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https://www.readbyqxmd.com/read/27911409/measuring-progressive-neurological-disability-in-a-mouse-model-of-multiple-sclerosis
#1
Francesca Gilli, Darlene B Royce, Andrew R Pachner
After intracerebral infection with the Theiler's Murine Encephalomyelitis Virus (TMEV), susceptible SJL mice develop a chronic-progressive demyelinating disease, with clinical features similar to the progressive forms of multiple sclerosis (MS). The mice show progressive disability with loss of motor and sensory functions, which can be assessed with multiple apparatuses and protocols. Among them, the Rotarod performance test is a very common behavioral test, its advantage being that it provides objective measurements, but it is often used assuming that it is straightforward and simple...
November 14, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27909750/repression-of-proteases-and-hsp90-chaperone-expression-induced-by-an-antiretroviral-in-virulent-environmental-strains-of-cryptococcus-neoformans
#2
Cleber Fernando Serafin, Ana Paula Paris, Claudete Rodrigues Paula, Rita Cássia Garcia Simão, Rinaldo Ferreira Gandra
This study evaluated the effect of the antiretroviral ritonavir on protease secretion in different strains of Cryptococcus neoformans isolated from the environment and investigated the expression of heat shock protein (Hsp90), classically described virulence factors in other yeast in the presence of the same antiretroviral. The presence of the enzyme was detected by the formation of a degradation of the halo around the colonies. The results were classified as follows: level 1 (without proteases), level 2 (positive for proteases), and level 3 (strongly positive for proteases)...
December 2, 2016: Microbial Ecology
https://www.readbyqxmd.com/read/27909232/corp-minimizing-the-chances-of-false-positives-and-false-negatives
#3
Douglas Curran-Everett
Statistics is essential to the process of scientific discovery. An inescapable tenet of statistics, however, is the notion of uncertainty which has reared its head within the arena of reproducibility of research. The Journal's recent initiative, Cores of Reproducibility in Physiology, is designed to improve the reproducibility of research: each article is designed to elucidate the principles and nuances of using some piece of scientific equipment or some experimental technique so that other researchers can obtain reproducible results...
December 1, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27908427/the-influence-of-oral-copper-methionine-on-matrix-metalloproteinase-2-gene-expression-and-activation-in-right-sided-heart-failure-induced-by-cold-temperature-a-broiler-chicken-perspective
#4
Mina Bagheri Varzaneh, Hamidreza Rahmani, Rahman Jahanian, Amir Hossein Mahdavi, Corinne Perreau, Gwenn Perrot, Stéphane Brézillon, François-Xavier Maquart
This study was designed to investigate the expression, activation and activity of matrix metalloproteinase-2 (MMP-2) in the heart of broiler chickens reared in cold conditions and fed with copper-methionine supplement at different levels. The chickens (n=480) were randomly allotted to six treatments and four replicates. Treatments included two rearing temperatures (i.e. normal and cold temperatures) each combined with three levels of supplemental copper-methionine (i.e. 0, 100 and 200mg/kg). On d 38 and 45 of age, four broilers from each treatment were sacrificed and their hearts were stored at -80°C...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27908384/dna-replication-after-mutagenic-treatment-in-hordeum-vulgare
#5
Jolanta Kwasniewska, Arita Kus, Monika Swoboda, Agnieszka Braszewska-Zalewska
The temporal and spatial properties of DNA replication in plants related to DNA damage and mutagenesis is poorly understood. Experiments were carried out to explore the relationships between DNA replication, chromatin structure and DNA damage in nuclei from barley root tips. We quantitavely analysed the topological organisation of replication foci using pulse EdU labelling during the S phase and its relationship with the DNA damage induced by mutagenic treatment with maleic hydrazide (MH), nitroso-N-methyl-urea (MNU) and gamma ray...
December 2016: Mutation Research
https://www.readbyqxmd.com/read/27907085/the-natural-variation-in-lifespans-of-single-yeast-cells-is-related-to-variation-in-cell-size-ribosomal-protein-and-division-time
#6
Georges E Janssens, Liesbeth M Veenhoff
There is a large variability in lifespans of individuals even if they are genetically identical and raised under the same environmental conditions. Our recent system wide study of replicative aging in baker's yeast predicts that protein biogenesis is a driver of aging. Here, we address how the natural variation in replicative lifespan within wild-type populations of yeast cells correlates to three biogenesis-related parameters, namely cell size, ribosomal protein Rpl13A-GFP levels, and division times. Imaging wild type yeast cells in microfluidic devices we observe that in all cells and at all ages, the division times as well as the increase in cell size that single yeast undergo while aging negatively correlate to their lifespan...
2016: PloS One
https://www.readbyqxmd.com/read/27907010/viral-metagenomic-analysis-displays-the-co-infection-situation-in-healthy-and-pmws-affected-pigs
#7
Anne-Lie Blomström, Caroline Fossum, Per Wallgren, Mikael Berg
The development of high-throughput sequencing technologies have allowed the possibility to investigate and characterise the entire microbiome of individuals, providing better insight to the complex interaction between different microorganisms. This will help to understand how the microbiome influence the susceptibility of secondary agents and development of disease. We have applied viral metagenomics to investigate the virome of lymph nodes from Swedish pigs suffering from the multifactorial disease postweaning multisystemic wasting syndrome (PMWS) as well as from healthy pigs...
2016: PloS One
https://www.readbyqxmd.com/read/27906748/evolving-therapies-for-hepatitis-c-virus-in-chronic-kidney-disease-the-beginning-of-a-new-era
#8
Craig E Gordon, Claudia Nader
PURPOSE OF REVIEW: The current review highlights recent advances in treatment of chronic hepatitis C virus infection using new classes of agents, direct-acting antivirals (DAAs), with a focus on the evidence for their use in the setting of chronic kidney disease (CKD) stages 4-5, hemodialysis, and kidney transplantation. RECENT FINDINGS: DAA agents target-specific proteins involved in the hepatitis C virus life cycle and interrupt viral replication. Sustained virologic response, a marker of viral eradication, occurs in more than 90% of patients treated with DAA agents in the general population...
November 30, 2016: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/27903804/structural-protein-vp2-of-african-horse-sickness-virus-is-not-essential-for-virus-replication-in-vitro
#9
René G P van Gennip, Sandra G P van de Water, Christiaan A Potgieter, Piet A van Rijn
: The Reoviridae family consists of non-enveloped multi-layered viruses with a double stranded RNA genome consisting of 9 to 12 genome segments. The Orbivirus genus of the Reoviridae family contains African horse sickness virus (AHSV), bluetongue virus and epizootic haemorrhagic disease virus causing notifiable diseases and are spread by biting Culicoides species. Here, we used reverse genetics for AHSV to study the role of outer capsid protein VP2 encoded by genome segment 2 (Seg-2)...
November 30, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27903802/a-protective-role-for-il-1-signaling-during-mouse-adenovirus-type-1-induced-encephalitis
#10
Luiza A Castro-Jorge, Carla Pretto, Asa Smith, Oded Foreman, Kelly E Carnahan, Katherine R Spindler
: IL-1β, an inflammatory cytokine and IL-1 receptor ligand, has diverse activities in the brain. We examined whether IL-1 signaling contributes to the encephalitis observed in mouse adenovirus type 1 (MAV-1) infection, using mice lacking the IL-1 receptor, Il1r1(-/-) Il1r1(-/-) mice had lower survival, higher disruption of the blood-brain barrier (BBB), higher brain viral loads, and higher brain inflammatory cytokines and chemokines than control C57BL/6 mice. We also examined infections of mice defective in IL-1β production (Pycard(-/-)mice) and mice defective in trafficking of TLRs to the endosome (Unc93b1(-/-) mice)...
November 30, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27903655/random-versus-cell-cycle-regulated-replication-initiation-in-bacteria-insights-from-studying-vibrio-cholerae-chromosome-2
#11
REVIEW
Revathy Ramachandran, Jyoti Jha, Johan Paulsson, Dhruba Chattoraj
Bacterial chromosomes initiate replication at a fixed time in the cell cycle, whereas there is generally no particular time for plasmid replication initiation or chromosomal replication initiation from integrated plasmids. In bacteria with divided genomes, the replication system of one of the chromosomes typically resembles that of bacteria with undivided genomes, whereas the remaining chromosomes have plasmid-like replication systems. For example, in Vibrio cholerae, a bacterium with two chromosomes (chromosome 1 [Chr1] and Chr2), the Chr1 system resembles that of the Escherichia coli chromosome, and the Chr2 system resembles that of iteron-based plasmids...
March 2017: Microbiology and Molecular Biology Reviews: MMBR
https://www.readbyqxmd.com/read/27903072/a-5-non-coding-exon-containing-engineered-intron-enhances-transgene-expression-from-recombinant-aav-vectors-in-vivo
#12
Jiamiao Lu, James A Williams, James Luke, Feijie Zhang, Kirk Chu, Mark A Kay
We previously developed a mini-intronic plasmid (MIP) expression system in which the essential bacterial elements for plasmid replication and selection are placed within an engineered intron contained within a universal 5'UTR non-coding exon. Like minicircle DNA plasmids (devoid of bacterial backbone sequences), MIP plasmids overcome transcriptional silencing of the transgene. However, in addition MIP plasmids increase transgene expression by 2 and often >10 times higher than minicircle vectors in vivo and in vitro...
November 30, 2016: Human Gene Therapy
https://www.readbyqxmd.com/read/27901465/livestock-susceptibility-to-infection-with-middle-east-respiratory-syndrome-coronavirus
#13
Júlia Vergara-Alert, Judith M A van den Brand, W Widagdo, Marta Muñoz, Stalin Raj, Debby Schipper, David Solanes, Ivan Cordón, Albert Bensaid, Bart L Haagmans, Joaquim Segalés
Middle East respiratory syndrome (MERS) cases continue to be reported, predominantly in Saudi Arabia and occasionally other countries. Although dromedaries are the main reservoir, other animal species might be susceptible to MERS coronavirus (MERS-CoV) infection and potentially serve as reservoirs. To determine whether other animals are potential reservoirs, we inoculated MERS-CoV into llamas, pigs, sheep, and horses and collected nasal and rectal swab samples at various times. The presence of MERS-CoV in the nose of pigs and llamas was confirmed by PCR, titration of infectious virus, immunohistochemistry, and in situ hybridization; seroconversion was detected in animals of both species...
February 15, 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/27901019/additives-for-vaccine-storage-to-improve-thermal-stability-of-adenoviruses-from-hours-to-months
#14
Maria Pelliccia, Patrizia Andreozzi, Jayson Paulose, Marco D'Alicarnasso, Valeria Cagno, Manuela Donalisio, Andrea Civra, Rebecca M Broeckel, Nicole Haese, Paulo Jacob Silva, Randy P Carney, Varpu Marjomäki, Daniel N Streblow, David Lembo, Francesco Stellacci, Vincenzo Vitelli, Silke Krol
Up to 80% of the cost of vaccination programmes is due to the cold chain problem (that is, keeping vaccines cold). Inexpensive, biocompatible additives to slow down the degradation of virus particles would address the problem. Here we propose and characterize additives that, already at very low concentrations, improve the storage time of adenovirus type 5. Anionic gold nanoparticles (10(-8)-10(-6) M) or polyethylene glycol (PEG, molecular weight ∼8,000 Da, 10(-7)-10(-4) M) increase the half-life of a green fluorescent protein expressing adenovirus from ∼48 h to 21 days at 37 °C (from 7 to >30 days at room temperature)...
November 30, 2016: Nature Communications
https://www.readbyqxmd.com/read/27899750/circulating-micrornas-as-novel-biomarkers-of-stenosis-progression-in-asymptomatic-carotid-stenosis
#15
Sandra Dolz, David Górriz, José Ignacio Tembl, Dolors Sánchez, Gerardo Fortea, Vera Parkhutik, Aida Lago
BACKGROUND AND PURPOSE: Progression of asymptomatic carotid artery stenosis (ACAS) in patients with >50% luminal narrowing is considered a potential risk factor for ischemic stroke; however, subclinical molecular biomarkers of ACAS progression are lacking. Recent studies suggest a regulatory function for several microRNAs (miRNAs) on the evolution of carotid plaque, but its role in ACAS progression is mostly unknown. The aim of our study was to investigate a wide miRNA panel in peripheral blood exosomes from patients with ACAS to associate circulating miRNA expression profiles with stenosis progression...
November 29, 2016: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/27899618/rna-seq-mixology-designing-realistic-control-experiments-to-compare-protocols-and-analysis-methods
#16
Aliaksei Z Holik, Charity W Law, Ruijie Liu, Zeya Wang, Wenyi Wang, Jaeil Ahn, Marie-Liesse Asselin-Labat, Gordon K Smyth, Matthew E Ritchie
Carefully designed control experiments provide a gold standard for benchmarking different genomics research tools. A shortcoming of many gene expression control studies is that replication involves profiling the same reference RNA sample multiple times. This leads to low, pure technical noise that is atypical of regular studies. To achieve a more realistic noise structure, we generated a RNA-sequencing mixture experiment using two cell lines of the same cancer type. Variability was added by extracting RNA from independent cell cultures and degrading particular samples...
November 29, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27899013/in-vitro-antiviral-activity-of-ribavirin-against-severe-fever-with-thrombocytopenia-syndrome-virus
#17
Myung Jin Lee, Kye-Hyung Kim, Jongyoun Yi, Su Jin Choi, Pyoeng Gyun Choe, Wan Beom Park, Nam Joong Kim, Myoung-Don Oh
Background/Aims: Severe fever with thrombocytopenia syndrome (SFTS) is an emerging infectious disease caused by severe fever with thrombocytopenia syndrome virus (SFTSV), a novel bunyavirus. As yet, there is no effective antiviral therapy for SFTS. Ribavirin is a broad-spectrum antiviral agent, which has been tried for treatment of SFTS. In this study, antiviral activity of ribavirin against SFTSV has been investigated. Methods: Vero cell-grown SFTSV strain Gangwon/Korea/2012 was treated with ribavirin at various concentrations...
November 30, 2016: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/27898938/effects-of-varying-floor-space-on-aggressive-behavior-and-cortisol-concentrations-in-group-housed-sows
#18
P H Hemsworth, R S Morrison, A J Tilbrook, K L Butler, M Rice, S J Moeller
Floor space is an important determinant of aggression and stress in group-housed sows, and the aim of the present experiment was to comprehensively examine the effects of floor space in the range of 1.45 to 2.90 m/sow from mixing until 27 d after insemination on aggression, stress, and reproduction of group-housed sows. A previous experiment on the effects of floor space indicated spatial variability across and along the research facility in both sow aggression and stress. To minimize this spatial variability within the research facility, similar-sized pens but with varying groups sizes (10-20) in 4 separate blocks of 3 contiguous pens within each of 9 time replicates (180 sows/replicate) were used to examine 6 space allowances (1...
November 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898884/the-progression-of-deoxynivalenol-induced-growth-suppression-in-nursery-pigs-and-the-potential-of-an-algae-modified-montmorillonite-clay-to-mitigate-these-effects
#19
H L Frobose, J A Erceg, S Q Fowler, M D Tokach, J M DeRouchey, J C Woodworth, S S Dritz, R D Goodband
Two experiments were conducted to characterize the progression of deoxynivalenol (DON)-induced growth suppression and to investigate algae-modified montmorillonite clay (AMMC) as a means to alleviate the effects of DON in nursery pigs. In both experiments, naturally DON-contaminated wheat was used to produce diets with desired DON levels. In Exp. 1, 280 barrows and gilts (10.0 ± 0.2 kg BW) were used in a 28-d experiment arranged in a 2 × 2 + 1 factorial design with 8 replicates per treatment. The 5 treatments consisted of 2 positive control (PC) diets with DON below detection limits and with or without 0 or 0...
September 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898860/effects-of-collection-time-on-flow-of-chromium-and-dry-matter-and-on-basal-ileal-endogenous-losses-of-amino-acids-in-growing-pigs
#20
B G Kim, Y Liu, H H Stein
The objectives of this experiment were to examine the diurnal patterns of chromium and DM flow at the distal ileum of pigs and to determine the effect of collection time on basal ileal endogenous losses (BEL) of CP and AA. Eight barrows with an initial BW of 34.6kg (SD = 2.1) were individually fitted with a T-cannula in the distal ileum and randomly allotted to a replicated 4× 4 Latin square design with 4 diets and 4 periods in each square. Three diets contained either corn, soybean meal, or distillers dried grains with solubles as the sole source of CP and AA...
October 2016: Journal of Animal Science
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