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https://www.readbyqxmd.com/read/28343780/propagation-of-brazilian-zika-virus-strains-in-static-and-suspension-cultures-using-vero-and-bhk-cells
#1
Alexander Nikolay, Leda R Castilho, Udo Reichl, Yvonne Genzel
The recent spread of Zika virus (ZIKV) in the Americas and the Pacific has reached alarming levels in more than 60 countries. However, relatively little is known about the disease on a virological and epidemiological level and its consequences for humans. Accordingly, a large demand for in vitro derived Brazilian ZIKV material to support in vitro and in vivo studies has arisen. However, a prompt supply of ZIKV and ZIKV antigens cannot be guaranteed as the production of this virus typically using Vero or C6/36 cell lines remains challenging...
March 23, 2017: Vaccine
https://www.readbyqxmd.com/read/28342892/comparison-of-three-cell-based-drug-screening-platforms-for-hsv-1-infection
#2
Leonardo D'Aiuto, Kelly Williamson, Peter Dimitrion, James McNulty, Carla E Brown, Chanti Babu Dokuburra, Alexander J Nielsen, Wen Jing Lin, Paolo Piazza, Mark E Schurdak, Joel Wood, Robert H Yolken, Paul R Kinchington, David C Bloom, Vishwajit L Nimgaonkar
Acyclovir (ACV) and its derivatives have been highly effective for treating recurrent, lytic infections with Herpes Simplex Virus, type 1 (HSV-1), but searches for additional antiviral drugs are motivated by recent reports of resistance to ACV, particularly among immunocompromised patients. In addition, the relative neurotoxicity of ACV and its inability to prevent neurological sequelae among HSV-1 encephalitis survivors compel searches for new drugs to treat HSV-1 infections of the central nervous system (CNS)...
March 22, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28342667/a-fast-and-efficient-purification-platform-for-cell-based-influenza-viruses-by-flow-through-chromatography
#3
Yu-Fen Tseng, Tsai-Chuan Weng, Chia-Chun Lai, Po-Ling Chen, Min-Shi Lee, Alan Yung-Chih Hu
Since newly emerging influenza viruses with pandemic potentials occurred in recent years, the demand for producing pandemic influenza vaccines for human use is high. For the development of a quick and efficient vaccine production, we proposed an efficient purification platform from the harvest to the purified bulk for the cell-based influenza vaccine production. This platform based on flow-through chromatography and filtration steps and the process only involves a few purification steps, including depth filtration, inactivation by formaldehyde, microfiltration, ultrafiltration, anion-exchange and ligand-core chromatography and sterile filtration...
March 22, 2017: Vaccine
https://www.readbyqxmd.com/read/28338676/dirhamnolipids-secreted-from-pseudomonas-aeruginosa-modify-anjpegungal-susceptibility-of-aspergillus-fumigatus-by-inhibiting-%C3%AE-1-3-glucan-synthase-activity
#4
Benoit Briard, Vero Rasoldier, Perrine Bomme, Noureddine ElAouad, Catherine Guerreiro, Pierre Chassagne, Laetitia Muszkieta, Jean-Paul Latgé, Laurence Mulard, Anne Beauvais
Pseudomonas aeruginosa and Aspergillus fumigatus are the two microorganisms responsible for most of the chronic infections in cystic fibrosis patients. P. aeruginosa is known to produce quorum-sensing controlled rhamnolipids during chronic infections. Here we show that the dirhamnolipids secreted from P. aeruginosa (i) induce A. fumigatus to produce an extracellular matrix, rich in galactosaminogalactan, 1,8-dihydroxynaphthalene (DHN)- and pyo-melanin, surrounding their hyphae, which facilitates P. aeruginosa binding and (ii) inhibit A...
March 24, 2017: ISME Journal
https://www.readbyqxmd.com/read/28336600/complete-genome-sequences-before-and-after-mammalian-cell-culture-of-zika-virus-isolated-from-the-serum-of-a-symptomatic-male-patient-from-oaxaca-mexico
#5
Celia Boukadida, Jesús M Torres-Flores, Martha Yocupicio-Monroy, Elvira Piten-Isidro, Amaranta Y Rivero-Arrieta, Yara A Luna-Villalobos, Liliane Martínez-Vargas, Sofía L Alcaraz-Estrada, Klintsy J Torres, Rosalia Lira, Gustavo Reyes-Terán, Edgar E Sevilla-Reyes
Zika virus (ZIKV) is an emerging arthropod-borne flavivirus associated with severe congenital malformations and neurological complications. Although the ZIKV genome is well characterized, there is limited information regarding changes after cell isolation and culture adaptation. We isolated, and passaged in Vero cells, ZIKV from the serum of a symptomatic male patient and compared the viral genomes before and after culture. Single nucleotide polymorphisms were characteristic among serum-circulating genomes, while such diversity decreased after cell culture...
March 23, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28336346/antiviral-activity-of-the-adenosine-analogue-bcx4430-against-west-nile-virus-and-tick-borne-flaviviruses
#6
Luděk Eyer, Darina Zouharová, Jana Širmarová, Martina Fojtíková, Michal Štefánik, Jan Haviernik, Radim Nencka, Erik de Clercq, Daniel Růžek
There are currently no approved antiviral therapies against medically important human flaviviruses. The imino-C-nucleoside BCX4430 shows broad-spectrum antiviral activity against a wide range of RNA viruses. Here, we demonstrate that BCX4430 inhibits tick-borne species of the genus Flavivirus; however, the antiviral effect varies against individual species. Micro-molar BCX4430 levels inhibited tick-borne encephalitis virus (TBEV); while, approximately 3-8-fold higher concentrations were needed to inhibit louping ill virus and Kyasanur Forest disease virus...
March 21, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28335220/pde5-inhibitors-loaded-nanovesicles-physico-chemical-properties-and-in-vitro-antiproliferative-activity
#7
Roberta F De Rose, Maria Chiara Cristiano, Marilena Celano, Valentina Maggisano, Ada Vero, Giovanni Enrico Lombardo, Martina Di Francesco, Donatella Paolino, Diego Russo, Donato Cosco
Novel therapeutic approaches are required for the less differentiated thyroid cancers which are non-responsive to the current treatment. In this study we tested an innovative formulation of nanoliposomes containing sildenafil citrate or tadalafil, phosphodiesterase-5 inhibitors, on two human thyroid cancer cell lines (TPC-1 and BCPAP). Nanoliposomes were prepared by the thin layer evaporation and extrusion methods, solubilizing the hydrophilic compound sildenafil citrate in the aqueous phase during the hydration step and dissolving the lipophilic tadalafil in the organic phase...
May 18, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28332001/ncam1-is-the-target-of-mirna-572-validation-in-the-human-oligodendroglial-cell-line
#8
Roberta Mancuso, Simone Agostini, Ivana Marventano, Ambra Hernis, Marina Saresella, Mario Clerici
The neural cell adhesion molecule 1 (NCAM1) is a fundamental protein in cell-cell interaction and in cellular developmental processes, and its dysregulation is involved in a number of diseases including multiple sclerosis. Studies in rats suggest that the modulation of NCAM1 expression is regulated by miRNA-572, but no data are available confirming such interaction in the human system. We analyzed whether this is the case using a human oligodendroglial cell line (MO3.13). MO3.13 cells were transfected with miRNA-572 mimic and inhibitor separately; NCAM1 mRNA and protein expression levels were analyzed at different time points after transfection...
March 22, 2017: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/28330747/m-protein-is-sufficient-for-assembly-and-release-of-peste-des-petits-ruminants-virus-like-particles
#9
Qiuxia Wang, Changbo Ou, Yongxi Dou, Lei Chen, Xuelian Meng, Xingyou Liu, Yan Yu, Jinqing Jiang, Jinyou Ma, Zhidong Zhang, Jianhe Hu, Xuepeng Cai
Peste des petits ruminants virus (PPRV), belonging to paramyxoviruses, has six structure proteins (such as matrix protein (M), nucleocapsid proteins (N), fusion protein (F) and hemagglutinin protein (H)) and could cause high morbidity and mortality in sheep and goats. Although a vaccine strain of PPRV has been rescued and co-expression of M and N could yield PPRV-like particles, the roles of structure proteins in virion assembly and release have not been investigated in detail. In this study, plasmids carrying PPRV cDNA sequences encoding the N, M, H, and F proteins were expressed in Vero cells...
March 18, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28329739/peptides-derived-from-glycoproteins-h-and-b-of-herpes-simplex-virus-type-1-and-herpes-simplex-virus-type-2-are-capable-of-blocking-herpetic-infection-in-vitro
#10
Abraham Cetina-Corona, Uriel López-Sánchez, Juana Salinas-Trujano, Alfonso Méndez-Tenorio, Blanca Lilia Barrón, Jesus Torres-Flores
AIMS: The aim of this study was to design peptides derived from glycoproteins H (gH) and B (gB) of herpes simplex viruses type 1 (HSV-1) and type 2 (HSV-2) with the potential to block herpetic infection and to evaluate their ability to inhibit HSV-1 and HSV-2 infection in vitro. METHODS: A library of continuous 15-25 residue stretches (CRSs) located at the surface of gH and gB from HSV-1 and HSV-2 was created. These CRSs were analyzed, and only those that were highly flexible and rich in charged residues were selected for the design of the antiviral peptides (AVPs)...
March 23, 2017: Intervirology
https://www.readbyqxmd.com/read/28327787/overexpression-of-mir-484-and-mir-744-in-vero-cells-alters-dengue-virus-replication
#11
Juan Camilo Castrillón-Betancur, Silvio Urcuqui-Inchima
BACKGROUND: Dengue is considered one of the world's most important mosquito-borne diseases. MicroRNAs (miRNAs) are small non-coding single-stranded RNAs that play an important role in the regulation of gene expression in eukaryotes. Although miRNAs possess antiviral activity against many mammalian-infecting viruses, their involvement in Dengue virus (DENV) replication remains poorly understood. OBJECTIVE: To determine the role of miR-484 and miR-744 in DENV infection and to examine whether DENV infection alters the expression of both miRNAs...
April 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28321790/peste-des-petits-ruminants-infection-in-domestic-ruminants-in-sudan
#12
K S Intisar, Y H Ali, M A Haj, M A T Sahar, M M Shaza, A M Baraa, O M Ishag, Y M Nouri, K M Taha, E M Nada, A M Ahmed, A I Khalafalla, G Libeau, A Diallo
The existence of peste des petits ruminants (PPR) in domestic ruminants and camels in Sudan during 2008-2012 was investigated. Lung tissues and serum samples were randomly collected from sheep, goats, cattle, and camels at different areas of Sudan. A total of 12,384 serum samples were collected from clinically healthy 7413 sheep, 1988 camels, 1501 cattle, 1459 goats, and 23 gazelles at different areas in the Sudan. They were examined for PPR antibodies using competitive ELISA (cELISA). The overall detected seroprevalence of PPR in tested sera was 49...
March 20, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28321262/allium-stipitatum-extract-exhibits-in-vivo-antibacterial-activity-against-methicillin-resistant-staphylococcus-aureus-and-accelerates-burn-wound-healing-in-a-full-thickness-murine-burn-model
#13
Arunkumar Karunanidhi, Ehsanollah Ghaznavi-Rad, Jayakayatri Jeevajothi Nathan, Yusuf Abba, Alex van Belkum, Vasanthakumari Neela
The in vivo antibacterial and burn wound healing potency of Persian shallot bulbs (Allium stipitatum) were explored in a mice burn model infected with methicillin-resistant Staphylococcus aureus (MRSA). Hexane (ASHE) and dichloromethane (ASDE) extracts were tested. Female BALB/c mice were inflicted with third-degree thermal injury followed by infection with MRSA. ASHE and ASDE formulated with simple ointment base (SOB) at concentrations of 1%, 2%, and 5% (w/w) were topically applied to burn wounds twice a day for 20 days...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28296323/dosimetric-accuracy-of-the-cone-beam-ct-based-treatment-planning-of-the-vero-system-a-phantom-study
#14
Indra Yohannes, Heru Prasetio, Karoline Kallis, Christoph Bert
We report an investigation on the accuracy of dose calculation based on the cone-beam computed tomography (CBCT) images of the nonbowtie filter kV imaging system of the Vero linear accelerator. Different sets of materials and tube voltages were employed to generate the Hounsfield unit lookup tables (HLUTs) for both CBCT and fan-beam CT (FBCT) systems. The HLUTs were then implemented for the dose calculation in a treatment planning system (TPS). Dosimetric evaluation was carried out on an in-house-developed cube phantom that consists of water-equivalent slabs and inhomogeneity inserts...
July 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28291927/single-fraction-radiosurgery-stereotactic-body-radiation-therapy-sbrt-for-spine-metastasis-a-dosimetric-comparison-of-multiple-delivery-platforms
#15
Adrian Nalichowski, Isaac Kaufman, John Gallo, Todd Bossenberger, Tim Solberg, Ezequiel Ramirez, Yulong Yan, Julie Fredrick, Tewfik Bichay, Alan Mayville, Jay Burmeister
There are numerous commercial radiotherapy systems capable of delivering single fraction spine radiosurgery/SBRT. We aim to compare the capabilities of several of these systems to deliver this treatment when following standardized criteria from a national protocol. Four distinct target lesions representing various case presentations of spine metastases were contoured in both the thoracic and lumbar spine of an anthropomorphic SBRT phantom. Single fraction radiosurgery/SBRT plans were designed for each target with each of our treatment platforms...
January 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28285874/selective-fluorescence-sensing-and-quantification-of-uric-acid-by-naphthyridine-based-receptor-in-biological-sample
#16
Prithidipa Sahoo, Sujoy Das, Himadri Sekhar Sarkar, Kalipada Maiti, Md Raihan Uddin, Sukhendu Mandal
Naphthyridine-based fluorescent probe H1 was synthesized and characterized for the quantification and selective detection of Uric Acid (UA) in live cell. In presence of UA, H1 forms the specific host-guest complex mainly through intermolecular hydrogen bonding and aromatic stacking which produces "turn-off" fluorescence. The probe and UA is found to be 1:1 stoichiometry on the basis of absorption and fluorescence titrations. The probe H1 has been shown to detect UA up to 0.6µM at pH 7.4. DFT-TDDFT calculations were performed in order to demonstrate the sensing mechanism and the electronic properties of the receptor-donor complex...
March 3, 2017: Bioorganic Chemistry
https://www.readbyqxmd.com/read/28284624/attenuation-of-an-original-us-porcine-epidemic-diarrhea-virus-strain-pc22a-via-serial-cell-culture-passage
#17
Chun-Ming Lin, Yixuan Hou, Douglas G Marthaler, Xiang Gao, Xinsheng Liu, Lanlan Zheng, Linda J Saif, Qiuhong Wang
Although porcine epidemic diarrhea (PED) has caused huge economic losses in the pork industry worldwide, an effective live, attenuated vaccine is lacking. In this study, an original US, highly virulent PED virus (PEDV) strain PC22A was serially passaged in Vero CCL81 and Vero BI cells. The virus growth kinetics in cell culture, virulence in neonatal pigs and the whole genomic sequences of selected passages were examined. Increased virus titers and sizes of syncytia were observed at the 65th passage level (P65) and P120, respectively...
March 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28283804/enhancement-of-adherence-of-helicobacter-pylori-to-host-cells-by-virus-possible-mechanism-of-development-of-symptoms-of-gastric-disease
#18
Hong Wu, Takashi Nakano, Youichi Suzuki, Yukimasa Ooi, Kouichi Sano
It remains unclear why gastric disease does not develop in all cases of Helicobacter pylori infection. In this study, we analyzed whether simian virus 5 (SV5) enhanced adherence of H. pylori to adenocarcinoma epithelial cells (AGS). H. pylori in AGS (harboring SV5) and SV5-infected Vero cells, and an agglutination of H. pylori mixed with SV5 were observed by light microscopy, scanning and transmission electron microscopies. The adherent rate of H. pylori to SV5-infected Vero cells and treated with an anti-SV5 antibody was determined...
March 10, 2017: Medical Molecular Morphology
https://www.readbyqxmd.com/read/28278681/in-vitro-assessment-of-the-indirect-antioxidant-activity-of-sulforaphane-in-redox-imbalance-vanadium-induced
#19
Giuseppa Visalli, Alessio Facciolà, Maria Paola Bertuccio, Isa Picerno, Angela Di Pietro
Owing to sulforaphane presence, a dietary consumption of Brassicaceae prevents chronic diseases. This hormetic compound induces adaptive stress response at subtoxic doses, while doses that exceed the cellular defence are toxic. In HepG2, Caco-2 and Vero cells, we investigated the sulforaphane (SFN) (5 μM) role in counteracting redox imbalance induced by VOSO4 [V(IV)]. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) test showed a dose-dependent viability reduction (r < -0.95; p < 0...
February 8, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28277843/nanoethosomal-formulation-of-gammaoryzanol-for-skin-aging-protection-and-wrinkle-improvement-a-histopathological-study
#20
Saman Heydari, Saeed Ghanbarzadeh, Behzad Anoosh, Mohammad Reza Ranjkesh, Yousef Javadzadeh, Maryam Kouhsoltani, Hamed Hamishehkar
BACKGROUND: Free radical scavengers and antioxidants, with the main focus on enhanced targeting to the skin layers, can provide protection against skin ageing. OBJECTIVE: The aim of the present study was to prepare nanoethosomal formulation of Gammaoryzanol (GO), a water insoluble antioxidant, for its dermal delivery to prevent skin aging. METHODS: Nanoethosomal formulation was prepared by a modified ethanol injection method and characterized by using laser light scattering, scanning electronic microscope (SEM) and X-ray diffraction (XRD) techniques...
March 3, 2017: Drug Development and Industrial Pharmacy
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