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https://www.readbyqxmd.com/read/28729838/detection-of-emodin-derived-glutathione-adduct-in-normal-rats-administered-with-large-dosage-of-polygoni-multiflori-radix
#1
Li-Long Jiang, Dong-Sheng Zhao, Ya-Xi Fan, Qiong Yu, Ping Li, Hui-Jun Li
Polygoni Multiflori Radix (PMR) has been commonly used as a tonic in China for centuries. PMR-associated hepatotoxicity has been drawing increasingly more attention in recent years in parallel with its wide utilization. Anthraquinones (AQs) are recognized as the main hepatotoxic components in PMR. However, the exact underlying mechanism of AQs poisoning is still not fully understood. Herein, we proposed a hypothesis that metabolic activation of AQs such as emodin was involved in PMR-induced liver injury, AQs followed to generate the electrophilic reactive metabolites and subsequently formed covalent adduct with cellular nucleophiles in the liver to exert hepatotoxicity...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28720952/anthocyanins-enriched-purple-tea-exhibits-antioxidant-immunostimulatory-and-anticancer-activities
#2
Robin Joshi, Ajay Rana, Vinay Kumar, Dharmesh Kumar, Yogendra S Padwad, Sudesh Kumar Yadav, Ashu Gulati
Purple coloured tea shoot clones have gained interest due to high content of anthocyanins in addition to catechins. Transcript expression of genes encoding anthocyanidin reductase (ANR), dihydroflavonol-4-reductase (DFR), anthocyanidin synthase (ANS), flavonol synthase (FLS) and leucoantho cyanidin reductase (LAR) enzymes in three new purple shoot tea clones compared with normal tea clone showed higher expression of CsDFR, CsANR, CsANS and lower expression of CsFLS and CsLAR in purple shoot clones compared to normal clone...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28720220/application-of-ultrahigh-performance-liquid-chromatography-quadrupole-time-of-flight-mass-spectrometry-for-the-characterization-of-organic-aerosol-searching-for-naphthenic-acids
#3
Mahmoud M Yassine, Ewa Dabek-Zlotorzynska
Naphthenic acids (NAs) are naturally occurring constituents of hydrocarbon deposits (petroleum, oil sands bitumen, and crude oils), and present in any facilities that extract, process or use crude oil or bitumen for manufacturing. In the Athabasca oil sands region (AOSR) of Alberta, Canada, this diverse group of saturated acyclic, monocyclic, and polycyclic carboxylic acids is present in bitumen and in tailing ponds. Little is known about the occurrence of residual oil sands derived organic material, including NAs, in atmospheric particulate matter (PM)...
June 28, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28715745/a-practical-protocol-for-comprehensive-evaluation-of-sulfur-fumigation-of-gastrodia-rhizoma-using-metabolome-and-health-risk-assessment-analysis
#4
Chuanzhi Kang, Chang-Jiang-Sheng Lai, Dan Zhao, Tao Zhou, Da-Hui Liu, Chaogeng Lv, Sheng Wang, Liping Kang, Jian Yang, Zhi-Lai Zhan, Lu-Qi Huang, Lanping Guo
Gastrodia Rhizoma is one of the most heavily sulfur-fumigated edible and medical herbs in the marketplace. We developed a practical protocol using an ultra-performance liquid chromatography coupled with quadrupole time-of-flight-MS(E) (UPLC/QTOF-MS(E))-based metabolome and health risk assessment model to identify characteristic sulfur-fumigated markers, dissect chemical transformation mechanisms, and control the quality of sulfur-fumigated Gastrodia Rhizoma. Two sulfur-containing p-hydroxybenzyl products, one sulfur-containing disaccharide, one glycolipid, and two phospholipids were selected and identified as markers based on multivariate statistical analysis...
July 4, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28714069/discriminant-biomarkers-of-acute-respiratory-distress-syndrome-associated-to-h1n1-influenza-identified-by-metabolomics-hplc-qtof-ms-ms-platform
#5
Alessia Ferrarini, Laura Righetti, Ma Paz Martínez, Mariano Fernández, Annalaura Mastrangelo, Juan P Horcajada, Antoni Betbesé, Andrés Esteban, Jordi Ordóñez, Joaquín de Gea, Jesús Ruiz Cabello, Federica Pellati, José A Lorente, Nicolás Nin, Francisco J Rupérez
Acute Respiratory Distress Syndrome (ARDS) is a serious complication of influenza A (H1N1) virus infection. Its pathogenesis is unknown, and biomarkers are lacking. Untargeted metabolomics allows the analysis of the whole metabolome in a biological compartment, identifying patterns associated with specific conditions. We hypothesized that LC-MS could help identify discriminant metabolites able to define the metabolic alterations occurring in patients with influenza A (H1N1) virus infection that developed ARDS...
July 17, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28710994/toxic-compounds-from-tobacco-in-placenta-samples-analyzed-by-uplc-qtof-ms
#6
Somayeh Mohammadi, Celia Domeno, Isabel Nerin, Margarita Aznar, Pilar Samper, Gholamreza Khayatian, Cristina Nerin
Polycyclic aromatic hydrocarbons (PAHs), tobacco-specific nitrosamines (TSNAs) and aromatic amines are carcinogens present in cigarette smoke. These compounds are distributed in the human body and they could be transferred to the foetus during the pregnancy. Placenta is the main barrier to these toxic compounds and its study is the objective of this work. A method based on solid-phase extraction (SPE) with ultra-performance liquid chromatography-tandem quadrupole-time-of-flight mass spectrometry (UPLC-QTOF-MS) has been examined and optimized for the analysis of 9 target analytes (4 tobacco-specific nitrosamines and some of their metabolites, 3 aromatic amines, nicotine and cotinine) in 26 placenta samples from smoking and non-smoking women...
June 20, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28701881/a-comparative-study-on-chemical-composition-of-total-saponins-extracted-from-fermented-and-white-ginseng-under-the-effect-of-macrophage-phagocytotic-function
#7
REVIEW
Dan Xiao, Yang Xiu, Hao Yue, Xiuli Sun, Huanxi Zhao, Shuying Liu
In this study, white ginseng was used as the raw material, which was fermented with Paecilomyces hepiali through solid culture medium, to produce ginsenosides with modified chemical composition. The characteristic chemical markers of the products thus produced were investigated using rapid resolution liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (RRLC-QTOF-MS). Chemical profiling data were obtained, which were then subjected to multivariate statistical analysis for the systematic comparison of active ingredients in white ginseng and fermented ginseng to understand the beneficial properties of ginsenoside metabolites...
July 2017: Journal of Ginseng Research
https://www.readbyqxmd.com/read/28700722/anti-inflammatory-properties-of-extracts-from-chimonanthus-nitens-oliv-leaf
#8
Qi Sun, Jiajin Zhu, Feiwei Cao, Fengjia Chen
Chimonanthus nitens Oliv. (CN) is a species in the family Calycanthaceae. Its leaf is widely used to make traditional herbal tea in southern China and has a wide range of therapeutic effects. The profile of the ethanol extracts from CN leaves was identified by UPLC-QTOF-MS/MS. Forty seven compounds were determined including organic acids, phenolic acids and derivatives, flavonoids, coumarins, fatty acids and other compounds. The effect of the CN extracts on the inflammatory damage in zebrafish and in RAW 264...
2017: PloS One
https://www.readbyqxmd.com/read/28700524/challenges-for-detecting-valproic-acid-in-a-nontargeted-urine-drug-screening-method
#9
Jeffrey D Pope, Marion J Black, Olaf H Drummer, Hans G Schneider
BACKGROUND: Valproic acid (VPA) is a widely prescribed medicine, and acute toxicity is possible. As such, it should be included in any nontargeted urine drug screening method. In many published liquid chromatography-electrospray ionization-mass spectrometry (LC-ESI-MS/MS) methods, VPA is usually measured using a pseudo-multiple reaction monitoring (MRM) transition. We investigate a simple ultra-high-performance liquid chromatography-quadrupole time-of-flight (QTof) approach to detect the presence of VPA with more confidence...
August 2017: Therapeutic Drug Monitoring
https://www.readbyqxmd.com/read/28698461/dereplication-guided-isolation-of-new-phenylpropanoid-substituted-diglycosides-from-cistanche-salsa-and-their-inhibitory-activity-on-no-production-in-macrophage
#10
Jongmin Ahn, Hee-Sung Chae, Young-Won Chin, Jinwoong Kim
Dereplication allows for a rapid identification of known and unknown compounds in plant extracts. In this study, we performed liquid chromatography-mass spectroscopy (LC-MS)- based dereplication using data from ESI⁺ QTOF-MS for the analysis of phenylpropanoid-substituted diglycosides, the major active constituents of Cistanche salsa (C. A. Mey.) Beck. Using TOF-MS alone, the substructures of these compounds could be unambiguously confirmed based on the characteristic fragmentation patterns of various product ions...
July 8, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28688846/evaluation-of-nitrate-effects-in-the-aqueous-photodegradability-of-selected-phenolic-pollutants
#11
G Castro, I Rodríguez, M Ramil, R Cela
The effect of nitrate in the aqueous photodegradation of five phenolic environmental pollutants (ortho-phenylphenol, OPP; methyl paraben, MeP; propyl paraben, PrP; Triclosan, TCS and bisphenol A, BPA) is evaluated. Time-course of precursor compounds and formation of transformation products (TPs) were investigated by liquid chromatography quadrupole time-of-flight mass spectrometry (LC-QTOF-MS). Nitrate showed a positive effect in the removal of selected pollutants. Observed TPs resulted from hydroxylation, aromatic nitration (with or without molecule cleavage) and nitro dehalogenation processes...
July 3, 2017: Chemosphere
https://www.readbyqxmd.com/read/28686313/rapid-characterization-of-chemical-constituents-of-platycodon-grandiflorum-and-its-adulterant-adenophora-stricta-by-uplc-qtof-ms-ms
#12
Cuizhu Wang, Nanqi Zhang, Zhenzhou Wang, Zeng Qi, Bingzhen Zheng, Pingya Li, Jinping Liu
Platycodon grandiflorum (PG) is extensively used for treating cough, excessive phlegm, sore throat, bronchitis and asthma. Whereas Adenophora stricta (AS) is commonly used to reduce phlegm, clear lung and tonify stomach. Due to similar appearances, PG is sometimes adulterated with cheap AS so as to gain profits. And this will inevitably result in different pharmacological property. In order to further clarify the differences in the chemical composition of these two Chinese herbs, the ultra-high performance liquid chromatography combined with quadrupole time-of-flight tandem mass spectrometry (UPLC-QTOF-MS/MS) coupled with UNIFI platform was used to establish a reliable, simple, sensitive and rapid analytical method...
July 7, 2017: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/28683392/database-driven-screening-of-south-african-surface-water-and-the-targeted-detection-of-pharmaceuticals-using-liquid-chromatography-high-resolution-mass-spectrometry
#13
Timothy Paul Wood, Christiaan Du Preez, Adriaan Steenkamp, Cornelia Duvenage, Egmont R Rohwer
Pharmaceuticals and personal care products are released into aquatic environments, largely as a result of ineffectual removal during wastewater treatment. Here we present a screening strategy based on the use of three commercially available mass spectral databases, combined into a single searchable entity and parallelized by cluster computing. In addition to this, a targeted solid phase extraction method with Ultra High Pressure Liquid Chromatography coupled to quadrupole time of flight mass spectrometry (UHPLC-QTOF) was used to quantify 99 pharmaceuticals in South African surface water on a national level...
July 3, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28670781/structural-characterization-and-pharmacological-evaluation-of-the-new-synthetic-cannabinoid-cumyl-pegaclone
#14
Verena Angerer, Lukas Mogler, Jan-Patrick Steitz, Philippe Bisel, Cornelius Hess, Clara T Schoeder, Christa E Müller, Laura M Huppertz, Folker Westphal, Jan Schäper, Volker Auwärter
The number of new psychoactive substances (NPS) that have emerged on the European market has been rapidly growing in the last years, with a particularly high number of new compounds from the group of synthetic cannabinoid receptor agonists. There have been various political efforts to control the trade and the use of NPS worldwide. In Germany, the 'Act to control the distribution of new psychoactive substances' (NpSG) came into force in November 2016. In this new Act two groups of substances were defined, the group 'cannabimimetics/synthetic cannabinoids' covering indole, indazole and benzimidazole core structures, and a second group named 'compounds derived from 2-phenethylamine'...
July 3, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28667937/metabolic-profiling-of-the-traditional-chinese-medicine-formulation-yu-ping-feng-san-for-the-identification-of-constituents-relevant-for-effects-on-expression-of-tnf-%C3%AE-ifn-%C3%AE-il-1%C3%AE-and-il-4-in-u937-cells
#15
Nikles Stefanie, Monschein Marlene, Zou Huiqin, Liu Yong, He Xiaojuan, Fan Danping, Lu Aiping, Yu Kate, Isaac Giorgis, Bauer Rudolf
Yu Ping Feng San (YPFS) is a classical TCM formulation which has been traditionally used for treatment of immune system related diseases such as chronic bronchitis, allergic rhinitis and asthma. The formula is a mixture of Radix Saposhnikoviae (Fangfeng), Radix Astragali (Huangqi), and Rhizoma Atractylodis macrocephalae (Baizhu). TLC- and LC-DAD-ESI-MS/MS methods have been developed for the analysis of the metabolic profiles of the single herbs and of the formula. Decoctions and ASE extracts were analyzed in order to trace components of the individual herbs in YPFS...
June 15, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28666227/comprehensive-profiling-and-characterization-of-chemical-constituents-of-rhizome-of-anemarrhena-asphodeloides-bge
#16
De Ji, Zi-Yan Huang, Cheng-Hao Fei, Wei-Wei Xue, Tu-Lin Lu
The rhizome of Anemarrhena asphodeloides Bge. is commonly used as an herbal medicine in China. In this study, ultra-high performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UHPLC-QTOF-MS) was used, in both negative and positive ion modes, to comprehensively analyze the chemical constituents of A. asphodeloides. From the intact precursor ions, MS/MS fragmentation information, and previous reports, we identified 89 compounds. These compounds included 8 cyclic peptides, 11 flavones (9 xanthones), 45 steroidal saponins, 15 fatty acids, 3 lignans, and 7 other compounds...
June 19, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28665763/overall-and-specific-migration-from-multilayer-high-barrier-food-contact-materials-kinetic-study-of-cyclic-polyester-oligomers-migration
#17
Sara Úbeda, Margarita Aznar, Paula Vera, Cristina Nerín, Luis Henríquez, Laura Taborda, Claudia Restrepo
Most multilayer high barrier materials used in food packaging have a polyurethane adhesive layer in their structures. In order to assess the safety of these materials, it is important to determine the compounds intentionally added to the adhesives (IAS) as well as those non-intentionally added substances (NIAS). During the manufacture of polyurethane adhesives, some by-products can be formed, such as cyclic polyester oligomers coming from the reaction between dicarboxylic acids and glycols. Since these compounds are not listed in the Regulation 10/2011/EU, they should not be found in migration above 0...
June 30, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28665506/simultaneous-endo-and-exo-complex-formation-of-pyridine-4-arene-dimer-with-neutral-and-anionic-guests
#18
Anniina Kiesilä, Lauri Kivijärvi, Ngong Kodiah Beyeh, Jani Moilanen, Michael Groessl, Filip Topic, Tatiana Rothe, Sven Götz, Kari Rissanen, Arne Lützen, Elina Kalenius
Complex formation between hexafluorophosphate (PF6-) and tetraisobutyl-octahydroxypyridine[4]arene (1) has been thoroughly studied in gas phase (ESI-QTOF-MS, IM-MS, DFT calculations), solid state (X-ray crystallography) and in chloroform solution (1H, 19F and DOSY NMR). In all states of matter, simultaneous endo-complexation of solvent molecules and exo-complexation of PF6- anion within pyridine[4]arene dimer was observed. While similar ternary complex formation is often observed in solid state, this is a unique example of such behaviour in the gas phase that has never been observed so far...
June 30, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28659236/antioxidant-activities-and-phytochemical-constituents-of-antidesma-thwaitesianum-m%C3%A3-ll-arg-leaf-extracts
#19
Bhanuz Dechayont, Arunporn Itharat, Pathompong Phuaklee, Jitpisute Chunthorng-Orn, Thana Juckmeta, Nuntika Prommee, Nitra Nuengchamnong, Pintusorn Hansakul
OBJECTIVE: To investigate the antioxidant activities as well as phytochemical constituents of Antidesma thwaitesianum Müll. Arg. leaf extracts. METHODS: The leaves of A. thwaitesianum were extracted using three different methods: blending with distilled water, maceration with ethanol and decoction. The chemical antioxidant activity of the plant leaf extracts was evaluated using 2,2-diphenyl-1-picryhydrazyl (DPPH) radical and 2,2'-azinobis(3-ethylbenzo-thiazoline-6-sulfonic acid) diammonium salt (ABTS⁺) radical scavenging assays, as well as the ferric reducing antioxidant power assay...
July 2017: Journal of Integrative Medicine
https://www.readbyqxmd.com/read/28652648/role-of-ph-in-the-recovery-of-bovine-milk-oligosaccharides-from-colostrum-whey-permeate-by-nanofiltration
#20
Joshua L Cohen, Daniela Barile, Yan Liu, Juliana M L N de Moura Bell
Milk oligosaccharides are associated with improved health outcomes in infants. Nanofiltration (NF) is used for isolation of bovine milk oligosaccharides (BMO). The study aim was to improve the recovery of BMO from lactose-hydrolyzed colostrum whey permeate. The retention factors of carbohydrates at various pH and transmembrane pressures were determined for a nanofiltration membrane, which was used at pilot scale to purify BMO. Carbohydrates were quantified by liquid chromatography and characterized using nano-LC-Chip-QToF mass spectrometry...
March 2017: International Dairy Journal
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