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Camellia sinensis

Dan Chen, Guijie Chen, Peng Wan, Bing Hu, Ligen Chen, Shiyi Ou, Xiaoxiong Zeng, Hong Ye
In the present study, digestion under saliva, simulated gastric and small intestinal conditions and fermentation in vitro of polysaccharides from the flowers of Camellia sinensis (TFPS) by human gut microbiota were investigated. The results indicated that human saliva and simulated gastric and intestinal juices had no effect on TFPS, while TFPS could be utilized by human fecal microbiota, which was proved from the decreased molecular weight and lower content of total or reducing sugars after fermentation under anaerobic conditions...
November 16, 2017: Food & Function
Madelein D Pardau, Andreia S P Pereira, Zeno Apostolides, June C Serem, Megan J Bester
Ilex guayusa tea preparations are now commercially available as Runa tea. Little is known regarding the antioxidant and anti-inflammatory bioactivities of this tea. The I. guayusa teas had a total polyphenolic content between 54.39 and 67.23 mg GAE per g dry mass and peroxyl radical scavenging capacities between 1773.41 and 2019 μmol TE per g dry mass, nearly half of that for the Camellia sinensis teas. The I. guayusa teas afforded 60-80% protection from oxidative stress in the Caco-2 cellular antioxidant assay, comparable to the C...
November 14, 2017: Food & Function
Umran Seven Erdemir, Seref Gucer
In this study, the total contents, leachability into tea infusions, and bioaccessibility of lithium from black, Earl Grey, and green teas were evaluated by inductively coupled plasma mass spectrometry. Leachabilities were evaluated after infusion for 2, 5, or 10min. Bioaccessibility was determined in vitro under simulated stomach and intestinal digestion conditions. Addition of lemon juice, sugar, or milk for consumption, and calcium, tannic acid, and citric acid as additives were evaluated to determine if they affected bioaccessibility of lithium from black tea...
April 1, 2018: Food Chemistry
Teresa Röhrig, Olga Pacjuk, Silvia Hernández-Huguet, Johanna Körner, Katharina Scherer, Elke Richling
Background: Phosphodiesterases (PDEs) play a major role in the regulation of cyclic adenosine monophosphate (cAMP)- and cyclic guanosine monophosphate (cGMP)-mediated pathways. Their inhibitors exhibit anti-inflammatory, vasodilatory and antithrombotic effects. Therefore, consumption of foods with PDE-inhibiting potential may possess beneficial influence on the risk of cardiovascular diseases. Methods: Four plant extracts (Arbutus unedo, Camellia sinensis, Cynara scolymus, Zingiber officinale) with promising ingredient profiles and physiological effects were tested for their ability to inhibit cAMP-specific PDE in vitro in a radioactive assay...
November 4, 2017: Medicines (Basel, Switzerland)
Yu Wang, Kai Fan, Jing Wang, Zhao-Tang Ding, Hui Wang, Cai-Hong Bi, Yun-Wei Zhang, Hai-Wei Sun
Drought is a crucial limiting factor for tea yield and quality. To systematically characterize the molecular response of tea plants to drought stress and its capacity to recover, we used iTRAQ-based comparative proteomic approach to investigate the effects of drought on protein expression profiles in tea seedlings subjected to different drought treatments. A total of 3274 proteins were identified, of which 2169 and 2300 showed differential expressions during drought and recovery, respectively. Functional annotation showed that multiple biological processes were regulated, suggesting that tea plants probably employed multiple and synergistic resistance mechanisms in dealing with drought stress...
October 20, 2017: Journal of Plant Physiology
Sabrina Bimonte, Marco Cascella, Vincenzo Schiavone, Farrokh Mehrabi-Kermani, Arturo Cuomo
Neuropathic pain (NP) is a complex and chronic disease caused by lesions or defects of the somatosensory nervous system. The treatments normally used for managing NP usually lack efficacy. Several animal models of NP have been engineered in order to understand the molecular mechanisms underlying NP and to find alternative molecules to use as new therapeutic agents. Preclinical in vivo studies identified the epigallocatechin-3-gallate (EGCG), a main active component of green tea (Camellia sinensis), as a possible therapeutic molecule for NP treatment due to its anti-inflammatory and antioxidant properties...
2017: Drug Design, Development and Therapy
Jia Li, Jinjie Hua, Qinghua Zhou, Chunwang Dong, Jinjin Wang, Yuliang Deng, Haibo Yuan, Yongwen Jiang
As important biomolecules in Camellia sinensis L., lipids undergo substantial changes during black tea manufacture, which is considered to contribute to tea sensory quality. However, limited by analytical capacity, detailed lipid composition and its dynamic changes during black tea manufacture remain unclear. Herein, we performed tea lipidome profiling using high resolution liquid chromatography coupled to mass spectrometry (LC-MS), which allows simultaneous and robust analysis of 192 individual lipid species in black tea, covering 17 (sub)classes...
November 7, 2017: Journal of Agricultural and Food Chemistry
Diana Jose, N Lekshmi, A K Goel, R Ajay Kumar, Sabu Thomas
Vibrio cholerae, a causative agent of the waterborne disease cholera, still threatens a large proportion of world's population. The role of biofilm formation in V. cholerae pathogenesis is well established, as it provides the bacterium enhanced tolerance to antimicrobial agents and increased transmission. In the present study, four medicinal plants used in traditional medicines with antidiarrheal properties were evaluated for its antibiofilm activity. Methanol extracts of these plants (Centella asiatica, Elephantopus scaber, Camellia sinensis, and Holarrhena antidysenterica) showed promising antibiofilm activity against V...
October 20, 2017: Journal of Food Protection
Anburaj Jeyaraj, Shengrui Liu, Xiao Zhang, Ran Zhang, Mingzhu Shangguan, Chaoling Wei
The tea plant (Camellia sinensis L.) is vulnerable to the geometrid Ectropis oblique; although microRNAs (miRNAs) are important for plant growth, development and stress response, the function of miRNAs in the response of C. sinensis to stress from E. oblique is unclear. To identify E. oblique stress-responsive miRNAs and their target genes in tea plant, three small RNA libraries were constructed from leaves subjected to mechanical wounding (MW), geometrid attack (GA) and from healthy control (CK) leaves. Using high-throughput sequencing, 130 known miRNAs and 512 novel miRNAs were identified; of these, differential expression under GA stress was observed for 36 known and 139 novel miRNAs...
October 19, 2017: Scientific Reports
Carmen Garcia-Jares, Marta Sanchez-Nande, Juan Pablo Lamas, Marta Lores
Camellia (genus of flowering plants of fam. Theaceae) is one of the main crops in Asia, where tea and oil from leaves and seeds have been utilized for thousands of years. This plant is excellently adapted to the climate and soil of Galicia (northwestern Spain) and northern Portugal where it is grown not only as an ornamental plant, but to be evaluated as a source of bioactive compounds. In this work, the main fatty acids were extracted from Camellia seeds of four varieties of Camellia: sasanqua, reticulata, japonica and sinensis, by means of matrix-solid phase dispersion (MSPD), and analyzed by gas chromatography (GC) with MS detection of the corresponding methyl esters...
October 17, 2017: Bioengineering
Wuyi Liu, Fariba Rouzmehr, Alireza Seidavi
This study has evaluated the possible effect of waste powder of green tea (Camellia sinensis) in feed supplementation on the growth performance, carcass characteristics, blood parameters, and lipid metabolites of growing broilers (chicks) in both the amount and duration aspects of dietary additives during the finisher phases. In the experiment, growth performance, carcass characteristics, blood parameters, and lipid metabolites of broiler chicks have been fully recorded and explored. The diet of 271 day-old Ross 308 male broiler chicks has been supplemented with 0, 0...
October 16, 2017: Environmental Science and Pollution Research International
Mei-Ya Liu, Asdrubal Burgos, Lifeng Ma, Qunfeng Zhang, Dandan Tang, Jianyun Ruan
BACKGROUND: Nitrogen (N) plays an important role in the formation of tea quality-related compounds, like amino acids and flavor/aroma origin compounds. Lipids, which have been reported to be affected by N deficiency, are precursors to the generation of flavor/aroma origin compounds in tea plant. However, there is no literature about the lipid profiles of tea plant affected by N fertilization. Hence, we hypothesize that the biosynthesis of flavor-related compounds in tea was affected by N through its regulation of lipid metabolism...
October 16, 2017: BMC Plant Biology
Jefferson Menezes, Ben-Hur Neves, Mauren Souza, Pâmela Billig Mello-Carpes
Maternal deprivation (MD) in early life affects the development of the brain, causing cognitive losses in adulthood. Oxidative imbalance may be one of the factors that trigger these deficits. Therapies with antioxidant components, like green tea from Camellia sinensis (GT) has been used to treat or prevent memory deficits in a variety of conditions related to oxidative stress. Here we demonstrate that memory deficits caused by MD can be prevented by GT antioxidant activity in hippocampus. Pregnant female rats were used...
December 1, 2017: Physiology & Behavior
Masoumeh Safari, Faezeh Ghanati, Mohammad Reza Safarnejad, Najmeh Ahmadian Chashmi
Treatment with aluminum triggers a unique response in tea seedlings resulting in biochemical modification of the cell wall, regulation of the activity of the loosening agents, and elongation of root. Unlike most terrestrial plants, tea (Camellia sinensis L.) responds to aluminum (Al) through the promotion of its root elongation; but the real mechanism(s) behind this phenomenon is not well understood. A plausible relationship between the modifications of the cell wall and the promotion of root elongation was examined in tea seedlings treated for 8 days with 400 µM Al...
October 11, 2017: Planta
Wanying Gong, Huang Yewei, Aibing Ji, Wenshu Peng, Cong Liu, Ying Zeng, Ruijuan Yang, Liang Yan, Xuanjun Wang, Jun Sheng
BACKGROUND: The Camellia sinensis var. assamica seed cake (by-product of tea-seed oil) is an abundant resource with poor utilization. The C. sinensis var. assamica seed saponin (CSS) is one kind of nonionic surfactant. In this study, The CSS extraction conditions were optimized by response surface methodology (RSM) and then the CSS detergent was developed. Additionally, the safety and decontamination ability of the developed detergent were evaluated. RESULTS: The optimized extraction conditions were including the extracting temperature of 40...
October 9, 2017: Journal of the Science of Food and Agriculture
Ling-Yan Jia, Xue-Jin Wu, Ying Gao, Gary O Rankin, Alexa Pigliacampi, Heather Bucur, Bo Li, You-Ying Tu, Yi Charlie Chen
Ovarian cancer is regarded as one of the most severe malignancies for women in the world. Death rates have remained steady over the past five decades, due to the undeniable inefficiency of the current treatment in preventing its recurrence and death. The development of new effective alternative agents for ovarian cancer treatment is becoming increasingly critical. Tea saponins (TS) are triterpenoidsaponins composed of sapogenins, glycosides, and organic acids, which possess a variety of pharmacological activities, and have shown promise in the anti-cancer field...
September 30, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Lanting Zeng, Yinyin Liao, Jianlong Li, Ying Zhou, Jinchi Tang, Fang Dong, Ziyin Yang
Herbivore-induced plant volatiles (HIPVs) act as direct defenses against herbivores and as indirect defenses by attracting herbivore enemies. However, the involvement of HIPVs in within-plant or plant-to-plant signaling is not fully clarified. Furthermore, in contrast to model plants, HIPV signaling roles in crops have hardly been reported. Here, we investigated HIPVs emitted from tea (Camellia sinensis) plants, an important crop used for beverages, and their involvement in tea plant-to-plant signaling. To ensure uniform and sufficient exposure to HIPVs, jasmonic acid combined with mechanical damage (JAMD) was used to simulate herbivore attacks...
November 2017: Plant Science: An International Journal of Experimental Plant Biology
Guo-Feng Liu, Jing-Jing Liu, Zhi-Rong He, Fu-Min Wang, Huang Yang, Yi-Feng Yan, Ming-Jun Gao, Margaret Y Gruber, Xiao-Chun Wan, Shu Wei
Volatile terpenoids produced in tea plants (Camellia sinensis) are airborne signals interacting against other ecosystem members, but also pleasant odorants of tea products. Transcription regulation (including transcript processing) is pivotal for plant volatile terpenoid production. In this study, a terpene synthase gene CsLIS/NES was recovered from tea plants (C. sinensis cv. 'Long-Men Xiang'). CsLIS/NES transcription regulation resulted in two splicing forms: CsLIS/NES-1 and CsLIS/NES-2 lacking a 305 bp-fragment at N-terminus, both producing (E)-nerolidol and linalool in vitro...
September 29, 2017: Plant, Cell & Environment
Mohammad Hosein Farzaei, Zahra Shahpiri, Roodabeh Bahramsoltani, Marjan Moghaddam Nia, Fariba Najafi, Roja Rahimi
Multiple sclerosis (MS) is a chronic inflammatory and demyelinating disorder of the central nervous system (CNS) that can cause cognition, mobility, and sensory impairments. It is considered one of the most common non-traumatic causes of disability in the world. The aim of the present article was to review the clinical evidence related to medicinal plants in the management of MS symptoms. Electronic databases, including the Cochrane Library, Pubmed, and Scopus, were searched for entries from 1966 to February 2017...
October 2017: CNS Drugs
Chuang Zhu, Ling-Ling Tai, Xiao-Chun Wan, Da-Xiang Li, Yong-Qing Zhao, Yan Xu
CONTEXT: Tea (Camellia sinensis (L.) Kuntze [Theaceae]) is used to induce urination and inducing nervous excitation. Green and black teas have multifarious physiological functions. The different effects of green and black tea aqueous extracts (GTEs and BTEs) on hyperuricemia are not definitely reported. OBJECTIVE: The different effects of GTEs and BTEs on lowering serum uric acid (UA) in hyperuricemic mice were determined. MATERIALS AND METHODS: Kunming mice were divided into nine groups (n = 6/each group)...
December 2017: Pharmaceutical Biology
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