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Chin Wai Hui, Marie-Kim St-Pierre, Jérôme Detuncq, Lucie Aumailley, Marie-Julie Dubois, Vanessa Couture, Daniel Skuk, André Marette, Jacques P Tremblay, Michel Lebel, Marie-Ève Tremblay
Werner syndrome (WS) is a premature aging disorder caused by mutations in a RecQ-family DNA helicase, WRN. Mice lacking part of the helicase domain of the WRN orthologue exhibit many phenotypic features of WS, including metabolic abnormalities and a shorter lifespan. Yet, little is known about the impact of WRN mutations on the central nervous system in both humans and mouse models of WS. In the current study, we have performed a longitudinal behavioral assessment on mice bearing a Wrn helicase deletion. Behavioral tests demonstrated a loss of motor activity and coordination, reduction in perception, increase in repetitive behavior, and deficits in both spatial and social novelty memories in Wrn mutant mice compared to age-matched wild type mice...
June 14, 2018: Brain, Behavior, and Immunity
Torunn Hjøllo, Eirik Bratland, Hans Steinsland, Matej Radunovic, Nina Langeland, Kurt Hanevik
INTRODUCTION/AIMS: The long-term humoral immune response after a natural giardiasis infection is not well understood. The aim of this study was to evaluate longitudinal serum IgA and IgG/M responses towards conserved regions of two Giardia variant-specific surface proteins (VSP) and whether these responses differ between Giardia assemblages and durations of infection. METHODS: We recruited thirty Giardia-positive patients, mainly returning travellers, and eighteen healthy adults presumed to be Giardia unexposed...
June 14, 2018: Experimental Parasitology
Somayeh Mohammadi, Abdollah Salimi, Somayeh Hamde Qaddareh
We proposed an amplified FRET immunosensing for detection of CA15-3 tumor marker by highly biospecific interactions between CA 15-3 antigen and the corresponding antibody and aptamer. In this sandwich type immunoassay, CA15-3 antibody-functionalized carbon dots and AuNPs labeled PAMAM-Dendrimer/aptamer were used as donor/acceptor, respectively. When CA 15-3 Ag was added to homogenous immunoassay, the strong complex interaction between CA15-3 Ab-CA15-3 Ag- aptamer caused in more coming closer carbon dot and AuNPs and more decreasing fluorescence signal...
June 13, 2018: Analytical Biochemistry
Anne Troldborg, Steffen Thiel, Marten Trendelenburg, Justa Friebus-Kardash, Josephine Nehring, Rudi Steffensen, Søren Werner Karlskov Hansen, Magdalena Janina Laska, Bent Deleuran, Jens Christian Jensenius, Anne Voss, Kristian Stengaard-Pedersen
OBJECTIVE: The pathogenesis of systemic lupus erythematosus (SLE) involves complement activation. Activation of complement through the classical pathway (CP) is well established. However, complement activation through pattern recognition not only happens through the CP, but also through the lectin pathway (LP). We investigated the hypothesis that the LP is activated in SLE and involved in the pathogenesis of the disease. METHODS: Using immunoassays developed in-house, we measured concentrations of LP proteins in a cohort of 372 patients with SLE and 170 controls...
June 15, 2018: Journal of Rheumatology
Amit Kumar Jaiswal, Daya Shanker, Vikrant Sudan, Amit Singh
In the present study, the 75% alcoholic fractionation of excretory-secretory (ES) antigen isolated from 200 to 300 live P. epiclitum was assessed for its diagnostic potential for the detection of caprine amphistomosis by using antibody detection enzyme immunoassay. Prior to enzyme immunoassay, 75% alcoholic fractionation of excretory-secretory (ES) antigen was subjected to SDS- PAGE and western blot analysis for the presence of immunoreactive polypeptides. SDS-PAGE analysis of ES antigen resolved a total 7 polypeptides bands of size 56, 27, 25, 22...
June 15, 2018: Veterinary Parasitology
Alexis C Crawford, Colin C Young, Marc D Porter
This paper examines how the difference in the spatial orientation of the capture substrate influences the analytical sensitivity and limits of detection for immunoassays that use gold nanoparticle labels (AuNPs) and rely on diffusion in quiet solution in the antigen capture and labeling steps. Ideally, the accumulation of both reactants should follow a dependence governed by the rate in which diffusion delivers reactants to the capture surface. In other words, the accumulation of reactants should increase with the square root of the incubation time, i...
June 15, 2018: Analytical Chemistry
Łukasz Lis, Patryk Jerzak, Andrzej Konieczny, Michał Sroka, Barbara Noceń-Rychlewska, Paweł Podgórski, Wojciech Witkiewicz, Zbigniew Hruby
BACKGROUND: Clostridium difficile (C. difficile) is a Gram-positive bacillus responsible for diarrhea and colitis, mainly among hospitalized patients. It is a leading cause of nosocomial infections. OBJECTIVES: The main goal of the study was to assess the risk factors of the C. difficile infection in patients with chronic kidney disease (CKD). MATERIAL AND METHODS: We evaluated the medical records of all patients treated at the Department of Nephrology and Renal Transplantation of the Research and Development Center in the Provincial Specialist Hospital in Wrocław, Poland, between February 2009 and May 2012, who developed diarrhea, abdominal pain and/or fever within 72 h after admission...
June 15, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
Valerie D Zaffran, Shridhar K Sathe
Almond seeds were subjected to select thermal processing and amandin was purified from processed and unprocessed (control) seeds using cryoprecipitation. Amandin immunoreactivity was assessed using two murine monoclonal antibodies (mAbs)-4C10 and 4F10 detecting human IgE-relevant conformational and linear epitopes, respectively. Overall amandin immunoreactivity following thermal treatment ranged from 64.9% to 277.8% (4C10) and 81.3% to 270.3% (4F10). Except for autoclaving (121 °C, 15 psi, 30 min) and roasting (160 °C, 30 min), the tested processing conditions resulted in increased immunoreactivity as determined by mAbs 4C10 and 4F10-based enzyme-linked immunosorbent assays (ELISAs)...
June 15, 2018: Journal of Food Science
Hanne A Eide, Ingerid Skjei Knudtsen, Vandana Sandhu, Ayca M Løndalen, Ann Rita Halvorsen, Azadeh Abravan, Elin H Kure, Trond V Bogsrud, Odd Terje Brustugun, Jon Amund Kyte, Eirik Malinen, Åslaug Helland
Purpose: Radiation therapy effectively kills cancer cells and elicits local effects in the irradiated tissue. The aim of this study was to investigate the kinetics of cytokines in the serum of patients with lung cancer undergoing radiation therapy and to identify associations with metabolic tumor burden as determined by 2-deoxy-2-fluoro-D-glucose (18 F-FDG) positron emission tomography (PET). Methods and materials: Forty-five patients with advanced non-small cell lung cancer were included in a phase 2 clinical trial and randomized between fractionated thoracic radiation therapy alone or concurrent with an epidermal growth factor receptor inhibitor...
April 2018: Advances in Radiation Oncology
Edward W Randell, Garry Short, Natasha Lee, Allison Beresford, Margaret Spencer, Marina Kennell, Zoë Moores, David Parry
Six Sigma involves a structured process improvement strategy that places processes on a pathway to continued improvement. The data presented here summarizes a project that took three clinical laboratories from autoverification processes that allowed between about 40% to 60% of tests being auto-verified to more than 90% of tests and samples auto-verified. The project schedule, metrics and targets, a description of the previous system and detailed information on the changes made to achieve greater than 90% auto-verification is presented for this Six Sigma DMAIC (Design, Measure, Analyze, Improve, Control) process improvement project...
June 2018: Data in Brief
Mohammad J Alkhatatbeh, Khalid K Abdul-Razzak, Lubna Q Khasawneh, Nesreen A Saadeh
The aim of the present study was to investigate the prevalence of musculoskeletal pain in patients with type 2 diabetes mellitus (T2DM) in association with 25-hydroxyvitamin D levels, anxiety, depression and neuropathy. A cross-sectional study was conducted involving a total of 124 T2DM patients. Musculoskeletal pain was determined by self-reporting of painful body sites. Pain intensity was assessed using a scale of 0-10. Anxiety and depression were assessed using the Hospital Anxiety and Depression Scale. Neuropathy was assessed using the PainDETECT questionnaire...
June 2018: Biomedical Reports
Haiwu Cao, Xiaohong Zhao, Shiyun Lu, Zhi Wang
The aim of the current study was to measure the expression of acetyl-N-Ser-Asp-Lys-Pro (ACSDKP) in patients with acute myeloid leukemia (AML) and the effect of prolyl oligopeptidase inhibitor (POPi) on the bone marrow stromal cells of these patients. Serum and bone marrow stromal cell samples were collected from 33 patients with AML admitted to Wuxi Second People's Hospital, Nanjing Medical University between September 2011 and August 2016. ACSDKP levels were measured using a highly specific competitive enzyme immunoassay (EIA)...
June 2018: Experimental and Therapeutic Medicine
Yifan Lang, Kaihong Li, Wei Meng, Renrong Liu
OBJECTIVE: To develop an indirect competitive chemiluminescent enzyme immunoassay( CLEIA) for the detection of bisphenol A in milk samples. METHODS: The CLEIA conditions including antigen coated concentration, concentration of methanol, concentration of enzyme labeled anti-antibody, p H and ionic strength were optimized to build competitive inhibition curve, determine the linear range and detection limit, and study the recovery of spiked milk samples. RESULTS: In the standard curve of the optimized CLEIA, the half maximal inhibitory concentration( IC_(50)) was 3...
March 2018: Wei Sheng Yan Jiu, Journal of Hygiene Research
Yizhan Yu, Tingting Yang, Pei Liu, Nianchao Wang, Yan Lu, Yahong Huang, Pingping Shen
OBJECTIVE: To prepare human cystatin C( CysC) recombinant protein and produce monoclonal antibodies with high affinity and specificity. Develop a competitive ELISA detection system to detect of CysC in human serum. METHODS: The CysC gene sequence was found on NCBI. The optimized gene fragments were synthesized and the recombinant CysC protein was expressed in Escherichia coli then used to immunize Balb/c mice. The positive hybridoma cell lines were obtained by hybridoma cell fusion techniques and ascites monoclonal antibody was prepared and purified...
July 2017: Wei Sheng Yan Jiu, Journal of Hygiene Research
Nicholas J Ashton, Michael Schöll, Kerstin Heurling, Eleni Gkanatsiou, Erik Portelius, Kina Höglund, Gunnar Brinkmalm, Abdul Hye, Kaj Blennow, Henrik Zetterberg
At the center of Alzheimer's disease pathogenesis is the aberrant aggregation of amyloid-β (Aβ) into oligomers, fibrils and plaques. Effective monitoring of Aβ deposition directly in patients is essential to assist anti-Aβ therapeutics in target engagement and participant selection. In the advent of approved anti-Aβ therapeutics, biomarkers will become of fundamental importance in initiating treatments having disease modifying effects at the earliest stage. Two well-established Aβ biomarkers are widely utilized: Aβ-binding ligands for positron emission tomography and immunoassays to measure Aβ42 in cerebrospinal fluid...
June 15, 2018: Biomarkers in Medicine
Andreea Campu, Frederic Lerouge, Denis Chateau, Frederic Chaput, Patrice Baldeck, Stephane Parola, Dana Maniu, Ana-Maria Craciun, Adriana Vulpoi, Simion Astilean, Monica Focsan
In this work, we demonstrate the feasibility of gold bipyramidal-shaped nanoparticles (AuBPs) to be used as active plasmonic nanoplatforms for the detection of the biotin-streptavidin interaction in aqueous solution via both Localized Surface Plasmon Resonance and Surface Enhanced Raman Scattering (LSPR/SERS). Our proof of concept exploits the precise attachment of the recognition element at the tips of AuBPs where the electromagnetic field is stronger, which is beneficial to the surface sensitivity of longitudinal LSPR on the local refractive index, and to the electromagnetic enhancement of SERS activity too...
June 15, 2018: Analytical Chemistry
Duane S Juang, Ching-Hui Lin, Yi-Ren Huo, Chia-Yu Tang, Chun-Ren Cheng, Hua-Shu Wu, Shih-Fen Huang, Alexander Kalnitsky, Chun-Cheng Lin
Here we report an electrochemical immunoassay platform called Proton-ELISA (H-ELISA) for the detection of bioanalytes. H-ELISA uniquely utilizes protons as an immunoassay detection medium, generated by the enzyme glucose oxidase (GOx) coupled with Fenton's reagent in a proton amplification reaction cascade that results in a highly amplified signal. A proton-sensitive dual-gated ion-sensitive field effect transistor (DG-ISFET) sensor was also developed for sensitive and accurate detection of the proton signal in H-ELISA...
June 7, 2018: Biosensors & Bioelectronics
Fatiha Mekircha, Samira Chebab, Rosita Gabbianelli, Essaid Leghouchi
This study aimed to verify whether Olea europaea L. (olive) oil (OEO) exerted a protective effect against oxidative stress induced by deltamethrin (DM) and alterations of pituitary, thyroid and gonadal hormones in adult female rats. DM (0,00256 g/kg body weight),OEO (0,6 g/kg body weight) and DM with OEO were administered to rats orally for 28 days. Volatile compounds present in olive oil were analysed by GC-MS. Estradiol (E2 ), Thyroxine (T4),Thyroid Stimulating Hormone (TSH), Triiodothyronine (T3), Follicle Stimulating Hormone (FSH), Luteinizing Hormone (LH), Progesterone (Pg) were measured in serum using Chemiluminescent Microparticle Immunoassay (CMIA)...
June 11, 2018: Ecotoxicology and Environmental Safety
Daniele Vergara, Monica Bianco, Rosanna Pagano, Paola Priore, Paola Lunetti, Flora Guerra, Simona Bettini, Sonia Carallo, Alessandra Zizzari, Elena Pitotti, Livia Giotta, Loredana Capobianco, Cecilia Bucci, Ludovico Valli, Michele Maffia, Valentina Arima, Antonio Gaballo
Protein biomarkers are important diagnostic tools for cancer and several other diseases. To be validated in a clinical context, a biomarker should satisfy some requirements including the ability to provide reliable information on a pathological state by measuring its expression levels. In parallel, the development of an approach capable of detecting biomarkers with high sensitivity and specificity would be ideally suited for clinical applications. Here, we performed an immune-based label free assay using Surface Plasmon Resonance (SPR)-based detection of the soluble form of E-cadherin, a cell-cell contact protein that is involved in the maintaining of tissue integrity...
June 11, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
Daniel Bergman, Anders Larsson, Helene Hansson-Hamlin, Anna Svensson, Bodil Ström Holst
BACKGROUND: Interfering antibodies in human serum and plasma are known to react with mammalian antibodies in immunoassays and cause false-positive test results. Although this phenomenon was recently shown in companion animals, knowledge regarding immunoassay interference in veterinary medicine is very limited. OBJECTIVES: The aims of this study were to set up a species-independent immunoassay procedure to detect interference in serum samples, to screen for interference in a cross-section of canine and feline patient samples from an animal hospital, and to determine if the detected interference could be neutralized using an immunoassay based on nonmammalian reagents...
June 2018: Veterinary Clinical Pathology
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