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Viral Diagnostics

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https://www.readbyqxmd.com/read/27920668/getting-mirna-therapeutics-into-the-target-cells-for-neurodegenerative-diseases-a-mini-review
#1
REVIEW
Ming Ming Wen
miRNAs play important roles in modulating gene expression in varying cellular processes and disease pathogenesis, including neurodegenerative diseases. Several miRNAs are expressed in the brain, control brain development and are identified as important biomarkers in the pathogenesis of motor-and neuro-cognitive diseases such as Alzheimer's (AD), Huntington's and Parkinson's diseases (PD) and amyotrophic lateral sclerosis. These remarkable miRNAs could be used as diagnostic markers and therapeutic targeting potential for many stressful and untreatable progressive neurodegenerative diseases...
2016: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/27920481/new-real-time-pcr-method-to-identify-single-point-mutations-in-hepatitis-c-virus
#2
Qian Chen, Irene Belmonte, Maria Buti, Leonardo Nieto, Damir Garcia-Cehic, Josep Gregori, Celia Perales, Laura Ordeig, Meritxell Llorens, Maria Eugenia Soria, Rafael Esteban, Juan Ignacio Esteban, Francisco Rodriguez-Frias, Josep Quer
AIM: To develop a fast, low-cost diagnostic strategy to identify single point mutations in highly variable genomes such as hepatitis C virus (HCV). METHODS: In patients with HCV infection, resistance-associated amino acid substitutions within the viral quasispecies prior to therapy can confer decreased susceptibility to direct-acting antiviral agents and lead to treatment failure and virological relapse. One such naturally occurring mutation is the Q80K substitution in the HCV-NS3 protease gene, which confers resistance to PI inhibitors, particularly simeprevir...
November 21, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27920176/laboratory-diagnosis-of-chikungunya-virus-infections-and-commercial-sources-for-diagnostic-assays
#3
Barbara W Johnson, Brandy J Russell, Christin H Goodman
Detection of chikungunya virus (CHIKV) or viral RNA is the primary laboratory test used to diagnose infection in serum collected <6 days after onset of illness. Two real-time reverse transcription-polymerase chain reaction (RT-PCR) kits are available commercially, but validity data are limited. There are 2 commercial sources of inactivated positive-control CHIKV RNA to be used with purchased primers. The Centers for Disease Control and Prevention provides viral RNA-positive controls and primer and probe nucleotide sequences for real-time RT-PCR testing...
December 15, 2016: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27919639/-evaluation-of-an-xpert-ev-cepheid-%C3%A2-molecular-diagnostic-technique-for-enteroviral-meningitis
#4
Natalia Alonso Pérez, Belén Sagastizabal Cardelus, Luis Manuel Prieto Tato, Sara Guillén Martín, Ana González Torralba, Isabel García Bermejo, José Tomás Ramos Amador
INTRODUCTION: Polymerase chain reaction (PCR) assays have shown to be useful and quick for the diagnosis of enterovirus in aseptic meningitis. The aim of our study was to analyse the changes in clinical practice after the introduction of a real-time polymerase chain reaction (RT-PCR) technique using the Xpert EV (Cepheid(®)) assay for the qualitative detection of enterovirus RNA in cerebrospinal fluid specimens from children with suspected viral meningitis. METHODS: A retrospective study was performed in children older than 1year, diagnosed with enterovirus meningitis in a third level hospital from November 2006 to February 2013...
December 2, 2016: Anales de Pediatría: Publicación Oficial de la Asociación Española de Pediatría (A.E.P.)
https://www.readbyqxmd.com/read/27918640/label-free-virus-capture-and-release-by-a-microfluidic-device-integrated-with-porous-silicon-nanowire-forest
#5
Yiqiu Xia, Yi Tang, Xu Yu, Yuan Wan, Yizhu Chen, Huaguang Lu, Si-Yang Zheng
Viral diseases are perpetual threats to human and animal health. Detection and characterization of viral pathogens require accurate, sensitive, and rapid diagnostic assays. For field and clinical samples, the sample preparation procedures limit the ultimate performance and utility of the overall virus diagnostic protocols. This study presents the development of a microfluidic device embedded with porous silicon nanowire (pSiNW) forest for label-free size-based point-of-care virus capture in a continuous curved flow design...
December 5, 2016: Small
https://www.readbyqxmd.com/read/27917707/management-of-pneumonia-in-the-pediatric-critical-care-unit-an-area-for-antimicrobial-stewardship
#6
Aimee M Dassner, David P Nicolau, Jennifer E Girotto
Pediatric pneumonia is one of the most common causes of childhood infection requiring hospitalization and is a substantial driver of antimicrobial use among hospitalized children. About 12-20% of pediatric patients hospitalized with community-acquired pneumonia (CAP) require critical care. Additionally, nosocomial pneumonias (i.e. hospital-acquired and ventilator-associated pneumonias) are responsible for 15-53% of hospital-associated infections and are the most common indication for empiric antibiotics in the pediatric intensive care unit...
December 4, 2016: Current Pediatric Reviews
https://www.readbyqxmd.com/read/27916668/development-of-a-novel-real-time-rt-pcr-assay-to-detect-seneca-valley-virus-1-associated-with-emerging-cases-of-vesicular-disease-in-pigs
#7
Veronica L Fowler, Russell H Ransburgh, Elizabeth G Poulsen, Jemma Wadsworth, Donald P King, Valerie Mioulet, Nick J Knowles, Susanna Williamson, Xuming Liu, Gary A Anderson, Ying Fang, Jianfa Bai
Seneca Valley virus 1 (SVV-1) can cause vesicular disease that is clinically indistinguishable from foot-and-mouth disease, vesicular stomatitis and swine vesicular disease. SVV-1-associated disease has been identified in pigs in several countries, namely USA, Canada, Brazil and China. Diagnostic tests are required to reliably detect this emerging virus, and this report describes the development and evaluation of a novel real-time (r) reverse-transcription (RT) PCR assay (rRT-PCR), targeting the viral polymerase gene (3D) of SVV-1...
January 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/27916667/development-and-validation-of-an-immunohistochemistry-procedure-for-the-detection-of-a-neurotropic-bovine-astrovirus
#8
Céline L Boujon, Senija Selimovic-Hamza, Ilias Bouzalas, Torsten Seuberlich
Members of the Astroviridae family are best known to cause diarrhea in different mammalian species. Lately, some strains have been associated with encephalitis in humans, minks and cattle. In this study, we developed an immunohistochemistry (IHC) procedure for the detection of a neurotropic bovine astrovirus (BoAstV-CH13/NeuroS1), which is associated with non-suppurative encephalitis in cattle. We expressed five recombinant antigens corresponding to different putative viral proteins of BoAstV-CH13/NeuroS1. Antigens were then used for the production of hyperimmune sera in rabbits...
January 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/27916546/new-direct-acting-antivirals-for-patients-with-chronic-hcv-infection-can-we-monitor-treatment-using-an-hcv-core-antigen-assay
#9
R Alonso, F Pérez-García, D Ampuero, E Reigadas, E Bouza
We evaluated the diagnostic usefulness of an HCV core antigen (HCV-Ag) assay in HCV-infected patients undergoing treatment with direct-acting antivirals. We analyzed 103 samples from 28 patients. Compared with RT-PCR, sensitivity was 96.2% and specificity was 100%. The correlation between techniques was excellent (Pearson coefficient: 0.871). HCV-Ag proved to be useful in patients with sustained viral response and in patients who experienced treatment failures.
November 17, 2016: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/27914475/an-observational-study-of-febrile-seizures-the-importance-of-viral-infection-and-immunization
#10
Joshua R Francis, Peter Richmond, Christine Robins, Katie Lindsay, Avram Levy, Paul V Effler, Meredith Borland, Christopher C Blyth
BACKGROUND: Febrile seizures are common in young children. Annual peaks in incidence mirror increased respiratory virus activity during winter. Limited virological data are available using modern diagnostic techniques for children with febrile seizures. We aimed to determine the frequency of detection of specific viral pathogens in children with febrile seizures, to describe risk factors including recent vaccination and clinical features associated with specific etiologies. METHODS: An observational study was performed...
December 3, 2016: BMC Pediatrics
https://www.readbyqxmd.com/read/27914455/mediators-and-biomarkers-of-inflammation-in-meningitis-cytokine-and-peptidome-profiling-of-cerebrospinal-fluid
#11
A A Belogurov, O M Ivanova, Y A Lomakin, R H Ziganshin, M I Vaskina, V D Knorre, E A Klimova, A G Gabibov, V T Ivanov, V M Govorun
Differential diagnosis of bacterial and viral meningitis is an urgent problem of the modern clinical medicine. Early and accurate detection of meningitis etiology largely determines the strategy of its treatment and significantly increases the likelihood of a favorable outcome for the patient. In the present work, we analyzed the peptidome and cytokine profiles of cerebrospinal fluid (CSF) of 17 patients with meningitis of bacterial and viral etiology and of 20 neurologically healthy controls. In addition to the identified peptides (potential biomarkers), we found significant differences in the cytokine status of the CSF of the patients...
November 2016: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/27909306/rpl5-on-1p22-1-is-recurrently-deleted-in-multiple-myeloma-and-its-expression-is-linked-to-bortezomib-response
#12
I J F Hofman, M Van Duin, E De Bruyne, L Fancello, G Mulligan, E Geerdens, E Garelli, C Mancini, H Lemmens, M Delforge, P Vandenberghe, I Wlodarska, A Aspesi, L Michaux, K Vanderkerken, P Sonneveld, K De Keersmaecker
Chromosomal region 1p22 is deleted in ⩾20% of multiple myeloma (MM) patients, suggesting the presence of an unidentified tumor suppressor. Using high-resolution genomic profiling, we delimit a 58 kb minimal deleted region (MDR) on 1p22.1 encompassing two genes: ectopic viral integration site 5 (EVI5) and ribosomal protein L5 (RPL5). Low mRNA expression of EVI5 and RPL5 was associated with worse survival in diagnostic cases. Patients with 1p22 deletion had lower mRNA expression of EVI5 and RPL5, however, 1p22 deletion status is a bad predictor of RPL5 expression in some cases, suggesting that other mechanisms downregulate RPL5 expression...
December 2, 2016: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/27908400/low-hepatic-copper-content-and-pnpla3-polymorphism-in-non-alcoholic-fatty-liver-disease-in-patients-without-metabolic-syndrome
#13
Albert Friedrich Stättermayer, Stefan Traussnigg, Elmar Aigner, Christian Kienbacher, Ursula Huber-Schönauer, Petra Steindl-Munda, Andreas Stadlmayr, Friedrich Wrba, Michael Trauner, Christian Datz, Peter Ferenci
INTRODUCTION: The pathogenesis of non-alcoholic fatty liver disease (NAFLD) is multifactorial including metabolic, genetic (e.g. PNPLA3 [patatin-like phospholipase domain-containing 3 gene]), viral factors and drugs. Besides, there is evidence for a role of copper deficiency. Aim of the study was to evaluate the role of hepatic copper content, PNPLA3 in NAFLD patients with and without metabolic syndrome (MetS). METHODS: One-hundred seventy-four NAFLD patients, who underwent liver biopsy for diagnostic work-up, were studied...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27904767/mir-146a-suppresses-hepatocellular-carcinoma-by-downregulating-traf6
#14
Yong Zu, Yanhong Yang, Jiyun Zhu, Xiaobo Bo, Shuangxing Hou, Bo Zhang, Jiangfeng Qiu, Jing Zheng
MicroRNAs have been proven to play important roles in many biological processes such as cellular growth and differentiation, apoptosis, and modulation of host response to viral infection. In the present study, we find that the expression of miR-146a was decreased in hepatocellular carcinoma (HCC) tissues compared with corresponding adjacent tissues, and the expression level in HCC cell lines was lower than in a normal liver cell. Over-expression suppressed the proliferation and invasion of HCC cells. In addition, luciferase reporter assays and western blotting confirmed that miR-146a directly target TRAF6 which attenuated the effect of miR-146a on cell proliferation and invasion in HepG2 and SMMC7721 cells...
2016: American Journal of Cancer Research
https://www.readbyqxmd.com/read/27904520/a-diagnostic-one-step-real-time-reverse-transcription-polymerase-chain-reaction-method-for-accurate-detection-of-influenza-virus-type-a
#15
Mohammad Amin Behzadi, Mazyar Ziyaeyan, Abdolvahab Alborzi
INTRODUCTION: Influenza A is known as a public health concern worldwide. In this study, a novel one-step real-time reverse transcription polymerase chain reaction (rtRT-PCR) assay was designed and optimized for the detection of influenza A viruses. MATERIAL AND METHODS: The primers and probe were designed based on the analysis of 90 matrix nucleotide sequence data of influenza type A subtypes from the GenBank database of the National Center for Biotechnology Information (NCBI)...
December 1, 2016: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/27903234/acute-phase-proteins-and-their-potential-role-as-an-indicator-for-fish-health-and-in-diagnosis-of-fish-diseases
#16
Suvra Roy, Vikash Kumar, Vikas Kumar, B K Behera
The acute phase proteins are biochemically and functionally unrelated protein predominantly synthesized in the liver. The local inflammatory cells i.e. macrophages and neutrophils secretes various cytokines like IL-1, IL-6, IL-8 (interleukins) and TNF-α into bloodstream in response to injury and tissue damage, which stimulate hepatocytes to produce protein and release them into the circulation; these proteins are called as acute phase protein (e.g. C-reactive protein (CRP), serum amyloid A (SAA), metal binding protein, lysozyme, lectin, etc...
November 21, 2016: Protein and Peptide Letters
https://www.readbyqxmd.com/read/27902909/marek-s-disease-in-backyard-chickens-a-study-of-pathologic-findings-and-viral-loads-in-tumorous-and-nontumorous-birds
#17
Aslı Mete, Radhika Gharpure, Maurice E Pitesky, Dan Famini, Karen Sverlow, John Dunn
Marek's disease (MD) is a major cause of mortality in backyard chickens. The diagnosis of MD is complex, however, and knowledge of Marek's disease virus (MDV) in spontaneous field cases such as in backyard chickens is largely unknown. In this study, 40 backyard chickens with a presumptive MD diagnosis based on histologic lymphoid infiltrations in peripheral nerves with and without lymphomas were investigated. Twenty-eight of the birds were submitted to the diagnostic laboratory for disease explorations, and 12 chickens were from a flock in which some members demonstrated anisocoria and pupil irregularities compatible with ocular MD...
December 2016: Avian Diseases
https://www.readbyqxmd.com/read/27902602/sensitivity-and-specificity-of-dried-blood-spots-for-hiv-1-viral-load-quantification-a-laboratory-assessment-of-3-commercial-assays
#18
Pieter Pannus, Maarten Claus, Maria Mercedes Perez Gonzalez, Nathan Ford, Katrien Fransen
The use of dried blood spots (DBS) instead of plasma as a specimen type for HIV-1 viral load (VL) testing facilitates the decentralization of specimen collection and can increase access to VL testing in resource-limited settings. The performance of DBS for VL testing is lower, however, when compared to the gold standard sample type plasma. In this diagnostic accuracy study, we evaluated 3 VL assays with DBS.Participants were recruited between August 2012 and April 2015. Both plasma and DBS specimens were prepared and tested for HIV-1 VL with the Roche CAP/CTM HIV-1 test v2...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27899992/beside-p53-and-pten-identification-of-molecular-alterations-of-the-ras-mapk-and-pi3k-akt-signaling-pathways-in-high-grade-serous-ovarian-carcinomas-to-determine-potential-novel-therapeutic-targets
#19
Shuhui Chen, Elisa Cavazza, Catherine Barlier, Julia Salleron, Pierre Filhine-Tresarrieu, Céline Gavoilles, Jean-Louis Merlin, Alexandre Harlé
Despite great histological and molecular heterogeneity, the clinical management of high-grade ovarian carcinomas remains unspecialized. As a major subgroup, high-grade serous ovarian carcinomas (HGSOCs) require novel therapies. In addition to utilizing conventional histological prognostic markers and performing oncogenetic investigations, the molecular diagnostic method of next generation sequencing (NGS) was performed to identify 'druggable' targets that could provide access to innovative therapy. The present study was performed in 45 HGSOC patients (mean age, 59...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27896251/combined-sybr-green-real-time-polymerase-chain-reaction-and-microarray-method-for-the-simultaneous-determination-of-human-papillomavirus-loads-and-genotypes
#20
Hyun Hee Seo, Young Jun Kim, Mi Seon Jeong, Sung Ran Hong, In Ho Lee, Kyeong A So, Mi-Kyung Kim, Yoo Kyung Lee, Ki Heon Lee, Juree Kim, Sung Jae Kim, Tae Jin Kim
OBJECTIVE: The aim of this study was to describe the principle of the Cheil HPV DNA Chip assay and evaluate its accuracy. In order to quantify the human papillomavirus (HPV) load and identify HPV genotypes simultaneously, this assay combined the two methods: SYBR Green quantitative real-time polymerase chain reaction (PCR) and DNA microarray. METHODS: We designed novel consensus primer sets that target the conserved region of the HPV L1 gene for quantifying and detecting a broad range of HPV types by quantitative real-time PCR...
November 2016: Obstetrics & Gynecology Science
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