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https://www.readbyqxmd.com/read/29304133/development-and-testing-of-species-specific-elisa-assays-to-measure-ifn-%C3%AE-and-tnf-%C3%AE-in-bottlenose-dolphins-tursiops-truncatus
#1
Kirsten C Eberle, Stephanie K Venn-Watson, Eric D Jensen, Joanna LaBresh, Yvonne Sullivan, Laura Kakach, Randy E Sacco
Monitoring the immune status of cetaceans is important for a variety of health conditions. Assays to quantify cytokines, especially pro-inflammatory cytokines, could be employed, in addition to currently available diagnostic assays, to screen for alterations in the health status of an animal. Though a number of immunological assays are readily available for humans and mice, specific assays for many veterinary species, including cetaceans such as bottlenose dolphins (Tursiops truncatus), are more limited. Herein, we describe the development of IFN-gamma (IFN-γ) and TNF-alpha (TNF-α) enzyme-linked immunosorbent assays (ELISAs) specific to bottlenose dolphins...
2018: PloS One
https://www.readbyqxmd.com/read/29298486/redox-controlled-fluorescent-nanoswitch-based-on-reversible-disulfide-and-its-application-in-butyrylcholinesterase-activity-assay
#2
Guilin Chen, Hui Feng, Xiaogan Jiang, Jing Xu, Saifei Pan, Zhaosheng Qian
Butyrylcholinesterase (BChE) mainly contributing to plasma cholinesterase activity is an important indicator for routinely diagnosing liver function and organophosphorus poisoning in clinical diagnosis, but its current assays are scarce and frequently suffer from some significant interference and instability. Herein, we report a redox-controlled fluorescence nanoswtich based on reversible disulfide bonds, and further develop a fluorometric assay of BChE via thiol-triggered disaggregation-induced emission. Thiol-functionalized carbon quantum dots (thiol-CQDs) with intense fluorescence is found to be responsive to hydrogen peroxide, and their redox reaction transforms thiol-CQDs to nonfluorescent thiol-CQDs assembly...
January 4, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29286412/basic-research-in-plasma-medicine-a-throughput-approach-from-liquids-to-cells
#3
Sander Bekeschus, Anke Schmidt, Felix Niessner, Torsten Gerling, Klaus-Dieter Weltmann, Kristian Wende
In plasma medicine, ionized gases with temperatures close to that of vertebrate systems are applied to cells and tissues. Cold plasmas generate reactive species known to redox regulate biological processes in health and disease. Pre-clinical and clinical evidence points to beneficial effects of plasma treatment in the healing of chronic ulcer of the skin. Other emerging topics, such as plasma cancer treatment, are receiving increasing attention. Plasma medical research requires interdisciplinary expertise in physics, chemistry, and biomedicine...
November 17, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29284215/clinical-assessment-after-human-adipose-stem-cell-transplantation-in-dogs
#4
Seok Hee Lee, Erif Maha Nugraha Setyawan, Yoo Bin Choi, Jeong Chan Ra, Sung Keun Kang, Geon A Kim, Byeong Chun Lee
Adipose stem cells (ASCs) are an attractive source of stem cells with therapeutic applicability in various fields for regenerating damaged tissues because they show stemness characteristics. However, little investigation has been done to evaluate adverse responses caused by human ASCs therapy. Therefore, in the present study, a clinical assessment after human ASCs transplantation in dogs was investigated. A total of 12 healthy male dogs were selected and divided into 4 groups: 1) saline infusion and bolus groups, and 2) ASCs infusion and bolus groups...
December 28, 2017: Journal of Veterinary Science
https://www.readbyqxmd.com/read/29261759/implementation-of-biological-variation-based-analytical-performance-specifications-in-the-laboratory-stringent-evaluation-of-improvacutor-blood-collection-tubes
#5
Hee-Jung Chung, Yoon Kyung Song, Sung Kuk Hong, Sang-Hyun Hwang, Hee Seung Seo, Dong Hee Whang, Myung-Hyun Nam, Do Hoon Lee
Recently, because the quality of laboratory analyses has increased along with the need for quality improvement, several external quality control bodies have adapted performance specifications using the Desirable Biological Variation Database, termed "Ricos goals"; these criteria are more stringent than those presented in CLIA 88. In this study, we aimed to validate newly introduced serum separator tubes, Improvacutor, for routine clinical chemistry testing in accordance with Ricos goals and CLIA 88. Blood samples were collected from 100 volunteers into three types of serum vacuum tubes: Greiner Vacuette, Becton Dickinson (BD) Vacutainer, and Improve Improvacutor...
2017: PloS One
https://www.readbyqxmd.com/read/29240228/chromatographic-methods-in-hiv-medicine-application-to-therapeutic-drug-monitoring
#6
REVIEW
Timothy L Archibald, Derek E Murrell, Stacy D Brown
HIV antiretroviral therapy spans several different drug classes, meant to combat various aspects of viral infection and replication. Many authors have argued the benefits of therapeutic drug monitoring (TDM) for the HIV-patient including compliance assurance and assessment of appropriate drug concentrations; however, the array of drug chemistries and combinations makes TDM an arduous task. HPLC-UV and LC-MS/MS are both frequent instruments for the quantification of HIV drugs in biological matrices with investigators striving to balance sensitivity and affordability...
December 14, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/29233262/medicinal-chemistry-strategies-for-pet-tracer-discovery
#7
REVIEW
José Ignacio Andrés, Mark Schmidt
The detection of gamma rays, resulting from decay of positron emitting isotopes, allows exquisitely sensitive detection of probes radiolabeled with such isotopes. These probes can be designed for high affinity binding to specific molecular targets and be used as tools in the early development of drugs, particularly for neuropsychiatric disorders. Availability of novel tracers requires dedicated resources and selection assays. Many of the selection assays are similar to those used for discovery of clinical compounds, although the distribution and clearance of target specific radioligands requires different in vitro and in vivo methods and new derivatives...
November 2017: Drug Discovery Today. Technologies
https://www.readbyqxmd.com/read/29205767/atomic-mass-tag-of-bismuth-209-for-increasing-the-immunoassay-multiplexing-capacity-of-mass-cytometry
#8
Guojun Han, Shih-Yu Chen, Veronica D Gonzalez, Eli R Zunder, Wendy J Fantl, Garry P Nolan
Mass cytometry (or CyTOF) is an atomic mass spectrometry-based single-cell immunoassay technology, which has provided an increasingly systematic and sophisticated view in basic biological and clinical studies. Using elemental reporters composed of stable heavy metal isotopes, more than 50 cellular parameters are measured simultaneously. However, this current multiplexing does not meet the theoretical capability of CyTOF instrumentation with 135 detectable channels, primarily due to the limitation of available chemistries for conjugating elemental mass tags to affinity reagents...
December 4, 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/29205045/colon-ascendens-stent-peritonitis-casp-induces-excessive-inflammation-and-systemic-metabolic-dysfunction-in-a-septic-rat-model
#9
Limin Zhang, Yuan Tian, Jianfen Yang, Jieshou Li, Huiru Tang, Yulan Wang
The colon ascendens stent peritonitis (CASP) surgery creates a leakage of intestinal contents, resulting in polymicrobial sepsis associated with a high risk for postoperative multiple organ failure and death in surgical patients. To evaluate the effects of CASP on multiple organs, we analyzed the systemic metabolic consequences in liver, kidney, lung and heart of rats after CASP by employing a combination of metabolomics, clinical chemistry and biological assays. We found that CASP surgery after 18 h caused significant elevations of lipid, amino acids, acetate, choline, PC and GPC in rat liver together with significant depletion of glucose and glycogen...
December 5, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/29200660/measuring-ultra-low-levels-of-nucleotide-biomarkers-using-quartz-crystal-microbalance-and-spr-microarray-imaging-methods-a-comparative-analysis
#10
Gayan Premaratne, Zainab H Al Mubarak, Lakmini Senavirathna, Lin Liu, Sadagopan Krishnan
Circulating serum nucleotide biomarkers are useful indicators for early diagnosis of cancer, respiratory illnesses, and other deadly diseases. In this work, we compared detection performances of a quartz crystal microbalance (QCM), which is a mass sensor, with that of a surface plasmon resonance (SPR) microarray for an oligonucleotide mimic of a microRNA-21 biomarker. A surface immobilized capture oligonucleotide probe was used to hybridize with the target oligonucleotide (i.e., the microRNA-21 mimic) to facilitate selective detection...
December 2017: Sensors and Actuators. B, Chemical
https://www.readbyqxmd.com/read/29180918/analytical-evaluation-of-a-fully-automated-immunoassay-for-faecal-calprotectin-in-a-paediatric-setting
#11
Britta Noebauer, Lejla Ramic, Andrea Konstantin, Christina Zachbauer, Elisa Einwallner
Introduction: Faecal calprotectin (FC) is a routinely used marker for identifying and monitoring children with inflammatory bowel disease (IBD). This non-invasive test is useful for screening children with gastrointestinal symptoms to avoid unnecessary invasive procedures. In this study, we validated for the first time the performance of a fully automated particle-enhanced turbidimetric immunoassay (PETIA) on the VITROS® 5600 analyzer for measurement of FC in symptomatic children and adolescents...
October 15, 2017: Biochemia Medica: časopis Hrvatskoga Društva Medicinskih Biokemičara
https://www.readbyqxmd.com/read/29169731/a-composition-of-medicinal-plants-with-an-enhanced-ability-to-suppress-microsomal-lipid-peroxidation-and-a-protective-activity-against-carbon-tetrachloride-induced-hepatotoxicity
#12
Araylim N Aralbaeva, Aigul T Mamataeva, Nazgul I Zhaparkulova, Raisa S Utegalieva, Marina Khanin, Michael Danilenko, Maira K Murzakhmetova
Treatment of liver injury induced by various toxicants represents a serious clinical challenge. Here, we utilized the ability of natural agents to inhibit microsomal lipid peroxidation (LPO) as the in-vitro screening paradigm for selecting efficacious tissue-protective combinations of cooperatively acting medicinal plants. Based on screening of 70 water-ethanol extracts obtained from different parts of 65 plants we prepared a highly active phytocomposition (PC-1) containing oregano (Origanum vulgare), wild thyme (Thymus serpyllum) and coltsfoot (Tussilago farfara) aerial parts, valerian (Valeriana officinalis) leaves and little-leaf linden (Tilia cordata) flowers...
November 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29133077/-chronic-kidney-failure-and-biotin-a-combination-inducing-unusual-results-in-thyroid-and-parathyroid-investigations-report-of-2-cases
#13
Miora Koloina Ranaivosoa, Sébastien Ganel, Arnaud Agin, Sarah Romain, Xavier Parent, Nathalie Reix
In clinical chemistry, many immunoassays apply biotin and streptavidin in the assay principle. Presence of high levels of biotin in patient samples can produce negative or positive interference depending on the assay format. In this study, we describe 2 clinical cases with chronic kidney failure and with unusual thyroid and parathyroid function test results due to biotin interference. We studied the impact of biotin levels on thyroid stimulating hormone (TSH), free thyroxine (T4L) and parathormone (PTH) results with a pool of sera loaded with several concentrations of biotin...
November 10, 2017: Néphrologie & Thérapeutique
https://www.readbyqxmd.com/read/29108484/the-validation-of-quantitative-mass-spectrometry-assays-for-clinical-chemistry-assessments-in-animal-models
#14
Jennifer L Colangelo
Mass spectrometry (MS) has become a key platform in the clinical pathology laboratory and is being used more frequently for clinical pathology assessments in preclinical species for drug development studies. MS assays are being utilized for some traditional clinical pathology end points as well as novel biomarker analyses. For effective deployment in drug development toxicology studies, assays must be validated for use, and these validations are not very different from other bioanalytical platforms commonly found in the clinical pathology laboratory...
January 1, 2017: Toxicologic Pathology
https://www.readbyqxmd.com/read/29090536/-consideration-about-chemistry-manufacture-and-control-cmc-key-problems-in-simplified-registration-of-classical-traditional-chinese-medicine-excellent-prescriptions
#15
Zhi-Min Wang, Ju-Yan Liu, Xiao-Qian Liu, De-Qin Wang, Li-Hua Yan, Jin-Jin Zhu, Hui-Min Gao, Chun Li, Jin-Yu Wang, Chu-Yuan Li, Qing-Chun Ni, Ji-Sheng Huang, Juan Lin
As an outstanding representative of traditional Chinese medicine(TCM) prescriptions accumulated from famous TCM doctors' clinical experiences in past dynasties, classical TCM excellent prescriptions (cTCMeP) are the most valuable part of TCM system. To support the research and development of cTCMeP, a series of regulations and measures were issued to encourage its simplified registration. There is still a long-way to go because many key problems and puzzles about technology, registration and administration in cTCMeP R&D process are not resolved...
May 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29064366/spot-protein-creatinine-ratio-and-spot-albumin-creatinine-ratio-in-the-assessment-of-pre-eclampsia-a-diagnostic-accuracy-study-with-decision-analytic-model-based-economic-evaluation-and-acceptability-analysis
#16
Jason Waugh, Richard Hooper, Edmund Lamb, Stephen Robson, Andrew Shennan, Fiona Milne, Christopher Price, Shakila Thangaratinam, Vladislav Berdunov, Jenn Bingham
BACKGROUND: The National Institute for Health and Care Excellence (NICE) guidelines highlighted the need for 'large, high-quality prospective studies comparing the various methods of measuring proteinuria in women with new-onset hypertensive disorders during pregnancy'. OBJECTIVES: The primary objective was to evaluate quantitative assessments of spot protein-creatinine ratio (SPCR) and spot albumin-creatinine ratio (SACR) in predicting severe pre-eclampsia (PE) compared with 24-hour urine protein measurement...
October 2017: Health Technology Assessment: HTA
https://www.readbyqxmd.com/read/29062027/harnessing-a-catalytic-lysine-residue-for-the-one-step-preparation-of-homogeneous-antibody-drug-conjugates
#17
Alex R Nanna, Xiuling Li, Even Walseng, Lee Pedzisa, Rebecca S Goydel, David Hymel, Terrence R Burke, William R Roush, Christoph Rader
Current strategies to produce homogeneous antibody-drug conjugates (ADCs) rely on mutations or inefficient conjugation chemistries. Here we present a strategy to produce site-specific ADCs using a highly reactive natural buried lysine embedded in a dual variable domain (DVD) format. This approach is mutation free and drug conjugation proceeds rapidly at neutral pH in a single step without removing any charges. The conjugation chemistry is highly robust, enabling the use of crude DVD for ADC preparation. In addition, this strategy affords the ability to precisely monitor the efficiency of drug conjugation with a catalytic assay...
October 24, 2017: Nature Communications
https://www.readbyqxmd.com/read/29038839/hepatotoxic-combination-effects-of-three-azole-fungicides-in-a-broad-dose-range
#18
T Heise, F Schmidt, C Knebel, S Rieke, W Haider, I Geburek, L Niemann, P Marx-Stoelting
Single active substances of pesticides are thoroughly examined for their toxicity before approval. In this context, the liver is frequently found to be the main target organ. Since consumers are generally exposed to multiple residues of different active substances via the diet, it is important to analyse combinations of active substances for potential mixture effects. For the (tri-)azoles, a group of agricultural fungicides and antifungal drugs, combination effects on the liver are likely because of a similar mode of action...
October 16, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/29034303/validation-of-capillary-blood-analysis-and-capillary-testing-mode-on-the-epoc-point-of-care-system
#19
Jing Cao, Rachel Edwards, Janette Chairez, Sridevi Devaraj
BACKGROUND: Laboratory test in transport is a critical component of patient care, and capillary blood is a preferred sample type particularly in children. This study evaluated the performance of capillary blood testing on the epoc Point of Care Blood Analysis System (Alere Inc). METHODS: Ten fresh venous blood samples was tested on the epoc system under the capillary mode. Correlation with GEM 4000 (Instrumentation Laboratory) was examined for Na+, K+, Cl-, Ca2+, glucose, lactate, hematocrit, hemoglobin, pO2, pCO2, and pH, and correlation with serum tested on Vitros 5600 (Ortho Clinical Diagnostics) was examined for creatinine...
December 2017: Practical Laboratory Medicine
https://www.readbyqxmd.com/read/29029351/development-and-application-of-a-dual-rat-and-human-ahr-activation-assay
#20
Martin R Brown, Helen Garside, Emma Thompson, Saseela Atwal, Chloe Bean, Tony Goodall, Michael Sullivan, Mark J Graham
Significant prolonged AHR activation, classically exhibited following exposure to TCDD (dioxin), can cause a variety of undesirable toxicological effects. Novel pharmaceutical chemistries also have the potential to cause activation of AHR and consequent toxicities in pre-clinical species and man. Previous methods either employed relatively expensive and low throughput primary hepatocyte dosing with PCR endpoint, or low resolution overexpressing reporter gene assays. We have developed, validated and applied an in vitro microtitre plate imaging-based medium throughput screening assay for the assessment of endogenous species-specific AHR activation potential via detection of induction of the surrogate transcriptional target Cytochrome P450 CYP1A1...
September 18, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
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