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https://www.readbyqxmd.com/read/28806784/structural-analysis-of-p-falciparum-kahrp-and-pfemp1-complexes-with-host-erythrocyte-spectrin-suggests-a-model-for-cytoadherent-knob-protrusions
#1
Erin E Cutts, Niklas Laasch, Dirk M Reiter, Raphael Trenker, Leanne M Slater, Phillip J Stansfeld, Ioannis Vakonakis
Plasmodium falciparum Erythrocyte Membrane Protein 1 (PfEMP1) and Knob-associated Histidine-rich Protein (KAHRP) are directly linked to malaria pathology. PfEMP1 and KAHRP cluster on protrusions (knobs) on the P. falciparum-infected erythrocyte surface and enable pathogenic cytoadherence of infected erythrocytes to the host microvasculature, leading to restricted blood flow, oxygen deprivation and damage of tissues. Here we characterize the interactions of PfEMP1 and KAHRP with host erythrocyte spectrin using biophysical, structural and computational approaches...
August 14, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28806767/hydrodynamic-repulsion-of-spheroidal-microparticles-from-micro-rough-surfaces
#2
Aleksey V Belyaev
Isolation of microparticles and biological cells from mixtures and suspensions is a central problem in a variety of biomedical applications. This problem, for instance, is of an immense importance for microfluidic devices manipulating with whole blood samples. It is instructive to know how the mobility and dynamics of rigid microparticles is altered by the presence of micrometer-size roughness on walls. The presented theoretical study addresses this issue via computer simulations. The approach is based on a combination of the Lattice Boltzmann method for calculating hydrodynamics and the Lagrangian Particle dynamics method to describe the dynamics of cell membranes...
2017: PloS One
https://www.readbyqxmd.com/read/28806752/the-escrt-iii-pathway-facilitates-cardiomyocyte-release-of-cbin1-containing-microparticles
#3
Bing Xu, Ying Fu, Yan Liu, Sosse Agvanian, Robert C Wirka, Rachel Baum, Kang Zhou, Robin M Shaw, TingTing Hong
Microparticles (MPs) are cell-cell communication vesicles derived from the cell surface plasma membrane, although they are not known to originate from cardiac ventricular muscle. In ventricular cardiomyocytes, the membrane deformation protein cardiac bridging integrator 1 (cBIN1 or BIN1+13+17) creates transverse-tubule (t-tubule) membrane microfolds, which facilitate ion channel trafficking and modulate local ionic concentrations. The microfold- generated microdomains continuously reorganize, adapting in response to stress to modulate the calcium signaling apparatus...
August 14, 2017: PLoS Biology
https://www.readbyqxmd.com/read/28806747/low-lamin-a-expression-in-lung-adenocarcinoma-cells-from-pleural-effusions-is-a-pejorative-factor-associated-with-high-number-of-metastatic-sites-and-poor-performance-status
#4
Elise Kaspi, Diane Frankel, Julien Guinde, Sophie Perrin, Sophie Laroumagne, Andrée Robaglia-Schlupp, Kevin Ostacolo, Karim Harhouri, Rachid Tazi-Mezalek, Joelle Micallef, Hervé Dutau, Pascale Tomasini, Annachiara De Sandre-Giovannoli, Nicolas Lévy, Pierre Cau, Philippe Astoul, Patrice Roll
The type V intermediate filament lamins are the principal components of the nuclear matrix, including the nuclear lamina. Lamins are divided into A-type and B-type, which are encoded by three genes, LMNA, LMNB1, and LMNB2. The alternative splicing of LMNA produces two major A-type lamins, lamin A and lamin C. Previous studies have suggested that lamins are involved in cancer development and progression. A-type lamins have been proposed as biomarkers for cancer diagnosis, prognosis, and/or follow-up. The aim of the present study was to investigate lamins in cancer cells from metastatic pleural effusions using immunofluorescence, western blotting, and flow cytometry...
2017: PloS One
https://www.readbyqxmd.com/read/28806729/erk2-and-jnk1-contribute-to-tnf-%C3%AE-induced-il-8-expression-in-synovial-fibroblasts
#5
Shinichi Namba, Rei Nakano, Taku Kitanaka, Nanako Kitanaka, Tomohiro Nakayama, Hiroshi Sugiya
Tumor necrosis factor α (TNF-α) induces the expression and secretion of interleukin 8 (IL-8), which contributes to synovitis in rheumatoid arthritis (RA). To elucidate the mechanism of the onset of RA, we used synovial fibroblasts without autoimmune inflammatory diseases and investigated MAPK signaling pathways in TNF-α-induced IL-8 expression. Synovial fibroblasts isolated from healthy dogs were characterized by flow cytometry, which were positive for the fibroblast markers CD29, CD44, and CD90 but negative for the hematopoietic cell markers CD14, CD34, CD45, and HLA-DR...
2017: PloS One
https://www.readbyqxmd.com/read/28806668/combination-of-electrochemical-biosensor-and-textile-threads-a-microfluidic-device-for-phenol-determination-in-tap-water
#6
F R Caetano, E A Carneiro, D Agustini, L C S Figueiredo-Filho, C E Banks, M F Bergamini, L H Marcolino-Junior
Microfluidic devices constructed using low cost materials presents as alternative for conventional flow analysis systems because they provide advantages as low consumption of reagents and samples, high speed of analysis, possibility of portability and the easiness of construction and maintenance. Herein, is described for the first time the use of an electrochemical biosensor for phenol detection combined with a very simple and efficient microfluidic device based on commercial textile threads. Taking advantages of capillary phenomena and gravity forces, the solution transportation is promoted without any external forces or injection pump...
July 29, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28806666/doxorubicin-loaded-environmentally-friendly-carbon-dots-as-a-novel-drug-delivery-system-for-nucleus-targeted-cancer-therapy
#7
Yifang Yuan, Bin Guo, Liying Hao, Na Liu, Yunfeng Lin, Wushuang Guo, Xiaoguang Li, Bin Gu
Chemotherapy is widely applied against various kinds of carcinoma. Generally, chemotherapeutic agents, such as Doxorubicin (DOX), Paclitaxel (PTX), 5-Fluorouracil (5-FU), Methotrexate (MTX), and Vinblastine (VLB) are combined with a view to maximizing their efficacy. Unfortunately, chemotherapeutics are indiscriminate and also kill normal healthy cells, resulting in serious side effects. This non-productive and destructive distribution of chemotherapeutics is regarded as one of the largest problems associated with chemotherapy...
July 10, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28806621/traumatic-common-hepatic-artery-injury-causing-isolated-right-hepatic-ischemia-due-to-a-left-accessory-artery-a-case-report
#8
Eduardo Fernandes, Corrado Pedrazzani, Marielia Gerena, Ellen Omi
INTRODUCTION: Hepatic arterial liver flow is renowned for its redundancy. Previous studies have demonstrated that the common hepatic artery is not essential for liver survival. We present a case of a 31year-old involved in a high-speed motor vehicle accident whose liver survived thanks to the presence of an accessory hepatic artery. PRESENTATON OF THE CASE: We present the case of a 31year-old male who sustained a traumatic injury of the proper hepatic artery following a motor vehicle accident...
August 8, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28806563/alteration-of-the-number-and-percentage-of-innate-immune-cells-in-preschool-children-from-an-e-waste-recycling-area
#9
Yu Zhang, Xijin Xu, Di Sun, Junjun Cao, Yuling Zhang, Xia Huo
Heavy metal lead (Pb) and cadmium (Cd) are widespread environmental contaminants and exert detrimental effects on the immune system. We evaluated the association between Pb/Cd exposures and innate immune cells in children from an electronic waste (e-waste) recycling area. A total number of 294 preschool children were recruited, including 153 children from Guiyu (e-waste exposed group), and 141 from Haojiang (reference group). Pb and Cd levels in peripheral blood were measured by graphite furnace atomic absorption spectrophotometer, NK cell percentages were detected by flow cytometer, and other innate immune cells including monocytes, eosinophils, neutrophils and basophils were immediately measured by automated hematology analyzer...
August 11, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28806554/metal-bioaccumulation-and-biomarkers-of-effects-in-caged-mussels-exposed-in-the-athabasca-oil-sands-area
#10
M Pilote, C André, P Turcotte, F Gagné, C Gagnon
The Athabasca oil sands deposit is the world's largest known reservoir of crude bitumen and the third-largest proven crude oil reserve. Mining activity is known to release contaminants, including metals, and to potentially impact the aquatic environment. The purpose of this study was to determine the impacts of oil sands mining on water quality and metal bioaccumulation in mussels from the Fort McMurray area in northern Alberta, Canada. The study presents two consecutive years of contrasting mussel exposure conditions (low and high flows)...
August 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28806532/the-impact-of-an-acute-oral-phosphate-load-on-endothelium-dependent-and-independent-brachial-artery-vasodilation-in-healthy-males
#11
Brendan M Levac, Michael A Adams, Kyra E Pyke
Serum phosphate levels are associated with cardiovascular morbidity and mortality in the general population and endothelial dysfunction may be mechanistically involved. The purpose of this study was to investigate the effects of acute phosphate supplementation on endothelial-dependent (Flow mediated dilation (FMD)) and -independent (Glyceryl trinitrate (GTN)) vasodilation in young, healthy males. 17 healthy male participants (23±3 years old) were exposed to an oral load of phosphate (PHOS; (liquid supplement containing 1200 mg of phosphorous) and placebo (PLAC) over two experimental days...
August 14, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28806506/quantifying-recycling-and-losses-of-cr-and-ni-in-steel-throughout-multiple-life-cycles-using-matrace-alloy
#12
Shinichiro Nakamura, Yasushi Kondo, Kenichi Nakajima, Hajime Ohno, Stefan Pauliuk
Alloying metals are indispensable ingredients of high quality alloy steel such as austenitic stainless steel, the cyclical use of which is vital for sustainable resource management. Under the current practice of recycling, however, different metals are likely to be mixed in an uncontrolled manner, resulting in function losses and dissipation of metals with distinctive functions, and in the contamination of recycled steels. The latter could result in dilution loss, if metal scrap needed dilution with virgin iron to reduce the contamination below critical levels...
August 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28806403/th17-cells-are-associated-with-protection-from-ventilator-associated-pneumonia
#13
Marika Orlov, Victoria Dmyterko, Mark M Wurfel, Carmen Mikacenic
BACKGROUND: CD4+ T-helper 17 (Th17) cells and Interleukin (IL)-17A play an important role in clearing pathogens in mouse models of pneumonia. We hypothesized that numbers of Th17 cells and levels of IL-17A are associated with risk for nosocomial pneumonia in humans. METHODS: We collected bronchoalveolar lavage (BAL) fluid from mechanically ventilated (n = 25) patients undergoing quantitative bacterial culture to evaluate for ventilator associated pneumonia (VAP)...
2017: PloS One
https://www.readbyqxmd.com/read/28806284/is-extracorporeal-cardiopulmonary-resuscitation-practical-in-severe-chest-trauma-a-systematic-review-in-single-center-of-developing-country
#14
Up Huh, Seunghwan Song, Sung Woon Chung, Sang-Pil Kim, Chung Won Lee, Hyo Young Ahn, Miju Bae, Seon Hee Kim
BACKGROUND: We report our experience with extracorporeal cardiopulmonary resuscitation (ECPR) in patients with rupture of heart and major vessels caused by severe chest trauma. METHODS: From April 2015 to May 2016, 10 patients with suspected injuries to the heart and major vessels following focused assessment with sonography in trauma or computed tomography were selected from patients admitted at a level I trauma centre presenting with cardiac tamponade and tension haemothorax due to severe chest trauma...
August 12, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28806280/integrated-analysis-of-biopsies-from-inflammatory-bowel-disease-patients-identifies-saa1-as-a-link-between-mucosal-microbes-with-th17-and-th22-cells
#15
Mei San Tang, Rowann Bowcutt, Jacqueline M Leung, Martin J Wolff, Uma M Gundra, David Hudesman, Lisa B Malter, Michael A Poles, Lea Ann Chen, Zhiheng Pei, Antonio G Neto, Wasif M Abidi, Thomas Ullman, Lloyd Mayer, Richard A Bonneau, Ilseung Cho, Pʼng Loke
BACKGROUND: Inflammatory bowel diseases (IBD) are believed to be driven by dysregulated interactions between the host and the gut microbiota. Our goal is to characterize and infer relationships between mucosal T cells, the host tissue environment, and microbial communities in patients with IBD who will serve as basis for mechanistic studies on human IBD. METHODS: We characterized mucosal CD4 T cells using flow cytometry, along with matching mucosal global gene expression and microbial communities data from 35 pinch biopsy samples from patients with IBD...
August 9, 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28806276/circulating-progenitor-cell-response-to-exercise-in-wheelchair-racing-athletes
#16
Grace M Niemiro, Thomas Edwards, J P Barfield, Joseph W Beals, Elizabeth M Broad, Robert W Motl, Nicholas A Burd, Lara A Pilutti, Michael De Lisio
INTRODUCTION: Circulating progenitor cells (CPCs) are a heterogeneous population of stem/progenitor cells in peripheral blood that participate in tissue repair. CPC mobilization has been well characterized in able-bodied persons, but has not been previously investigated in wheelchair racing athletes. The purpose of this study was to characterize CPC and CPC sub-population mobilization in elite wheelchair racing athletes in response to acute, upper-extremity aerobic exercise to determine if CPC responses are similar to ambulatory populations...
August 11, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28806218/hypoxemic-patients-with-bilateral-infiltrates-treated-with-high-flow-nasal-cannula-present-a-similar-pattern-of-biomarkers-of-inflammation-and-injury-to-acute-respiratory-distress-syndrome-patients
#17
Marina García-de-Acilu, Judith Marin-Corral, Antonia Vázquez, Laura Ruano, Mònica Magret, Ricard Ferrer, Joan R Masclans, Oriol Roca
OBJECTIVE: To examine whether patients with acute hypoxemia and bilateral opacities treated with high-flow nasal cannula and acute respiratory distress syndrome patients who were directly mechanically ventilated are similar in terms of lung epithelial, endothelial, and inflammatory biomarkers. DESIGN: Prospective, multicenter study. SETTING: ICUs at three university tertiary hospitals. PATIENTS: Intubated and nonintubated patients admitted to the ICU with acute hypoxemia (PaO2/FIO2 ≤ 300) and bilateral opacities...
August 10, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28806081/chlorination-kinetics-of-11-nor-9-carboxy-%C3%AE-9-tetrahydrocannabinol-effects-of-ph-and-humic-acid
#18
Allison L Mackie, Yuri Park, Graham A Gagnon
The main psychoactive compound in marijuana, Δ9-tetrahydrocannabinol (THC), and its metabolites are emerging organic contaminants that have been detected in waste and surface waters. As legalization of marijuana for medical and recreational use continues, the effects of increased use and potency of marijuana on water and wastewater treatment processes and the environment should be considered. This study examined degradation kinetics of the main urinary metabolite of THC, 11-nor-9-carboxy-Δ9-tetrahydrocannabinol (THC-COOH) with chlorine...
August 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28806052/one-step-nanoscale-electrohydrodynamic-inkjet-three-dimensional-printing-technique-with-spontaneous-joule-heating
#19
Bin Zhang, Baekhoon Seong, Jaehyun Lee, VuDat Nguyen, DaeHyun Cho, Doyoung Byun
A one-step nanoscale electrohydrodynamic (EHD) inkjet three-dimensional (3D)-printing technique that is based on the drop-on-demand (DOD) operation for which an additional post-sintering process is not required is proposed. Both the numerical simulation and the experimental observations proved that nanoscale Joule heating occurs at the interface between the charged silver nanoparticles (Ag-NPs) because of the high electrical contact resistance during the printing process; this is the reason why an additional post-sintering process is not required...
August 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28806029/atrial-fibrillation-induced-by-carbon-monoxide-poisoning-and-successful-treatment-with-hyperbaric-oxygen
#20
Maheedhar Gedela, Nathan Y Weltman, Naga Sushma Chavvakula, Paul L Carpenter, Tamera Sturm
Carbon monoxide (CO) intoxication is one of the major public health hazards which may go unnoticed as this is a colorless, odorless and tasteless gas. The manifestations of the CO poisoning are far-reaching. Although CO affects almost every organ in the body, cerebral and myocardial involvement are predominant due to the hypoxia-induced cellular damage. The mainstay treatment is providing high-flow oxygen and in some instances hyperbaric oxygen therapy. In the literature, there have been few cases of CO poisoning-induced atrial fibrillation (AF) reported...
July 2017: South Dakota Medicine: the Journal of the South Dakota State Medical Association
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