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https://www.readbyqxmd.com/read/28441768/probabilistic-fatigue-life-updating-for-railway-bridges-based-on-local-inspection-and-repair
#1
Young-Joo Lee, Robin E Kim, Wonho Suh, Kiwon Park
Railway bridges are exposed to repeated train loads, which may cause fatigue failure. As critical links in a transportation network, railway bridges are expected to survive for a target period of time, but sometimes they fail earlier than expected. To guarantee the target bridge life, bridge maintenance activities such as local inspection and repair should be undertaken properly. However, this is a challenging task because there are various sources of uncertainty associated with aging bridges, train loads, environmental conditions, and maintenance work...
April 24, 2017: Sensors
https://www.readbyqxmd.com/read/28441133/transport-of-critically-ill-patients
#2
Jude Kornelsen, Stefan Grzybowski, Brent Hobbs
No abstract text is available yet for this article.
2017: Canadian Journal of Rural Medicine
https://www.readbyqxmd.com/read/28439270/cytokine-regulation-of-na-k-cl-cotransporter-1-and-cystic-fibrosis-transmembrane-conductance-regulator-potential-role-in-pulmonary-inflammation-and-edema-formation
#3
REVIEW
Sarah Weidenfeld, Wolfgang M Kuebler
Pulmonary edema, a major complication of lung injury and inflammation, is defined as accumulation of extravascular fluid in the lungs leading to impaired diffusion of respiratory gases. Lung fluid balance across the alveolar epithelial barrier protects the distal airspace from excess fluid accumulation and is mainly regulated by active sodium transport and Cl(-) absorption. Increased hydrostatic pressure as seen in cardiogenic edema or increased vascular permeability as present in inflammatory lung diseases such as the acute respiratory distress syndrome (ARDS) causes a reversal of transepithelial fluid transport resulting in the formation of pulmonary edema...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28439268/alveolar-fluid-clearance-in-pathologically-relevant-conditions-in-vitro-and-in-vivo-models-of-acute-respiratory-distress-syndrome
#4
REVIEW
Laura A Huppert, Michael A Matthay
Critically ill patients with respiratory failure from acute respiratory distress syndrome (ARDS) have reduced ability to clear alveolar edema fluid. This reduction in alveolar fluid clearance (AFC) contributes to the morbidity and mortality in ARDS. Thus, it is important to understand why AFC is reduced in ARDS in order to design targeted therapies. In this review, we highlight experiments that have advanced our understanding of ARDS pathogenesis, with particular reference to the alveolar epithelium. First, we review how vectorial ion transport drives the clearance of alveolar edema fluid in the uninjured lung...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28439258/diabetic-cardiomyopathy-an-immunometabolic-perspective
#5
REVIEW
Paras K Mishra, Wei Ying, Shyam Sundar Nandi, Gautam K Bandyopadhyay, Kaushik K Patel, Sushil K Mahata
The heart possesses a remarkable inherent capability to adapt itself to a wide array of genetic and extrinsic factors to maintain contractile function. Failure to sustain its compensatory responses results in cardiac dysfunction, leading to cardiomyopathy. Diabetic cardiomyopathy (DCM) is characterized by left ventricular hypertrophy and reduced diastolic function, with or without concurrent systolic dysfunction in the absence of hypertension and coronary artery disease. Changes in substrate metabolism, oxidative stress, endoplasmic reticulum stress, formation of extracellular matrix proteins, and advanced glycation end products constitute the early stage in DCM...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28439219/the-utility-of-csf-for-the-diagnosis-of-primary-and-secondary-monoamine-neurotransmitter-deficiencies
#6
A B Burlina, A Celato, G Polo, C Edini, A P Burlina
Biogenic amine defects constitute a complex and expanding group of neurotransmitter disorders affecting cognitive, motor and autonomic system development, mostly in the pediatric age. In recent years different enzymatic defects have been identified impairing the tetrahydrobiopterin cofactor pathway and/or biogenic amine synthesis, catabolism and transport, with subsequent new disease entities described. The lumbar puncture, with subsequent withdrawal of cerebrospinal fluid (CSF), remains a key step in the diagnostic procedure...
March 2017: EJIFCC
https://www.readbyqxmd.com/read/28439098/uncoupling-dapk1-from-nmda-receptor-glun2b-subunit-exerts-rapid-antidepressant-like-effects
#7
S-X Li, Y Han, L-Z Xu, K Yuan, R-X Zhang, C-Y Sun, D-F Xu, M Yuan, J-H Deng, S-Q Meng, X-J Gao, Q Wen, L-J Liu, W-L Zhu, Y-X Xue, M Zhao, J Shi, L Lu
Several preclinical studies have reported the rapid antidepressant effects of N-methyl-D-aspartate receptor (NMDAR) antagonists, although the underlying mechanisms are still unclear. Death-associated protein kinase 1 (DAPK1) couples GluN2B subunits at extrasynaptic sites to regulate NMDAR channel conductance. In the present study, we found that chronic unpredictable stress (CUS) induced extracellular glutamate accumulation, accompanied by an increase in the DAPK1-NMDAR interaction, the high expression of DAPK1 and phosphorylated GluN2B at Ser1303, a decrease in phosphorylated DAPK1 at Ser308 and synaptic protein deficits in the rat medial prefrontal cortex (mPFC)...
April 25, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28439024/nip1-2-is-a-plasma-membrane-localized-transporter-mediating-aluminum-uptake-translocation-and-tolerance-in-arabidopsis
#8
Yuqi Wang, Ruihong Li, Demou Li, Xiaomin Jia, Dangwei Zhou, Jianyong Li, Sangbom M Lyi, Siyu Hou, Yulan Huang, Leon V Kochian, Jiping Liu
Members of the aquaporin (AQP) family have been suggested to transport aluminum (Al) in plants; however, the Al form transported by AQPs and the roles of AQPs in Al tolerance remain elusive. Here we report that NIP1;2, a plasma membrane-localized member of the Arabidopsis nodulin 26-like intrinsic protein (NIP) subfamily of the AQP family, facilitates Al-malate transport from the root cell wall into the root symplasm, with subsequent Al xylem loading and root-to-shoot translocation, which are critical steps in an internal Al tolerance mechanism in Arabidopsis We found that NIP1;2 transcripts are expressed mainly in the root tips, and that this expression is enhanced by Al but not by other metal stresses...
April 24, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28438991/differentiation-of-v2a-interneurons-from-human-pluripotent-stem-cells
#9
Jessica C Butts, Dylan A McCreedy, Jorge Alexis Martinez-Vargas, Frederico N Mendoza-Camacho, Tracy A Hookway, Casey A Gifford, Praveen Taneja, Linda Noble-Haeusslein, Todd C McDevitt
The spinal cord consists of multiple neuronal cell types that are critical to motor control and arise from distinct progenitor domains in the developing neural tube. Excitatory V2a interneurons in particular are an integral component of central pattern generators that control respiration and locomotion; however, the lack of a robust source of human V2a interneurons limits the ability to molecularly profile these cells and examine their therapeutic potential to treat spinal cord injury (SCI). Here, we report the directed differentiation of CHX10(+) V2a interneurons from human pluripotent stem cells (hPSCs)...
April 24, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28438786/vegfr2-but-not-vegfr3-governs-integrity-and-remodeling-of-thyroid-angiofollicular-unit-in-normal-state-and-during-goitrogenesis
#10
Jeon Yeob Jang, Sung Yong Choi, Intae Park, Do Young Park, Kibaek Choe, Pilhan Kim, Young Keum Kim, Byung-Joo Lee, Masanori Hirashima, Yoshiaki Kubota, Jeong-Won Park, Sheue-Yann Cheng, Andras Nagy, Young Joo Park, Kari Alitalo, Minho Shong, Gou Young Koh
Thyroid gland vasculature has a distinguishable characteristic of endothelial fenestrae, a critical component for proper molecular transport. However, the signaling pathway that critically governs the maintenance of thyroid vascular integrity, including endothelial fenestrae, is poorly understood. Here, we found profound and distinct expression of follicular epithelial VEGF-A and vascular VEGFR2 that were precisely regulated by circulating thyrotropin, while there were no meaningful expression of angiopoietin-Tie2 system in the thyroid gland...
April 24, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/28438535/a-critical-view-on-in-vitro-analysis-of-p-glycoprotein-p-gp-transport-kinetics
#11
Lasse Saaby, Birger Brodin
Transport proteins expressed in the different barriers of the human body can have great implications on absorption, distribution and excretion of drug compounds. Inhibition or saturation of a transporter can potentially alter these ADME properties, and thereby also the pharmacokinetic profile and bioavailability of drug compounds. P-glycoprotein (P-gp, ABCB1), is an efflux transporter which is present in most of the barriers of the body, including the small intestine, the blood-brain barrier, the liver and the kidney...
April 21, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28438218/malaria-elimination-in-lao-pdr-the-challenges-associated-with-population-mobility
#12
REVIEW
Sengchanh Kounnavong, Deyer Gopinath, Bouasy Hongvanthong, Chanthalone Khamkong, Odai Sichanthongthip
Although the Lao People's Democratic Republic (Lao PDR) is comparatively small landlocked country with patterns of both in- and out-migration, its human migration situation has been poorly studied. This is despite all of the country's 18 provinces sharing both official and unofficial border checkpoints with neighboring countries. Economic reforms in the last decade have seen a gradual increase in the promotion of foreign investment, and main towns and transportation networks have been expanding thus offering new opportunities for livelihoods and economic activities...
April 25, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28436820/srna-mediated-activation-of-gene-expression-by-inhibition-of-5-3-exonucleolytic-mrna-degradation
#13
Sylvain Durand, Frédérique Braun, Anne-Catherine Helfer, Pascale Romby, Ciarán Condon
Post-transcriptional control by small regulatory RNA (sRNA) is critical for rapid adaptive processes. sRNAs can directly modulate mRNA degradation in Proteobacteria without interfering with translation. However, Firmicutes have a fundamentally different set of ribonucleases for mRNA degradation and whether sRNAs can regulate the activity of these enzymes is an open question. We show that Bacillus subtilis RoxS, a major trans-acting sRNA shared with Staphylococus aureus, prevents degradation of the yflS mRNA, encoding a malate transporter...
April 24, 2017: ELife
https://www.readbyqxmd.com/read/28435494/the-efficacy-of-lucas-in-prehospital-cardiac-arrest-scenarios-a-crossover-mannequin-study
#14
Robert A Gyory, Scott E Buchle, David Rodgers, Jeffrey S Lubin
INTRODUCTION: High-quality cardiopulmonary resuscitation (CPR) is critical for successful cardiac arrest outcomes. Mechanical devices may improve CPR quality. We simulated a prehospital cardiac arrest, including patient transport, and compared the performance of the LUCAS™ device, a mechanical chest compression-decompression system, to manual CPR. We hypothesized that because of the movement involved in transporting the patient, LUCAS would provide chest compressions more consistent with high-quality CPR guidelines...
April 2017: Western Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28434950/an-arabidopsis-lipid-flippase-is-required-for-timely-recruitment-of-defenses-to-the-host-pathogen-interface-at-the-plant-cell-surface
#15
William Underwood, Andrew Ryan, Shauna C Somerville
Deposition of cell wall-reinforcing papillae is an integral component of the plant immune response. The Arabidopsis PENETRATION 3 (PEN3) ATP binding cassette (ABC) transporter plays a role in defense against numerous pathogens and is recruited to sites of pathogen detection where it accumulates within papillae. However, the trafficking pathways and regulatory mechanisms contributing to recruitment of PEN3 and other defenses to the host-pathogen interface are poorly understood. Here, we report a confocal microscopy-based screen to identify mutants with altered localization of PEN3-GFP after inoculation with powdery mildew fungi...
April 18, 2017: Molecular Plant
https://www.readbyqxmd.com/read/28434495/dysfunction-of-the-cerebral-glucose-transporter-slc45a1-in-individuals-with-intellectual-disability-and-epilepsy
#16
Myriam Srour, Noriaki Shimokawa, Fadi F Hamdan, Christina Nassif, Chantal Poulin, Lihadh Al Gazali, Jill A Rosenfeld, Noriyuki Koibuchi, Guy A Rouleau, Aisha Al Shamsi, Jacques L Michaud
Glucose transport across the blood brain barrier and into neural cells is critical for normal cerebral physiologic function. Dysfunction of the cerebral glucose transporter GLUT1 (encoded by SLC2A1) is known to result in epilepsy, intellectual disability (ID), and movement disorder. Using whole-exome sequencing, we identified rare homozygous missense variants (c.526C>T [p.Arg176Trp] and c.629C>T [p.Ala210Val]) in SLC45A1, encoding another cerebral glucose transporter, in two consanguineous multiplex families with moderate to severe ID, epilepsy, and variable neuropsychiatric features...
April 18, 2017: American Journal of Human Genetics
https://www.readbyqxmd.com/read/28433989/oral-contraceptives-after-bariatric-surgery
#17
Joël Schlatter
OBJECTIVE: Bariatric surgery offers a highly effective mode of treatment for obese patients. Some procedures such as bypass cause an alteration in normal gastrointestinal tract with possible consequences for the uptake of orally administered drugs. METHODS: We assessed the literature to ascertain whether the use of oral drugs and especially oral contraceptives is effective and adequate after bariatric surgery. RESULTS: The bioavailability of drugs could be affected by the solubility and pH of the modified medium after bariatric surgery and by the loss of gastrointestinal transporters...
April 22, 2017: Obesity Facts
https://www.readbyqxmd.com/read/28433102/the-genetics-of-wilson-disease
#18
Irene J Chang, Si Houn Hahn
Wilson disease (WD) is an autosomal-recessive disorder of hepatocellular copper deposition caused by pathogenic variants in the copper-transporting gene, ATP7B. Early detection and treatment are critical to prevent lifelong neuropsychiatric, hepatic, and systemic disabilities. Due to the marked heterogeneity in age of onset and clinical presentation, the diagnosis of Wilson disease remains challenging to physicians today. Direct sequencing of the ATP7B gene is the most sensitive and widely used confirmatory testing method, and concurrent biochemical testing improves diagnostic accuracy...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28432970/insights-into-key-factors-controlling-go-stability-in-natural-surface-waters
#19
Yang Gao, Xuemei Ren, Xiaoli Tan, Tasawar Hayat, Ahmed Alsaedi, Changlun Chen
The effects of pH, cations (Na(+), K(+), Mg(2+), Ca(2+) and Al(3+)), and anions (Cl(-), HCO3(-), HPO4(2-) and SO4(2-)) on graphene oxide (GO) stability were investigated to address the current limitations in the knowledge regarding the stability of GO in natural surface water and its underlying mechanism. The threshold values of cations that destabilize GO were obtained and affected by both pH and anions. By employing elemental mapping and studying the effects of polyacrylic acid (PAA) on GO sedimentation and the re-dispersion of GO aggregates, we find that the GO aggregates induced by Na(+) and K(+) via electric double layer suppression and by Ca(2+) and Al(3+) via strong complxing are difficult to re-disperse completely...
April 11, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28432149/cd73-on-t-cells-orchestrates-cardiac-wound-healing-after-myocardial-infarction-by-purinergic-metabolic-reprogramming
#20
Nadine Borg, Christina Alter, Nicole Görldt, Christoph Jacoby, Zhaoping Ding, Bodo Steckel, Christine Quast, Florian Bönner, Daniela Friebe, Sebastian Temme, Ulrich Flögel, Jürgen Schrader
Background -T-cells are required for proper healing after myocardial infarction. The mechanism of their beneficial action, however, is unknown. The pro-inflammatory "danger signal" adenosine triphosphate (ATP), released from damaged cells, is degraded by the ectonucleotidases CD39 and CD73 to the anti-inflammatory mediator adenosine. Here, we investigate the contribution of CD73-derived adenosine produced by T-cells to cardiac remodeling after ischemia/reperfusion and define its mechanism of action. Methods -Myocardial ischemia (50 min /reperfusion) was induced in global CD73(-/-) and CD4-CD73(-/-) mice...
April 21, 2017: Circulation
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