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https://www.readbyqxmd.com/read/28446585/activation-mechanism-of-a-neuromodulator-gated-pacemaker-ionic-current
#1
Michael Gray, Daniel Hector Daudelin, Jorge Golowasch
The neuromodulator-gated current (IMI) found in the crab stomatogastric ganglion is activated by neuromodulators that are essential to induce the rhythmic activity of the pyloric network in this system. One of these neuromodulators is also known to control the correlated expression of voltage-gated ionic currents in pyloric neurons as well as synaptic plasticity and strength. Thus, understanding the mechanism by which neuromodulator receptors activate IMI should provide insights not only into how oscillations are initiated, but also into how other processes, and currents not directly activated by them, are regulated...
April 26, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28445835/economic-consequences-of-legal-and-illegal-drugs-the-case-of-social-costs-in-belgium
#2
Delfine Lievens, Freya Vander Laenen, Nick Verhaeghe, Koen Putman, Lieven Pauwels, Wim Hardyns, Lieven Annemans
BACKGROUND: Legal and illegal drugs impose a considerable burden to the individual and to society. The misuse of addictive substances results in healthcare and law enforcement costs, loss of productivity and reduced quality of life. METHODS: A social cost study was conducted to estimate the substance-attributable costs of alcohol, tobacco, illegal drugs and psychoactive medication to Belgian society in 2012. The cost-of-illness framework with prevalence-based and human capital approach was applied...
April 23, 2017: International Journal on Drug Policy
https://www.readbyqxmd.com/read/28444463/cost-effectiveness-of-craniotomy-for-epidural-hematomas-at-a-major-government-hospital-in-cambodia
#3
Dane Moran, Mark G Shrime, Sam Nang, Iv Vycheth, Din Vuthy, Raksmey Hong, William V Padula, Kee B Park
BACKGROUND: Epidural hematoma (EDH) is a common and potentially deadly occurrence following a severe traumatic brain injury. Our aim was to determine whether craniotomy is cost-effective when indicated for the treatment of EDH when a trained neurosurgeon is available. METHODS: A decision tree was used to model the cost-effectiveness of craniotomy available versus craniotomy unavailable for the management of traumatic EDH from a Cambodian societal and provider perspective...
April 25, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28443208/roles-of-rap1-signaling-in-tumor-cell-migration-and-invasion
#4
Yi-Lei Zhang, Ruo-Chen Wang, Ken Cheng, Brian Z Ring, Li Su
Ras-associated protein-1 (Rap1), a small GTPase in the Ras-related protein family, is an important regulator of basic cellular functions (e.g., formation and control of cell adhesions and junctions), cellular migration, and polarization. Through its interaction with other proteins, Rap1 plays many roles during cell invasion and metastasis in different cancers. The basic function of Rap1 is straightforward; it acts as a switch during cellular signaling transduction and regulated by its binding to either guanosine triphosphate (GTP) or guanosine diphosphate (GDP)...
February 2017: Cancer Biology & Medicine
https://www.readbyqxmd.com/read/28441734/chloroviruses-have-a-sweet-tooth
#5
REVIEW
James L Van Etten, Irina Agarkova, David D Dunigan, Michela Tonetti, Christina De Castro, Garry A Duncan
Chloroviruses are large double-stranded DNA (dsDNA) viruses that infect certain isolates of chlorella-like green algae. They contain up to approximately 400 protein-encoding genes and 16 transfer RNA (tRNA) genes. This review summarizes the unexpected finding that many of the chlorovirus genes encode proteins involved in manipulating carbohydrates. These include enzymes involved in making extracellular polysaccharides, such as hyaluronan and chitin, enzymes that make nucleotide sugars, such as GDP-L-fucose and GDP-D-rhamnose and enzymes involved in the synthesis of glycans attached to the virus major capsid proteins...
April 22, 2017: Viruses
https://www.readbyqxmd.com/read/28438999/deciphering-the-sugar-biosynthetic-pathway-and-tailoring-steps-of-nucleoside-antibiotic-a201a-unveils-a-gdp-l-galactose-mutase
#6
Qinghua Zhu, Qi Chen, Yongxiang Song, Hongbo Huang, Jun Li, Junying Ma, Qinglian Li, Jianhua Ju
Galactose, a monosaccharide capable of assuming two possible configurational isomers (d-/l-), can exist as a six-membered ring, galactopyranose (Galp), or as a five-membered ring, galactofuranose (Galf). UDP-galactopyranose mutase (UGM) mediates the conversion of pyranose to furanose thereby providing a precursor for d-Galf Moreover, UGM is critical to the virulence of numerous eukaryotic and prokaryotic human pathogens and thus represents an excellent antimicrobial drug target. However, the biosynthetic mechanism and relevant enzymes that drive l-Galf production have not yet been characterized...
April 24, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28438988/the-fading-american-dream-trends-in-absolute-income-mobility-since-1940
#7
Raj Chetty, David Grusky, Maximilian Hell, Nathaniel Hendren, Robert Manduca, Jimmy Narang
We estimated rates of "absolute income mobility"-the fraction of children who earn more than their parents-by combining data from U.S. Census and Current Population Survey cross sections with panel data from de-identified tax records. We found that rates of absolute mobility have fallen from approximately 90% for children born in 1940 to 50% for children born in the 1980s. Increasing GDP growth rates alone cannot restore absolute mobility to the rates experienced by children born in the 1940s. However, distributing current GDP growth more equally across income groups as in the 1940 birth cohort would reverse more than 70% of the decline in mobility...
April 24, 2017: Science
https://www.readbyqxmd.com/read/28438432/the-weight-of-unfinished-plate-a-survey-based-characterization-of-restaurant-food-waste-in-chinese-cities
#8
Ling-En Wang, Gang Liu, Xiaojie Liu, Yao Liu, Jun Gao, Bin Zhou, Si Gao, Shengkui Cheng
Consumer food waste has attracted increasing public, academic, and political attention in recent years, due to its adverse resource, environmental, and socioeconomic impacts. The scales and patterns of consumer food waste, especially in developing countries, however, remain poorly understood, which may hinder the global effort of reducing food waste. In this study, based on a direct weighing method and a survey of 3557 tables in 195 restaurants in four case cities, we investigated the amount and patterns of restaurant food waste in China in 2015...
April 21, 2017: Waste Management
https://www.readbyqxmd.com/read/28435669/reframing-the-science-and-policy-of-nicotine-illegal-drugs-and-alcohol-conclusions-of-the-alice-rap-project
#9
Peter Anderson, Virginia Berridge, Patricia Conrod, Robert Dudley, Matilda Hellman, Dirk Lachenmeier, Anne Lingford-Hughes, David Miller, Jürgen Rehm, Robin Room, Laura Schmidt, Roger Sullivan, Tamyko Ysa, Antoni Gual
In 2013, illegal drug use was responsible for 1.8% of years of life lost in the European Union, alcohol was responsible for 8.2% and tobacco for 18.2%, imposing economic burdens in excess of 2.5% of GDP. No single European country has optimal governance structures for reducing the harm done by nicotine, illegal drugs and alcohol, and existing ones are poorly designed, fragmented, and sometimes cause harm. Reporting the main science and policy conclusions of a transdisciplinary five-year analysis of the place of addictions in Europe, researchers from 67 scientific institutions addressed these problems by reframing an understanding of addictions...
2017: F1000Research
https://www.readbyqxmd.com/read/28433260/future-and-potential-spending-on-health-2015-40-development-assistance-for-health-and-government-prepaid-private-and-out-of-pocket-health-spending-in-184-countries
#10
(no author information available yet)
BACKGROUND: The amount of resources, particularly prepaid resources, available for health can affect access to health care and health outcomes. Although health spending tends to increase with economic development, tremendous variation exists among health financing systems. Estimates of future spending can be beneficial for policy makers and planners, and can identify financing gaps. In this study, we estimate future gross domestic product (GDP), all-sector government spending, and health spending disaggregated by source, and we compare expected future spending to potential future spending...
April 19, 2017: Lancet
https://www.readbyqxmd.com/read/28431347/improving-water-quality-in-china-environmental-investment-pays-dividends
#11
Yongqiang Zhou, Jianrong Ma, Yunlin Zhang, Boqiang Qin, Erik Jeppesen, Kun Shi, Justin D Brookes, Robert G M Spencer, Guangwei Zhu, Guang Gao
This study highlights how Chinese economic development detrimentally impacted water quality in recent decades and how this has been improved by enormous investment in environmental remediation funded by the Chinese government. To our knowledge, this study is the first to describe the variability of surface water quality in inland waters in China, the affecting drivers behind the changes, and how the government-financed conservation actions have impacted water quality. Water quality was found to be poorest in the North and the Northeast China Plain where there is greater coverage of developed land (cities + cropland), a higher gross domestic product (GDP), and higher population density...
April 14, 2017: Water Research
https://www.readbyqxmd.com/read/28430973/biological-functions-of-fucose-in-mammals
#12
Michael Schneider, Esam Al-Shareffi, Robert S Haltiwanger
Fucose is a 6-deoxy hexose in the L-configuration found in a large variety of different organisms. In mammals, fucose is incorporated into N-glycans, O-glycans and glycolipids by thirteen fucosyltransferases, all of which utilize the nucleotide charged form, GDP-fucose, to modify targets. Three of the fucosyltransferases, FUT8, FUT12/POFUT1, and FUT13/POFUT2, are essential for proper development in mice. Fucose modifications have also been implicated in many other biological functions including immunity and cancer...
April 18, 2017: Glycobiology
https://www.readbyqxmd.com/read/28428259/rabl2-interacts-with-the-ift-b-complex-and-cep19-and-participates-in-ciliary-assembly
#13
Yuya Nishijima, Yohei Hagiya, Tomohiro Kubo, Ryota Takei, Yohei Katoh, Kazuhisa Nakayama
Proteins localized to the basal body and the centrosome play crucial roles in ciliary assembly and functions. Although RABL2 and CEP19 are conserved in ciliated organisms and have been implicated in ciliary/flagellar functions, their roles were poorly understood. We here showed that RABL2 interacts with CEP19 and is recruited to the mother centriole and basal body in a CEP19-dependent manner, and that CEP19 is recruited to the centriole probably via its binding to the centrosomal protein FGFR1OP. Disruption of the RABL2 gene in Chlamydomonas reinhardtii resulted in the non-flagellated phenotype, suggesting a crucial role of RABL2 in ciliary/flagellar assembly...
April 20, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28426288/post-translational-modifications-of-rab-gtpases
#14
Swapnil Rohidas Shinde, Subbareddy Maddika
Rab GTPases, the highly conserved members of Ras GTPase superfamily are central players in the vesicular trafficking. They are critically involved in intracellular trafficking pathway, beginning from formation of vesicles on donor membranes, defining trafficking specificity to facilitating vesicle docking on target membranes. Given the dynamic roles of Rabs during different stages of vesicular trafficking, mechanisms for their spatial and temporal regulation are crucial for normal cellular function. Regulation of Rab GTPase activity, localization and function has always been focused in and around the association of GDP dissociation inhibitor (GDI), Guanine nucleotide Exchange Factor (GEFs) and GTPase accelerating protein (GAP) to Rabs...
February 28, 2017: Small GTPases
https://www.readbyqxmd.com/read/28424218/gop-1-promotes-apoptotic-cell-degradation-by-activating-the-small-gtpase-rab2-in-c-elegans
#15
Jianhua Yin, Yaling Huang, Pengfei Guo, Siqi Hu, Sawako Yoshina, Nan Xuan, Qiwen Gan, Shohei Mitani, Chonglin Yang, Xiaochen Wang
Apoptotic cells generated by programmed cell death are engulfed by phagocytes and enclosed within plasma membrane-derived phagosomes. Maturation of phagosomes involves a series of membrane-remodeling events that are governed by the sequential actions of Rab GTPases and lead to formation of phagolysosomes, where cell corpses are degraded. Here we identified gop-1 as a novel regulator of apoptotic cell clearance in Caenorhabditis elegans Loss of gop-1 affects phagosome maturation through the RAB-5-positive stage, causing defects in phagosome acidification and phagolysosome formation, phenotypes identical to and unaffected by loss of unc-108, the C...
April 19, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28420712/sec71-functions-as-a-gef-for-the-small-gtpase-arf1-to-govern-dendrite-pruning-of-drosophila-sensory-neurons
#16
Yan Wang, Heng Zhang, Meng Shi, Yih-Cherng Liou, Lei Lu, Fengwei Yu
Pruning, whereby neurons eliminate their exuberant neurites, is central for the maturation of the nervous system. In Drosophila, sensory neurons, ddaCs, selectively prune their larval dendrites without affecting their axons during metamorphosis. However, it is unknown whether the secretory pathway plays a role in dendrite pruning. Here, we show that the small GTPase Arf1, an important regulator of secretory pathway, is specifically required for dendrite pruning of ddaC/D/E sensory neurons but dispensable for apoptosis of ddaF neurons...
April 18, 2017: Development
https://www.readbyqxmd.com/read/28420396/determinants-of-village-doctors-job-satisfaction-under-china-s-health-sector-reform-a-cross-sectional-mixed-methods-study
#17
Tongtong Li, Trudy Lei, Fiona Sun, Zheng Xie
BACKGROUND: To strengthen rural health workforce, the Chinese government has launched a series of policies to promote the job satisfaction of village doctors since the health sector reform. The purpose of this mixed-method study is to describe village doctors' job satisfaction under the context of health sector reform and investigate the associated factors. METHODS: Data was obtained from a survey of village doctors across three Chinese provinces in 2014. Using a multistage sampling process, quantitative data was collected from village doctors through the self-administered questionnaire and analyzed by multilevel logistic regression models...
April 18, 2017: International Journal for Equity in Health
https://www.readbyqxmd.com/read/28418645/brain-region-and-isoform-specific-phosphorylation-alters-kalirin-sh2-domain-interaction-sites-and-calpain-sensitivity
#18
Megan B Miller, Yan Yan, Kazuya Machida, Drew D Kiraly, Aaron D Levy, Yi I Wu, TuKiet T Lam, Thomas Abbott, Anthony J Koleske, Betty A Eipper, Richard E Mains
Kalirin7 (Kal7), a postsynaptic Rho GDP/GTP exchange factor (RhoGEF), plays a crucial role in long-term potentiation and in the effects of cocaine on behavior and spine morphology. The KALRN gene has been linked to schizophrenia and other disorders of synaptic function. Mass spectrometry was used to quantify phosphorylation at 26 sites in Kal7 from individual adult rat nucleus accumbens and prefrontal cortex before and after exposure to acute or chronic cocaine. Region- and isoform-specific phosphorylation was observed along with region-specific effects of cocaine on Kal7 phosphorylation...
April 25, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28413361/cost-effectiveness-analysis-of-the-national-decentralization-policy-of-antiretroviral-treatment-programme-in-zambia
#19
Shinsuke Miyano, Gardner Syakantu, Kenichi Komada, Hiroyoshi Endo, Tomohiko Sugishita
BACKGROUND: In resource-limited settings with a high prevalence of human immunodeficiency virus (HIV) infection such as Zambia, decentralization of HIV/acquired immunodeficiency syndrome (HIV/AIDS) treatment and care with effective use of resources is a cornerstone of universal treatment and care. OBJECTIVES: This research aims to analyse the cost effectiveness of the National Mobile Antiretroviral Therapy (ART) Services Programme in Zambia as a means of decentralizing ART services...
2017: Cost Effectiveness and Resource Allocation: C/E
https://www.readbyqxmd.com/read/28412074/reversible-synthesis-of-colanic-acid-and-o-antigen-polysaccharides-in-salmonella-typhimurium-enhances-induction-of-cross-immune-responses-and-provides-protection-against-heterologous-salmonella-challenge
#20
Pei Li, Qing Liu, Chun Huang, Xinxin Zhao, Kenneth L Roland, Qingke Kong
Colanic Acid (CA) and lipopolysaccharide (LPS) are two major mannose-containing extracellular polysaccharides of Salmonella. Their presence on the bacterial surface can mask conserved protective outer membrane proteins (OMPs) from the host immune system. The mannose moiety in these molecules is derived from GDP-mannose, which is synthesized in several steps. The first two steps require the action of phosphomannose isomerase, encoded by pmi (manA), followed by phosphomannomutase, encoded by manB. There are two copies of manB present in the Salmonella chromosome, one located in the cps gene cluster (cpsG) responsible for CA synthesis, and the other in the rfb gene cluster (rfbK) involved in LPS O-antigen synthesis...
April 12, 2017: Vaccine
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