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https://www.readbyqxmd.com/read/27921453/integrating-ion-mobility-spectrometry-into-mass-spectrometry-based-exposome-measurements-what-can-it-add-and-how-far-can-it-go
#1
Thomas O Metz, Erin S Baker, Emma L Schymanski, Ryan S Renslow, Dennis G Thomas, Tim J Causon, Ian K Webb, Stephan Hann, Richard D Smith, Justin G Teeguarden
Measuring the exposome remains a challenge due to the range and number of anthropogenic molecules that are encountered in our daily lives, as well as the complex systemic responses to these exposures. One option for improving the coverage, dynamic range and throughput of measurements is to incorporate ion mobility spectrometry (IMS) into current MS-based analytical methods. The implementation of IMS in exposomics studies will lead to more frequent observations of previously undetected chemicals and metabolites...
January 2017: Bioanalysis
https://www.readbyqxmd.com/read/27918491/clarification-of-the-antagonistic-effect-of-the-lipopeptides-produced-by-bacillus-amyloliquefaciens-bpd1-against-pyricularia-oryzae-via-in-situ-maldi-tof-ims-analysis
#2
Jen-Hung Liao, Pi-Yu Chen, Yu-Liang Yang, Shu-Chen Kan, Feng-Chia Hsieh, Yung-Chang Liu
This study tried to clarify the antagonistic effect of the lipopeptides secreted by Bacillus amyloliquefaciens strain BPD1 (Ba-BPD1) against Pyricularia oryzae Cavara (PO). To determine the major antifungal lipopeptides effective against PO, single and dual cultures were carried out in solid-state media. The matrix-assisted laser desorption/ionization-time of flight imaging mass spectrometry (MALDI-TOF IMS) was used to identify the most effective lipopeptide in situ. Meanwhile, the morphology of pathogen fungi treated with lipopeptides was observed via the SEM...
December 3, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27911446/treatment-patterns-of-ranibizumab-intravitreal-injection-and-dexamethasone-intravitreal-implant-for-retinal-vein-occlusion-in-the-usa
#3
S Nghiem-Buffet, S Baillif, S Regnier, A Skelly, N Yu, A Sodi
PurposeRanibizumab, an anti-vascular endothelial growth factor, and dexamethasone, a corticosteroid, have been shown to be effective in treating macular oedema secondary to retinal vein occlusion (RVO) (central RVO (CRVO) and branch RVO (BRVO)). Their real-world usage, however, has yet to be compared. We therefore evaluated ophthalmology visits for both drugs using US patient-level data.MethodsThe IMS Health Real-World Data Medical Claims database was used to identify treatment-naive patients receiving ranibizumab intravitreal injections or dexamethasone intravitreal implants between June 2010 and February 2014 who had 12 months of follow-up data...
December 2, 2016: Eye
https://www.readbyqxmd.com/read/27910591/imaging-motional-stark-effect-measurements-at-asdex-upgrade
#4
O P Ford, A Burckhart, R McDermott, T Pütterich, R C Wolf
This paper presents an overview of results from the Imaging Motional Stark Effect (IMSE) diagnostic obtained during its first measurement campaign at ASDEX Upgrade since installation as a permanent diagnostic. A brief overview of the IMSE technique is given, followed by measurements of a standard H-mode discharge, which are compared to equilibrium reconstructions showing good agreement where expected. The development of special discharges for the calibration of pitch angle is reported and safety factor profile changes during sawteeth crashes are shown, which can be resolved to a few percent due to the high sensitivity at good time resolution of the new IMSE system...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27899520/is-adherence-to-the-american-college-of-chest-physicians-recommended-anticoagulation-treatment-duration-associated-with-different-outcomes-among-patients-with-venous-thromboembolism
#5
Alex C Spyropoulos, Ron Preblick, Winghan J Kwong, Melissa Lingohr-Smith, Jay Lin
Clinical and economic outcomes associated with venous thromboembolism (VTE) patient adherence to the American College of Chest Physicians (ACCP) anticoagulant (AC) treatment guidelines are incompletely understood. Patients with ≥1 inpatient or ≥2 separate outpatient claims for deep vein thrombosis and/or pulmonary embolism, based on International Classification of Diseases, Ninth Revision, Clinical Modification codes, were identified from the IMS PharMetrics Plus database. Patients had continuous insurance coverage for 12 months before (baseline) and after (follow-up) the index event (first VTE claim) but no baseline VTE claims...
November 28, 2016: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/27899518/variable-mr-and-pathologic-patterns-of-hemorrhage-after-iodinated-contrast-infusion-in-mca-occlusion-reperfusion-model
#6
Humberto Morales, Aigang Lu, Yuko Kurosawa, Joseph F Clark, Thomas Tomsick
OBJECTIVE: To examine the hypothesis that IA reperfusion with iso-osmolar iodixanol, low-osmolar iopamidol, or saline causes different effects on MR signal changes and pathologic cut-brain section related to hemorrhagic transformation (HT) or iodinated radiographic contrast media (IRCM) deposition. METHODS: Infarct was induced in 30 rats by middle cerebral artery suture occlusion. Reperfusion was performed after 5 hours with iso-osmolar iodixanol (n=9), low-osmolar iopamidol (n=12) or saline (n=9)...
November 29, 2016: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/27898220/intensive-care-physiotherapy-during-extracorporeal-membrane-oxygenation-for-acute-respiratory-distress-syndrome
#7
Laveena Munshi, Tadahiro Kobayashi, Julian DeBacker, Ravi Doobay, Teagan Telesnicki, Vincent Lo, Nathalie Cote, Marcelo Cypel, Shaf Keshavjee, Niall D Ferguson, Eddy Fan
RATIONALE: There are limited data on physiotherapy during extracorporeal membrane oxygenation (ECMO) for acute respiratory distress syndrome (ARDS). OBJECTIVES: We sought to characterize physiotherapy delivered to ARDS patients supported with ECMO, and to evaluate the association of this therapeutic modality with mortality. METHODS: We conducted a retrospective cohort study of all adult ARDS patients supported with ECMO at our institution from 2010-2015...
November 29, 2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/27895297/power-of-an-adaptive-trial-design-for-endovascular-stroke-studies-simulations-using-ims-interventional-management-of-stroke-iii-data
#8
Maarten G Lansberg, Ninad S Bhat, Sharon D Yeatts, Yuko Y Palesch, Joseph P Broderick, Gregory W Albers, Tze L Lai, Philip W Lavori
BACKGROUND AND PURPOSE: Adaptive trial designs that allow enrichment of the study population through subgroup selection can increase the chance of a positive trial when there is a differential treatment effect among patient subgroups. The goal of this study is to illustrate the potential benefit of adaptive subgroup selection in endovascular stroke studies. METHODS: We simulated the performance of a trial design with adaptive subgroup selection and compared it with that of a traditional design...
December 2016: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/27893669/cost-of-glaucoma-treatment-in-a-developing-country-over-a-5-year-period
#9
Gabriel Lazcano-Gomez, María de Los Angeles Ramos-Cadena, Margarita Torres-Tamayo, Alejandra Hernandez de Oteyza, Mauricio Turati-Acosta, Jesús Jimenez-Román
The aim of the study was to disclose a realistic estimate of primary open-angle glaucoma treatment, follow-up costs, and patients' monthly glaucoma-economic burden in an ophthalmology hospital in Mexico City.Prospective survey of 462 primary open-angle glaucoma patients from 2007 to 2012 was carried out. Costs from visits, glaucoma follow-up studies, laser, and glaucoma surgical procedures were obtained from hospital pricings. Education, employment, and monthly income were interrogated. Total cost was divided into hypotensive treatment cost, nonpharmacologic treatment cost (laser and surgeries), and follow-up studies and consults...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27891713/influence-of-glass-composition-on-sims-instrumental-mass-fractionation-for-si-and-ca-isotopic-analyses
#10
Laurent Tissandier, Claire Rollion-Bard
RATIONALE: In-situ SIMS analysis requires the use of standards to unravel the instrumental mass fractionation (IMF) induced by the analytical procedures. Part of this IMF might be caused by the nature of the sample and the differences in composition and structure between the sample and the standards. This "matrix effect" has been tentatively corrected for by using standards with chemical compositions equivalent to the samples, or by the empirical use of chemical parameters. However, these corrections can only be applied to a narrow compositional range and fail to take proper account of the matrix effect when a wider chemical field is tested...
November 28, 2016: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/27888142/profiling-and-identification-of-new-proteins-involved-in-brain-ischemia-using-maldi-imaging-mass-spectrometry
#11
Víctor Llombart, Sebastián Alejandro Trejo, Sílvia Bronsoms, Anna Morancho, Ma Feifei, Júlia Faura, Teresa García-Berrocoso, Alba Simats, Anna Rosell, Francesc Canals, Mar Hernández-Guillamón, Joan Montaner
: The identification of proteins involved in brain ischemia might allow the discovery of putative biomarkers or therapeutic targets for ischemic stroke. Our aim is to study the distribution of proteins within mouse brain after an ischemic insult using MALDI imaging-mass-spectrometry and to identify relevant proteins involved in brain damage. We occluded the middle cerebral artery of C57BL/6J mice. Brain slices were analyzed by MALDI-TOF and infarct (IC) and contralateral (CL) regions were compared using ClinProTools...
November 22, 2016: Journal of Proteomics
https://www.readbyqxmd.com/read/27886404/adipophilin-expression-in-cutaneous-malignant-melanoma
#12
Masakazu Fujimoto, Ibu Matsuzaki, Yuki Yamamoto, Akihiko Yoshizawa, Kenji Warigaya, Yoshifumi Iwahashi, Fumiyoshi Kojima, Fukumi Furukawa, Shin-Ichi Murata
BACKGROUND: The lipogenic pathway is upregulated in cancer cells, including melanomas. However, the pathological significance of cellular lipids in melanocytic lesions has yet to be determined. In this study, we evaluated intracytoplasmic lipid droplets in melanocytic nevi (MNs) and malignant melanomas via immunohistochemical analysis of adipophilin (ADP), which coats lipid droplets. METHODS: One hundred primary cutaneous melanocytic lesions (33 MNs, 17 melanomas in situ [MIS], and 50 invasive melanomas [IMs]) were immunostained for ADP...
November 25, 2016: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/27884771/rapid-detection-of-salmonella-in-raw-chicken-breast-using-real-time-pcr-combined-with-immunomagnetic-separation-and-whole-genome-amplification
#13
Ji-Yeon Hyeon, Xiangyu Deng
We presented the first attempt to combine immunomagnetic separation (IMS), whole genome amplification by multiple displacement amplification (MDA) and real-time PCR for detecting a bacterial pathogen in a food sample. This method was effective in enabling real-time PCR detection of low levels of Salmonella enterica Serotype Enteritidis (SE) (∼10 CFU/g) in raw chicken breast without culture enrichment. In addition, it was able to detect refrigeration-stressed SE cells at lower concentrations (∼0.1 CFU/g) in raw chicken breast after a 4-h culture enrichment, shortening the detection process from days to hours and displaying no statistical difference in detection rate in comparison with a culture-based detection method...
November 20, 2016: Food Microbiology
https://www.readbyqxmd.com/read/27882831/quantifying-differences-in-health-care-consumption-for-the-management-of-multiple-sclerosis-within-privately-and-publicly-insured-health-care-programs
#14
Terrie Livingston, Monica Fay, Ravi Iyer, Wendy Wells, Michael W Pill
BACKGROUND: Multiple sclerosis (MS) is a chronic and debilitating disease of the central nervous system that affects more than 570,000 persons in the United States and 2.3 million worldwide. Since most individuals experience initial symptoms between the ages of 20 and 40 years, MS can have a significant effect on health care consumption, quality of life, productivity, and employment over the long-term disease course. Opportunities exist to better understand how benefit design and other nonclinical factors can affect health care delivery and associated costs...
December 2016: Journal of Managed Care & Specialty Pharmacy
https://www.readbyqxmd.com/read/27879196/treatment-persistence-in-the-use-of-basal-insulins-in-poland-and-germany%C3%A2
#15
Wolfgang Rathmann, Marcin Czech, Edward Franek, Karel Kostev
AIMS: To compare short-term basal insulin therapy persistence and its predictors in Poland and Germany. METHODS: Persistence was defined as proportions of patients remaining on the initial basal insulin (analogs: Poland: n = 6,889, Germany: n = 454,067; neutral protamine Hagedorn (NPH) insulins: Poland: n = 50,761, Germany: n = 226,064) over 2 years based on nationwide prescription databases (LRx; IMS Health) in Poland and Germany from 2013 to 2015. Persistence was evaluated by Kaplan-Meier curves (log-rank tests)...
November 23, 2016: International Journal of Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/27873002/multimodal-detection-of-gm2-and-gm3-lipid-species-in-the-brain-of-mucopolysaccharidosis-type-ii-mouse-by-serial-imaging-mass-spectrometry-and-immunohistochemistry
#16
Martin Dufresne, Daniel Guneysu, Nathan Heath Patterson, Mieczyslaw Martin Marcinkiewicz, Anthony Regina, Michel Demeule, Pierre Chaurand
Mucopolysaccharidosis type II (Hunter's disease) mouse model (IdS-KO) was investigated by both imaging mass spectrometry (IMS) and immunohistochemistry (IHC) performed on the same tissue sections. For this purpose, IdS-KO mice brain sections were coated with sublimated 1,5-diaminonaphtalene and analyzed by high spatial resolution IMS (5 μm) and anti-GM3 IHC on the same tissue sections to characterize the ganglioside monosialated ganglioside (GM) deposits found in Hunter's disease. IMS analysis have found that two species of GM3 and GM2 that are only different due to the length of their fatty acid residue (stearic or arachidic residue) were overexpressed in the IdS-KO mice compared to a control mouse...
November 21, 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27869199/ion-mobility-spectrometry-as-a-simple-and-rapid-method-to-measure-the-plasma-propofol-concentrations-for-intravenous-anaesthesia-monitoring
#17
Xin Wang, Qinghua Zhou, Dandan Jiang, Yulei Gong, Enyou Li, Haiyang Li
The plasma propofol concentration is important information for anaesthetists to monitor and adjust the anaesthesia depth for patients during a surgery operation. In this paper, a stand-alone ion mobility spectrometer (IMS) was constructed for the rapid measurement of the plasma propofol concentrations. Without any sample pre-treatment, the plasma samples were dropped on a piece of glass microfiber paper and then introduced into the IMS cell by the thermal desorption directly. Each individual measurement could be accomplished within 1 min...
November 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27861899/sulfatide-species-with-various-fatty-acid-chains-in-oligodendrocytes-at-different-developmental-stages-determined-by-imaging-mass-spectrometry
#18
Yukie Hirahara, Taketoshi Wakabayashi, Tetsuji Mori, Taro Koike, Ikuko Yao, Masayuki Tsuda, Koichi Honke, Hitoshi Gotoh, Katsuhiko Ono, Hisao Yamada
HSO3-3-galactosylceramide (Sulfatide) species comprise the major glycosphingolipid components of oligodendrocytes and myelin and play functional roles in the regulation of oligodendrocyte maturation and myelin formation. Although various sulfatide species contain different fatty acids, it is unclear how these sulfatide species affect oligodendrogenesis and myelination. The O4 monoclonal antibody reaction with sulfatide has been widely used as a useful marker for oligodendrocytes and myelin. However, sulfatide synthesis during the pro-oligodendroblast stage, where differentiation into the oligodendrocyte lineage has already occurred, has not been examined...
November 12, 2016: Journal of Neurochemistry
https://www.readbyqxmd.com/read/27856724/variability-in-antibiotic-use-across-ontario-acute-care-hospitals
#19
Charlie Tan, Marian Vermeulen, Xuesong Wang, Rosemary Zvonar, Gary Garber, Nick Daneman
BACKGROUND: Antibiotic stewardship is a required organizational practice for Canadian acute care hospitals, yet data are scarce regarding the quantity and composition of antibiotic use across facilities. We sought to examine the variability, and risk-adjusted variability, in antibiotic use across acute care hospitals in Ontario, Canada's most populous province. METHODS: Antibiotic purchasing data from IMS Health, previously demonstrated to correlate strongly with internal antibiotic dispensing data, were acquired for 129 Ontario hospitals from January to December 2014 and linked to patient day (PD) denominator data from administrative datasets...
November 17, 2016: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/27855912/target-identification-of-volatile-metabolites-to-allow-the-differentiation-of-lactic-acid-bacteria-by-gas-chromatography-ion-mobility-spectrometry
#20
Janneth Gallegos, Cristina Arce, Rafael Jordano, Lourdes Arce, Luis M Medina
The purpose of this work was to study the potential of gas chromatography-ion mobility spectrometry (GC-IMS) to differentiate lactic acid bacteria (LAB) through target identification and fingerprints of volatile metabolites. The LAB selected were used as reference strains for their influence in the flavour of cheese. The four strains of LAB can be distinguished by the fingerprints generated by the volatile organic compounds (VOCs) emitted. 2-butanone, 2-pentanone, 2-heptanone and 3-methyl-1-butanol were identified as relevant VOCs for Lactobacillus casei and Lactobacillus paracasei subsp...
April 1, 2017: Food Chemistry
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