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https://www.readbyqxmd.com/read/29668002/a-sharp-edge-based-acoustofluidic-chemical-signal-generator
#1
Po-Hsun Huang, Chung Yu Chan, Peng Li, Yuqi Wang, Nitesh Nama, Hunter Bachman, Tony Jun Huang
Resolving the temporal dynamics of cell signaling pathways is essential for regulating numerous downstream functions, from gene expression to cellular responses. Mapping these signaling pathways requires the exposure of cells to time-varying chemical signals; these are difficult to generate and control over a wide temporal range. Herein, we present an acoustofluidic chemical signal generator based on a sharp-edge-based micromixing strategy. The device, simply by modulating the driving signals of an acoustic transducer including the ON/OFF switching frequency, actuation time and duty cycle, is capable of generating both single-pulse and periodic chemical signals that are temporally controllable in terms of stimulation period, stimulation duration and duty cycle...
April 18, 2018: Lab on a Chip
https://www.readbyqxmd.com/read/29667908/the-macula-densa-prorenin-receptor-is-essential-in-renin-release-and-blood-pressure-control
#2
Anne D M Riquier-Brison, Arnold Sipos, Ágnes Prókai, Sarah L Vargas, Ildiko Toma, Elliott J Meer, Karie G Villanueva, Jennifer C M Chen, Georgina Gyarmati, Christopher Yih, Elaine Tang, Bahram Nadim, Sujith Pendekanti, Ingrid M Garrelds, Genevieve Nguyen, A H Jan Danser, Janos Peti-Peterdi
The prorenin receptor (PRR) was originally proposed to be a member of the renin-angiotensin system (RAS), however recent work questioned their association. The present paper describes a functional link between the PRR and RAS in the renal juxtaglomerular apparatus (JGA), a classic anatomical site of the RAS. PRR expression was found in the sensory cells of the JGA, the macula densa (MD), and immunohistochemistry localized PRR to the MD basolateral cell membrane in mouse, rat, and human kidneys. MD cell PRR activation led to MAP kinase ERK1/2 signaling and stimulation of PGE2 release, the classic pathway of MD-mediated renin release...
April 18, 2018: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29667836/molecular-dynamics-simulations-are-redefining-our-view-of-peptides-interacting-with-biological-membranes
#3
Jakob P Ulmschneider, Martin B Ulmschneider
Ever since the first molecular mechanics computer simulations of biological molecules became possible, there has been the dream to study all complex biological phenomena in silico, simply bypassing the enormous experimental challenges and their associated costs. For this, two inherent requirements need to be met: First, the time scales achievable in simulations must reach up to the millisecond range and even longer. Second, the computational model must accurately reproduce what is measured experimentally. Despite some recent successes, the general consensus in the field to date has been that neither of these conditions have yet been met and that the dream will be realized, if at all, only in the distant future...
April 18, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29667753/mapping-innate-and-adaptive-immune-function-in-arbovirus-infections
#4
EDITORIAL
Daniel M Altmann
No abstract text is available yet for this article.
May 2018: Immunology
https://www.readbyqxmd.com/read/29667725/parent-centered-communication-at-time-of-pediatric-cancer-diagnosis-a-systematic-review
#5
REVIEW
Cristiana Hentea, Erika R Cheng, Nerissa S Bauer, Emily L Mueller
There are limited data focused on parental communication needs surrounding the time when a child is diagnosed with cancer. In this systematic review, we synthesized current literature on communication preferences of parents at the time of their child's diagnosis of cancer. We identified 16 studies that yielded 4 major themes parents recognized as important: communication style, content, logistics, and healthcare team. We further identified several concepts that inform parent-centered communication practice...
April 18, 2018: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/29667598/a-random-phased-array-for-mr-guided-transcranial-ultrasound-neuromodulation-in-non-human-primates
#6
Vandiver Chaplin, Marshal A Phipps, Charles F Caskey
Transcranial focused ultrasound (FUS) is a non-invasive technique for therapy and study of brain neural activation. Here we report on the design and characterization of a new MR-guided FUS transducer for neuromodulation in non-human primates at 650 kHz. The array is randomized with 128 elements 6.6 mm in diameter, radius of curvature 7.2 cm, opening diameter 10.3 cm (focal ratio 0.7), and 46% coverage. Simulations were used to optimize transducer geometry with respect to focus size, grating lobes, and directivity...
April 18, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29667440/time-use-and-physical-activity-in-a-specialised-brain-injury-rehabilitation-unit-an-observational-study
#7
Leanne Hassett, Siobhan Wong, Emma Sheaves, Maysaa Daher, Andrew Grady, Cara Egan, Carol Seeto, Talia Hosking, Anne Moseley
OBJECTIVES: To determine what is the use of time and physical activity in people undertaking inpatient rehabilitation in a specialised brain injury unit. To determine participants' level of independence related to the use of time and physical activity. METHODS: Design: Cross-sectional observation study. PARTICIPANTS: Fourteen people [mean (SD) age 40 (15) years] with brain injuries undertaking inpatient rehabilitation. PROCEDURE: Participants were observed every 12 minutes over 5 days (Monday to Friday from 7:30 am until 7:30 pm) using a behaviour mapping tool...
April 18, 2018: Brain Injury: [BI]
https://www.readbyqxmd.com/read/29667432/identification-and-characterisation-of-micrornas-and-piwi-interacting-rnas-in-cockerels-spermatozoa-by-solexa-sequencing
#8
Shengru Wu, Jiacheng Guo, Liqin Zhu, Jiantao Yang, Si Chen, Xiaojun Yang
1. There has been substantial research focused on the roles of microRNAs (miRNA) and PIWI-interacting RNAs (piRNA) delivered from mammalian spermatozoa, however comparatively little is known about the role of spermatozoa-delivered miRNAs and piRNAs within breeding cockerels' spermatozoa. 2. A small RNA library of cockerels' spermatozoa was constructed using Illumina high-throughput sequencing technology. Unique sequences with lengths of 18-26 nucleotides were mapped to miRBase 21.0 and unique sequences with lengths of 25-37 nucleotides were mapped to a piRNA database...
April 18, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29667428/optical-coherence-tomography-angiography-characterization-of-acute-and-late-stage-purtscher-retinopathy
#9
Pedro Gil, Miguel Raimundo, João P Marques, João Póvoa, Rufino Silva
PURPOSE: To report a case of Purtscher retinopathy imaged with optical coherence tomography angiography. METHODS: Case-report. Left eye fundoscopic examination in a 21-year old male after a road traffic accident with chest compression revealed multiple peri-papillary cotton-wool spots and intra- and pre-retinal hemorrhages. A diagnosis of Purtscher retinopathy was assumed. RESULTS: In both the superficial and deep retinal plexuses, acute stage optical coherence tomography angiography identified multiple irregular areas of capillary non-perfusion that extended beyond the clinically visible peri-papillary cotton-wool spots...
April 1, 2018: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/29667329/performance-of-amplicon-and-shotgun-sequencing-for-accurate-biomass-estimation-in-invertebrate-community-samples
#10
Iliana Bista, Gary R Carvalho, Min Tang, Kerry Walsh, Xin Zhou, Mehrdad Hajibabaei, Shadi Shokralla, Mathew Seymour, David Bradley, Shanlin Liu, Martin Christmas, Simon Creer
New applications of DNA and RNA sequencing are expanding the field of biodiversity discovery and ecological monitoring, yet questions remain regarding precision and efficiency. Due to primer bias, the ability of metabarcoding to accurately depict biomass of different taxa from bulk communities remains unclear, while PCR-free whole mitochondrial genome (mitogenome) sequencing may provide a more reliable alternative. Here we used a set of documented mock communities comprising 13 species of freshwater macroinvertebrates of estimated individual biomass, to compare the detection efficiency of COI metabarcoding (3 different amplicons) and shotgun mitogenome sequencing...
April 18, 2018: Molecular Ecology Resources
https://www.readbyqxmd.com/read/29667235/contrast-enhanced-computed-tomography-cect-attenuation-is-associated-with-stiffness-of-intact-knee-cartilage
#11
Reza Nickmanesh, Rachel C Stewart, Brian D Snyder, Mark W Grinstaff, Bassam A Masri, David R Wilson
Contrast-enhanced computed tomography (CECT) using charged contrast-agents enables quantification of cartilage glycosaminoglycan content. Since glycosaminoglycan content is a key determinant of cartilage compressive stiffness, CECT measurements have the potential to non-invasively assess cartilage stiffness. The objective of this study was to determine whether CECT attenuation, using a cationic contrast-agent (CA4 +), correlates with the stiffness of intact cartilage. Six fresh femoral and six fresh tibial compartments with intact cartilage were obtained from patients undergoing total knee replacement surgery...
April 17, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29667208/the-use-of-cardiac-ct-alone-to-exclude-left-atrial-thrombus-before-atrial-fibrillation-ablation-efficiency-safety-and-cost-analysis
#12
Wassim Mosleh, Ali Sheikh, Zaid Said, Mohamed A Abdel-Aal, Siri Gadde, Tanvi Shah, Michael F Wilson, Hiroko Beck, Chee Kim, Umesh C Sharma
BACKGROUND: Atrial fibrillation (AF) is a growing financial burden on the healthcare system. Cardiac computed tomographic angiography (CCTA) is needed for pulmonary vein mapping before AF ablation (AFA). CCTA has shown to be an alternative to transesophageal echocardiogram (TEE) to rule-out left atrial appendage thrombus (LAAT) pre-AFA. We aim to examine the safety, cost-effectiveness, and time-efficiency of utilizing CCTA alone to rule out LAAT before AFA. METHODS: We prospectively screened patients with paroxysmal AF undergoing cryoablation...
April 17, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29667172/mapping-the-origins-of-imperial-roman-workers-1st-4th-century-ce-at-vagnari-southern-italy-using-87-sr-86-sr-and-%C3%AE-18-o-variability
#13
Matthew V Emery, Robert J Stark, Tyler J Murchie, Spencer Elford, Henry P Schwarcz, Tracy L Prowse
OBJECTIVES: We obtained the oxygen and strontium isotope composition of teeth from Roman period (1st to 4th century CE) inhabitants buried in the Vagnari cemetery (Southern Italy), and present the first strontium isotope variation map of the Italian peninsula using previously published data sets and new strontium data. We test the hypothesis that the Vagnari population was predominantly composed of local individuals, instead of migrants originating from abroad. MATERIALS AND METHODS: We analyzed the oxygen (18 O/16 O) and strontium (87 Sr/86 Sr) isotope composition of 43 teeth...
April 18, 2018: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/29667034/thermal-comfort-along-the-marathon-course-of-the-2020-tokyo-olympics
#14
Tsuyoshi Honjo, Yuhwan Seo, Yudai Yamasaki, Nobumitsu Tsunematsu, Hitoshi Yokoyama, Hiroaki Yamato, Takehiko Mikami
The Olympic Games will be held in Tokyo in 2020 and the period will be the hottest period of the year in Japan. Marathon is a sport with a large heat load, and it is said that the risk of heat stroke rises more than other sports activities. The thermal environment of the 2020 Tokyo Olympic marathon course is analyzed by using wet-bulb globe temperature (WBGT) and Universal Thermal Climate Index (UTCI) map of the center area of Tokyo. The change due to the place, the effect of the shadow of the building, and the position on the course was analyzed from the distribution of WBGT and UTCI in the short-term analysis of sunny day from August 2 to August 6, 2014...
April 17, 2018: International Journal of Biometeorology
https://www.readbyqxmd.com/read/29666996/comparison-of-t2-relaxation-values-in-subtalar-cartilage-between-patients-with-lateral-instability-of-the-ankle-joint-and-healthy-volunteers
#15
Hyun Su Kim, Young Cheol Yoon, Ki Sun Sung, Min-Ji Kim, Soohyun Ahn
PURPOSE: To evaluate the difference between T2 relaxation values of the subtalar cartilage in lateral ankle instability patients and healthy volunteers. MATERIALS AND METHODS: This institutional review board-approved study included 27 preoperative magnetic resonance imaging (MRI) examinations of 26 patients who underwent Broström operations. Data of previously enrolled healthy volunteers (12 volunteers, 13 MRIs) were used as controls. Two radiologists independently measured T2 values in eight posterior subtalar joint cartilage compartments: central calcaneus anterior (CCA) and posterior (CCP), central talus anterior (CTA) and posterior (CTP), lateral calcaneus anterior (LCA) and posterior (LCP), and lateral talus anterior (LTA) and posterior (LTP)...
April 17, 2018: European Radiology
https://www.readbyqxmd.com/read/29666993/non-contrast-enhanced-magnetic-resonance-angiography-a-reliable-clinical-tool-for-evaluating-transplant-renal-artery-stenosis
#16
Long Jiang Zhang, Jin Peng, Jiqiu Wen, U Joseph Schoepf, Akos Varga-Szemes, L Parkwood Griffith, Yuan Meng Yu, Shu Min Tao, Yan Jun Li, Xue Feng Ni, Jian Xu, Dong Hong Shi, Guang Ming Lu
PURPOSE: To evaluate image quality of non-contrast-enhanced magnetic resonance angiography (MRA) and compare transplant renal artery stenosis (TRAS) seen by non-contrast-enhanced MRA with digital subtraction angiography (DSA) as the gold standard. MATERIALS AND METHODS: 330 patients receiving 369 non-contrast-enhanced MRA examinations from July 2014 to June 2017 were included. Thirty patients received at least two MRA examinations. Image quality was independently assessed by two radiologists...
April 17, 2018: European Radiology
https://www.readbyqxmd.com/read/29666952/utility-of-diffusion-weighted-mr-imaging-in-the-diagnosis-of-placenta-accreta-spectrum-abnormality
#17
Bhagya Sannananja, Anna Ellermeier, Daniel S Hippe, Thomas C Winter, Stella K Kang, Susanna I Lee, Mark R Kilgore, Manjiri K Dighe
PURPOSE: The aim of this study was to evaluate the utility of added DWI sequences as an adjunct to traditional MR imaging in the evaluation of abnormal placentation in patients with suspicion for placenta accreta spectrum abnormality or morbidly adherent placenta (MAP). MATERIALS AND METHODS: The study was approved by local ethics committee. The subjects included pregnant women with prenatal MRI performed between July 2013 to July 2015. All imaging was performed on a Philips 1...
April 17, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29666910/ontogeny-and-development-of-the-tritocerebral-commissure-giant-tcg-an-identified-neuron-in-the-brain-of-the-grasshopper-schistocerca-gregaria
#18
George Stephen Boyan, Leslie Williams, Tobias Müller, Jonathan P Bacon
The tritocerebral commissure giant (TCG) of the grasshopper Schistocerca gregaria is one of the best anatomically and physiologically described arthropod brain neurons. A member of the so-called Ventral Giant cluster of cells, it integrates sensory information from visual, antennal and hair receptors, and synapses with thoracic motor neurons in order to initiate and regulate flight behavior. Its ontogeny, however, remains unclear. In this study, we use bromodeoxyuridine incorporation and cyclin labeling to reveal proliferative neuroblasts in the region of the embryonic brain where the ventral giant cluster is located...
April 17, 2018: Development Genes and Evolution
https://www.readbyqxmd.com/read/29666883/snp-based-pool-genotyping-and-haplotype-analysis-accelerate-fine-mapping-of-the-wheat-genomic-region-containing-stripe-rust-resistance-gene-yr26
#19
Jianhui Wu, Qingdong Zeng, Qilin Wang, Shengjie Liu, Shizhou Yu, Jingmei Mu, Shuo Huang, Hanan Sela, Assaf Distelfeld, Lili Huang, Dejun Han, Zhensheng Kang
NGS-assisted super pooling emerging as powerful tool to accelerate gene mapping and haplotype association analysis within target region uncovering specific linkage SNPs or alleles for marker-assisted gene pyramiding. Conventional gene mapping methods to identify genes associated with important agronomic traits require significant amounts of financial support and time. Here, a single nucleotide polymorphism (SNP)-based mapping approach, RNA-Seq and SNP array assisted super pooling analysis, was used for rapid mining of a candidate genomic region for stripe rust resistance gene Yr26 that has been widely used in wheat breeding programs in China...
April 17, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29666871/harmonic-analysis-of-surface-instability-patterns-on-colloidal-particles
#20
Tero Kämäräinen, Mariko Ago, Jani Seitsonen, Janne Raula, Esko I Kauppinen, Janne Ruokolainen, Orlando J Rojas
Wrinkling of colloidal particles alter a wide variety of interfacial properties but quantitative topographical descriptions have been explored experimentally to a very limited extent. In this study, we present a harmonic analysis of surface wrinkles and folds on submicron colloidal particles, obtained using an aerosol flow route, with small radius (<300 nm) and high crust thickness-to-radius ratio (>0.1). The particle surface coordinates were mapped in their entirety using cryo-electron tomography and subsequently reconstructed using spherical harmonics, allowing a spectral topographical description of the instability patterns and the identification of their surface modes by lateral wavelength...
April 18, 2018: Soft Matter
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