to their phytochemical constituents having pharmacological values and therapeutic applications. Black tea have thousands of various biological compounds such as flavonoids (Thearubigins (TRs) and theaflavins (TFs) and catechins), amino acids (L.theanine), vitamins (A, C, K), phenolic acids (caffeic acid (CA), gallic acid (GA), chlorogenic acids (CGA) and cauramic acid), lipids, proteins, volatile compounds carbohydrates, β-carotene and fluoride that illustrated many promising pharmacological effects regarded as growth promoter, cardioprotector, potent cholesterol-lowering effect, antioxidant and antimicrobial, etc inhuman...
February 23, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Yueyue Tian, Yunhe Zhao, Lixia Zhang, Wei Mu, Zhengqun Zhang
The tea green leafhopper, Empoasca onukii Matsuda (Hemiptera: Cicadellidae), is an economically important pest of tea crops, Camellia sinensis (L.) O. Kuntze (Ericales: Theaceae), in China. The morphological, physiological, and biochemical changes of two tea cultivars, the normal green tea cultivar 'Fudingdabai' and the novel chlorophyll-deficient albino cultivar 'Huangjinya', infested by E. onukii were investigated to determine the tolerance of different tea cultivars to E. onukii attack. E.onukii infestation affected the growth of tea plants, and decreased the shoot length, leaf area, leaf thickness, and stem diameter...
February 20, 2018: Journal of Economic Entomology
Dan-Dan Tian, Joshua J Kellogg, Neşe Okut, Nicholas H Oberlies, Nadja B Cech, Danny D Shen, Jeannine S McCune, Mary F Paine
Green tea ( Camellia sinensis ) is a popular beverage worldwide, raising concern for adverse interactions when co-consumed with conventional drugs. Like many botanical natural products, green tea contains numerous polyphenolic constituents that undergo extensive glucuronidation. As such, the UDP-glucuronosyltransferases (UGTs), particularly intestinal UGTs, represent potential 'first-pass' targets for green tea-drug interactions. Candidate intestinal UGT inhibitors were identified using a biochemometrics approach, which combines bioassay and chemometric data...
February 21, 2018: Drug Metabolism and Disposition: the Biological Fate of Chemicals
Ju Hee Choi, Jin-Yong Kim, Eun Tak Jeong, Tae Ho Choi, Tae Mi Yoon
The purpose of this study was to investigate the applicability of green tea seed (GTS) extract as a natural preservative in food. Food preservative ability and mutagenicity studies of GTS extract and identification of antimicrobial compounds from GTS extract were carried out. The GTS extract showed only anti-yeast activity against Candida albicans with MIC value of 938μg/mL and Zygosaccharomyces rouxii with a MIC of 469μg/mL. The active compounds were identified as theasaponin E1 (1), assamsaponin A (2), and assamsaponin B (3)...
March 2018: Food Research International
Minxuan Wang, Yongjie Zhang
Tea is one of the most popular drinks in the world, but counterfeit or adulterated tea can be found now and then on the tea market. The traditional methods dependent on sensory, physical and chemical tests cannot identify the composition of adulterated plant species accurately. We developed therefore a method for identification of adulterated plants in tea based on qualitative detection of plant rbcL (Ribulose 1,5-bisphosphate carboxylase-oxygenase large subunit) fragments, which involved amplification, sequencing and sequence analyses of rbcL fragments...
February 25, 2018: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
Jiazhi Shen, Zhongwei Zou, Xuzhou Zhang, Lin Zhou, Yuhua Wang, Wanping Fang, Xujun Zhu
Purple-leaf tea plants, as anthocyanin-rich cultivars, are valuable materials for manufacturing teas with unique colors or flavors. In this study, a new purple-leaf cultivar "Zixin" ("ZX") was examined, and its biochemical variation and mechanism of leaf color change were elucidated. The metabolomes of leaves of "ZX" at completely purple, intermediately purple, and completely green stages were analyzed using ultra-performance liquid chromatography quadrupole time of flight mass spectrometry (UPLC-QTOF-MS). Metabolites in the flavonoid biosynthetic pathway remained at high levels in purple leaves, whereas intermediates of porphyrin and chlorophyll metabolism and carotenoid biosynthesis exhibited high levels in green leaves...
2018: Horticulture Research
Hyang-Gi Ji, Yeong-Ran Lee, Min-Seuk Lee, Kyeong-Hwan Hwang, Clara Yongjoo Park, Eun-Hee Kim, Jun Seong Park, Young-Shick Hong
With increase of tea (Camellia sinensis) consumption, its chemical or metabolite compositions play a crucial role in the determination of tea quality. In general, metabolite compositions of fresh tea leaves including shoots depend on plucking seasons and tea cultivators. Therefore, choosing specific plucking time of tea leaves can provide use-specified tea products. Artificial control of tea growing, typically shade treatments, can lead to significant changes of the tea metabolite compositions of tea. However, metabolic characteristics of tea grown under various shade treatments conditions remain unclear...
February 6, 2018: Journal of Agricultural and Food Chemistry
Yanli Liu, Dan Cao, Linlong Ma, Xiaofang Jin, Pingfang Yang, Fei Ye, Panpan Liu, Ziming Gong, Chaoling Wei
The tea plant is a fluoride hyperaccumulator, and fluoride accumulation in its leaves is closely related to human health. To dissect molecular mechanisms underlying fluoride accumulation/detoxification, the leaves of tea seedlings exposed to different fluoride treatments for 30 days were sampled for physiological and proteomics analyses. The results showed that fluoride had no adverse effects on the growth of tea seedlings in spite of high content fluoride accumulation in their leaves. Through TMT coupled with UPLC MS/MS, 189 differentially accumulated proteins were quantified, of which 41 and 148 were localized in the cell wall and cellular compartments respectively...
February 2, 2018: Journal of Proteomics
Jae-Min Song
Polyphenols including catechins from green tea ( Camellia sinensis ) have been reported to have anti-infective activities against a broad spectrum of viruses and other pathogens. During the last two decades, antiviral activities of catechins with different modes of action have been demonstrated on diverse families of viruses, such as human immunodeficiency virus, Herpes simplex virus, influenza virus, hepatitis B and C virus. In this study, we focused on the antiviral properties of catechins and their derivatives against viral hepatitis which have become a key public health issue due to their serious impact on human health with liver diseases...
January 2018: Clinical and Experimental Vaccine Research
Chung Shu Yang, Hong Wang, Zachary Paul Sheridan
Tea, a popular beverage made from leaves of the plant Camellia sinensis, has been studied extensively in recent decades for its beneficial health effects in the prevention of obesity, metabolic syndrome, diabetes, cancer, and other diseases. Whereas these beneficial effects have been convincingly demonstrated in most laboratory studies, results from human studies have not been consistent. Some studies demonstrated that weight reduction, alleviation of metabolic syndrome and risk reduction in diabetes were only observed in individuals who consume 3-4 cups of tea (600-900 mg tea catechins) or more daily...
January 2018: Journal of Food and Drug Analysis
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