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https://www.readbyqxmd.com/read/28441781/dengue-virus-non-structural-protein-5
#1
REVIEW
Abbas El Sahili, Julien Lescar
The World Health Organization estimates that the yearly number of dengue cases averages 390 million. This mosquito-borne virus disease is endemic in over 100 countries and will probably continue spreading, given the observed trend in global warming. So far, there is no antiviral drug available against dengue, but a vaccine has been recently marketed. Dengue virus also serves as a prototype for the study of other pathogenic flaviviruses that are emerging, like West Nile virus and Zika virus. Upon viral entry into the host cell and fusion of the viral lipid membrane with the endosomal membrane, the viral RNA is released and expressed as a polyprotein, that is then matured into three structural and seven non-structural (NS) proteins...
April 24, 2017: Viruses
https://www.readbyqxmd.com/read/28441779/glyoxalase-goes-green-the-expanding-roles-of-glyoxalase-in-plants
#2
REVIEW
Subramanian Sankaranarayanan, Muhammad Jamshed, Abhinandan Kumar, Logan Skori, Sabine Scandola, Tina Wang, David Spiegel, Marcus A Samuel
The ubiquitous glyoxalase enzymatic pathway is involved in the detoxification of methylglyoxal (MG), a cytotoxic byproduct of glycolysis. The glyoxalase system has been more extensively studied in animals versus plants. Plant glyoxalases have been primarily associated with stress responses and their overexpression is known to impart tolerance to various abiotic stresses. In plants, glyoxalases exist as multigene families, and new roles for glyoxalases in various developmental and signaling pathways have started to emerge...
April 24, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28441672/how-to-lead-the-way-through-complexity-constraint-and-uncertainty-in-academic-health-science-centers
#3
Susan J Lieff, Francis J Yammarino
Academic medicine is in an era of unprecedented and constant change due to fluctuating economies, globalization, emerging technologies, research, and professional and educational mandates. Consequently, academic health science centers (AHSCs) are facing new levels of complexity, constraint, and uncertainty. Currently, AHSC leaders work with competing academic and health service demands and are required to work with and are accountable to a diversity of stakeholders. Given the new challenges and emerging needs, the authors believe the leadership methods and approaches AHSCs have used in the past that led to successes will be insufficient...
May 2017: Academic Medicine: Journal of the Association of American Medical Colleges
https://www.readbyqxmd.com/read/28441586/kobuvirus-vp3-protein-restricts-the-ifn-%C3%AE-triggered-signaling-pathway-by-inhibiting-stat2-irf9-and-stat2-stat2-complex-formation
#4
Qianqian Peng, Xi Lan, Chen Wang, Yujie Ren, Ningning Yue, Junyong Wang, Bo Zhong, Qiyun Zhu
Emerged porcine kobuvirus (PKV) has adversely affected the global swine industry since 2008, but the etiological biology of PKV is unclear. Screening PKV-encoded structural and non-structural proteins with a type I IFN-responsive luciferase reporter showed that PKV VP3 protein inhibited the IFN-β-triggered signaling pathway, resulting in the decrease of VSV-GFP replication. QPCR data showed that IFN-β downstream cytokine genes were suppressed without cell-type specificity as well. The results from biochemical experiments indicated that PKV VP3 associated with STAT2 and IRF9, and interfered with the formation of the STAT2-IRF9 and STAT2-STAT2 complex, impairing nuclear translocation of STAT2 and IRF9...
April 22, 2017: Virology
https://www.readbyqxmd.com/read/28441545/targeted-mass-spectrometry-an-emerging-powerful-approach-to-unblock-the-bottleneck-in-phosphoproteomics
#5
REVIEW
Nerea Osinalde, Kerman Aloria, Miren J Omaetxebarria, Irina Kratchmarova
Following the rapid expansion of the proteomics field, the investigation of post translational modifications (PTM) has become extremely popular changing our perspective of how proteins constantly fine tune cellular functions. Reversible protein phosphorylation plays a pivotal role in virtually all biological processes in the cell and it is one the most characterized PTM up to date. During the last decade, the development of phosphoprotein/phosphopeptide enrichment strategies and mass spectrometry (MS) technology has revolutionized the field of phosphoproteomics discovering thousands of new site-specific phosphorylations and unveiling unprecedented evidence about their modulation under distinct cellular conditions...
April 17, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28441401/ancient-genes-establish-stress-induced-mutation-as-a-hallmark-of-cancer
#6
Luis Cisneros, Kimberly J Bussey, Adam J Orr, Milica Miočević, Charles H Lineweaver, Paul Davies
Cancer is sometimes depicted as a reversion to single cell behavior in cells adapted to live in a multicellular assembly. If this is the case, one would expect that mutation in cancer disrupts functional mechanisms that suppress cell-level traits detrimental to multicellularity. Such mechanisms should have evolved with or after the emergence of multicellularity. This leads to two related, but distinct hypotheses: 1) Somatic mutations in cancer will occur in genes that are younger than the emergence of multicellularity (1000 million years [MY]); and 2) genes that are frequently mutated in cancer and whose mutations are functionally important for the emergence of the cancer phenotype evolved within the past 1000 million years, and thus would exhibit an age distribution that is skewed to younger genes...
2017: PloS One
https://www.readbyqxmd.com/read/28441372/assessing-response-of-high-grade-gliomas-to-immune-checkpoint-inhibitors
#7
Solmaz Sahebjam, Dexter G Stallworth, Sepideh Mokhtari, Nam D Tran, John A Arrington
BACKGROUND: Immunotherapeutic agents, especially checkpoint inhibitors, have emerged as the mainstay of therapy for several solid and hematological malignancies. These therapies are under investigation for the treatment of high-grade gliomas and brain metastases. METHODS: This article reviews the unique challenges encountered when evaluating changes on magnetic resonance imaging (MRI) of glioblastomas seen in response to immunotherapy and checkpoint inhibitors and how to effectively incorporate MRI findings into the response assessment of high-grade gliomas to these emerging therapies...
April 2017: Cancer Control: Journal of the Moffitt Cancer Center
https://www.readbyqxmd.com/read/28441289/radiological-nuclear-human-monitoring-tabletop-exercise-recommendations-and-lessons-identified
#8
Vinita Chauhan, Devin Duncan, Ruth C Wilkins
Health Canada is the lead department for coordinating the federal response to a Canadian nuclear emergency event. The framework to manage a radiological consequence is outlined in the Federal Nuclear Emergency Plan (FNEP). In 2014, a full scale exercise (FSX) was held to test the capacity of the federal government to handle a nuclear facility emergency disaster in Canada. The FSX provided a means to demonstrate the integration of various departments and agencies in response to such an event, and although a number of task teams within FNEP were tested, the capacity to monitor humans for exposure post-event was not played out fully...
June 2017: Health Physics
https://www.readbyqxmd.com/read/28441287/lessons-learned-in-protection-of-the-public-for-the-accident-at-the-fukushima-daiichi-nuclear-power-plant
#9
Jessica Callen, Toshimitsu Homma
What insights can the accident at the Fukushima Daiichi nuclear power plant provide in the reality of decision making on actions to protect the public during a severe reactor and spent fuel pool emergency? In order to answer this question, and with the goal of limiting the consequences of any future emergencies at a nuclear power plant due to severe conditions, this paper presents the main actions taken in response to the emergency in the form of a timeline. The focus of this paper is those insights concerning the progression of an accident due to severe conditions at a light water reactor nuclear power plant that must be understood in order to protect the public...
June 2017: Health Physics
https://www.readbyqxmd.com/read/28441218/research-on-the-pa-profession-the-medical-model-shifts
#10
Richard W Dehn, Christine M Everett, Roderick S Hooker
Physician assistant (PA)-focused research arose in response to the idea that an assistant to the busy physician could improve healthcare delivery. The process of answering questions about the profession has involved multiple approaches and various scholarly disciplines. In the course of this undertaking, what emerged were three stages of examination of PA behavior. The bibliographic span from this period contains about 2,400 studies that advance some notion of PA benefit to society. On the 50th anniversary of the PA profession, a question arises as to what research has shown...
May 2017: JAAPA: Official Journal of the American Academy of Physician Assistants
https://www.readbyqxmd.com/read/28441138/employing-rna-viruses-to-fight-cancer-novel-insights-into-oncolytic-virotherapy
#11
Dörthe Masemann, Yvonne Boergeling, Stephan Ludwig
Within the last decades, viruses that specifically target tumor cells have emerged as novel therapeutic agents against cancer. These viruses do not only act via their cell-lytic properties, but also harbor immunostimulatory features to re-direct the tumor-microenvironment and stimulate tumor-directed immune responses. Furthermore, oncolytic viruses are considered to be superior to classical cancer therapies due to higher selectivity towards tumor cell destruction and, consequently, less collateral damage of non-transformed healthy tissue...
April 25, 2017: Biological Chemistry
https://www.readbyqxmd.com/read/28440747/an-emergency-brake-for-protein-synthesis
#12
Vladislava Hronová, Leoš Shivaya Valášek
The integrated stress response is able to rapidly shut down the synthesis of proteins in eukaryotic cells.
April 25, 2017: ELife
https://www.readbyqxmd.com/read/28440550/political-drivers-of-epidemic-response-foreign-healthcare-workers-and-the-2014-ebola-outbreak
#13
Daniel Nohrstedt, Erik Baekkeskov
This study demonstrates that countries responded quite differently to calls for healthcare workers (HCWs) during the Ebola epidemic in West Africa in 2014. Using a new dataset on the scale and timing of national pledges and the deployment of HCWs to states experiencing outbreaks of the virus disease (principally, Guinea, Liberia, and Sierra Leone), it shows that few foreign nations deployed HCWs early, some made pledges but then fulfilled them slowly, and most sent no HCWs at all. To aid understanding of such national responses, the paper reviews five theoretical perspectives that offer potentially competing or complementary explanations of foreign government medical assistance for international public health emergencies...
April 25, 2017: Disasters
https://www.readbyqxmd.com/read/28440546/stem-cell-dynamics-in-muscle-regeneration-insights-from-live-imaging-in-different-animal-models
#14
REVIEW
Dhanushika Ratnayake, Peter D Currie
In recent years, live imaging has been adopted to study stem cells in their native environment at cellular resolution. In the skeletal muscle field, this has led to visualising the initial events of muscle repair in mouse, and the entire regenerative response in zebrafish. Here, we review recent discoveries in this field obtained from live imaging studies. Tracking of tissue resident stem cells, the satellite cells, following injury has captured the morphogenetic dynamics of stem/progenitor cells as they facilitate repair...
April 25, 2017: BioEssays: News and Reviews in Molecular, Cellular and Developmental Biology
https://www.readbyqxmd.com/read/28440427/downregulation-of-mir-200c-protects-cardiomyocytes-from-hypoxia-induced-apoptosis-by-targeting-gata-4
#15
Zhigang Chen, Shaoli Zhang, Changlei Guo, Jianhua Li, Wenfeng Sang
Hypoxia-induced cardiomyocyte apoptosis plays an important role in the development of ischemic heart disease. MicroRNAs (miRNAs or miRs) are emerging as critical regulators of hypoxia-induced cardiomyocyte apoptosis. miR-200c is an miRNA that has been reported to be related to apoptosis in various pathological processes; however, its role in hypoxia‑induced cardiomyocyte apoptosis remains unclear. In the present study, we aimed to investigate the potential role and underlying mechanism of miR-200c in regulating hypoxia‑induced cardiomyocyte apoptosis...
April 20, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28440091/microbial-exopolysaccharide-mediated-synthesis-and-stabilization-of-metal-nanoparticles
#16
Ganesan Sathiyanarayanan, Krishnamoorthy Dineshkumar, Yung-Hun Yang
Exopolysaccharides (EPSs) are structurally and functionally valuable biopolymer secreted by different prokaryotic and eukaryotic microorganisms in response to biotic/abiotic stresses and to survive in extreme environments. Microbial EPSs are fascinating in various industrial sectors due to their excellent material properties and less toxic, highly biodegradable, and biocompatible nature. Recently, microbial EPSs have been used as a potential template for the rapid synthesis of metallic nanoparticles and EPS-mediated metal reduction processes are emerging as simple, harmless, and environmentally benign green chemistry approaches...
April 25, 2017: Critical Reviews in Microbiology
https://www.readbyqxmd.com/read/28439299/substance-p-enhances-lactic-acid-and-tyramine-production-in-enterococcus-faecalis-v583-and-promotes-its-cytotoxic-effect-on-intestinal-caco-2-tc7-cells
#17
Kelly Biaggini, Valérie Borrel, Sabine Szunerits, Rabah Boukherroub, Awa N'Diaye, Arthur Zébré, Maryse Bonnin-Jusserand, Guillaume Duflos, Marc Feuilloley, Djamel Drider, Pierre Déchelotte, Nathalie Connil
BACKGROUND: Enterococcus faecalis, generally considered as a saprophytic bowel commensal, has recently emerged as an important nosocomial pathogen causing severe urinary tract infections, surgical wound infections, bacteremia, and bacterial endocarditis. This bacterium is capable of forming biofilms on various surfaces and its high level of antibiotic resistance contributes to its pathogenicity. The aim of this study was to evaluate the effect on E. faecalis, of Substance P (SP), an antimicrobial peptide that is produced in the gut and skin...
2017: Gut Pathogens
https://www.readbyqxmd.com/read/28439266/a-novel-regulator-of-activation-induced-cytidine-deaminase-apobecs-in-immunity-and-cancer-schr%C3%A3-dinger-s-catalytic-pocket
#18
REVIEW
Justin J King, Mani Larijani
Activation-induced cytidine deaminase (AID) and its relative APOBEC3 cytidine deaminases boost immune response by mutating immune or viral genes. Because of their genome-mutating activities, AID/APOBECs are also drivers of tumorigenesis. Due to highly charged surfaces, extensive non-specific protein-protein/nucleic acid interactions, formation of polydisperse oligomers, and general insolubility, structure elucidation of these proteins by X-ray crystallography and NMR has been challenging. Hence, almost all available AID/APOBEC structures are of mutated and/or truncated versions...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28438975/galectin-3-is-a-target-for-proteases-involved-in-the-virulence-of-staphylococcus-aureus
#19
Jonas Elmwall, Jakub Kwiecinski, Manli Na, Abukar Ahmed Ali, Veronica Osla, Lindsey Shaw, Wanzhong Wang, Karin Sävman, Elisabet Josefsson, Johan Bylund, Tao Jin, Amanda Welin, Anna Karlsson
Staphylococcus aureus is a major cause of skin and soft-tissue infection. The bacterium expresses four major proteases emerging as virulence factors; aureolysin (Aur), V8 protease (SspA), staphopain A (ScpA), and staphopain B (SspB). We hypothesized that human galectin-3, a β-galactoside-binding lectin involved in immune regulation and antimicrobial defense, is a target for these proteases, and that proteolysis of galectin-3 is a novel immune evasion mechanism. Indeed, supernatants from laboratory strains and clinical isolates of S...
April 24, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28438969/intracellular-in-vivo-dynamics-of-thalamocortical-synapses-in-visual-cortex
#20
Madineh Sedigh-Sarvestani, Leif Vigeland, Ivan Fernandez-Lamo, Morgan Taylor, Larry A Palmer, Diego Contreras
Seminal studies of the thalamocortical (TC) circuit in the visual system of the cat have been central to our understanding of sensory encoding. However, TC synaptic properties remain poorly understood. We used paired recordings, in the lateral geniculate nucleus (LGN) and primary visual cortex (V1), to provide the first in vivo characterization of sensory-driven TC potentials in V1. The amplitudes of EPSPs we characterized were smaller than those previously reported in vitro. Consistent with prior findings, connected LGN-V1 pairs were only found when their receptive fields (RFs) overlapped, and the probability of connection increased steeply with degree of RF overlap and response similarity...
April 24, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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