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https://www.readbyqxmd.com/read/29668141/-prevalence-and-risk-factors-associated-to-tuberculosis-and-non-tuberculous-mycobacterial-infections-in-hiv-positive-patients-in-bogot%C3%A3
#1
Magda Beltrán-León, Francy Pérez-Llanos, Liliana Sánchez, Carlos Parra-López, Myriam Navarrete, Ricardo Sánchez, Carlos Awad, Ana María Granada, Edgardo Quintero, Óscar Briceño, Óscar Cruz, Martha Isabel Murcia
INTRODUCTION: Tuberculosis is one of the most widely distributed infectious diseases worldwide. It is the most common cause of mortality among AIDS patients. In Colombia, 12,918 tuberculosis cases were notified, and 926 deaths were reported in 2015. OBJECTIVE: To determine the prevalence and risk factors associated to mycobacterial infections in HIVpositive patients in two public hospitals from Bogotá. MATERIALS AND METHODS: A prospective and descriptive study was carried out by an active search for tuberculosis cases and non-tuberculous mycobacterial infections in HIV-positive patients...
March 15, 2018: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/29667686/rheological-characterization-of-dynamic-remodeling-of-the-pericellular-region-by-human-mesenchymal-stem-cell-secreted-enzymes-in-well-defined-synthetic-hydrogel-scaffolds
#2
Maryam Daviran, Sarah M Longwill, Jonah F Casella, Kelly M Schultz
Human mesenchymal stem cells (hMSCs) dynamically remodel their microenvironment during basic processes, such as migration and differentiation. Migration requires extracellular matrix invasion, necessitating dynamic cell-material interactions. Understanding these interactions is critical to advancing materials designs that harness and manipulate these processes for applications including wound healing and tissue regeneration. In this work, we encapsulate hMSCs in a cell-degradable poly(ethylene glycol)-peptide hydrogel to determine how cell-secreted enzymes, specifically matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs), create unique pericellular microenvironments...
April 18, 2018: Soft Matter
https://www.readbyqxmd.com/read/29667657/unrivalled-diversity-the-many-roles-and-reactions-of-bacterial-cytochromes-p450-in-secondary-metabolism
#3
REVIEW
Anja Greule, Jeanette E Stok, James J De Voss, Max J Cryle
Covering: 2000 up to 2018The cytochromes P450 (P450s) are a superfamily of heme-containing monooxygenases that perform diverse catalytic roles in many species, including bacteria. The P450 superfamily is widely known for the hydroxylation of unactivated C-H bonds, but the diversity of reactions that P450s can perform vastly exceeds this undoubtedly impressive chemical transformation. Within bacteria, P450s play important roles in many biosynthetic and biodegradative processes that span a wide range of secondary metabolite pathways and present diverse chemical transformations...
April 18, 2018: Natural Product Reports
https://www.readbyqxmd.com/read/29667606/applying-a-new-computer-aided-detection-scheme-generated-imaging-marker-to-predict-short-term-breast-cancer-risk
#4
Seyedehnafiseh Mirniaharikandehei, Alan B Hollingsworth, Bhavika Patel, Morteza Heidari, Hong Liu, Bin Zheng
This study aims to investigate the feasibility of identifying a new quantitative imaging marker based on false-positives generated by computer-aided detection (CAD) scheme to help predict short-term breast cancer risk. An image dataset including four view mammograms acquired from 1,044 women was retrospectively assembled. All mammograms were originally interpreted as negative by radiologists. In the next subsequent mammography screening, 402 women were diagnosed with breast cancer and 642 remained negative...
April 18, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29667528/speech-and-language-therapists-views-about-aac-system-acceptance-by-people-with-acquired-communication-disorders
#5
Eliada Pampoulou
OBJECTIVE: Some adults with acquired communication disorders are faced with an inability to communicate coherently through verbal speech with their communication partners. Despite the fact that a variety of augmentative and alternative communication (AAC) aided systems is available to assist them in communicating, not all adults accept them. In Cyprus, there is scant research focusing on the factors that are linked to AAC system acceptance and abandonment. METHODS: To address this gap, this research involves exploring the experiences of six speech and language therapists supporting adults with acquired communication disorders, who could benefit from the use of AAC systems...
April 18, 2018: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/29667370/systems-toxicology-approach-to-identifying-paracetamol-overdose
#6
Chantelle L Mason, Joseph Leedale, Sotiris Tasoulis, Ian Jarman, Daniel J Antoine, Steven D Webb
Paracetamol (acetaminophen (APAP)) is one of the most commonly used analgesics in the United Kingdom and the United States. However, exceeding the maximum recommended dose can cause serious liver injury and even death. Promising APAP toxicity biomarkers are thought to add value to those used currently and clarification of the functional relationships between these biomarkers and liver injury would aid clinical implementation of an improved APAP toxicity identification framework. The framework currently used to define an APAP overdose is highly dependent upon time since ingestion and initial dose; information that is often highly unpredictable...
April 18, 2018: CPT: Pharmacometrics & Systems Pharmacology
https://www.readbyqxmd.com/read/29667359/predicting-responses-to-mechanical-ventilation-for-preterm-infants-with-acute-respiratory-illness-using-artificial-neural-networks
#7
Katharine Brigham, Samir Gupta, John C Brigham
Infants born prematurely are particularly susceptible to respiratory illness due to underdeveloped lungs, which can often result in fatality. Preterm infants in acute stages of respiratory illness typically require mechanical ventilation assistance, and the efficacy of the type of mechanical ventilation and its delivery has been the subject of a number clinical studies. With recent advances in machine learning approaches, particularly deep learning, it may be possible to estimate future responses to mechanical ventilation in real-time, based on ventilation monitoring up to the point of analysis...
April 17, 2018: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/29667336/optimal-breastfeeding-durations-for-hiv-exposed-infants-the-impact-of-maternal-art-use-infant-mortality-and-replacement-feeding-risk
#8
Divya Mallampati, Rachel L MacLean, Roger Shapiro, Francois Dabis, Barbara Engelsmann, Kenneth A Freedberg, Valeriane Leroy, Shahin Lockman, Rochelle Walensky, Nigel Rollins, Andrea Ciaranello
INTRODUCTION: In 2010, the WHO recommended women living with HIV breastfeed for 12 months while taking antiretroviral therapy (ART) to balance breastfeeding benefits against HIV transmission risks. To inform the 2016 WHO guidelines, we updated prior research on the impact of breastfeeding duration on HIV-free infant survival (HFS) by incorporating maternal ART duration, infant/child mortality and mother-to-child transmission data. METHODS: Using the Cost-Effectiveness of Preventing AIDS Complications (CEPAC)-Infant model, we simulated the impact of breastfeeding duration on 24-month HFS among HIV-exposed, uninfected infants...
April 2018: Journal of the International AIDS Society
https://www.readbyqxmd.com/read/29667318/physicochemical-property-guidelines-for-modern-agrochemicals
#9
Yu Zhang, Beth Lorsbach, Scott Castetter, William T Lambert, Jeremy Kister, Nick X Wang, Carla Klittich, Joshua Roth, Thomas C Sparks, Mike R Loso
The relentless need for the discovery and development of new agrochemicals continues due to driving forces such as loss of existing products through the development of resistance, the necessity for products with more favorable environmental and toxicological profiles, shifting pest spectra, and the changing agricultural needs and practices of the farming community. These new challenges underscore the demand for novel, high quality starting points to accelerate the discovery of new agrochemicals that address market challenges...
April 17, 2018: Pest Management Science
https://www.readbyqxmd.com/read/29667243/a-biopolymer-heparin-sodium-interlayer-anchoring-tio-2-and-mapbi-3-enhances-trap-passivation-and-device-stability-in-perovskite-solar-cells
#10
Shuai You, Hui Wang, Shiqing Bi, Jiyu Zhou, Liang Qin, Xiaohui Qiu, Zhiqiang Zhao, Yun Xu, Yuan Zhang, Xinghua Shi, Huiqiong Zhou, Zhiyong Tang
Traps in the photoactive layer or interface can critically influence photovoltaic device characteristics and stabilities. Here, traps passivation and retardation on device degradation for methylammonium lead trihalide (MAPbI3 ) perovskite solar cells enabled by a biopolymer heparin sodium (HS) interfacial layer is investigated. The incorporated HS boosts the power conversion efficiency from 17.2 to 20.1% with suppressed hysteresis and Shockley-Read-Hall recombination, which originates primarily from the passivation of traps near the interface between the perovskites and the TiO2 cathode...
April 18, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29667103/a-healthy-lifestyle-index-and-its-association-with-risk-of-breast-endometrial-and-ovarian-cancer-among-canadian-women
#11
Rhonda Arthur, Victoria A Kirsh, Nancy Kreiger, Thomas Rohan
PURPOSE: Several modifiable risk factors have been associated with risk of female cancers, but there is limited data regarding their combined effect on risk among Canadian women. Therefore, we assessed the joint association of modifiable risk factors, using a healthy lifestyle index (HLI) score, with risk of specific reproductive cancers. METHOD: This study included a subcohort of 3,185 of the 39,618 women, who participated in the Canadian Study of Diet, Lifestyle, and Health, and in whom 410, 177, and 100 postmenopausal breast, endometrial, and ovarian cancers, respectively, were ascertained...
April 17, 2018: Cancer Causes & Control: CCC
https://www.readbyqxmd.com/read/29667004/the-development-of-hiv-vaccines-targeting-gp41-membrane-proximal-external-region-mper-challenges-and-prospects
#12
REVIEW
Huan Liu, Xiaojie Su, Lulu Si, Lu Lu, Shibo Jiang
A human immunodeficiency virus type-1 (HIV-1) vaccine which is able to effectively prevent infection would be the most powerful method of extinguishing pandemic of the acquired immunodeficiency syndrome (AIDS). Yet, achieving such vaccine remains great challenges. The membrane-proximal external region (MPER) is a highly conserved region of the envelope glycoprotein (Env) gp41 subunit near the viral envelope surface, and it plays a key role in membrane fusion. It is also the target of some reported broadly neutralizing antibodies (bNAbs)...
April 17, 2018: Protein & Cell
https://www.readbyqxmd.com/read/29666859/dynamical-modes-of-two-almost-identical-chemical-oscillators-connected-via-both-pulsatile-and-diffusive-coupling
#13
Dmitry A Safonov, Vladimir K Vanag
The dynamical regimes of two almost identical Belousov-Zhabotinsky oscillators with both pulsatile (with time delay) and diffusive coupling have been studied theoretically with the aid of ordinary differential equations for four combinations of these types of coupling: inhibitory diffusive and inhibitory pulsatile (IDIP); excitatory diffusive and inhibitory pulsatile; inhibitory diffusive and excitatory pulsatile; and finally, excitatory diffusive and excitatory pulsatile (EDEP). The combination of two types of coupling creates a condition for new feedback, which promotes new dynamical modes for the IDIP and EDEP coupling...
April 18, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29666787/cardiac-output-monitoring-in-preterm-infants
#14
REVIEW
Matthew McGovern, Jan Miletin
Maintaining optimal circulatory status is a key component of preterm neonatal care. Low-cardiac output (CO) in the preterm neonate leads to inadequate perfusion of vital organs and has been linked to a variety of adverse outcomes with heightened acute morbidity and mortality and adverse neurodevelopmental outcomes. Having technology available to monitor CO allows us to detect low-output states and potentially intervene to mitigate the unwanted effects of reduced organ perfusion. There are many technologies available for the monitoring of CO in the preterm neonatal population and while many act as useful adjuncts to aid clinical decision-making no technique is perfect...
2018: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/29666630/the-interactomic-analysis-reveals-pathogenic-protein-networks-in-phomopsis-longicolla-underlying-seed-decay-of-soybean
#15
Shuxian Li, Bryan Musungu, David Lightfoot, Pingsheng Ji
Phomopsis longicolla T. W. Hobbs (syn. Diaporthe longicolla ) is the primary cause of Phomopsis seed decay (PSD) in soybean, Glycine max (L.) Merrill. This disease results in poor seed quality and is one of the most economically important seed diseases in soybean. The objectives of this study were to infer protein-protein interactions (PPI) and to identify conserved global networks and pathogenicity subnetworks in P. longicolla including orthologous pathways for cell signaling and pathogenesis. The interlog method used in the study identified 215,255 unique PPIs among 3,868 proteins...
2018: Frontiers in Genetics
https://www.readbyqxmd.com/read/29666625/dying-to-be-noticed-epigenetic-regulation-of-immunogenic-cell-death-for-cancer-immunotherapy
#16
REVIEW
Brianne Cruickshank, Michael Giacomantonio, Paola Marcato, Sherri McFarland, Jonathan Pol, Shashi Gujar
Immunogenic cell death (ICD) activates both innate and adaptive arms of the immune system during apoptotic cancer cell death. With respect to cancer immunotherapy, the process of ICD elicits enhanced adjuvanticity and antigenicity from dying cancer cells and consequently, promotes the development of clinically desired antitumor immunity. Cancer ICD requires the presentation of various "hallmarks" of immunomodulation, which include the cell-surface translocation of calreticulin, production of type I interferons, and release of high-mobility group box-1 and ATP, which through their compatible actions induce an immune response against cancer cells...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29666600/the-temporal-prediction-of-stress-in-speech-and-its-relation-to-musical-beat-perception
#17
REVIEW
Eleonora J Beier, Fernanda Ferreira
While rhythmic expectancies are thought to be at the base of beat perception in music, the extent to which stress patterns in speech are similarly represented and predicted during on-line language comprehension is debated. The temporal prediction of stress may be advantageous to speech processing, as stress patterns aid segmentation and mark new information in utterances. However, while linguistic stress patterns may be organized into hierarchical metrical structures similarly to musical meter, they do not typically present the same degree of periodicity...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29666542/development-of-gluten-free-fish-pseudoplatystoma-corruscans-patties-by-response-surface-methodology
#18
Mara C Romero, Ricardo A Fogar, Fabiana Rolhaiser, Verónica V Clavero, Ana M Romero, María A Judis
The goal of this study was to develop a fish-based product suitable for people with celiac disease. Water and gluten-free flours (rice, corn, amaranth or quinoa) were added to improve cooking yield, texture parameters and as an aid in improving quality attributes such as taste and juiciness. Cooking yields of patties containing gluten-free flours were higher than control and maximum values ranged between 91 and 93%. Hardness was higher in patties made with amaranth or quinoa flour, whereas cohesiveness and springiness were higher in patties made with corn and rice flour, respectively...
May 2018: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/29666292/human-immunodeficiency-virus-tat-protein-aids-v-region-somatic-hypermutation-in-human-b-cells
#19
Xiaohua Wang, Zhi Duan, Guojun Yu, Manxia Fan, Matthew D Scharff
Long-term survivors of human immunodeficiency virus (HIV) infection have been shown to have a greatly increased incidence of B cell lymphomas. This increased lymphomagenesis suggests some link between HIV infection and the destabilization of the host B cell genome, a phenomenon also suggested by the extraordinary high frequency of mutation, insertion, and deletion in the broadly neutralizing HIV antibodies. Since HIV does not infect B cells, the molecular mechanisms of this genomic instability remain to be fully defined...
April 17, 2018: MBio
https://www.readbyqxmd.com/read/29666181/accuracy-of-image-guided-percutaneous-injection-into-a-phantom-spinal-cord-utilizing-flat-panel-detector-ct-with-mr-fusion-and-integrated-navigational-software
#20
Jason F Talbott, Daniel L Cooke, Marc C Mabray, Paul S Larson, Matthew R Amans, Steven W Hetts, Mark W Wilson, Terilyn Moore, Ernesto A Salegio
PURPOSE: To evaluate the accuracy of percutaneous fluoroscopic injection into the spinal cord of a spine phantom utilizing integrated navigational guidance from fused flat panel detector CT (FDCT) and MR datasets. Conventional and convection-enhanced delivery (CED) techniques were evaluated. MATERIALS AND METHODS: FDCT and MR datasets of a swine thoracic spine phantom were co-registered using an integrated guidance system and surface to spinal cord target trajectory planning was performed on the fused images...
April 17, 2018: Journal of Neurointerventional Surgery
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