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https://www.readbyqxmd.com/read/28350940/recent-and-emerging-advances-in-spinal-deformity
#1
Justin S Smith, Christopher I Shaffrey, Shay Bess, Mohammed F Shamji, Darrel Brodke, Lawrence G Lenke, Michael G Fehlings, Virginie Lafage, Frank Schwab, Alexander R Vaccaro, Christopher P Ames
BACKGROUND: Over the last several decades, significant advances have occurred in the assessment and management of spinal deformity. OBJECTIVE: The primary focus of this narrative review is on recent advances in adult thoracic, thoracolumbar, and lumbar deformities, with additional discussions of advances in cervical deformity and pediatric deformity. METHODS: A review of recent literature was conducted. RESULTS: Advances in adult thoracic, thoracolumbar, and lumbar deformities reviewed include the growing applications of stereoradiography, development of new radiographic measures and improved understanding of radiographic alignment objectives, increasingly sophisticated tools for radiographic analysis, strategies to reduce the occurrence of common complications, and advances in minimally invasive techniques...
March 1, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28350935/screening-for-celiac-disease-evidence-report-and-systematic-review-for-the-us-preventive-services-task-force
#2
Roger Chou, Christina Bougatsos, Ian Blazina, Katherine Mackey, Sara Grusing, Shelley Selph
Importance: Silent or subclinical celiac disease may result in potentially avoidable adverse health consequences. Objective: To review the evidence on benefits and harms of screening for celiac disease in asymptomatic adults, adolescents, and children 3 years and older for the US Preventive Services Task Force. Data Sources: Ovid MEDLINE, Cochrane Central Register of Controlled Trials, and Cochrane Database of Systematic Reviews, searched to June 14, 2016...
March 28, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28350898/leading-antibacterial-laboratory-research-by-integrating-conventional-and-innovative-approaches-the-laboratory-center-of-the-antibacterial-resistance-leadership-group
#3
Claudia Manca, Carol Hill, Andrea M Hujer, Robin Patel, Scott R Evans, Robert A Bonomo, Barry N Kreiswirth
The Antibacterial Resistance Leadership Group (ARLG) Laboratory Center (LC) leads the evaluation, development, and implementation of laboratory-based research by providing scientific leadership and supporting standard/specialized laboratory services. The LC has developed a physical biorepository and a virtual biorepository. The physical biorepository contains bacterial isolates from ARLG-funded studies located in a centralized laboratory and they are available to ARLG investigators. The Web-based virtual biorepository strain catalogue includes well-characterized gram-positive and gram-negative bacterial strains published by ARLG investigators...
March 15, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28350460/time-dependent-model-for-fluid-flow-in-porous-materials-with-multiple-pore-sizes
#4
Brian M Cummins, Rukesh Chinthapatla, Frances S Ligler, Glenn M Walker
An understanding of fluid transport through porous materials is critical for the development of lateral flow assays and analytical devices based on paper microfluidics. Models of fluid transport within porous materials often assume a single capillary pressure and permeability value for the material, implying that the material comprises a single pore size and that the porous material is fully saturated behind the visible wetted front. As a result, current models can lead to inaccuracies when modeling transport over long distances and/or times...
March 28, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28350444/bottom-up-elucidation-of-glycosidic-bond-stereochemistry
#5
Christopher John Gray, Baptiste Schindler, Lukasz G Migas, Martina Picmanova, Abdul-Rahman Allouche, Anthony P Green, Santanu Mandal, Mohammed Saddik Motawia, Raquel Sánchez-Pérez, Nanna Bjarnholt, Birger Lindberg Møller, Anouk M Rijs, Perdita E Barran, Isabelle Compagnon, Claire E Eyers, Sabine L Flitsch
The lack of robust, high-throughput and sensitive analytical strategies that can conclusively map the structure of glycans has significantly hampered progress in fundamental and applied aspects of glycoscience. Resolution of the anomeric α/β glycan linkage within oligosaccharides remains a particular challenge. Here, we show that 'memory' of anomeric configuration is retained following gas-phase glycosidic bond fragmentation during tandem mass spectrometry (MS2). These findings allow for integration of MS2 with ion mobility spectrometry (IM-MS2) and lead The to a strategy to distinguish α- and β-linkages within natural underivatised carbohydrates...
March 28, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28346887/high-resolution-mass-spectrometry-as-an-alternative-detection-method-to-tandem-mass-spectrometry-for-the-analysis-of-endogenous-steroids-in-serum
#6
Federico Ponzetto, Julien Boccard, Norbert Baume, Tiia Kuuranne, Serge Rudaz, Martial Saugy, Raul Nicoli
Recently, steroid hormones quantification in blood showed a promising ability to detect testosterone doping and interesting complementarities with the urinary module of the Athlete Biological Passport (ABP). In this work, an ultra-high pressure liquid chromatography-high-resolution mass spectrometry (UHPLC-HRMS) method was developed for the quantification of eleven endogenous steroids in serum. The performance of the full scan and targeted SIM acquisition modes was evaluated and compared to the performance of tandem mass spectrometry (MS/MS)...
March 18, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28346886/simultaneous-determination-of-amitraz-chlordimeform-formetanate-and-their-main-metabolites-in-human-urine-by-high-performance-liquid-chromatography-tandem-mass-spectrometry
#7
Xue Gao, Yanglan Tan, Hao Guo
A rapid, simple and reliable high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method was developed for simultaneous determination of amitraz, chlordimeform, formetanate and their main metabolites, N-(2,4-dimethylphenyl)-N-methyl-formamidine (DMPF), 2,4-dimethylformamidine (DMF), 2,4-dimethylaniline (DMA), 4-chloro-2-methylaniline and 3-hydroxyacetanilide in human urine. The urine samples were mixed with buffer solutions (pH 8) and subsequently cleaned up by solid supported liquid/liquid extraction (SLE)...
March 11, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28346885/plasma-and-brain-pharmacokinetics-of-ganoderic-acid-a-in-rats-determined-by-a-developed-uflc-ms-ms-method
#8
Fang-Rui Cao, Bing-Xin Xiao, Li-Sha Wang, Xue Tao, Ming-Zhu Yan, Rui-Le Pan, Yong-Hong Liao, Xin-Min Liu, Qi Chang
Ganoderic acid A (GAA), an active triterpenoid of the traditional Chinese herbal medicine Lingzhi, has been reported to exhibit antinociceptive, antioxidative, and anti-cancer activities. The present study aims to establish a sensitive and rapid UPLC-MS/MS method for studying the plasma and brain pharmacokinetics of GAA in rats. The analytes were separated on a C18 column eluted with a gradient mobile phase consisting of acetonitrile and 0.1% aqueous formic acid at 0.3mL/min. The eluate was monitored by a mass detector using an MRM (m/z, 515...
March 11, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28346883/identification-and-characterization-of-a-thermally-cleaved-fragment-of-monoclonal-antibody-a-detected-by-sodium-dodecyl-sulfate-capillary-gel-electrophoresis
#9
Kei Kubota, Naoki Kobayashi, Masayuki Yabuta, Motomu Ohara, Toyohiro Naito, Takuya Kubo, Koji Otsuka
This report describes a novel, comprehensive approach to identifying a fragment peak of monoclonal antibody-A (mAb-A), detected by sodium dodecyl sulfate-capillary gel electrophoresis (SDS-cGE). The fragment migrated close to the internal standard (10kDa marker) of SDS-cGE and increased about 0.5% under a 25°C condition for 6 months. Generally, identification of fragments observed in SDS-cGE is challenging to carry out due to the difficulty of collecting analytical amounts of fractionations from the capillary...
March 18, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28346882/determination-of-prodrug-treosulfan-and-its-biologically-active-monoepoxide-in-rat-plasma-liver-lungs-kidneys-muscle-and-brain-by-hplc-esi-ms-ms-method
#10
Michał Romański, Anna Kasprzyk, Artur Teżyk, Agnieszka Widerowska, Czesław Żaba, Franciszek Główka
A prodrug treosulfan (TREO) is currently investigated in clinical trials for conditioning prior to hematopoietic stem cell transplantation. Bioanalysis of TREO and its active derivatives, monoepoxide (S,S-EBDM) and diepoxide, in plasma and urine underlay the pharmacokinetic studies of these compounds but cannot explain an organ pharmacological action or toxicity. Recently, distribution of TREO and S,S-EBDM into brain, cerebrospinal fluid, and aqueous humor of the eye has been investigated in animal models and the obtained results presented clinical relevance...
March 18, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28346880/human-exposure-to-bisphenol-a-and-liver-health-status-quantification-of-urinary-and-circulating-levels-by-lc-ms-ms
#11
Carla Nicolucci, Sonia Errico, Alessandro Federico, Marcello Dallio, Carmelina Loguercio, Nadia Diano
A selective and highly sensitive analytical methodology for determination of Bisphenol A in human plasma was developed and validated. The method was based on selective liquid/solid extraction, combined with liquid chromatography-electrospray ionization tandem mass spectrometry in the multiple reaction monitoring mode and negative ionization. The linearity of the detector response was verified in human plasma over the concentration range 0.100-200ngmL(-1). The detection limit was 0.03ngmL(-1) and the quantification limit was 0...
March 10, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28346861/biomimetic-remineralization-of-carious-lesions-by-self-assembling-peptide
#12
L Kind, S Stevanovic, S Wuttig, S Wimberger, J Hofer, B Müller, U Pieles
Caries is the most common disease in the world. Great efforts have been undertaken for prevention and to identify a regenerative treatment solution for dental caries. Self-assembling β-sheet forming peptides have previously shown to form 3-dimensional fiber networks supporting tissue regeneration. In particular, the self-assembling peptide P11-4 has shown potential in the treatment and prevention of dental caries. It has previously been shown that application of monomeric P11-4 solution to early carious lesions can increase net mineral gain by forming de novo hydroxyapatite crystals...
March 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28346746/simultaneous-determination-of-4-hydroxyphenyl-lactic-acid-4-hydroxyphenyl-acetic-acid-and-3-4-hydroxyphenyl-propionic-acid-in-human-urine-by-ultra-high-performance-liquid-chromatography-with-fluorescence-detection
#13
Yongli Yang, Fan Liu, Yiqun Wan
A simple and reliable method was established for simultaneous determination of 4-hydroxyphenyl acetic acid, 4-hydroxyphenyl lactic acid, and 3-4-hydroxyphenyl propionic acid in human urine by high-performance liquid chromatography with fluorescence detection. Solid-phase extraction was used to eliminate the interferences in urine. The separation of three analytes was achieved using a C18 column and a mobile phase formed by a 95:5 v/v mixture of 50 mmol/L ammonium acetate buffer at pH 6.8 that contained 5 mmol/L tetrabutyl ammonium bromide and acetonitrile...
March 27, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28346717/characterization-of-two-novel-antimicrobial-peptides-from-the-cuticular-extracts-of-the-ant-trichomyrmex-criniceps-mayr-hymenoptera-formicidae
#14
Nagachaitanya Bhagavathula, Venkateshwarlu Meedidoddi, Simon Bourque, Reshmy Vimaladevi, Santoshkumar Kesavakurup, Dayanandan Selvadurai, Sameer Shrivastava, Chandrashekara Krishnappa
Antimicrobial peptides (AMPs) from cuticular extracts of worker ants of Trichomyrmex criniceps (Mayr, Hymenoptera: Formicidae) were isolated and evaluated for their antimicrobial activity. Eight peptides ranging in mass from 804.42 to 1541.04 Da were characterized using a combination of analytical and bioinformatics approach. All the eight peptides were novel with no similarity to any of the AMPs archived in the Antimicrobial Peptide Database. Two of the eight novel peptides, the smallest and the largest by mass were named Crinicepsin-1 and Crinicepsin-2 and were chemically synthesized by solid phase peptide synthesis...
March 27, 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28346525/modeling-timelines-for-translational-science-in-cancer-the-impact-of-technological-maturation
#15
Laura M McNamee, Fred D Ledley
This work examines translational science in cancer based on theories of innovation that posit a relationship between the maturation of technologies and their capacity to generate successful products. We examined the growth of technologies associated with 138 anticancer drugs using an analytical model that identifies the point of initiation of exponential growth and the point at which growth slows as the technology becomes established. Approval of targeted and biological products corresponded with technological maturation, with first approval averaging 14 years after the established point and 44 years after initiation of associated technologies...
2017: PloS One
https://www.readbyqxmd.com/read/28346500/night-time-lights-a-global-long-term-look-at-links-to-socio-economic-trends
#16
Jeremy Proville, Daniel Zavala-Araiza, Gernot Wagner
We use a parallelized spatial analytics platform to process the twenty-one year totality of the longest-running time series of night-time lights data-the Defense Meteorological Satellite Program (DMSP) dataset-surpassing the narrower scope of prior studies to assess changes in area lit of countries globally. Doing so allows a retrospective look at the global, long-term relationships between night-time lights and a series of socio-economic indicators. We find the strongest correlations with electricity consumption, CO2 emissions, and GDP, followed by population, CH4 emissions, N2O emissions, poverty (inverse) and F-gas emissions...
2017: PloS One
https://www.readbyqxmd.com/read/28346358/genomic-evidence-for-bacterial-determinants-influencing-obesity-development
#17
Raphael D Isokpehi, Shaneka S Simmons, Matilda O Johnson, Marinelle Payton
Obesity is a major global public health problem requiring multifaceted interventional approaches including dietary interventions with probiotic bacteria. High-throughput genome sequencing of microbial communities in the mammalian gastrointestinal system continues to present diverse protein function information to understand the bacterial determinants that influence obesity development. The goal of the research reported in this article was to identify biological processes in probiotic bacteria that could influence the mechanisms for the extraction of energy from diet in the human gastrointestinal system...
March 26, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28346211/stability-of-two-antifungal-agents-fluconazole-and-miconazole-compounded-in-humco-recura-topical-cream-to-determine-beyond-use-date
#18
Pradeep Gautam, Bob Light, Troy Purvis
A novel compounding vehicle (RECURA) has previously been proven to penetrate the nail bed when compounded with the antifungal agent miconazole or fluconazole, providing for an effective treatment for onychomycosis. In this study, miconazole and fluconazole were compounded separately in RECURA compounding cream, and they were tested at different time points (0, 7, 14, 28, 45, 60, 90, and 180 days) to determine the beyond-use date of those formulations. The beyond-use date testing of both formulations (10% miconazole in RECURA and 10% fluconazole in RECURA) proved them to be physically, chemically, and microbiologically stable under International Conference of Harmonisation controlled room temperature (25°C ± 2°C/60% RH ±5%) for at least 180 days from the date of compounding...
March 2017: International Journal of Pharmaceutical Compounding
https://www.readbyqxmd.com/read/28346196/analytic-methods-used-in-quality-control-in-a-compounding-pharmacy
#19
Loyd V Allen
Analytical testing will no doubt become a more important part of pharmaceutical compounding as the public and regulatory agencies demand increasing documentation of the quality of compounded preparations. Compounding pharmacists must decide what types of testing and what amount of testing to include in their quality-control programs, and whether testing should be done in-house or outsourced. Like pharmaceutical compounding, analytical testing should be performed only by those who are appropriately trained and qualified...
January 2017: International Journal of Pharmaceutical Compounding
https://www.readbyqxmd.com/read/28346122/non-targeted-metabolomics-in-sport-and-exercise-science
#20
Liam M Heaney, Kevin Deighton, Toru Suzuki
Metabolomics incorporates the study of metabolites that are produced and released through physiological processes at both the systemic and cellular levels. Biological compounds at the metabolite level are of paramount interest in the sport and exercise sciences, although research in this field has rarely been referred to with the global 'omics terminology. Commonly studied metabolites in exercise science are notably within cellular pathways for adenosine triphosphate production such as glycolysis (e.g., pyruvate and lactate), β-oxidation of free fatty acids (e...
March 27, 2017: Journal of Sports Sciences
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