keyword
MENU ▼
Read by QxMD icon Read
search

Camellia sinensis

keyword
https://www.readbyqxmd.com/read/28225779/combined-small-rna-and-degradome-sequencing-reveals-complex-microrna-regulation-of-catechin-biosynthesis-in-tea-camellia-sinensis
#1
Ping Sun, Chunzhen Cheng, Yuling Lin, Qiufang Zhu, Jinke Lin, Zhongxiong Lai
MicroRNAs are endogenous non-coding small RNAs playing crucial regulatory roles in plants. Tea, a globally popular non-alcoholic drink, is rich in health-enhancing catechins. In this study, 69 conserved and 47 novel miRNAs targeting 644 genes were identified by high-throughout sequencing. Predicted target genes of miRNAs were mainly involved in plant growth, signal transduction, morphogenesis and defense. To further identify targets of tea miRNAs, degradome sequencing and RNA ligase-mediated rapid amplification of 5'cDNA ends (RLM-RACE) were applied...
2017: PloS One
https://www.readbyqxmd.com/read/28221885/antibacterial-and-antiadhesive-activities-of-extracts-from-edible-plants-against-soft-drink-spoilage-by-asaia-spp
#2
Hubert Antolak, Agata Czyzowska, Dorota Kregiel
This study was conducted to investigate the antibacterial and antiadhesive activities of ethanol extracts from five edible plant parts: cinnamon bark ( Cinnamomum zeylanicum ), licorice root ( Glycyrrhiza radix ), nettle leaves ( Urtica dioica ), green tea leaves ( Camellia sinensis ), and elderberry flowers ( Sambucus nigra ). The chemical constituents of the extracts were identified using high-performance liquid chromatography and liquid chromatography plus mass spectrometry. Six strains of Asaia lannensis and Asaia bogorensis bacteria isolated from spoiled commercial fruit-flavored noncarbonated mineral water were used...
January 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28220704/functional-characterization-of-a-new-tea-camellia-sinensis-flavonoid-glycosyltransferase
#3
Xianqian Zhao, Peiqiang Wang, Mingzhuo Li, Yeru Wang, Xiaolan Jiang, Lilan Cui, Yumei Qian, Juhua Zhuang, Liping Gao, Tao Xia
Tea (Camellia sinensis) is an important commercial crop, in which the high content of flavonoids provides the health benefits. A flavonoid glycosyltransferase (CsUGT73A20), belonged to Cluster IIIa was isolated from tea plant. The recombinant CsUGT73A20 in E. coli exhibited a broad substrate tolerance towards multiple flavonoids. Among them, kaempferol was the optimal substrate compared to quercetin, myricetin, naringenin, apigenin and kaempferide. However, no product was detected when UDP-galactose was used as the sugar donor...
February 21, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28216091/enantiomeric-and-quantitative-analysis-of-volatile-terpenoids-in-different-teas-camellia-sinensis
#4
Yin Zhu, Chen-Yang Shao, Hai-Peng Lv, Yue Zhang, Wei-Dong Dai, Li Guo, Jun-Feng Tan, Qun-Hua Peng, Zhi Lin
Volatile terpenoids play important roles in the formation of tea aroma quality due to their pleasant scents and low odor thresholds. Most volatile terpenoids contain stereogenic centers, which results in various stereo distributions of their enantiomers and diastereoisomers in different types of tea. However, the distribution characteristics of terpenoid enantiomers in teas were still unclear, which poses an obstacle to the scientific understanding of tea aroma. In this work, a new and efficient analysis approach based on headspace solid phase microextraction (HS-SPME)-chiral gas chromatography-mass spectrometry (GC-MS) was established to analyze 12 pairs of familiar terpenoid enantiomers in different teas...
February 10, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28193425/black-tea-volatiles-fingerprinting-by-comprehensive-two-dimensional-gas-chromatography-mass-spectrometry-combined-with-high-concentration-capacity-sample-preparation-techniques-toward-a-fully-automated-sensomic-assessment
#5
Federico Magagna, Chiara Cordero, Cecilia Cagliero, Erica Liberto, Patrizia Rubiolo, Barbara Sgorbini, Carlo Bicchi
Tea prepared by infusion of dried leaves of Camellia sinensis (L.) Kuntze, is the second world's most popular beverage, after water. Its consumption is associated with its chemical composition: it influences its sensory and nutritional quality addressing consumer preferences, and potential health benefits. This study aims to obtain an informative chemical signature of the volatile fraction of black tea samples from Ceylon by applying the principles of sensomics. In particular, several high concentration capacity (HCC) sample preparation techniques were tested in combination with GC×GC-MS to investigate chemical signatures of black tea volatiles...
June 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28166993/resveratrol-and-epigallocatechin-3-gallate-addition-to-thawed-boar-sperm-improves-in%C3%A2-vitro-fertilization
#6
B Gadani, D Bucci, M Spinaci, C Tamanini, G Galeati
Thawing is one of the most delicate process after semen cryopreservation as spermatozoa pass from a dormant metabolic stage to a sudden awakening in cellular metabolism. The rapid oxygen utilization leads to an overproduction of reactive oxygen species that can damage sperm cells, thus causing a significant decrease of fertilizing potential of frozen-thawed spermatozoa. Resveratrol (Res) is a natural grape-derived phytoalexin and Epigallocatechin-3-gallate (EGCG) is the major polyphenol in green tea (Camellia sinensis); both molecules are known to possess high levels of antioxidant activity...
March 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28163235/proteolysis-of-chloroplast-proteins-is-responsible-for-accumulation-of-free-amino-acids-in-dark-treated-tea-camellia-sinensis-leaves
#7
Yiyong Chen, Xiumin Fu, Xin Mei, Ying Zhou, Sihua Cheng, Lanting Zeng, Fang Dong, Ziyin Yang
: Shade management (dark treatment) on tea (Camellia sinensis) plants is a common approach to improve free amino acids in raw materials of tea leaves. However, the reason for amino acid accumulation in dark-treated tea leaves is still unknown. In the present study, dark treatment significantly increased content of free amino acids and reduced content of soluble proteins in tea leaves. Quantitative proteomics analysis showed that most enzymes involved in biosyntheses of amino acids were down-accumulated by dark treatment...
February 2, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28155600/green-tea-camellia-sinensis-protects-against-arsenic-neurotoxicity-via-antioxidative-mechanism-and-activation-of-superoxide-dismutase-activity
#8
Smarajit Maiti, Nirmallya Acharyya, Tamal K Ghosh, Sk Sajed Ali, Emili Manna, Aarifa Nazmeen, Nirmalya K Sinha
BACKGROUND: Chronic arsenic-exposure even at a low-dose results in the neural impairment and motor/cognitive dysfunction. However, several preventive approaches are made mainly against hepatic/gastrointestinal damages. Only a few investigations postulate therapeutic strategies for neural anomalies. Here, the protective role of Green tea (Camellia sinensis or CS; 10mg/ml aqueous) has been evaluated against arsenic-induced (0.6ppm/100g bw/28 days) cerebral/cerebellar tissue degeneration, oxidative-threats and neurotransmitter deregulation in female rats...
February 1, 2017: Central Nervous System Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/28149496/pseudomoniasis-phytotherapy-a-review-on-most-important-iranian-medicinal-plants-effective-on-pseudomonas-aeruginosa
#9
REVIEW
Mahmoud Bahmani, Mahmoud Rafieian-Kopaei, Hassan Hassanzadazar, Morovat Taherikalani
BACKGROUND AND OBJECTIVES: Pseudomonas aeruginosa is a Gram-negative, aerobic bacterium found in water and soil. It is a normal flora in skin and gastrointestinal tract of human beings. P. aeruginosa as an opportunistic pathogen involved in nosocomial infections having multiple pathogenic factors and shows high rate of resistance to different antibiotics. The aim of this study was to identify the most important native medicinal plants of Iran effective on P. aeruginosa. MATERIALS AND METHODS: All required information was obtained by searching keywords such as P...
October 2016: Iranian Journal of Microbiology
https://www.readbyqxmd.com/read/28133488/protective-effect-of-green-tea-camellia-sinensis-l-kuntze-against-prostate-cancer-from-in-vitro-data-to-algerian-patients
#10
Somia Lassed, Cláudia M Deus, Radja Djebbari, Djamila Zama, Paulo J Oliveira, Albert A Rizvanov, Abderrezak Dahdouh, Fadila Benayache, Samir Benayache
Green tea (GT) has been studied for its effects as antioxidant and cancer-preventive agent. Epidemiological studies showed that GT consumption decreases the risk for prostate cancer (PC). To investigate whether erythrocyte oxidative stress (OS) is associated with PC and whether daily consumption of GT improves the oxidative phenotype, we performed a study in a group of Algerian PC patients, preceded by an in vitro study to characterize composition and antioxidant/antiproliferative activities of the GT used...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28124839/tea-polyphenols-dominate-the-short-term-tea-camellia-sinensis-leaf-litter-decomposition
#11
Dong-Mei Fan, Kai Fan, Cui-Ping Yu, Ya-Ting Lu, Xiao-Chang Wang
Polyphenols are one of the most important secondary metabolites, and affect the decomposition of litter and soil organic matter. This study aims to monitor the mass loss rate of tea leaf litter and nutrient release pattern, and investigate the role of tea polyphenols played in this process. High-performance liquid chromatography (HPLC) and classical litter bag method were used to simulate the decomposition process of tea leaf litter and track the changes occurring in major polyphenols over eight months. The release patterns of nitrogen, potassium, calcium, and magnesium were also determined...
2017: Journal of Zhejiang University. Science. B
https://www.readbyqxmd.com/read/28120305/safety-evaluation-of-fluoride-content-in-tea-infusions-consumed-in-the-azores-a-volcanic-region-with-water-springs-naturally-enriched-in-fluoride
#12
Diana Paula Silva Linhares, Patrícia Ventura Garcia, Leslie Amaral, Teresa Ferreira, Armindo Dos Santos Rodrigues
Tea is the second most commonly consumed beverage in the world. It is well recognized that the consumption of tea in high quantities can promote the development of fluorosis. The main objective of this study is to estimate the exposure to fluoride in the Azores through drinking tea prepared with water from different volcanic locations, by i) investigating the fluoride (F) content of various commercial brands of tea (Camellia sinensis) marketed in Azores and ii) comparing tea releasing rates of F according to brewing time, considering the fluoride concentration in the different types of water used for the infusion...
January 24, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28118673/an-appraisal-of-drug-drug-interactions-with-green-tea-camellia-sinensis
#13
Ahmed A Albassam, John S Markowitz
This review summarizes published in vitro, animal, and clinical studies investigating the effects of green tea (Camellia sinensis) extract and associated catechins on drug-metabolizing enzymes and drug transporters. In vitro studies suggest that green tea extract and its main catechin, (-)-epigallocatechin-3-gallate, to varying degrees, inhibit the activity of CYP1A1, CYP1A2, CYP2B6, CYP2C8, CYP2C9, CYP2D6, and CYP3A4. UGT1A1 and UGT1A4 isoforms were also inhibited by (-)-epigallocatechin-3-gallate. Animal studies suggest green tea extract and/or (-)-epigallocatechin-3-gallate significantly increase the bioavailability of diltazem, verapamil, tamoxifen simvastatin, 5-fluorouracil, and nicardipine...
January 24, 2017: Planta Medica
https://www.readbyqxmd.com/read/28098803/optimization-of-the-production-of-1-phenylethanol-using-enzymes-from-flowers-of-tea-camellia-sinensis-plants
#14
Fang Dong, Ying Zhou, Lanting Zeng, Naoharu Watanabe, Xinguo Su, Ziyin Yang
1-Phenylethanol (1PE) can be used as a fragrance in food flavoring and cosmetic industries and as an intermediate in the pharmaceutical industry. 1PE can be synthesized from acetophenone, and the cost of 1PE is higher than the cost of acetophenone. Therefore, it is important to establish an effective and low-cost approach for producing 1PE. Our previous studies found that tea (Camellia sinensis) flowers, which are an abundant and waste resource, contained enzymes that could transform acetophenone to 1PE. In the present study, we extracted crude enzymes from tea flowers and optimized the production conditions of 1PE using response surface methodology...
January 13, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28095073/preclinical-and-potential-applications-of-common-western-herbal-supplements-as-complementary-treatment-in-parkinson-s-disease
#15
Luke A Morgan, Oliver Grundmann
Parkinson's disease (PD) is a neurological disorder with a complex pathological etiology, which is not fully understood. Progression of PD may be the result of a buildup of iron in the substantia nigra, microglia-mediated neuroinflammation, dysfunctional mitochondria, or abnormal protein handling. Dopamine is the main neurotransmitter affected, but as the disease progresses, a decrease in all the brain's biogenic amines occurs. Current medication used in the treatment of PD aims to prevent the breakdown of dopamine or increase dopaminergic neurotransmission in the central nervous system...
July 4, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28066107/anxiolytic-activity-of-aqueous-extract-of-camellia-sinensis-in-rats
#16
Rajeshwari Shastry, Sheetal Dinkar Ullal, Shreyas Karkala, Seema Rai, Akash Gadgade
OBJECTIVES: The present study was undertaken to evaluate anxiolytic effect of Camellia sinensis (CS) and possible mechanism on acute and chronic administration in rats. MATERIALS AND METHODS: Eight groups of rats with six in each group were used. Group I served as control. Group II received diazepam (1 mg/kg). Groups III, IV, and V received CS in doses of 3.3, 16.5, and 33 mg/kg, respectively. Three pharmacologically validated experimental models - elevated plus maze (EPM), light and dark box (LDB), and open field tests (OFT) - were employed...
November 2016: Indian Journal of Pharmacology
https://www.readbyqxmd.com/read/28051151/metal-transport-protein-8-in-camellia-sinensis-confers-superior-manganese-tolerance-when-expressed-in-yeast-and-arabidopsis-thaliana
#17
Qinghui Li, Yue Li, Xiayuan Wu, Lin Zhou, Xujun Zhu, Wanping Fang
Manganese (Mn) is an important micronutrient element required for plant growth and development, playing catalytic roles in enzymes, membranes and DNA replication. The tea plant (Camellia sinensis) is able to accumulate high concentration of Mn without showing signs of toxicity, but the molecular mechanisms underlying this remain largely unknown. In this study, the C. sinensis cultivar 'LJCY' had higher Mn tolerance than cultivar 'YS', because chlorophyll content reduction was lower under the high Mn treatment...
January 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28049097/in-vivo-anti-arthritic-efficacy-of-camellia-sinensis-l-in-collagen-induced-arthritis-model
#18
Ankit Tanwar, Raman Chawla, Md Meraj Ansari, Neha, Pallavi Thakur, Ankita Singh Chakotiya, Rajeev Goel, Himanshu Ojha, M Asif, Mitra Basu, Rajesh Arora, Haider Ali Khan
BACKGROUND: Rheumatoid arthritis (RA), an autoimmune inflammatory disorder with synovial hyperplasia, destruction of cartilage, bone damage is often associated with risk of infections. Such risk could be attributed towards usage of immunosuppressive agents. Thus, the present study was undertaken to evaluate the anti-arthritic efficacy of aquo-alcoholic extract of Camellia sinensis (L.). MATERIAL AND METHODS: Dried leaves of Camellia sinensis (L.) or Cs were filtered and extracted in 1:1 aqueous: ethanol by Soxhlet apparatus followed by lyophilization and spray drying to develop amorphous powder...
March 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28038881/green-tea-camellia-sinensis-for-patients-with-knee-osteoarthritis-a-randomized-open-label-active-controlled-clinical-trial
#19
Mohammad Hashem Hashempur, Sara Sadrneshin, Seyed Hamdollah Mosavat, Alireza Ashraf
BACKGROUND: Green tea is known as a dietary supplement and a novel functional food worldwide. Since there are increasing preclinical evidence about efficacy of green tea for treating osteoarthritis, this study has aimed at assessing its efficacy and safety for patients with knee osteoarthritis. METHODS: This is a randomized open-label active-controlled clinical trial. As many as fifty adults with osteoarthritis of knee were randomly allocated to receive the green tea extract (in dosage form of tablet) plus diclofenac tablet as "intervention group"; or: diclofenac tablet alone as "control group" for a period of four weeks...
December 18, 2016: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28036083/isolation-of-chs-gene-from-brunfelsia-acuminata-flowers-and-its-regulation-in-anthocyanin-biosysthesis
#20
Min Li, Yu-Ting Cao, Si-Rui Ye, Muhammad Irshad, Teng-Fei Pan, Dong-Liang Qiu
Chalcone synthase gene (BaCHS) from Brunfelsia acuminata flowers was isolated using RT-PCR and RACE. The coding region of the gene is 1425-bp with an open reading frame of 1170-bp, 73-bp 5'UTR, and 172-bp 3'UTR. Its deduced protein does not have a signal peptide but does contain a cond_enzyme superfamily domain, and consists of 389 amino acids with a predicted molecular mass of 42,699 Da and a pI of 6.57. The deduced amino acid sequence of BaCHS shares 90%, 88%, 85%, 84% and 79% identity with CHS from Petunia hybrida, Nicotiana tabacum, Solanum lycopersicum, Capsicum annuum and Camellia sinensis, respectively...
December 29, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
keyword
keyword
76803
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"