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https://www.readbyqxmd.com/read/28934305/the-prognostic-value-of-interleukin-17-in-lung-cancer-a-systematic-review-with-meta-analysis-based-on-chinese-patients
#1
Xiao-Fei Wang, Yi-Tong Zhu, Jia-Jia Wang, Da-Xiong Zeng, Chuan-Yong Mu, Yan-Bin Chen, Wei Lei, Ye-Han Zhu, Jian-An Huang
BACKGROUND: Interleukin-17 (IL-17) plays an important role in cancer progression. Previous studies remained controversial regarding the correlation between IL-17 expression and lung cancer (LC) prognosis. To comprehensively and quantitatively summarize the prognostic value of IL-17 expression in LC patients, a systematic review and meta-analysis were performed. METHODS: We identified the relevant literatures by searching the PubMed, EMBASE, Cochrane Library, SinoMed, China National Knowledge Infrastructure (CNKI) and Wanfang Data databases, up until April 1, 2017...
2017: PloS One
https://www.readbyqxmd.com/read/28918145/short-communication-relationship-between-methods-for-measurement-of-serum-electrolytes-and-the-relationship-between-ionized-and-total-calcium-and-neutrophil-oxidative-burst-activity-in-early-postpartum-dairy-cows
#2
B M Leno, E M Martens, M J B Felippe, K P Zanzalari, J C Lawrence, T R Overton
The objectives of this study were to (1) compare a test for serum measurement of total Ca (tCa), Mg, and P (VetTest Chemistry Analyzer, IDEXX Laboratories Inc., Westbrook, ME) to reference methods (spectrophotometric assays on a Beckman Coulter 640e automated clinical chemistry analyzer; Beckman Coulter, Brea, CA), (2) determine the relationship between ionized Ca (iCa) and reference method tCa in the immediate postpartum period, and (3) assess the relative value of these blood Ca indices as predictors of neutrophil oxidative burst activity...
September 13, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28918132/assessing-precision-bias-and-sigma-metrics-of-53-measurands-of-the-alinity-ci-system
#3
Sten Westgard, Victoria Petrides, Sharon Schneider, Marvin Berman, Jörg Herzogenrath, Anthony Orzechowski
Assay performance is dependent on the accuracy and precision of a given method. These attributes can be combined into an analytical Sigma-metric, providing a simple value for laboratorians to use in evaluating a test method's capability to meet its analytical quality requirements. Sigma-metrics were determined for 37 clinical chemistry assays, 13 immunoassays, and 3 ICT methods on the Alinity ci system. METHODS: Analytical Performance Specifications were defined for the assays, following a rationale of using CLIA goals first, then Ricos Desirable goals when CLIA did not regular the method, and then other sources if the Ricos Desirable goal was unrealistic...
September 13, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28912146/cerenkov-activated-sticky-tag-for-in-vivo-fluorescence-imaging
#4
Sudeep Das, Katja Haedicke, Jan Grimm
A big challenge for the clinical utilization of Cerenkov luminescence (CL) imaging is its low signal intensity, which is several orders of magnitude below ambient light. Consequently, highly sensitive cameras, sufficient shielding from background light and long acquisition times are required. To alleviate this problem, we hypothesize a strategy to convert the weak CL signal into a stronger fluorescence signal by using CL-activated formation of nitrenes from azides to locally fix a fluorescent probe in tissue by the formation of a covalent bond...
September 14, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28902615/irregular-analytical-errors-in-diagnostic-testing-a-novel-concept
#5
Michael Vogeser, Christoph Seger
BACKGROUND: In laboratory medicine, routine periodic analyses for internal and external quality control measurements interpreted by statistical methods are mandatory for batch clearance. Data analysis of these process-oriented measurements allows for insight into random analytical variation and systematic calibration bias over time. However, in such a setting, any individual sample is not under individual quality control. The quality control measurements act only at the batch level. Quantitative or qualitative data derived for many effects and interferences associated with an individual diagnostic sample can compromise any analyte...
September 13, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28898054/synthesis-radiolabeling-and-characterization-of-plasma-protein-binding-ligands-potential-tools-for-modulation-of-the-pharmacokinetic-properties-of-radio-pharmaceuticals
#6
Cristina Müller, Renáta Farkas, Francesca Borgna, Raffaella M Schmid, Martina Benešová, Roger Schibli
The development of (radio)pharmaceuticals with favorable pharmacokinetic profiles is crucial for allowing the optimization of the imaging or therapeutic potential and the minimization of undesired side effects. The aim of this study was, therefore, to evaluate and compare three different plasma protein binders (PPB-01, PPB-02, and PPB-03) that are potentially useful in combination with (radio)pharmaceuticals to enhance their half-life in the blood. The entities were functionalized with a 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA) chelator via a l-lysine and β-alanine linker moiety using solid-phase peptide chemistry and labeled with (177)Lu (T1/2 = 6...
September 12, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28891412/a-novel-prothrombin-time-method-to-measure-all-non-vitamin-k-dependent-oral-anticoagulants-noacs
#7
Tomas L Lindahl, Kerstin Arbring, Maria Wallstedt, Mats Rånby
BACKGROUND: There is a clinical need for point-of-care (POC) methods for non-vitamin K-dependent oral anticoagulants (NOACs). We modified a routine POC procedure: Zafena's Simple Simon™ PT-INR, a room-temperature, wet-chemistry prothrombin time method of the Owren-type. METHODS: To either increase or decrease NOAC interference, two assay variants were devised by replacing the standard 10 µL end-to-end capillary used to add the citrated plasma sample to 200 µL of prothrombin time (PT) reagent by either a 20 µL or a 5 µL capillary...
September 11, 2017: Upsala Journal of Medical Sciences
https://www.readbyqxmd.com/read/28871252/development-and-characterization-of-a-camelid-single-domain-antibody-urease-conjugate-that-targets-vascular-endothelial-growth-factor-receptor-2
#8
Baomin Tian, Wah Yau Wong, Marni D Uger, Pawel Wisniewski, Heman Chao
Angiogenesis is the process of new blood vessel formation and is essential for a tumor to grow beyond a certain size. Tumors secrete the pro-angiogenic factor vascular endothelial growth factor, which acts upon local endothelial cells by binding to vascular endothelial growth factor receptors (VEGFRs). In this study, we describe the development and characterization of V21-DOS47, an immunoconjugate that targets VEGFR2. V21-DOS47 is composed of a camelid single domain anti-VEGFR2 antibody (V21) and the enzyme urease...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28866970/calprotectin-as-an-early-biomarker-of-bacterial-infections-in-critically-ill-patients-an-exploratory-cohort-assessment
#9
Niklas Jonsson, Tom Nilsen, Patrik Gille-Johnson, Max Bell, Claes-Roland Martling, Anders Larsson, Johan Mårtensson
BACKGROUND: Calprotectin is the most abundant protein in the cytosolic fraction of neutrophils, and neutrophil degranulation is a major response to bacterial infections. OBJECTIVES: To assess the value of plasma calprotectin as an early marker of bacterial infections in critically ill patients and compare it with the corresponding values for procalcitonin (PCT), C-reactive protein (CRP) and white blood cell count (WBC). METHODS: We measured daily plasma calprotectin levels in 110 intensive care unit patients using a newly developed turbidimetric assay run on clinical chemistry analysers...
September 2017: Critical Care and Resuscitation: Journal of the Australasian Academy of Critical Care Medicine
https://www.readbyqxmd.com/read/28856233/performance-evaluation-of-enzyme-immunoassay-for-voriconazole-therapeutic-drug-monitoring-with-automated-clinical-chemistry-analyzers
#10
Yongbum Jeon, Minje Han, Eun Young Han, Kyunghoon Lee, Junghan Song, Sang Hoon Song
OBJECTIVE: Voriconazole is a triazole antifungal developed for the treatment of fungal infectious disease, and the clinical utility of its therapeutic drug monitoring has been evaluated. Recently, a new assay for analyzing the serum voriconazole concentration with an automated clinical chemistry analyzer was developed. We evaluated the performance of the new assay based on standardized protocols. METHODS: The analytical performance of the assay was evaluated according to its precision, trueness by recovery, limit of quantitation, linearity, and correlation with results from liquid chromatography-tandem mass spectrometry (LC-MS/MS)...
August 2017: Pract Lab Med
https://www.readbyqxmd.com/read/28856232/operational-impact-of-using-a-vanadate-oxidase-method-for-direct-bilirubin-measurements-at-an-academic-medical-center-clinical-laboratory
#11
Neha Dhungana, Cory Morris, Matthew D Krasowski
OBJECTIVES: The aim of this study was to compare the operational impact of using vanadate oxidase versus diazo direct bilirubin assays for an academic medical center patient population. DESIGN AND METHODS: Retrospective study was done over an approximately 3.5 year period. The main automated chemistry instrumentation was a Roche Diagnostics cobas 8000 line. The Roche Direct Bilirubin assay was compared to Diazyme Laboratories Direct Bilirubin Assay and Randox Laboratories Direct Bilirubin assay using manufacturer's guidelines for hemolysis index, lipemia index, and analytical measurement range (AMR)...
August 2017: Pract Lab Med
https://www.readbyqxmd.com/read/28838985/targeting-palmitoyl-acyltransferase-zdhhc21-improves-gut-epithelial-barrier-dysfunction-resulting-from-burn-induced-systemic-inflammation
#12
Ricci J Haines, Chunyan Wang, Clement Gy Yang, Rebecca A Eitnier, Fang Wang, Mack H Wu
Clinical studies in burn patients demonstrate a close association between leaky guts and increased incidence or severity of sepsis and other complications. Severe thermal injury triggers intestinal inflammation that contributes to intestinal epithelial hyperpermeability, which exacerbates systemic response leading to multiple organ failure and sepsis. In this study, we identified a significant function of a particular palmitoyl acyltransferase (PAT), ZDHHC21, in mediating signaling events required for gut hyperpermeability induced by inflammation...
August 24, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28805042/fabrication-and-characterization-of-electrospun-laminin-functionalized-silk-fibroin-poly-ethylene-oxide-nanofibrous-scaffolds-for-peripheral-nerve-regeneration
#13
Mina Rajabi, Masoumeh Firouzi, Zahra Hassannejad, Ismaeil Haririan, Payam Zahedi
The peripheral nerve regeneration is still one of the major clinical problems, which has received a great deal of attention. In this study, the electrospun silk fibroin (SF)/poly(ethylene oxide) (PEO) nanofibrous scaffolds were fabricated and functionalized their surfaces with laminin (LN) without chemical linkers for potential use in the peripheral nerve tissue engineering. The morphology, surface chemistry, thermal behavior and wettability of the scaffolds were examined to evaluate their performance by means of scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, differential scanning calorimetry (DSC) and water contact angle (WCA) measurements, respectively...
August 14, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28792374/evaluation-of-an-automated-quantitative-latex-immunoturbidimetric-non-treponemal-assay-for-diagnosis-and-follow-up-of-syphilis-a-prospective-cohort-study
#14
Kara Osbak, Said Abdellati, Achilleas Tsoumanis, Marjan Van Esbroeck, Luc Kestens, Tania Crucitti, Chris Kenyon
PURPOSE: We evaluated the Sekure rapid plasma reagin (RPR-S) (Sekisui Diagnostics) automated quantitative latex immunoturbidimetric assay performed on the SK500 clinical chemistry system for clinical appropriateness. METHODOLOGY: Syphilis-infected individuals and controls were recruited into a prospective cohort study conducted at a sexually transmitted infection clinic in Antwerp, Belgium. Sera collected at diagnosis (baseline) and at 3, 6, 9 and 12 months post-treatment were tested with RPR-S and Macro-Vue RPR card (RPR-C) (Becton Dickinson) assays; RPR-C was considered the reference test...
August 10, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28783216/sensitive-quantitative-naked-eye-biodetection-with-polyhedral-cu-nanoshells
#15
Jae-Ho Kim, Jeong-Eun Park, Mouhong Lin, Sungi Kim, Gyeong-Hwan Kim, SungJun Park, GwangPyo Ko, Jwa-Min Nam
One of the most heavily used methods in chemical and biological labeling, detection, and imaging is based on silver shell-based enhancement on Au nanoparticles (AuNPs) that is useful for amplifying Rayleigh scattering, colorimetric signal, surface-enhanced Raman scattering, and electrical signal, but poor structural controllability and nonspecific growth of silver shells have limited its applications, especially with respect to signal reproducibility and quantification. Here, a highly specific, well-defined Cu nanopolyhedral shell overgrowth chemistry is developed with the aid of polyethyleneimine (PEI) on AuNPs, and the use of this PEI-mediated Cu polyhedral nanoshell (CuP) chemistry is shown as a means of light-scattering signal enhancement for the development of naked-eye-based highly sensitive and quantitative detections of DNA and viruses...
August 7, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28757461/safety-assessment-of-urolithin-a-a-metabolite-produced-by-the-human-gut-microbiota-upon-dietary-intake-of-plant-derived-ellagitannins-and-ellagic-acid
#16
Jacqueline Heilman, Pénélope Andreux, Nga Tran, Chris Rinsch, William Blanco-Bose
Urolithins are metabolites produced in the gut following consumption of ellagitannins and ellagic acid rich foods such as pomegranates, nuts and certain berries. Urolithin A (UA) is one of the predominant isoforms of urolithins in humans and has demonstrated compelling biological activities, suggesting potential benefits of direct consumption of UA. However, an evaluation of the safety of direct administration of UA has not yet been published. The aim of this study was to investigate for the first time the genotoxicity, toxicokinetics, and repeated dose safety of orally administered synthetic UA in rats...
October 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28740328/assessment-of-equivalence-of-adipose-tissue-treatment-with-a-noncontact-field-rf-system-delivering-200-w-for-30-min-and-300-w-for-20-min-an-in-vivo-porcine-study
#17
Tae-Rin Kwon, Jong Hwan Kim, Seok Joon, Seok Kyun Mun, Chan Woong Kim, Beom Joon Kim
BACKGROUND AND AIMS: Abdominal circumferential reduction with noncontact high frequency apoptosis-inducing field RF (AiRF) is becoming very popular. The present study compared the treatment results from two different sets of parameters giving the same dose from the same system in an in vivo porcine model. MATERIALS AND METHODS: Two 10 cm × 10 cm areas were symmetrically marked on both sides of the midline (total of 4 areas) over the rectus abdominis muscle of two anesthetized female micropigs...
March 31, 2017: Laser Therapy
https://www.readbyqxmd.com/read/28738677/quantitation-of-87-proteins-by-nlc-mrm-ms-in-human-plasma-workflow-for-large-scale-analysis-of-biobank-samples
#18
Melinda Rezeli, Karin Sjödin, Henrik Lindberg, Olof Gidlöf, Bertil Lindahl, Tomas Jernberg, Jonas Spaak, David Erlinge, György Marko-Varga
A multiple reaction monitoring (MRM) assay was developed for precise quantitation of 87 plasma proteins including the three isoforms of apolipoprotein E (APOE) associated with cardiovascular diseases using nanoscale liquid chromatography separation and stable isotope dilution strategy. The analytical performance of the assay was evaluated and we found an average technical variation of 4.7% in 4-5 orders of magnitude dynamic range (≈0.2 mg/L to 4.5 g/L) from whole plasma digest. Here, we report a complete workflow, including sample processing adapted to 96-well plate format and normalization strategy for large-scale studies...
August 8, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28735491/nanofluidic-allele-specific-digital-pcr-method-for-quantifying-idh1-and-idh2-mutation-burden-in-acute-myeloid-leukemia
#19
Daniel H Wiseman, Tim C P Somervaille
Precise quantitation of allelic burden for a pathogenic mutation has diverse clinical and research applications but can be difficult to achieve with conventional qPCR-based techniques, especially at lower mutant allele frequencies. Digital PCR overcomes many of the limitations of qPCR and can be highly quantitative even for single-nucleotide variants, with distinct advantages over next-generation sequencing approaches. Here we describe a method combining the principles of TaqMan(®)-chemistry SNP genotyping with microfluidic digital PCR to generate a highly sensitive, quantitative allele-specific digital PCR assay for the six most common IDH1 and IDH2 mutations encountered in myeloid malignancy...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28734989/hydroxyvitamin-d-assays-an-historical-perspective-from-deqas
#20
G D Carter, J Berry, R Durazo-Arvizu, E Gunter, G Jones, J Jones, H L J Makin, P Pattni, C T Sempos, P Twomey, E L Williams, S A Wise
Recent years have seen a substantial increase in demand for 25-hydroxyvitamin D (25-OHD) assays. DEQAS (the Vitamin D External Quality Assessment Scheme) has been monitoring the performance of these assays since 1989. The first DEQAS distribution was in June 1989 and results were submitted by 13 laboratories in the UK, two of which used HPLC/UV; the rest used ligand binding assays with a tritium tracer. Inter-laboratory CVs (ALTM) ranged from 29.3% (42.7 nmol/L) to 53.7% (20.0 nmol/L). Currently the scheme has participants in 56 countries using 30 methods or variants of methods...
July 19, 2017: Journal of Steroid Biochemistry and Molecular Biology
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