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https://www.readbyqxmd.com/read/27926941/type-1-interferons-and-nk-cells-limit-murine-cytomegalovirus-escape-from-the-lymph-node-subcapsular-sinus
#1
Helen E Farrell, Kimberley Bruce, Clara Lawler, Rhonda D Cardin, Nicholas J Davis-Poynter, Philip G Stevenson
Cytomegaloviruses (CMVs) establish chronic, systemic infections. Peripheral infection spreads via lymph nodes, which are also a focus of host defence. Thus, this is a point at which systemic infection spread might be restricted. Subcapsular sinus macrophages (SSM) captured murine CMV (MCMV) from the afferent lymph and poorly supported its replication. Blocking the type I interferon (IFN-I) receptor (IFNAR) increased MCMV infection of SSM and of the fibroblastic reticular cells (FRC) lining the subcapsular sinus, and accelerated viral spread to the spleen...
December 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27926545/immune-responses-to-bioengineered-organs
#2
Jordi Ochando, Dominique Charron, Pedro M Baptista, Basak E Uygun
PURPOSE OF REVIEW: Organ donation in the United States registered 9079 deceased organ donors in 2015. This high percentage of donations allowed organ transplantation in 29 851 recipients. Despite increasing numbers of transplants performed in comparison with previous years, the numbers of patients that are in need for a transplant increase every year at a higher rate. This reveals that the discrepancy between the demand and availability of organs remains fundamental problem in organ transplantation...
December 6, 2016: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/27924857/electrohydrodynamic-assisted-assembly-of-hierarchically-structured-3d-crumpled-nanostructures-for-efficient-solar-conversions
#3
Hidetaka Ishihara, Yen-Chang Chen, Nicholas De Marco, Oliver Lin, Chih-Meng Huang, Vipawee Limsakoune, Yi-Chia Chou, Yang Yang, Vincent Tung
The tantalizing prospect of harnessing the unique properties of graphene crumpled nanostructures continues to fuel tremendous interest in energy storage and harvesting applications. However, the paper ball-like, hard texture, and closed-sphere morphology of current 3D graphitic nanostructure production not only constricts the conductive pathways but also limits the accessible surface area. Here, we report new insights into electrohydrodynamically-generated droplets as colloidal nanoreactors in that the stimuli-responsive nature of reduced graphene oxide can lead to the formation of crumpled nanostructures with a combination of open structures and doubly curved, saddle-shaped edges...
December 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27924049/early-trajectory-of-stroke-severity-predicts-long-term-functional-outcomes-in-ischemic-stroke-subjects-results-from-the-escape-trial-endovascular-treatment-for-small-core-and-anterior-circulation-proximal-occlusion-with-emphasis-on-minimizing-ct-to-recanalization
#4
Tolulope T Sajobi, Bijoy K Menon, Meng Wang, Oluwaseyi Lawal, Ashfaq Shuaib, David Williams, Alexandre Y Poppe, Tudor G Jovin, Leanne K Casaubon, Thomas Devlin, Dar Dowlatshahi, Chris Fanale, Mark W Lowerison, Andrew M Demchuk, Mayank Goyal, Michael D Hill
BACKGROUND AND PURPOSE: The trajectory of neurological improvement after stroke treatment is clinically likely to be an important prognostic signal. We compared the accuracy of early longitudinal National Institutes of Health Stroke Scale (NIHSS) measurement versus other early markers of stroke severity post treatment in predicting subjects' 90-day stroke outcome. METHODS: Data are from the Endovascular treatment for Small Core and Anterior circulation Proximal occlusion with ESCAPE trial (Endovascular Treatment for Small Core and Anterior Circulation Proximal Occlusion With Emphasis on Minimizing CT to Recanalization Times)...
December 6, 2016: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/27923812/an-l-to-d-amino-acid-conversion-in-the-cell-penetrating-peptide-dftat-influences-proteolytic-stability-endocytic-uptake-and-endosomal-escape
#5
Kristina Najjar, Alfredo Erazo-Oliveras, Dakota J Brock, Ting-Yi Wang, Jean-Philippe Pellois
Cell-penetrating peptides (CPPs) are well established as delivery agents for otherwise cell-impermeable cargos. CPPs can also theoretically be used to modulate intracellular processes. However, their susceptibility to proteolytic degradation often limits their utility in these applications. Previous studies have explored the consequences on cellular uptake of converting the residues in CPPs from L to D stereochemistry, but conflicting results have been reported and specific steps en route to intracellular activity have not been explored...
December 6, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27923709/digesta-retention-patterns-in-geese-anser-anser-and-turkeys-meleagris-gallopavo-and-deduced-function-of-avian-caeca
#6
Samuel Frei, Sylvia Ortmann, Michael Kreuzer, Jean-Michel Hatt, Marcus Clauss
Although it is well-known that retrograde transport of urine fills the caeca of birds with fluid and small particles, the function of avian caeca is still not fully understood. We measured mean retention times (MRT) of solute (cobalt-EDTA, Co), small particle (<2mm, chromium-mordanted fibre, Cr) and large particle (8mm, cerium-marked fibre, Ce) markers in geese (Anser anser) and turkeys (Meleagris gallopavo) fed alfalfa pellets ad libitum. Intake did not differ between species. Turkeys had longer MRT for all markers (Co: 10...
December 3, 2016: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/27923635/novel-application-of-a-radial-water-tread-maze-can-distinguish-cognitive-deficits-in-mice-with-traumatic-brain-injury
#7
Marcella M Cline, Josh Yumul, Lisa Hysa, Dalia Murra, Gregory G Garwin, David G Cook, Warren Ladiges, Satoshi Minoshima, Donna J Cross
INTRODUCTION: The use of forced-swim, rat-validated cognition tests in mouse models of Traumatic Brain Injury (TBI) raises methodological concerns; such models are vulnerable to a number of confounding factors including impaired motor function and stress-induced non-compliance (failure to swim). This study evaluated the ability of a Radial Water Tread (RWT) maze, designed specifically for mice, that requires no swimming to distinguish mice with controlled cortical impact (CCI) induced TBI and Sham controls...
December 3, 2016: Brain Research
https://www.readbyqxmd.com/read/27923389/the-importance-of-albumin-infusion-rate-for-plasma-volume-expansion-following-major-abdominal-surgery-air-study-protocol-for-a-randomised-controlled-trial
#8
Svajunas Statkevicius, Johan Bonnevier, Björn P Bark, Erik Larsson, Carl M Öberg, Päivi Kannisto, Bobby Tingstedt, Peter Bentzer
BACKGROUND: Administration of fluids to restore normovolaemia is one of the most common therapeutic interventions performed peri-operatively and in the critically ill, but no study has evaluated the importance of infusion rate for the plasma volume-expanding effect of a resuscitation fluid. The present study is designed to test the hypothesis that a slow infusion of resuscitation fluid results in better plasma volume expansion than a rapid infusion. METHODS/DESIGN: The study is a single-centre, assessor-blinded, parallel-group, randomised prospective study...
December 7, 2016: Trials
https://www.readbyqxmd.com/read/27922668/dual-inhibition-using-cabozantinib-overcomes-hgf-met-signaling-mediated-resistance-to-pan-vegfr-inhibition-in-orthotopic-and-metastatic-neuroblastoma-tumors
#9
Estelle Daudigeos-Dubus, Ludivine Le Dret, Olivia Bawa, Paule Opolon, Albane Vievard, Irène Villa, Jacques Bosq, Gilles Vassal, Birgit Geoerger
MET is expressed on neuroblastoma cells and may trigger tumor growth, neoangiogenesis and metastasis. MET upregulation further represents an escape mechanism to various anticancer treatments including VEGF signaling inhibitors. We developed in vitro a resistance model to pan-VEGFR inhibition and explored the simultaneous inhibition of VEGFR and MET in neuroblastoma models in vitro and in vivo using cabozantinib, an inhibitor of the tyrosine kinases including VEGFR2, MET, AXL and RET. Resistance in IGR-N91-Luc neuroblastoma cells under continuous in vitro exposure pressure to VEGFR1-3 inhibition using axitinib was associated with HGF and p-ERK overexpression...
December 6, 2016: International Journal of Oncology
https://www.readbyqxmd.com/read/27922182/retinoid-derivative-tp80-exhibits-anti-hepatitis-c-virus-activity-through-restoration-of-gi-gpx-expression
#10
Nguyen Bao Ngoc, Yukiko Okuno, Masahiko Ajiro, Kei Iida, Masatsugu Denawa, Makoto Yamamoto, Naoya Sakamoto, Hiroyuki Kagechika, Masatoshi Hagiwara
Hepatitis C virus (HCV) is a positive-sense single-stranded RNA virus with an estimated infection in ∼180 million people worldwide, and its chronic infection leads to development of cirrhosis and hepatocellular carcinoma. Although recent development of direct acting antiviral (DAA) compounds improved anti-HCV regimens, alternative therapeutic compounds are still demanded due to an expected emergence of escape mutants for those DAAs. In order to identify novel anti-HCV agents, we conducted chemical library screening for 2,086 compounds using HCV Rep-Feo reporter replicon in Huh7 hepatoma cells...
December 6, 2016: Journal of Medical Virology
https://www.readbyqxmd.com/read/27921011/mechanisms-of-infectivity-and-evasion-derived-from-microvesicles-cargo-produced-by-trypanosoma-cruzi
#11
REVIEW
Bruna C Borges, Isadora A Uehara, Laysa O S Dias, Paula C Brígido, Claudio V da Silva, Marcelo J B Silva
Cell invasion by the intracellular protozoans requires interaction of proteins from both the host and the parasite. Many parasites establish chronic infections, showing they have the potential to escape the immune system; for example, Trypanosoma cruzi is an intracellular parasite that causes Chagas disease. Parasite internalization into host cell requires secreted and surface molecules, such as microvesicles. The release of microvesicles and other vesicles, such as exosomes, by different eukaryotic organisms was first observed in the late twentieth century...
2016: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/27921009/adhesion-and-invasion-of-gastric-mucosa-epithelial-cells-by-helicobacter-pylori
#12
REVIEW
Ying Huang, Qi-Long Wang, Dan-Dan Cheng, Wen-Ting Xu, Nong-Hua Lu
Helicobacter pylori is the main pathogenic bacterium involved in chronic gastritis and peptic ulcer and a class 1 carcinogen in gastric cancer. Current research focuses on the pathogenicity of H. pylori and the mechanism by which it colonizes the gastric mucosa. An increasing number of in vivo and in vitro studies demonstrate that H. pylori can invade and proliferate in epithelial cells, suggesting that this process might play an important role in disease induction, immune escape and chronic infection. Therefore, to explore the process and mechanism of adhesion and invasion of gastric mucosa epithelial cells by H...
2016: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/27920856/tongue-base-schwannoma-differential-diagnosis-and-imaging-features-with-a-case-presentation
#13
Zain Badar, Zerwa Farooq, Daniel Zaccarini, Sajeev R Ezhapilli
Schwannomas are slow growing, encapsulated neoplasms that arise from the nerve sheath. A vast majority of these benign neoplasms occur in the head and neck region, most commonly involving the 8th cranial nerve. Schwannomas arising from the base of tongue are very rare and, thus, can easily escape the list of differential diagnosis for a posterior tongue mass. A systematic approach is recommended for diagnosis of a posterior tongue mass, with neoplastic, infectious, and congenital categories. We report a case of a 24-year-old female, who presented with pressure sensation in the throat...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27920775/human-papillomavirus-downregulates-the-expression-of-ifitm1-and-ripk3-to-escape-from-ifn%C3%AE-and-tnf%C3%AE-mediated-antiproliferative-effects-and-necroptosis
#14
Wenbo Ma, Bart Tummers, Edith M G van Esch, Renske Goedemans, Cornelis J M Melief, Craig Meyers, Judith M Boer, Sjoerd H van der Burg
The clearance of a high-risk human papillomavirus (hrHPV) infection takes time and requires the local presence of a strong type 1 cytokine T cell response, suggesting that hrHPV has evolved mechanisms to resist this immune attack. Using an unique system for non, newly, and persistent hrHPV infection, we show that hrHPV infection renders keratinocytes (KCs) resistant to the antiproliferative- and necroptosis-inducing effects of IFNγ and TNFα. HrHPV-impaired necroptosis was associated with the upregulation of several methyltransferases, including EZH2, and the downregulation of RIPK3 expression...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27920531/in-vitro-evaluation-of-folic-acid-conjugated-redox-responsive-mesoporous-silica-nanoparticles-for-the-delivery-of-cisplatin
#15
Merlis P Alvarez-Berríos, Juan L Vivero-Escoto
The use of cisplatin(IV) prodrugs for the delivery of cisplatin have gained significant attention, because of their low toxicity and reactivity. Recent studies have shown that targeted cisplatin(IV)-prodrug nanoparticle-based delivery systems can improve the internalization of the cisplatin(IV) prodrug. We hypothesized that folic acid-conjugated mesoporous silica nanoparticles (MSNs) containing cisplatin(IV) prodrug could target cancer cells that overexpress the folate receptor and deliver the active cisplatin drug upon intracellular reduction...
2016: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/27920297/role-of-ribonucleotide-reductase-on-bacillus-subtilis-stress-associated-mutagenesis
#16
Karla Viridiana Castro-Cerritos, Ronald E Yasbin, Eduardo A Robleto, Mario Pedraza-Reyes
: The Gram-positive microorganism Bacillus subtilis relies on a single class Ib ribonucleotide reductase (RNR) to generate 2' -deoxyribonucleotides (dNDPs) for DNA replication and repair. In this work, we investigated the influence of RNR levels on B. subtilis stationary-phase-associated mutagenesis (SPM). Since RNR is essential in this bacterium, we engineered a conditional mutant in the strain B. subtilis YB955 (hisC952, metB5, leu427) in which expression of the nrdEF operon was modulated by isopropyl-β-D-thiogalactopyranoside (IPTG)...
December 5, 2016: Journal of Bacteriology
https://www.readbyqxmd.com/read/27919695/metabolomics-identifies-perturbations-in-amino-acid-metabolism-in-the-prefrontal-cortex-of-the-learned-helplessness-rat-model-of-depression
#17
Xinyu Zhou, Lanxiang Liu, Yuqing Zhang, Juncai Pu, Lining Yang, Chanjuan Zhou, Shuai Yuan, Hanping Zhang, Peng Xie
Major depressive disorder is a serious psychiatric condition associated with high rates of suicide and is a leading cause of health burden worldwide. However, the underlying molecular mechanisms of major depression are still essentially unclear. In our study, a non-targeted gas chromatography-mass spectrometry-based metabolomics approach was used to investigate metabolic changes in the prefrontal cortex of the learned helplessness rat model of depression. Body-weight measurements and behavioral tests including the active escape test, sucrose preference test, forced swimming test, elevated plus-maze and open field test were used to assess changes in the behavioral spectrum after inescapable footshock stress...
December 2, 2016: Neuroscience
https://www.readbyqxmd.com/read/27919443/importance-of-endogenous-compensatory-vasoactive-peptides-in-broadening-the-effects-of-inhibitors-of-the-renin-angiotensin-system-for-the-treatment-of-heart-failure
#18
REVIEW
Milton Packer, John J V McMurray
The magnitude of the clinical benefits produced by inhibitors of the renin-angiotensin system in heart failure has been modest, possibly because of the ability of renin-angiotensin activity to escape from suppression during long-term treatment. Efforts to intensify pharmacological blockade by use of dual inhibitors that interfere with the renin-angiotensin system at multiple sites have not yielded consistent incremental clinical benefits, but have been associated with serious adverse reactions. By contrast, potentiation of endogenous compensatory vasoactive peptides can act to enhance the survival effects of inhibitors of the renin-angiotensin system, as evidenced by trials that have compared angiotensin-converting enzyme inhibitors with drugs that inhibit both the renin-angiotensin system and neprilysin...
December 2, 2016: Lancet
https://www.readbyqxmd.com/read/27918890/differential-expression-on-mitochondrial-tryparedoxin-peroxidase-mtctxnpx-in-trypanosoma-cruzi-after-ferrocenyl-diamine-hydrochlorides-treatments
#19
Andréa A N Kohatsu, Flávia A J Silva, Acácio I Francisco, Aline Rimoldi, Marco T A Silva, Maria D Vargas, João A da Rosa, Regina M B Cicarelli
Resistance to benznidazole in certain strains of Trypanosoma cruzi may be caused by the increased production of enzymes that act on the oxidative metabolism, such as mitochondrial tryparedoxin peroxidase (mTcTXNPx) which catalyses the reduction of peroxides. This work presents cytotoxicity assays performed with ferrocenyl diamine hydrochlorides in six different strains of T. cruzi epimastigote forms (Y, Bolivia, SI1, SI8, QMII, and SIGR3). The last four strains have been recently isolated from triatominae and mammalian host (domestic cat)...
December 2, 2016: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27918572/risk-of-hiv-escape-using-sub-optimal-antiretroviral-dual-or-monotherapy
#20
Carmen de Mendoza
Budget constrictions have pushed some researchers to explore whether antiretroviral therapy with one or two drugs instead of the well-established triple-drug regimens may be able to maintain undetectable viremia in HIV-infected individuals, at least used as simplification in patients already with viral suppression under standard triple therapy. With the advent of co-formulations and the improved safety of the newest antiretroviral agents, there is no other reason than cost to justify moving from triple to dual or monotherapy...
October 2016: AIDS Reviews
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