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https://www.readbyqxmd.com/read/28809551/direct-speciation-analysis-of-arsenic-in-whole-blood-and-blood-plasma-at-low-exposure-levels-by-hydride-generation-cryotrapping-inductively-coupled-plasma-mass-spectrometry
#1
Tomáš Matoušek, Zhifeng Wang, Christelle Douillet, Stanislav Musil, Miroslav Stýblo
A method for analysis of toxicologically important arsenic species in blood plasma and whole blood by selective hydride generation with cryotrapping (HG-CT) coupled either to atomic absorption (AAS) with a quartz multiatomizer or to inductively coupled plasma mass spectrometry (ICP-MS) has been validated. Sample preparation which involved only 5 times dilution with addition of Triton X-100, Antifoam B and L-cysteine suppressed excessive foaming in a hydride generator. Calibration slopes for whole blood and blood plasma spiked with arsenate, monomethylarsonate and dimethylarsinate at 0...
August 15, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28808723/plasma-metabolite-abundances-are-associated-with-urinary-enterolactone-excretion-in-healthy-participants-on-controlled-diets
#2
Fayth L Miles, Sandi L Navarro, Yvonne Schwarz, Haiwei Gu, Danijel Djukovic, Timothy W Randolph, Ali Shojaie, Mario Kratz, Meredith A J Hullar, Paul D Lampe, Marian L Neuhouser, Daniel Raftery, Johanna W Lampe
Enterolignans, products of gut bacterial metabolism of plant lignans, have been associated with reduced risk of chronic diseases, but their association with other plasma metabolites is unknown. We examined plasma metabolite profiles according to urinary enterolignan excretion in a cross-sectional analysis using data from a randomized crossover, controlled feeding study. Eighty healthy adult males and females completed two 28-day feeding periods differing by glycemic load, refined carbohydrate, and fiber content...
August 15, 2017: Food & Function
https://www.readbyqxmd.com/read/28795489/plasma-metabolomics-reveals-steroidal-alkaloids-as-novel-biomarkers-of-tomato-intake-in-mice
#3
Morgan J Cichon, Ken M Riedl, Lei Wan, Jennifer M Thomas-Ahner, David M Francis, Steven K Clinton, Steven J Schwartz
SCOPE: Diets rich in tomato products are associated with a reduced risk of various chronic disease processes. The carotenoid lycopene is most intensely studied as the bioactive mediating health effects, yet tomatoes contain an array of phytochemicals. We conducted an untargeted metabolomics study on blood plasma to identify novel markers of tomato consumption absorbed from the diet and released into the bloodstream in mice. METHODS AND RESULTS: Male mice were fed a control AIN-93G diet or the same diet supplemented with 0...
August 9, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28792616/proteomic-profiling-of-liver-and-plasma-in-chronic-ethanol-feeding-model-of-hepatic-alcohol-dehydrogenase-deficient-deer-mice
#4
Kamlesh K Bhopale, Samir M Amer, Lata Kaphalia, Kizhake V Soman, John E Wiktorowicz, G A Shakeel Ansari, Bhupendra S Kaphalia
BACKGROUND: Chronic alcohol abuse, a major risk factor for such diseases as hepatitis and cirrhosis, impairs hepatic alcohol dehydrogenase (ADH, key ethanol metabolizing enzyme). Therefore, differentially altered hepatic and plasma proteomes were identified in chronic ethanol feeding model of hepatic ADH-deficient (ADH(-) ) deer mice to understand the metabolic basis of alcoholic liver disease (ALD). METHODS: ADH(-) deer mice were fed 3.5g% ethanol via Lieber-DeCarli liquid diet daily for three months, and histology of the liver assessed...
August 9, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28792022/ambient-mass-spectrometry-in-metabolomics
#5
REVIEW
Chaevien S Clendinen, María Eugenia Monge, Facundo M Fernández
Since the introduction of desorption electrospray ionization (DESI) mass spectrometry (MS), ambient MS methods have seen increased use in a variety of fields from health to food science. Increasing its popularity in metabolomics, ambient MS offers limited sample preparation, rapid and direct analysis of liquids, solids, and gases, in situ and in vivo analysis, and imaging. The metabolome consists of a constantly changing collection of small (<1.5 kDa) molecules. These include endogenous molecules that are part of primary metabolism pathways, secondary metabolites with specific functions such as signaling, chemicals incorporated in the diet or resulting from environmental exposures, and metabolites associated with the microbiome...
August 9, 2017: Analyst
https://www.readbyqxmd.com/read/28782150/mri-assessment-of-coronary-microvascular-endothelial-nitric-oxide-synthase-function-using-myocardial-t1-mapping
#6
Sophia X Cui, Frederick H Epstein
PURPOSE: Endothelial nitric oxide synthase (eNOS) plays a central role in regulating vascular tone, blood flow, and microvascular permeability. Endothelial dysfunction, including eNOS dysfunction, is an early biomarker of vascular disease. This study aimed to show that myocardial T1 mapping during nitric oxide synthase (NOS) inhibition could assess coronary microvascular eNOS function. METHODS: Wild-type mice, eNOS(-/-) mice, and wild-type mice fed a high-fat diet underwent T1 mapping at baseline and for 20 min after injection of N(G) -nitro-L-arginine methyl ester (LNAME), a NOS inhibitor...
August 7, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28772225/an-lc-ms-ms-method-for-quantitation-of-chemopreventive-sphingadienes-in-food-products-and-biological-samples
#7
J H Suh, A M Makarova, J M Gomez, L A Paul, J D Saba
Colorectal cancer (CRC) is a leading cause of cancer mortality. Diet has a significant influence on colon cancer risk. Identifying chemopreventive agents, dietary constituents, practices and/or diet supplements that promote gut health and reduce the incidence of intestinal neoplasias and CRC could significantly impact public health. Sphingadienes (SDs) are dietary sphingolipids found in plant-based food products. SDs are cytotoxic to colon cancer cells and exhibit chemopreventive properties. The aim of the present study was to develop a sensitive and robust ultra-high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS) method for quantifying SDs in food products and biological samples...
July 24, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28772030/the-renal-cardiac-connection-in-subjects-with-preserved-ejection-fraction-a-population-based-study
#8
Amit Jain, Christopher Scott, Horng H Chen
AIMS: Chronic kidney disease (CKD) is prevalent and is associated with increased cardiovascular morbidity and mortality. The interaction between diastolic dysfunction (DD) and CKD in subjects with preserved systolic function is not well defined. This study sought to determine the association between renal function and DD in subjects with preserved ejection fraction. METHODS AND RESULTS: Through the Rochester Epidemiology Project, subjects who underwent echocardiography over 2 years with EF ≥50% were identified and the clinical data were obtained...
August 2017: ESC Heart Failure
https://www.readbyqxmd.com/read/28771708/metabolic-profiling-of-murine-plasma-reveals-eicosapentaenoic-acid-metabolites-protecting-against-endothelial-activation-and-atherosclerosis
#9
Yajin Liu, Xuan Fang, Xu Zhang, Jing Huang, Jinlong He, Liyuan Peng, Chenji Ye, Yingmei Wang, Fengxia Xue, Ding Ai, Dan Li, Yi Zhu
BACKGROUND AND PURPOSE: Atherosclerosis results from a maladaptive inflammatory response initiated by the intramural retention of LDL in susceptible areas of the arterial vasculature. ω-3 polyunsaturated fatty acids (ω-3) have protective effects in atherosclerosis; however, the molecular mechanism is still largely unknown. The present study used a metabolomic approach to reveal the atheroprotective metabolites of ω-3 and investigate the underlying mechanisms. EXPERIMENTAL APPROACH: We evaluated the development of atherosclerosis in LDL-receptor-deficient mice (LDLR(-/-) ) fed a Western-type diet (WTD) plus ω-3 and also LDLR(-/-) and fat-1 transgenic (LDLR(-/-) -fat-1(tg) ) mice fed a WTD...
August 3, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28770537/flavonoids-extracted-from-linaria-vulgaris-protect-against-hyperlipidemia-and-hepatic-steatosis-induced-by-western-type-diet-in-mice
#10
Wenhua Kuang, Xu Zhang, Zhou Lan
Previous studies have shown that flavonoids (Fs) present in Linaria vulgaris inhibit lipid accumulation in vitro. This study was designed to evaluate the effects of Fs extracted from Linaria vulgaris ssp. sinensis (Bebeaux) Hong, on hyperlipidemia and hepatic steatosis induced by a western-type diet in mice. The major constituents of Fs were analyzed by LC-MS analysis. C57BL/6 mice were fed a western-type diet for 8 weeks to induce hyperlipidemia (model group), or fed a western-type diet followed by Fs treatment (90, 30 or 10 mg/kg/day) or atorvastatin treatment (1...
August 2, 2017: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/28770206/meal-microstructure-characterization-from-sensor-based-food-intake-detection
#11
Abul Doulah, Muhammad Farooq, Xin Yang, Jason Parton, Megan A McCrory, Janine A Higgins, Edward Sazonov
To avoid the pitfalls of self-reported dietary intake, wearable sensors can be used. Many food ingestion sensors offer the ability to automatically detect food intake using time resolutions that range from 23 ms to 8 min. There is no defined standard time resolution to accurately measure ingestive behavior or a meal microstructure. This paper aims to estimate the time resolution needed to accurately represent the microstructure of meals such as duration of eating episode, the duration of actual ingestion, and number of eating events...
2017: Frontiers in Nutrition
https://www.readbyqxmd.com/read/28768294/measurement-of-metabolic-fluxes-using-stable-isotope-tracers-in-whole-animals-and-human-patients
#12
Julie A Reisz, Angelo D'Alessandro
PURPOSE OF REVIEW: Metabolic flux analysis using stable isotope labeled substrates allows for the tracing of carbon, nitrogen, and hydrogen atoms through metabolic pathways and is an invaluable tool for investigating dynamic metabolic changes occurring in health and disease. Studies of flux analysis in vivo are more technically challenging than in vitro or ex vivo but provide a highly detailed view of organ and/or systemic metabolism. We review here recent efforts in studies of diet and nutrition, non-small cell lung cancer, ischemia/reperfusion injury, and hemorrhagic shock where in vivo flux analysis was utilized to analyze metabolic modulation...
September 2017: Current Opinion in Clinical Nutrition and Metabolic Care
https://www.readbyqxmd.com/read/28764799/metabolomics-study-of-the-therapeutic-mechanism-of-schisandra-chinensis-lignans-in-diet-induced-hyperlipidemia-mice
#13
Jing-Hui Sun, Xu Liu, Li-Xin Cong, He Li, Cheng-Yi Zhang, Jian-Guang Chen, Chun-Mei Wang
BACKGROUND: Schisandra, a globally distributed plant, has been widely applied for the treatment of diseases such as hyperlipidemia, fatty liver and obesity in China. In the present work, a rapid resolution liquid chromatography coupled with quadruple-time-of-flight mass spectrometry (RRLC-Q-TOF-MS)-based metabolomics was conducted to investigate the intervention effect of Schisandra chinensis lignans (SCL) on hyperlipidemia mice induced by high-fat diet (HFD). METHODS: Hyperlipidemia mice were orally administered with SCL (100 mg/kg) once a day for 4 weeks...
August 1, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28764082/biotransformation-and-metabolism-of-three-mulberry-anthocyanin-monomers-by-rat-gut-microflora
#14
Yao Chen, Qian Li, Ting Zhao, Zhen Zhang, Guanghua Mao, Weiwei Feng, Xiangyang Wu, Liuqing Yang
Anthocyanins (ACNs) are naturally occurring components of human diet. Evidence has accumulated regarding the positive association of their intake with chronic disease. Because microbiota has been considered as a metabolic organ, the bacterial-dependent metabolisms of three types of ACNs from mulberry fruits (cyanidin-3-glucoside (C3G), cyanidin-3-rutinoside (C3R), delphinidin-3-rutinoside (D3R)) during a simulation of large intestine conditions were investigated. ACNs and metabolites were analysed and characterized by high performance liquid chromatography-electrospray ionization-mass spectrum (HPLC-ESI-MS/MS)...
December 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28756892/fast-sensitive-and-selective-gas-chromatography-tandem-mass-spectrometry-method-for-the-target-analysis-of-chemical-secretions-from-femoral-glands-in-lizards
#15
Jorge Sáiz, Roberto García-Roa, José Martín, Belén Gómara
Chemical signaling is a widespread mode of communication among living organisms that is used to establish social organization, territoriality and/or for mate choice. In lizards, femoral and precloacal glands are important sources of chemical signals. These glands protrude chemical secretions used to mark territories and also, to provide valuable information from the bearer to other individuals. Ecologists have studied these chemical secretions for decades in order to increase the knowledge of chemical communication in lizards...
July 21, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28755525/a-distinct-serum-metabolic-signature-of-distant-metastatic-papillary-thyroid-carcinoma
#16
Chen-Tian Shen, Yinan Zhang, Yu-Min Liu, Shan Yin, Xin-Yun Zhang, Wei-Jun Wei, Zhen-Kui Sun, Hong-Jun Song, Zhong-Ling Qiu, Cong-Rong Wang, Quan-Yong Luo
BACKGROUND: Although the incidence rate for thyroid cancer seems to have begun stabilizing in recent years, an increased rate of advanced stage of this disease has been reported. Additionally, distant metastasis is one of the most important prognostic factors of patients with papillary thyroid carcinoma (PTC). Unfortunately, the underlying mechanisms of distant metastasis as well as cell status like metabolism changes in distant metastatic tumors have not been clearly elucidated. OBJECTIVE: To identify serum metabolic signature of distant metastatic PTC...
July 29, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28755411/associations-of-current-diet-with-plasma-and-urine-tmao-in-the-karmen-study-direct-and-indirect-contributions
#17
Ralf Krüger, Benedikt Merz, Manuela J Rist, Paola G Ferrario, Achim Bub, Sabine E Kulling, Bernhard Watzl
SCOPE: Knowledge on the influence of current diet on TMAO levels in humans is still inconsistent. Thus, we aimed to investigate associations of current diet with urine and plasma TMAO levels and to determine the effect of different foods on TMAO variation. METHODS AND RESULTS: TMAO concentrations of 297 healthy individuals were assessed using (1) H-NMR spectroscopy for 24h urine collection and spot urine, and LC-MS for plasma. Of 35 assessed food groups, those with a correlation of ρ >|0...
July 29, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28743904/dietary-acrylamide-exposure-was-associated-with-mild-cognition-decline-among-non-smoking-chinese-elderly-men
#18
Zhao-Min Liu, Lap Ah Tse, Bailing Chen, Suyang Wu, Dicken Chan, Timothy Kowk, Jean Woo, Yu-Tao Xiang, Samuel Yeung-Shan Wong
The aim of the study is to explore the longitudinal association of dietary acrylamide exposure with cognitive performance in Chinese elderly. The analysis was conducted among 2534 non-smoking elderly men and women based on a prospective study, Mr. and Ms. OS Hong Kong. Dietary acrylamide intake was assessed by food frequency questionnaires with data on local food contamination, derived from the first Hong Kong Total Diet Study. Global cognitive function was assessed by Cantonese version of Mini-Mental State Exam (MMSE) at the baseline and the 4(th) year of follow-up...
July 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28736579/changes-of-myocardial-lipidomics-profiling-in-a-rat-model-of-diabetic-cardiomyopathy-using-uplc-q-tof-ms-analysis
#19
Shifen Dong, Rong Zhang, Yaoyue Liang, Jiachen Shi, Jiajia Li, Fei Shang, Xuezhou Mao, Jianning Sun
BACKGROUND: Diabetic cardiomyopathy (DCM) is a serious cardiac dysfunction induced by changes in the structure and contractility of the myocardium that are initiated in part by alterations in energy substrates. The underlying mechanisms of DCM are still under controversial. The observation of lipids, especially lipidomics profiling, can provide an insight into the know the biomarkers of DCM. The aim of our research was to detect changes of myocardial lipidomics profiling in a rat model of diabetic cardiomyopathy...
2017: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/28733235/determination-of-fumonisin-b1-levels-in-body-fluids-and-hair-from-piglets-fed-fumonisin-b1-contaminated-diets
#20
Pollyana C M C Souto, Alessandra V Jager, Fernando G Tonin, Tânia Petta, Mayra C Di Gregório, Anne-Marie Cossalter, Philippe Pinton, Isabelle P Oswald, George E Rottinghaus, Carlos A F Oliveira
The levels of fumonisin B1 (FB1) residues in plasma, urine, feces and hair from 24 piglets fed FB1-contaminated diets containing 3.1, 6.1 or 9.0 μg FB1.g(-1) for 28 days were determined using liquid chromatography coupled to mass spectrometry (LC-MS/MS). The levels of FB1 in plasma, urine, feces and pooled hair (n = 3) samples varied from 0.15 to 1.08 μg.L(-1), 16.09-75.01 μg.L(-1), 1.87-13.89 μg.g(-1) and 2.08-8.09 ng.g(-1), respectively. Significant correlations (r = 0.808-0.885; P < 0.001; N = 18) were found between FB1 intake and plasma FB1 on days 7, 14, 21 and 28...
July 18, 2017: Food and Chemical Toxicology
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