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https://www.readbyqxmd.com/read/28443274/the-guatemala-penn-partners-an-innovative-inter-institutional-model-for-scientific-capacity-building-healthcare-education-and-public-health
#1
Maria Alejandra Paniagua-Avila, Elizabeth Messenger, Caroline A Nelson, Erwin Calgua, Frances K Barg, Kent W Bream, Charlene Compher, Anthony J Dean, Sergio Martinez-Siekavizza, Victor Puac-Polanco, Therese S Richmond, Rudolf R Roth, Charles C Branas
Population health outcomes are directly related to robust public health programs, access to basic health services, and a well-trained health-care workforce. Effective health services need to systematically identify solutions, scientifically test these solutions, and share generated knowledge. The World Health Organization (WHO)'s Global Healthcare Workforce Alliance states that the capacity to perform research is an essential factor for well-functioning public health systems. Low- and middle-income countries have greater health-care worker shortages and lower research capacity than higher-income countries...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/28436054/low-cost-manufacturing-of-bioresorbable-conductors-by-evaporation-condensation-mediated-laser-printing-and-sintering-of-zn-nanoparticles
#2
Wan Shou, Bikram K Mahajan, Brandon Ludwig, Xiaowei Yu, Joshua Staggs, Xian Huang, Heng Pan
Currently, bioresorbable electronic devices are predominantly fabricated by complex and expensive vacuum-based integrated circuit (IC) processes. Here, a low-cost manufacturing approach for bioresorbable conductors on bioresorbable polymer substrates by evaporation-condensation-mediated laser printing and sintering of Zn nanoparticle is reported. Laser sintering of Zn nanoparticles has been technically difficult due to the surface oxide on nanoparticles. To circumvent the surface oxide, a novel approach is discovered to print and sinter Zn nanoparticle facilitated by evaporation-condensation in confined domains...
April 24, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28432914/adaptive-optimization-of-ultrasound-beamforming-sound-velocity-using-sub-aperture-differential-phase-gradient
#3
Che-Chou Shen, Hsiao-Chi Yang
Ultrasound array imaging systems rely on a presumed beamforming sound velocity to calculate the time compensation of each element for receive focusing. The mismatch between the tissue sound velocity and the beamforming sound velocity can degrade the focusing quality due to loss of phase coherence. Since the tissue sound velocity cannot be known in prior, an adaptive optimization of beamforming sound velocity is required to improve the image quality. Differential phase gradient of channel data is proposed to estimate the optimal sound velocity for beamforming...
April 12, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28432453/the-influence-of-oxo-bridged-binuclear-gold-iii-complexes-on-na-k-atpase-activity-a-joint-experimental-and-theoretical-approach
#4
Aleksandra M Bondžić, Mirjana B Čolović, Goran V Janjić, Božidarka Zarić, Sandra Petrović, Danijela Z Krstić, Tiziano Marzo, Luigi Messori, Vesna M Vasić
The in vitro effects of oxo-bridged binuclear gold(III) complexes, i.e., [(bipy2Me)2Au2(μ-O)2][PF6]2 (Auoxo6), Au2[(bipydmb-H)2(μ-O)][PF6] (Au2bipyC) and [Au2(phen(2Me))2(μ-O)2](PF6)2 (Au2phen) on Na/K-ATPase, purified from the porcine cerebral cortex, were investigated. All three studied gold complexes inhibited the enzyme activity in a concentration-dependent manner achieving IC50 values in the low micromolar range. Kinetic analysis suggested an uncompetitive mode of inhibition for Auoxo6 and Au2bipyC, and a mixed type one for Au2phen...
April 21, 2017: Journal of Biological Inorganic Chemistry: JBIC
https://www.readbyqxmd.com/read/28432364/rrm-domain-of-als-ftd-causing-fus-characteristic-of-irreversible-unfolding-spontaneously-self-assembles-into-amyloid-fibrils
#5
Yimei Lu, Liangzhong Lim, Jianxing Song
526-residue FUS functions to self-assemble into reversible droplets/hydrogels, which could be further solidified into pathological fibrils. FUS is intrinsically prone to aggregation, composed of N-terminal low-sequence complexity (LC); RNA-recognition motif (RRM) and C-terminal LC domains. Intriguingly, previous in vivo studies revealed that its RRM is required for manifesting FUS cytotoxicity but the underlying mechanism remains unknown. Here, we characterized solution conformations of FUS and its five differentially dissected fragments, followed by detailed investigations on thermal unfolding, NMR dynamics and self-assembly of RRM...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28428666/linear-short-term-heart-rate-variability-parameters-of-subjects-tobacco-cigarette-smokers-and-subjects-nonsmokers-in-preoperative-period
#6
Meldijana Omerbegovic
BACKGROUND: Variations of heart cycles reflect complex dynamic cardiocirculatory regulatory systems in humans. Exposure to tobacco from cigarettes has been shown to elicit specific alterations of heart rate variability parameters leading to predominance of sympathetic and decreasing parameters of parasympathetic measures of cardiac autonomic nervous system tone. AIM: The aim of the trial was assessing differences of linear parameters of heart rate variability in subjects with habit of consuming of cigarettes tobacco in regard to subjects who are not consumers of tobacco...
February 2017: Medical Archives
https://www.readbyqxmd.com/read/28428165/a-framework-for-the-study-of-complex-mhealth-interventions-in-diverse-cultural-settings
#7
Marion A Maar, Karen Yeates, Nancy Perkins, Lisa Boesch, Diane Hua-Stewart, Peter Liu, Jessica Sleeth, Sheldon W Tobe
BACKGROUND: To facilitate decision-making capacity between options of care under real-life service conditions, clinical trials must be pragmatic to evaluate mobile health (mHealth) interventions under the variable conditions of health care settings with a wide range of participants. The mHealth interventions require changes in the behavior of patients and providers, creating considerable complexity and ambiguity related to causal chains. Process evaluations of the implementation are necessary to shed light on the range of unanticipated effects an intervention may have, what the active ingredients in everyday practice are, how they exert their effect, and how these may vary among recipients or between sites...
April 20, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28427580/quality-of-life-after-surgery-or-des-in-patients-with-3-vessel-or-left-main-disease
#8
Mouin S Abdallah, Kaijun Wang, Elizabeth A Magnuson, Ruben L Osnabrugge, A Pieter Kappetein, Marie-Claude Morice, Friedrich A Mohr, Patrick W Serruys, David J Cohen
BACKGROUND: In the SYNTAX (Synergy Between Percutaneous Coronary Intervention With Taxus and Cardiac Surgery) trial, patients with 3-vessel or left main coronary artery disease (CAD) had improved long-term outcomes with coronary artery bypass graft (CABG) surgery compared with percutaneous coronary intervention (PCI) with drug-eluting stents (DES), improvements driven mainly by differences in myocardial infarction and repeat revascularization. OBJECTIVES: This study compared the long-term quality-of-life benefits of DES-PCI versus CABG for patients with 3-vessel or left main CAD...
April 25, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28425435/fret-biosensor-uncovers-camp-nano-domains-at-%C3%AE-adrenergic-targets-that-dictate-precise-tuning-of-cardiac-contractility
#9
Nicoletta C Surdo, Marco Berrera, Andreas Koschinski, Marcella Brescia, Matias R Machado, Carolyn Carr, Peter Wright, Julia Gorelik, Stefano Morotti, Eleonora Grandi, Donald M Bers, Sergio Pantano, Manuela Zaccolo
Compartmentalized cAMP/PKA signalling is now recognized as important for physiology and pathophysiology, yet a detailed understanding of the properties, regulation and function of local cAMP/PKA signals is lacking. Here we present a fluorescence resonance energy transfer (FRET)-based sensor, CUTie, which detects compartmentalized cAMP with unprecedented accuracy. CUTie, targeted to specific multiprotein complexes at discrete plasmalemmal, sarcoplasmic reticular and myofilament sites, reveals differential kinetics and amplitudes of localized cAMP signals...
April 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28420962/dysregulation-of-rna-binding-protein-aggregation-in-neurodegenerative-disorders
#10
REVIEW
Brandon Maziuk, Heather I Ballance, Benjamin Wolozin
The unique biology of RNA binding proteins is altering our view of the genesis of protein misfolding diseases. These proteins use aggregation of low complexity domains (LCDs) as a means to regulate the localization and utilization of RNA by forming RNA granules, such as stress granules, transport granules and P-bodies. The reliance on reversible aggregation as a mechanism for biological regulation renders this family of proteins highly vulnerable to promoting diseases of protein misfolding. Mutations in RNA binding proteins are associated with many neurodegenerative disorders, such as amyotrophic lateral sclerosis (ALS) and frontotemporal lobar dementia (FTLD)...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28420787/activation-of-nlrp3-inflammasome-complex-potentiates-venous-thrombosis-in-response-to-hypoxia
#11
Neha Gupta, Anita Sahu, Amit Prabhakar, Tathagata Chatterjee, Tarun Tyagi, Babita Kumari, Nilofar Khan, Velu Nair, Nitin Bajaj, Manish Sharma, Mohammad Zahid Ashraf
Venous thromboembolism (VTE), caused by altered hemostasis, remains the third most common cause of mortality among all cardiovascular conditions. In addition to established genetic and acquired risk factors, low-oxygen environments also predispose otherwise healthy individuals to VTE. Although disease etiology appears to entail perturbation of hemostasis pathways, the key molecular determinants during immediate early response remain elusive. Using an established model of venous thrombosis, we here show that systemic hypoxia accelerates thromboembolic events, functionally stimulated by the activation of nucleotide binding domain, leucine-rich-containing family, pyrin domain containing 3 (NLRP3) inflammasome complex and increased IL-1β secretion...
April 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28416675/integrin-extension-enables-ultrasensitive-regulation-by-cytoskeletal-force
#12
Jing Li, Timothy A Springer
Integrins undergo large-scale conformational changes upon activation. Signaling events driving integrin activation have previously been discussed conceptually, but not quantitatively. Here, recent measurements of the intrinsic ligand-binding affinity and free energy of each integrin conformational state on the cell surface, together with the length scales of conformational change, are used to quantitatively compare models of activation. We examine whether binding of cytoskeletal adaptors to integrin cytoplasmic domains is sufficient for activation or whether exertion of tensile force by the actin cytoskeleton across the integrin-ligand complex is also required...
April 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28410860/comprehensive-screening-for-suicide-risk-in-primary-care
#13
Guy S Diamond, Joanna L Herres, E Stephanie Krauthamer Ewing, Tita O Atte, Syreeta W Scott, Matt B Wintersteen, Robert J Gallop
INTRODUCTION: Suicide is a major public health problem and a complex clinical challenge. Assessment and early identification could be enhanced with screening tools that look beyond depression. The purpose of this study was to identify profiles of risk behaviors and social stress associated with suicidal ideation and behavior using the Behavioral Health Screen. METHODS: The study used screening data from 2,513 primary care patients (aged 14-24 years). Data were collected between 2008 and 2012, and were analyzed in 2016...
April 11, 2017: American Journal of Preventive Medicine
https://www.readbyqxmd.com/read/28407027/an-efficient-depth-map-preprocessing-method-based-on-structure-aided-domain-transform-smoothing-for-3d-view-generation
#14
Wei Liu, Liyan Ma, Bo Qiu, Mingyue Cui, Jianwei Ding
Depth image-based rendering (DIBR), which is used to render virtual views with a color image and the corresponding depth map, is one of the key techniques in the 2D to 3D conversion process. Due to the absence of knowledge about the 3D structure of a scene and its corresponding texture, DIBR in the 2D to 3D conversion process, inevitably leads to holes in the resulting 3D image as a result of newly-exposed areas. In this paper, we proposed a structure-aided depth map preprocessing framework in the transformed domain, which is inspired by recently proposed domain transform for its low complexity and high efficiency...
2017: PloS One
https://www.readbyqxmd.com/read/28400755/comparative-evaluation-of-four-bacteria-specific-primer-pairs-for-16s-rrna-gene-surveys
#15
Sofie Thijs, Michiel Op De Beeck, Bram Beckers, Sascha Truyens, Vincent Stevens, Jonathan D Van Hamme, Nele Weyens, Jaco Vangronsveld
Bacterial taxonomic community analyses using PCR-amplification of the 16S rRNA gene and high-throughput sequencing has become a cornerstone in microbiology research. To reliably detect the members, or operational taxonomic units (OTUs), that make up bacterial communities, taxonomic surveys rely on the use of the most informative PCR primers to amplify the broad range of phylotypes present in up-to-date reference databases. However, primers specific for the domain Bacteria were often developed some time ago against database versions that are now out of date...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28398197/emergence-and-evolution-of-an-interaction-between-intrinsically-disordered-proteins
#16
Greta Hultqvist, Emma Åberg, Carlo Camilloni, Gustav N Sundell, Eva Andersson, Jakob Dogan, Celestine N Chi, Michele Vendruscolo, Per Jemth
Protein-protein interactions involving intrinsically disordered proteins are important for cellular function and common in all organisms. However, it is not clear how such interactions emerge and evolve on a molecular level. We performed phylogenetic reconstruction, resurrection and biophysical characterization of two interacting disordered protein domains, CID and NCBD. CID appeared after the divergence of protostomes and deuterostomes 450-600 million years ago, while NCBD was present in the protostome/deuterostome ancestor...
April 11, 2017: ELife
https://www.readbyqxmd.com/read/28398054/molecular-dynamics-in-the-crystalline-regions-of-poly-ethylene-oxide-containing-a-well-defined-point-defect-in-the-middle-of-the-polymer-chain
#17
Yury Golitsyn, Martin Pulst, Jörg Kressler, Detlef Reichert
The chain mobility in crystals of a homopolymer of poly(ethylene oxide) (PEO) with 22 monomer units (PEO22) is compared with that of a PEO having the identical number of monomer units but additionally a 1,4-disubstituted 1,2,3-triazole (TR) point defect in the middle of the chain (PEO11-TR-PEO11). In crystals of PEO22, the characteristic αc-relaxation (helix jumps) is detected and the activation energy of this process is calculated from the pure crystalline (1)H FIDs to 67 kJ/mol. PEO11-TR-PEO11 exhibits a more complex behavior, i...
April 20, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28394620/photo-induced-micropattern-alignment-of-semiconductor-nanorods-with-polarized-emission-in-a-liquid-crystal-polymer-matrix
#18
Julian Schneider, Wanlong Zhang, Abhishek K Srivastava, Vladimir G Chigrinov, Hoi S Kwok, Andrey L Rogach
Photo-alignment technology provides high alignment quality with an exceptional control over the local director of liquid crystals. Due to the reorientation ability of sulfonic azo dye molecules, they offer high azimuthal and polar anchoring energy with a low pretilt angle for the orientation of liquid crystals and liquid crystal composites. In this work, we make use of this approach to align thin film composites of light-emitting semiconductor nanorods dispersed in a liquid crystal polymer into both one-dimensional and two-dimensional micro-scale patterns...
April 10, 2017: Nano Letters
https://www.readbyqxmd.com/read/28389532/rna-binding-proteins-with-prion-like-domains-in-health-and-disease
#19
REVIEW
Alice Ford Harrison, James Shorter
Approximately 70 human RNA-binding proteins (RBPs) contain a prion-like domain (PrLD). PrLDs are low-complexity domains that possess a similar amino acid composition to prion domains in yeast, which enable several proteins, including Sup35 and Rnq1, to form infectious conformers, termed prions. In humans, PrLDs contribute to RBP function and enable RBPs to undergo liquid-liquid phase transitions that underlie the biogenesis of various membraneless organelles. However, this activity appears to render RBPs prone to misfolding and aggregation connected to neurodegenerative disease...
April 7, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28384912/assessment-of-autonomic-dysfunction-in-acute-stroke-patients-at-a-tertiary-care-hospital
#20
Hemachandrika Chidambaram, Kothai Gnanamoorthy, Prasanna Karthik Suthakaran, Kannan Rajendran, Chitrambalam Pavadai
INTRODUCTION: In patients who present with acute cerebro-vascular disease, autonomic function testing is usually not given its due importance. This is because of the complex nature of the autonomic function tests and the relative technical difficulty faced in administering the tests to the patients. A simple and non-invasive method to assess the autonomic dysfunction is measurement of resting Heart Rate Variability (HRV). AIM: To study the pattern of autonomic dysfunction among patients admitted with acute stroke and to study the relationship between autonomic dysfunction and the morbidity and mortality associated with acute stroke...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
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