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https://www.readbyqxmd.com/read/28722418/urine-metabonomics-reveals-early-biomarkers-in-diabetic-cognitive-dysfunction
#1
Lili Song, Pengwei Zhuang, Mengya Lin, Mingqin Kang, Hongyue Liu, Yuping Zhang, Zhen Yang, Yunlong Chen, Yanjun Zhang
Recently, increasing attention has been paid to diabetic encephalopathy which is one of frequent diabetic complications and affects nearly 30% diabetics. Since cognitive dysfunction from diabetic encephalopathy might develop irreversible dementia, early diagnosis and detection of this disease is of great significance for its prevention and treatment. This study is to investigate the early specific metabolites biomarkers in the urine prior to the onset of diabetic cognitive dysfunction (DCD) by using metabolomics technology...
July 19, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28722176/comparative-study-of-submerged-and-surface-culture-acetification-process-for-orange-vinegar
#2
Cristina Cejudo-Bastante, Enrique Durán-Guerrero, Carmelo García-Barroso, Remedios Castro-Mejías
BACKGROUND: The two main acetification methodologies generally employed in the production of vinegar (surface and submerged cultures) were studied and compared for the production of orange vinegar. Polyphenols (UPLC/DAD) and volatiles compounds (SBSE-GC/MS) were considered as the main variables in the comparative study. Sensory characteristics of the obtained vinegars were also evaluated. RESULTS: Seventeen polyphenols and twenty four volatile compounds were determined in the samples during both acetification processes...
July 19, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28720971/determination-of-anthocyanins-and-non-anthocyanin-polyphenols-by-ultra-performance-liquid-chromatography-electrospray-ionization-mass-spectrometry-uplc-esi-ms-in-jussara-euterpe-edulis-extracts
#3
Gláucia S Vieira, Anna S F Marques, Mariana T C Machado, Vanessa M Silva, Miriam D Hubinger
This work aimed to propose two analytical methods for the quantitative and qualitative analysis of major anthocyanins and non-anthocyanin phenolic compounds in jussara (Euterpe edulis) extracts, using ultra performance liquid chromatography-mass spectrometry. These methods were evaluated for selectivity, precision, linearity, detection and quantification limits. The complete separation of 5 anthocyanins and 22 non-anthocyanins polyphenols was achieved in 4.5 and 7 min, respectively. Limits of detection ranged from 0...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28720952/anthocyanins-enriched-purple-tea-exhibits-antioxidant-immunostimulatory-and-anticancer-activities
#4
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
#5
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/28719813/comparative-stability-indicating-chromatographic-methods-for-determination-of-4-hexylresorcinol-in-pharmaceutical-formulation-and-shrimps
#6
Rafeek F Shokry, Lories I Bebawy, Mohamed R Elghobashy, Samah S Abbas
Three chromatographic stability-indicating methods were developed for determination of 4-hexylresorcinol in pure form and in a pharmaceutical formulation. Method A was based on a gradient elution liquid chromatographic HPLC determination of 4-hexylresorcinol, its related impurities and in presence of its degradation products. UPLC-MS/MS (Method B) was described for determination of the cited drug in presence of its degradation products. Method C was a thin- layer chromatography (TLC)-densitometry method for the separation and determination of the active ingredient, one of its related impurities and in presence of its degradation products...
July 8, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28719014/bioavailability-and-tolerability-of-nebulised-dexamethasone-sodium-phosphate-in-adult-horses
#7
A D Haspel, S Giguère, K A Hart, L J Berghaus, J L Davis
BACKGROUND: Nebulisation of the injectable dexamethasone sodium phosphate (DSP) would offer an inexpensive way of delivering a potent corticosteroid directly to the lungs of horses with asthma. However, this approach would be advantageous only if systemic absorption is minimal and if the preservatives present in the formulation do not induce airway inflammation. OBJECTIVE: To investigate the bioavailability of nebulised DSP and to determine whether it induces airway inflammation or hypothalamic-pituitary-adrenal (HPA) axis suppression in healthy adult horses...
July 18, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/28718960/chemical-uplc-esi-ms-ms-profiling-of-aconitum-alkaloids-and-their-metabolites-in-rat-plasma-and-urine-after-oral-administration-of-aconitum-carmichaelii-debx-root-extract
#8
Mingjie Zhang, Manman Wang, Jiajia Liang, Yongqing Wen, Zhili Xiong
In this paper, an ultra high performance liquid chromatography tandem mass spectrometric (UPLC-ESI-MS/MS) method in positive ion mode was established to systematically identify and to compare the major aconitum alkaloids and their metabolites in rat plasma and urine after oral administration of Fuzi extract. A total twenty-nine components including twenty-five C19 -diterpenoid alkaloids and four C20 -diterpenoid alkaloids were identified in Fuzi extract. Thirteen of the parent components and five metabolites were detected in rat plasma and sixteen parent compounds and six metabolites in urine...
July 18, 2017: Biomedical Chromatography: BMC
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
#9
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/28714227/transepithelial-transport-of-milk-derived-angiotensin-i-converting-enzyme-inhibitory-peptide-with-the-rlsfnp-sequence
#10
Yuxing Guo, Junai Gan, Qian Zhu, Xiaoqun Zeng, Yangying Sun, Zhen Wu, Daodong Pan
BACKGROUND: To exert an antihypertensive effect after oral administration, Angiotensin I-converting enzyme (ACE) inhibitory peptides must remain active after intestinal transport. The purpose of this article is to elucidate the transport permeability and route of ACE inhibitory peptide Arg-Leu-Ser-Phe-Asn-Pro (RLSFNP) across the intestinal epithelium using a Caco-2 cell monolayers. RESULTS: Intact RLSFNP and RLSFNP breakdown fragments F, FNP, SFNP and RLSF were found in RLSFNP transport solution across Caco-2 cell monolayers using ultra-performance liquid chromatography tandem mass (UPLC-MS)...
July 17, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28712997/novel-characteristics-of-horseradish-peroxidase-immobilized-onto-the-polyvinyl-alcohol-alginate-beads-and-its-methyl-orange-degradation-potential
#11
Muhammad Bilal, Tahir Rasheed, Hafiz M N Iqbal, Hongbo Hu, Wei Wang, Xuehong Zhang
Herein, we report the immobilization of in-house isolated horseradish peroxidase (HRP) from Armoracia rusticana with novel characteristics. The HRP was immobilized onto the self-fabricated polyvinyl alcohol-alginate (PVA-alginate) beads using sodium nitrate as a cross-linker. The PVA-alginate beads (2.0mm size) developed using 10% PVA and 1.5% sodium alginate showed maximal immobilization yield. The surface morphologies of the PVA-alginate (control) and immobilized-HRP were characterized by scanning electron microscopy (SEM)...
July 13, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28710994/toxic-compounds-from-tobacco-in-placenta-samples-analyzed-by-uplc-qtof-ms
#12
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/28709799/trough-dabrafenib-plasma-concentrations-can-predict-occurrence-of-adverse-events-requiring-dose-reduction-in-metastatic-melanoma
#13
Marine Rousset, Caroline Dutriaux, Pauline Bosco-Lévy, Sorilla Prey, Anne Pham-Ledard, Léa Dousset, Emilie Gérard, Stephane Bouchet, Mireille Canal-Raffin, Karine Titier, Mathieu Molimard
INTRODUCTION: Dabrafenib and trametinib bitherapy provides significant benefits in BRAFV600(mut) metastatic melanoma patients; however, adverse events (AE) occur, leading to dose reduction in 33% of patients. We aimed to investigate a relation between plasma dabrafenib and trametinib concentrations and occurrence of AE. METHODS: Plasma samples from metastatic BRAFV600(mut) melanoma patients treated with dabrafenib±trametinib were prospectively collected at trough concentration before any dose reduction...
July 12, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28709014/a-rapid-liquid-chromatography-tandem-mass-spectrometry-for-the-quantification-of-fosfomycin-in-plasma-urine-and-aqueous-fluids
#14
Nahed El-Najjar, Jonathan Jantsch, André Gessner
A simple and fast ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) method for the analysis of Fosfomycin in different matrices (human plasma/urine, and aqueous fluid) has been established and validated. Sample cleanup consists, depending on the matrix used, on protein precipitation or dilution with methanol containing isotopically labeled Fosfomycin as internal standard. Compounds, separated on a Luna Omega PS C18 column, were detected in multiple reactions monitoring in negative ion mode using API4000 system...
June 27, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28708280/biodegradation-of-ochratoxin-a-by-alcaligenes-faecalis-isolated-from-soil
#15
H H Zhang, Y Wang, C Zhao, J Wang, X L Zhang
AIMS: The aim of the present work is to report on the hydrolytic action of Alcaligenes faecalis isolated from soil samples and its ability to degrade ochratoxin A. METHODS AND RESULTS: An Alcaligenes faecalis strain was identified and characterized by employing both a phenotypic analysis and 16S rDNA sequence analysis. The results show that this strain could degrade ochratoxin A efficiently but could not use it as a sole carbon source. Ochratoxin α was confirmed as a degradation product in the intracellular extract of Alcaligenes faecalis using UPLC-MS/MS...
July 14, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28707163/characterization-of-snps-in-the-dopamine-%C3%AE-hydroxylase-gene-providing-new-insights-into-its-structure-function-relationship
#16
Toyanji Joseph Punchaichira, Sanjay Kumar Dey, Anirban Mukhopadhyay, Suman Kundu, B K Thelma
Dopamine-β-hydroxylase (DBH, EC 1.14.17.1), an oxido-reductase that catalyses the conversion of dopamine to norepinephrine, is largely expressed in sympathetic neurons and adrenal medulla. Several regulatory and structural variants in DBH associated with various neuropsychiatric, cardiovascular diseases and a few that may determine enzyme activity have also been identified. Due to paucity of studies on functional characterization of DBH variants, its structure-function relationship is poorly understood. The purpose of the study was to characterize five non-synonymous (ns) variants that were prioritized either based on previous association studies or Sorting Tolerant From Intolerant (SIFT) algorithm...
July 13, 2017: Neurogenetics
https://www.readbyqxmd.com/read/28704941/effect-of-uv-c-radiation-ultra-sonication-electromagnetic-field-and-microwaves-on-changes-in-polyphenolic-compounds-in-chokeberry-aronia-melanocarpa
#17
Tomasz Cebulak, Jan Oszmiański, Ireneusz Kapusta, Sabina Lachowicz
Chokeberry fruits are highly valued for their high content of polyphenolic compounds. The use of such abiotic stress factors as UV-C radiation, an electromagnetic field, microwave radiation, and ultrasound, at different operation times, caused differentiation in the contents of anthocyanins, phenolic acids, flavonols, and flavan-3-ols. Samples were analyzed for contents of polyphenolics with ultra-performance liquid chromatography and photodiode detector-quadrupole/time-of-flight mass spectrometry (UPLC-PDA-MS/MS)...
July 12, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28704754/metabolomics-study-of-cadmium-induced-diabetic-nephropathy-and-protective-effect-of-caffeic-acid-phenethyl-ester-using-uplc-q-tof-ms-combined-with-pattern-recognition
#18
Pin Gong, Xiangna Chang, Xuefeng Chen, Xiaohuan Bai, He Wen, Sihui Pi, Wenjuan Yang, Lan Wang, Fuxin Chen
Diabetic nephropathy (DN) is the most severe complication of diabetes and multiple factors are involved in the pathogenesis of DN. Among them, cadmium (Cd) acts as a risk factor inducing the occurrence of DN. The present study focused on investigating the protective role of caffeic acid phenethyl ester (CAPE), an active component of propolis from honeybee hives, against Cd-induced DN in mice based on ultra performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS)and pattern recognition...
June 28, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28704724/development-of-immunoaffinity-solid-phase-microextraction-rods-for-analysis-of-three-estrogens-in-environmental-water-samples
#19
Cuicui Wang, Linyan Yang, Na Li, Xinda Zhang, Yongze Guo, Cun Li
In this study, immunoaffinity solid phase microextraction (SPME) rods were developed for the analysis of diethylstilbestrol (DES), hexestrol (HES) and dienestrol (DIS) followed by ultra high-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). This immunoaffinity SPME device was built with three stainless steel rods bundled together as one and modified with porous silicate particles. As an extraction sorbent, antibody immobilization approach was employed based on the covalent attachment of the anti-diethylstilbestrol monoclonal antibody (mAb) onto the rods...
July 6, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28700722/anti-inflammatory-properties-of-extracts-from-chimonanthus-nitens-oliv-leaf
#20
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
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