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https://www.readbyqxmd.com/read/28224246/comparison-of-veterinary-drug-residue-results-in-animal-tissues-by-ultrahigh-performance-liquid-chromatography-coupled-to-triple-quadrupole-or-quadrupole-time-of-flight-tandem-mass-spectrometry-after-different-sample-preparation-methods-including-use-of-a-commercial
#1
Tarun Anumol, Steven J Lehotay, Joan Stevens, Jerry Zweigenbaum
Veterinary drug residues in animal-derived foods must be monitored to ensure food safety, verify proper veterinary practices, enforce legal limits in domestic and imported foods, and for other purposes. A common goal in drug residue analysis in foods is to achieve acceptable monitoring results for as many analytes as possible, with higher priority given to the drugs of most concern, in an efficient and robust manner. The U.S. Department of Agriculture has implemented a multiclass, multi-residue method based on sample preparation using dispersive solid phase extraction (d-SPE) for cleanup and ultrahigh-performance liquid chromatography-tandem quadrupole mass spectrometry (UHPLC-QQQ) for analysis of >120 drugs at regulatory levels of concern in animal tissues...
February 21, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28218403/unveiling-gene-trait-relationship-by-cross-platform-meta-analysis-on-chinese-hamster-ovary-cell-transcriptome
#2
Liang Zhao, Hsu-Yuan Fu, Ravali Raju, Nandita Vishwanathan, Wei-Shou Hu
In the past few years, transcriptome analysis has been increasingly employed to better understand the physiology of Chinese hamster ovary (CHO) cells at a global level. As more transcriptome data accumulated, meta-analysis on data sets collected from various sources can potentially provide better insights on common properties of those cells. Here, we performed meta-analysis on transcriptome data of different CHO cell lines obtained using NimbleGen or Affymetrix microarray platforms. Hierarchical clustering, non-negative matrix factorization (NMF) analysis, and principal component analysis (PCA) accordantly showed the samples were clustered into two groups: one consists of adherent cells in serum-containing medium, and the other suspension cells in serum-free medium...
February 20, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28192965/advantages-of-data-fusion-first-multivariate-curve-resolution-analysis-of-fused-liquid-chromatographic-second-order-data-with-dual-diode-array-fluorescent-detection
#3
Rocío B Pellegrino Vidal, Gabriela A Ibañez, Graciela M Escandar
For the first time, liquid chromatography-diode array detection (LC-DAD) and liquid-chromatography fluorescence detection (LC-FLD) second-order data, collected in a single chromatographic run, were fused and chemometrically processed for the quantitation of coeluting analytes. Two different experimental mixtures composed of fluorescent and nonfluorescent endocrine disruptors were analyzed. Adequate pretreatment of the matrices before their fusion was crucial to attain reliable results. Multivariate curve resolution-alternating least-squares (MCR-ALS) was applied to LC-DAD, LC-FLD, and fused LC-DAD-FLD data...
February 15, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28181144/novel-bone-metabolism-associated-hormones-the-importance-of-the-pre-analytical-phase-for-understanding-their-physiological-roles
#4
REVIEW
Giovanni Lombardi, Mosè Barbaro, Massimo Locatelli, Giuseppe Banfi
The endocrine function of bone is now a recognized feature of this tissue. Bone-derived hormones that modulate whole-body homeostasis, are being discovered as for the effects on bone of novel and classic hormones produced by other tissues become known. Often, however, the data regarding these last generation bone-derived or bone-targeting hormones do not give about a clear picture of their physiological roles or concentration ranges. A certain degree of uncertainty could stem from differences in the pre-analytical management of biological samples...
February 8, 2017: Endocrine
https://www.readbyqxmd.com/read/28176530/effects-of-castration-on-penile-extracellular-matrix-morphology-in-domestic-cats
#5
Nathalia Cs Borges, Marco A Pereira-Sampaio, Vivian Alves Pereira, Marcelo Abidu-Figueiredo, Maurício Alves Chagas
Objectives This study was undertaken to verify the possible modifications caused by hormonal deprivation in the extracellular matrix in the penises of neutered cats. Methods Twenty-seven penises from domestic shorthair cats were collected: 14 samples from intact cats and 13 from neutered cats. Sections were stained with Weigert's resorcin-fuchsin, hematoxylin and eosin, and picrosirius red. Histomorphometric analysis was performed using light microscopy and image analysis software. The following parameters were analyzed: density of the elastic fibers and collagen fibers in the corpus spongiosum; density of the elastic fibers in the tunica albuginea of the corpus cavernosum and the tunica albuginea of the corpus spongiosum; luminal area of the urethra; area of the corpus spongiosum; area of the corpus cavernosum; and thickness of the urethral epithelium...
February 1, 2017: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/28173811/marrow-adipocytes-inhibit-the-differentiation-of-mesenchymal-stem-cells-into-osteoblasts-via-suppressing-bmp-signaling
#6
Basem M Abdallah
BACKGROUND: Reduced bone formation is associated with increased bone marrow fat in many bone-loss related diseases including aging, post-menopause, and anorexia nervosa. Several lines of evidence suggested the regulation of osteogenesis and adipogenesis of the bone marrow-derived mesenchymal (skeletal) stem cells (BMSCs) by paracrine mediators. This study aimed to investigate the impact of adipocytes-secreted factors on the cell proliferation and osteoblast differentiation of BMSCs. METHODS: Serum free conditioned medium (CM-Adipo) was collected from stromal ST2 cells-derived adipocytes...
February 7, 2017: Journal of Biomedical Science
https://www.readbyqxmd.com/read/28169420/parents-and-informal-caregivers-views-and-experiences-of-communication-about-routine-childhood-vaccination-a-synthesis-of-qualitative-evidence
#7
REVIEW
Heather Mr Ames, Claire Glenton, Simon Lewin
BACKGROUND: Childhood vaccination is an effective way to prevent serious childhood illnesses, but many children do not receive all the recommended vaccines. There are various reasons for this; some parents lack access because of poor quality health services, long distances or lack of money. Other parents may not trust vaccines or the healthcare workers who provide them, or they may not see the need for vaccination due to a lack of information or misinformation about how vaccinations work and the diseases they can prevent...
February 7, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28158941/high-throughput-quantitation-of-proline-betaine-in-foods-and-suitability-as-valid-biomarker-for-citrus-consumption
#8
Roman Lang, Tatjana Lang, Matthias Bader, Anja Beusch, Verena Schlagbauer, Thomas Hofmann
Proline betaine has been proposed as a candidate dietary biomarker for citrus intake. To validate its suitability as dietary biomarker and to gain insight into the range of this per-methylated amino acids in foods and beverages, a quick and accurate stable isotope dilution assay was developed for quantitative high-throughput HILIC-MS/MS screening of proline betaine in foods and urine after solvent-mediated matrix precipitation. Quantitative analysis of a variety of foods confirmed substantial amounts of proline betaine in citrus juices (140 - 1100 mg/L) and revealed high abundance in tubers of the vegetable Stachys affinis, also known as Chinese artichocke (~700 mg/kg)...
February 3, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28157149/improved-methods-for-fire-risk-assessment-in-low-income-and-informal-settlements
#9
REVIEW
John Twigg, Nicola Christie, James Haworth, Emmanuel Osuteye, Artemis Skarlatidou
Fires cause over 300,000 deaths annually worldwide and leave millions more with permanent injuries: some 95% of these deaths are in low- and middle-income countries. Burn injury risk is strongly associated with low-income and informal (or slum) settlements, which are growing rapidly in an urbanising world. Fire policy and mitigation strategies in poorer countries are constrained by inadequate data on incidence, impacts, and causes, which is mainly due to a lack of capacity and resources for data collection, analysis, and modelling...
February 1, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28147291/source-apportionment-of-ambient-fine-and-coarse-particulate-matter-at-the-fort-mckay-community-site-in-the-athabasca-oil-sands-region-alberta-canada
#10
Matthew S Landis, J Patrick Pancras, Joseph R Graney, Emily M White, Eric S Edgerton, Allan Legge, Kevin E Percy
An ambient air particulate matter sampling study was conducted at the Wood Buffalo Environmental Association (WBEA) AMS-1 Fort McKay monitoring station in the Athabasca Oil Sand Region (AOSR) in Alberta, Canada from February 2010 to July 2011. Daily 24h integrated fine (PM2.5) and coarse (PM10-2.5) particulate matter was collected using a sequential dichotomous sampler. Over the duration of the study, 392 valid daily dichotomous PM2.5 and PM10-2.5 sample pairs were collected with concentrations of 6.8±12.9μgm(-3) (mean±standard deviation) and 6...
January 29, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28143486/consistent-metagenomic-biomarker-detection-via-robust-pca
#11
Mustafa Alshawaqfeh, Ahmad Bashaireh, Erchin Serpedin, Jan Suchodolski
BACKGROUND: Recent developments of high throughput sequencing technologies allow the characterization of the microbial communities inhabiting our world. Various metagenomic studies have suggested using microbial taxa as potential biomarkers for certain diseases. In practice, the number of available samples varies from experiment to experiment. Therefore, a robust biomarker detection algorithm is needed to provide a set of potential markers irrespective of the number of available samples...
January 31, 2017: Biology Direct
https://www.readbyqxmd.com/read/28132185/spatial-metabolite-profiling-by-matrix-assisted-laser-desorption-ionization-mass-spectrometry-imaging
#12
Berin A Boughton, Brett Hamilton
Mass spectrometry imaging (MSI) is rapidly maturing as an advanced method for spatial metabolite profiling. Herein, we provide an introduction to MSI including types of instrumentation, detailed sample preparation, data collection, overview of data analysis steps, software, common standards, and new developments. Further, we provide an overview of MSI in the clinical space over the past 3 years where MSI has been deployed in diverse research areas including cancer, neurobiology, lipidomics, and metabolite profiling and mapping to name only a few...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28129490/the-cutaneous-and-systemic-findings-associated-with-nuclear-matrix-protein-2-antibodies-in-adult-dermatomyositis-patients
#13
Anna Rogers, Lorinda Chung, Shufeng Li, Livia Casciola-Rosen, David F Fiorentino
OBJECTIVE: To characterize the cutaneous and systemic clinical phenotype of dermatomyositis patients with anti-NXP-2 antibodies. METHODS: We conducted a retrospective cohort analysis of 178 dermatomyositis patients seen at the Stanford University Clinic. Electronic chart review employing a keyword search strategy was performed to collect clinical and laboratory data. Anti-NXP-2 antibodies were assayed by immunoprecipitation using NXP-2 produced by in vitro transcription/translation...
January 27, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28124778/rapid-maldi-biotyper-based-identification-and-cluster-analysis-of-streptococcus-iniae
#14
Si Won Kim, Seong Won Nho, Se Pyeong Im, Jung Seok Lee, Jae Wook Jung, Jassy Mary S Lazarte, Jaesung Kim, Woo-Jai Lee, Jeong-Ho Lee, Tae Sung Jung
Streptococcus iniae causes severe mortalities among cultured marine species, especially in the olive flounder (Paralichthys olivaceus), which is economically important in Korea and Japan. Recently, there has been growing concern regarding the emergence of S. iniae as a zoonotic pathogen. Here, 89 S. iniae isolates obtained from diseased olive flounders collected from 2003 to 2008 in Jeju Island, South Korea, were characterized using matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS)...
January 26, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28117811/high-pressure-single-crystal-diffraction-at-px-2
#15
Dongzhou Zhang, Przemyslaw K Dera, Peter J Eng, Joanne E Stubbs, Jin S Zhang, Vitali B Prakapenka, Mark L Rivers
In this report we describe detailed procedures for carrying out single crystal X-ray diffraction experiments with a diamond anvil cell (DAC) at the GSECARS 13-BM-C beamline at the Advanced Photon Source. The DAC program at 13-BM-C is part of the Partnership for Extreme Xtallography (PX^2) project. BX-90 type DACs with conical-type diamond anvils and backing plates are recommended for these experiments. The sample chamber should be loaded with noble gas to maintain a hydrostatic pressure environment. The sample is aligned to the rotation center of the diffraction goniometer...
January 16, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28114903/a-systematic-comparative-evaluation-of-biclustering-techniques
#16
Victor A Padilha, Ricardo J G B Campello
BACKGROUND: Biclustering techniques are capable of simultaneously clustering rows and columns of a data matrix. These techniques became very popular for the analysis of gene expression data, since a gene can take part of multiple biological pathways which in turn can be active only under specific experimental conditions. Several biclustering algorithms have been developed in the past recent years. In order to provide guidance regarding their choice, a few comparative studies were conducted and reported in the literature...
January 23, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28108404/annulus-fibrosus-cells-express-and-utilize-c-c-chemokine-receptor-5-ccr5-for-migration
#17
Weijun Liu, David Liu, Justin Zheng, Peng Shi, Po-Hsin Chou, Chundo Oh, Di Chen, Howard S An, Ana Chee
BACKGROUND CONTEXT: Disc degeneration is associated with the progressive loss of the proteoglycan content of the intervertebral disc, decreased matrix synthesis, higher concentrations of proteolytic enzymes, and increased levels of proinflammatory cytokines. In previous studies, we have shown that C-C chemokine ligand (CCL)2, CCL3, and CCL5 are highly expressed by cultured nucleus pulposus (NP) and annulus fibrosus (AF) cells that have been treated by interleukin-1. The major function of these chemokines is to recruit immune cells into the disc...
January 17, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28101367/contribution-of-point-and-small-scaled-sources-to-the-pm10-emission-using-positive-matrix-factorization-model
#18
Zohre Farahmandkia, Faramarz Moattar, Farid Zayeri, Mohamad Sadegh Sekhavatjou, Nabiollah Mansouri
BACKGROUND: The positive matrix factorization is a powerful environmental analysis technique which has been successfully utilized to assess air-born particulate matter source contribution. The new version of this model (PMF5) has two additional estimation error methods and some other useful advantages compared to the previous versions. In the present study, the capability of PMF5 for identification and contribution of small size particle source to the ambient particulate matter was evaluated...
2017: Journal of Environmental Health Science & Engineering
https://www.readbyqxmd.com/read/28101236/identification-of-proteins-associated-with-pediatric-bilateral-wilms-tumor
#19
Zechen Yan, Qingjun Meng, Jinjian Yang, Junjie Zhang, Wei Zhao, Fei Guo, Dongjian Song, Yuxiao Zhan, Dandan Fan, Ruiyi Zhou, Shuqiang Zuo, Zehua Wang, Jiekai Yu, Shu Zheng, Jiaxiang Wang
Wilms tumor (WT) is the most common cancer that primarily develops in abdominal solid organ of children. It has no incipient symptom, and the most frequent symptoms are a painless, palpable abdominal mass. Proteomics technology was used to select the differentially expressed proteins of bilateral Wilms tumor (BWT). Ten serum samples of children with BWT were chosen, 20 serum samples of children with unilateral WT (UWT) and 20 serum samples of healthy children were selected, and proteomics technology was used to detect and collect data...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28097088/icariin-ameliorates-iga-nephropathy-by-inhibition-of-nuclear-factor-kappa-b-nlrp3-pathway
#20
Lei Zhang, Xing-Zhi Wang, Yu-Shu Li, Lei Zhang, Li-Rong Hao
Immunoglobulin A nephropathy (IgAN) is the most frequent form of glomerulonephritis, which is characterized by glomerular proliferation and renal inflammation. Icariin is a flavonoid from the Chinese herb Epimedium, and its anti-inflammatory effect has been reported. This study aimed to investigate the effects of icariin on the renal damage in IgAN rats and the mechanisms behind these effects. IgAN model was established in Sprague-Dawley rats by oral and intravenous immunization with bovine gamma-globulin for 12 weeks, and rats were treated with icariin from 12 to 18 weeks...
January 2017: FEBS Open Bio
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