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https://www.readbyqxmd.com/read/29449809/digging-into-lipid-membrane-permeation-for-cardiac-ion-channel-blocker-d-sotalol-with-all-atom-simulations
#1
Kevin R DeMarco, Slava Bekker, Colleen E Clancy, Sergei Y Noskov, Igor Vorobyov
Interactions of drug molecules with lipid membranes play crucial role in their accessibility of cellular targets and can be an important predictor of their therapeutic and safety profiles. Very little is known about spatial localization of various drugs in the lipid bilayers, their active form (ionization state) or translocation rates and therefore potency to bind to different sites in membrane proteins. All-atom molecular simulations may help to map drug partitioning kinetics and thermodynamics, thus providing in-depth assessment of drug lipophilicity...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29447720/no-257-ultrasonographic-cervical-length-assessment-in-predicting-preterm-birth-in-singleton-pregnancies
#2
Kenneth Lim, Kimberly Butt, Joan M Crane
OBJECTIVES: To review (1) the use of ultrasonographic-derived cervical length measurement in predicting preterm birth and (2) interventions associated with a short cervical length. OUTCOMES: Reduction in rates of prematurity and/or better identification of those at risk, as well as possible prevention of unnecessary interventions. EVIDENCE: Published literature was retrieved through searches of PubMed and The Cochrane Library up to December 2009, using appropriate controlled vocabulary and key words (preterm labour, ultrasound, cervix, incompetent cervix, transvaginal, transperineal, cervical length, fibronectin)...
February 2018: Journal of Obstetrics and Gynaecology Canada: JOGC, Journal D'obstétrique et Gynécologie du Canada: JOGC
https://www.readbyqxmd.com/read/29447711/no-355-physiologic-basis-of-pain-in-labour-and-delivery-an-evidence-based-approach-to-its-management
#3
Julie Bonapace, Guy-Paul Gagné, Nils Chaillet, Raymonde Gagnon, Emmanuelle Hébert, Sarah Buckley
OBJECTIVE: To review the evidence relating to nonpharmacological approaches in the management of pain during labour and delivery. To formulate recommendations for the usage of nonpharmacological approaches to pain management. OPTIONS: Nonpharmacological methods available for pain management during labour and delivery exist. These should be included in the counselling and care of women. EVIDENCE: PubMed and Medline were searched for articles in French and English on subjects related to "breastfeeding," "pain," "epidural," "anaesthesia," "analgesia," "labour," "labor," and combined with "gate control theory," "alternative therapies," "massage," "position," "mobility," "TENS," "bathing," "DNIC," "acupuncture," "acupressure," "sterile water injection," "higher center," "control mind," "cognitive structuring," "holistic health," "complementary therapy(ies)," "breathing," "relaxation," "mental imagery," "visualization," "mind focusing," "hypnosis," "auto-hypnosis," "sophrology," "mind and body interventions," "music," "odors," "biofeedback," "Lamaze," "Bonapace," "prenatal training," "gymnastic," "chanting," "haptonomy," "environment," "transcutaneous electrical stimulus-stimulation," "antenatal education," "support," "continuous support," "psychosocial support," "psychosomatic medicine," "supportive care," "companion," "intrapartum care," "nurse," "midwife(ves)," "father," "doula," "caregiver," " hormones," "oxytocin," "endorphin," "prolactin," "catecholamine," "adrenaline," and "noradrenaline" from 1990 to December 2015...
February 2018: Journal of Obstetrics and Gynaecology Canada: JOGC, Journal D'obstétrique et Gynécologie du Canada: JOGC
https://www.readbyqxmd.com/read/29447123/fast-and-controlled-fabrication-of-porous-graphene-oxide-application-of-afm-tapping-for-mechano-chemistry
#4
Liangyong Chu, Alexander V Korobko, Marcel Bus, Bart Boshuizen, Ernst J R Sudhoelter, Nicolaas A M Besseling
This paper describes a novel method to fabricate porous graphene oxide (PGO) from GO by exposure to oxygen plasma. GO comprises of graphene domains and more polar, hydroxylated ones. When exposed to oxygen plasma, the different GO domains are etched with different rates. Compared to other methods to fabricate PGO described so far, e.g. the thermal etching method, our method is faster by a factor 102 -103. We studied the development of the porosity with exposure time using atomic force microscopy (AFM). Surprisingly, we found that the development of PGO upon oxygen-plasma exposure is influenced by tapping mode AFM scanning using a Si tip...
February 15, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29445103/mesoscopic-physical-removal-of-material-using-sliding-nano-diamond-contacts
#5
Umberto Celano, Feng-Chun Hsia, Danielle Vanhaeren, Kristof Paredis, Torbjörn E M Nordling, Josephus G Buijnsters, Thomas Hantschel, Wilfried Vandervorst
Wear mechanisms including fracture and plastic deformation at the nanoscale are central to understand sliding contacts. Recently, the combination of tip-induced material erosion with the sensing capability of secondary imaging modes of AFM, has enabled a slice-and-view tomographic technique named AFM tomography or Scalpel SPM. However, the elusive laws governing nanoscale wear and the large quantity of atoms involved in the tip-sample contact, require a dedicated mesoscale description to understand and model the tip-induced material removal...
February 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29444961/no-inferiority-of-tonbridge-thrombectomy-device-for-acute-thrombus-retrial-compared-with-solitaire-device-an-experimental-evaluation-with-a-canine-distal-external-carotid-maxillary-artery-occlusion-model
#6
Geng Zhou, Ming-Hua Li, Hai-Tao Lu, Jiang-Shan Deng, Yu-Wu Zhao, Yi Xiang J Wang, Yue-Qi Zhu
INTRODUCTION: Mechanical thrombectomy (MT) has been widely accepted as a safe and effective treatment for acute ischemic stroke (AIS). Development of stent retriever devices has been intensively developed over the past two decades. In this study, we compared the effectiveness and safety of a new thrombectomy device with Solitaire FR for the treatment of AIS models. METHODS: Mechanical performance of stent retrievers was tested in vitro. Thrombin-induced thrombus was pre-injected into the right distal external carotid-maxillary artery in 18 dogs to create an acute thrombus occlusion model, and these animals were divided into a Tonbridge group (n=9, with Tonbridge stent Tonbridge Medical Technology) and a Solitaire group as control (n=9, with Solitaire stent, ev3 Neurovascular)...
February 14, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29444538/-effects-of-judo-specific-resistance-training-on-kinetic-and-electromyographic-parameters-of-pulling-exercises-in-judo-athletes
#7
Norman Helm, Olaf Prieske, Thomas Muehlbauer, Tom Krüger, Urs Granacher
BACKGROUND: In judo, rapid force production during pulling movements is an important component of athletic performance, which is why this capacity needs to be specifically exercised in judo. This study aimed at examining the effects of a judo-specific resistance training program using a judo ergometer system (PTJ) versus a traditional resistance training regime using a partner (PTP) on kinetics and muscle activity of judo-specific pulling exercises. METHOD: Twenty-four male judo athletes (age: 22 ± 4 years, training experience: 15 ± 3 years) were randomly assigned to two groups...
February 14, 2018: Sportverletzung Sportschaden: Organ der Gesellschaft Für Orthopädisch-Traumatologische Sportmedizin
https://www.readbyqxmd.com/read/29443657/il-2-and-beyond-in-cancer-immunotherapy
#8
John M Wrangle, Alicia Patterson, C Bryce Johnson, Daniel J Neitzke, Shikhar Mehrotra, Chadrick E Denlinger, Chrystal M Paulos, Zihai Li, David J Cole, Mark P Rubinstein
The development of the T- and natural killer (NK) cell growth factor IL-2 has been a sentinel force ushering in the era of immunotherapy in cancer. With the advent of clinical grade recombinant IL-2 in the mid-1980s, oncologists could for the first time directly manipulate lymphocyte populations with systemic therapy. By itself, recombinant IL-2 can induce clinical responses in up to 15% of patients with metastatic cancer or renal cell carcinoma. When administered with adoptively transferred tumor-reactive lymphocytes, IL-2 promotes T cell engraftment and response rates of up to 50% in metastatic melanoma patients...
February 2018: Journal of Interferon & Cytokine Research
https://www.readbyqxmd.com/read/29442806/hetero-functionalized-gold-nanoparticles-to-silence-au-rich-element-containing-mrnas-in-rage-expressing-inflammatory-cells-preparation-characterization-and-in-vitro-evaluation
#9
Gokila Devi Mathialagan, Narkunaraja Shanmugam
Diabetes, a chronic metabolic disorder associated with significantly accelerated rates of inflammation. Gold nanoparticle plays a crucial role in biomedical applications. We described the development of hetero-functionalized gold nanoparticles (hfAuNPs) for targeted selective gene silencing by RNAi interference. This hfAuNPs was developed by parallelly conjugating biotinylated ARE-siRNA (siRNA to Adenosine Uridine-rich elements) and biotinylated RAGE interacting-peptide (RIP) to streptavidin coated gold nanoparticles (aAuNPs) thus forms a complex that provides biocompatibility and functionality in a physiological environment...
May 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29442451/application-of-an-anionic-polymer-in-the-formulation-of-floating-tablets-containing-an-alkaline-model-drug
#10
Dorota Wójcik-Pastuszka, Iwona Golonka, Andrzej Drys, Jobst B Mielck, Maria Twarda, Witold Musiał
BACKGROUND: Gastric residence time is the key factor affecting the bioavailability of active pharmaceutical ingredients absorbed mainly through the gastric mucous membrane and influencing the local activity of some drugs. OBJECTIVES: The aim of this study was the development of a new composition of non-effervescent floating tablets and the evaluation of the effect of an anionic polymer and compressive force on the floating properties and release characteristics of tablets containing a model alkaline drug, chlorhexidine (CHX)...
December 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29439378/the-experience-of-seeking-gaining-and-maintaining-employment-after-traumatic-spinal-cord-injury-and-the-vocational-pathways-involved
#11
Gillean Hilton, Carolyn A Unsworth, Ruth Stuckey, Gregory C Murphy
BACKGROUND: Vocational potential in people with spinal cord injury (SCI) are unrealised with rates of employment substantially lower than in the labour force participation of the general population and the pre-injury employment rates. OBJECTIVES: To understand the experience and pathway of people achieving employment outcome after traumatic spinal cord injury by; classifying participants into employment outcome groups of stable, unstable and without employment; identifying pre and post-injury pathways for participants in each group and, exploring the experiences of people of seeking, gaining and maintaining employment...
2018: Work: a Journal of Prevention, Assessment, and Rehabilitation
https://www.readbyqxmd.com/read/29431704/brackish-water-desalination-using-electrodialysis-predictive-mass-transfer-and-concentration-distribution-model-along-the-electrodialyzer
#12
Azadeh Ghorbani, Abbas Ghassemi
This study employs theory and experimental data from a laboratory-scale electrodialyzer to predict sodium chloride (NaCl) mass transport and concentration distribution along the electrodialyzer as a function of feed concentration, feed flow rate, applied voltage, and pressure. Moreover, a model was developed to predict the ion removal as a function of driving forces through solving the complete Navier-Stokes, continuity, and steady state Nernst-Planck equations by the finite difference numerical method. The findings of the experiments confirmed that concentration distributions are nonlinear along both the dilute and concentrate compartments...
February 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29431172/progression-and-effect-of-cognitive-behavioral-changes-in-patients-with-amyotrophic-lateral-sclerosis
#13
Meredith Bock, Y-Nhy Duong, Anthony Kim, Isabel Allen, Jennifer Murphy, Catherine Lomen-Hoerth
Background: To prospectively evaluate the progression of cognitive-behavioral function in amyotrophic lateral sclerosis (ALS) and examine the association of cognitive-behavioral deficits with disease progression, patient quality of life (QOL), and caregiver burden. Methods: We evaluated cognitive-behavioral function using the Amyotrophic Lateral Sclerosis Cognitive Behavioral Screen at enrollment and after 7 months in a cohort of patients with ALS. Paired t tests were used to evaluate the change in the 2 assessments...
December 2017: Neurology. Clinical Practice
https://www.readbyqxmd.com/read/29427745/enhanced-tendon-to-bone-repair-through-adhesive-films
#14
Stephen W Linderman, Mikhail Golman, Thomas R Gardner, Victor Birman, William N Levine, Guy M Genin, Stavros Thomopoulos
Tendon-to-bone surgical repairs have unacceptably high failure rates, possibly due to their inability to recreate the load transfer mechanisms of the native enthesis. Instead of distributing load across a wide attachment footprint area, surgical repairs concentrate shear stress on a small number of suture anchor points. This motivates development of technologies that distribute shear stresses away from suture anchors and across the enthesis footprint. Here, we present predictions and proof-of-concept experiments showing that mechanically-optimized adhesive films can mimic the natural load transfer mechanisms of the healthy attachment and increase the load tolerance of a repair...
February 7, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29425716/biological-connective-tissues-exhibit-viscoelastic-and-poroelastic-behavior-at-different-frequency-regimes-application-to-tendon-and-skin-biophysics
#15
Ramin Oftadeh, Brianne K Connizzo, Hadi Tavakoli Nia, Christine Ortiz, Alan J Grodzinsky
In this study, a poroviscoelastic finite element model (FEM) was developed and used in conjunction with an AFM-based wide-bandwidth nanorheology system to predict the frequency-dependent mechanical behavior of tendon and dermis subjected to compression via nanoindentation. The aim was to distinguish between loading rates that are dominated by either poroelasticity, viscoelasticity, or the superposition of these processes. Using spherical probe tips having different radii, the force and tip displacement were measured and the magnitude, |E∗|, and phase angle, ϕ, of the dynamic complex modulus were evaluated for mouse supraspinatus tendon and mouse dermis...
February 6, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29425576/evidence-based-and-consensus-clinical-practice-guidelines-for-the-iron-treatment-of-restless-legs-syndrome-willis-ekbom-disease-in-adults-and-children-an-irlssg-task-force-report
#16
Richard P Allen, Daniel L Picchietti, Michael Auerbach, Yong Won Cho, James R Connor, Christopher J Earley, Diego Garcia-Borreguero, Suresh Kotagal, Mauro Manconi, William Ondo, Jan Ulfberg, John W Winkelman
BACKGROUND: Brain iron deficiency has been implicated in the pathophysiology of RLS, and current RLS treatment guidelines recommend iron treatment when peripheral iron levels are low. In order to assess the evidence on the oral and intravenous (IV) iron treatment of RLS and periodic limb movement disorder (PLMD) in adults and children, the International Restless Legs Syndrome Study Group (IRLSSG) formed a task force to review these studies and provide evidence-based and consensus guidelines for the iron treatment of RLS in adults, and RLS and PLMD in children...
January 2018: Sleep Medicine
https://www.readbyqxmd.com/read/29422913/identifying-potential-plasmodium-vivax-sporozoite-stage-vaccine-candidates-an-analysis-of-genetic-diversity-and-natural-selection
#17
Diego Garzón-Ospina, Sindy P Buitrago, Andrea E Ramos, Manuel A Patarroyo
Parasite antigen genetic diversity represents a great obstacle when designing a vaccine against malaria caused by Plasmodium vivax. Selecting vaccine candidate antigens has been focused on those fulfilling a role in invasion and which are conserved, thus avoiding specific-allele immune responses. Most antigens described to date belong to the blood stage, thereby blocking parasite development within red blood cells, whilst studying antigens from other stages has been quite restricted. Antigens from different parasite stages are required for developing a completely effective vaccine; thus, pre-erythrocyte stage antigens able to block the first line of infection becoming established should also be taken into account...
2018: Frontiers in Genetics
https://www.readbyqxmd.com/read/29421963/making-football-safer-assessing-the-current-nfl-policy-on-the-type-of-helmets-allowed-on-the-playing-field
#18
Raymond Colello, Ian Alexander Colello, Duaa AbdelHameid, Kellen G Cresswell, Randall Merchant, Ethan Beckett
In an effort to reduce concussions in football, a helmet safety-rating system was developed in 2011 that rated helmets based on their ability to reduce g-forces experienced by the head across a range of impact forces measured on the playing field. Although this was considered a major step in making the game safer, the NFL continues to allow players the right to choose what helmet to wear during play. This prompted us to ask: what helmets do NFL players wear and does this helmet policy make the game safer? Accordingly, we identified the helmets worn by nearly 1000 players on Weeks 13 and 1 of the 2015-2016 and 2016-2017 seasons, respectively...
February 8, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29421669/the-effects-of-polymer-concentration-shear-rate-and-temperature-on-the-gelation-time-of-aqueous-silica-poly-ethylene-oxide-shake-gels
#19
Harry Collini, Markus Mohr, Paul Luckham, Jiawen Shan, Andrew Russell
HYPOTHESIS: Aqueous mixtures of silica and Poly(ethylene-oxide) (PEO) are known as "Shake-gels" due to the formation of reversible gels when subject to an applied force, such as shaking. This shear-thickening effect can be observed using a rheometer, via distinct and abrupt increases in the viscosity of the material. Preliminary experiments qualitatively showed that the time elapsed before this occurs, termed the gelation time, varied depending on the conditions used. This paper reports on a systematic study into the effects of polymer concentration, shear rate and temperature on the gelation time, to quantify any relationships that exist between the variables and develop understanding of the gelation mechanism and kinetics...
January 31, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29420761/chinese-military-evaluation-of-a-portable-near-infrared-detector-of-traumatic-intracranial-hematomas
#20
Chun-Yang Liang, Yang Yang, Chun-Sen Shen, Hai-Jiang Wang, Nai-Ming Liu, Zhi-Wen Wang, Feng-Lei Zhu, Ru-Xiang Xu
Introduction: Secondary brain injury is the main cause of mortality from traumatic brain injury (TBI). One hallmark of TBI is intracranial hemorrhage, which occurs in 40-50% of severe TBI cases. Early identification of intracranial hematomas in TBI patients allows early surgical evacuation and can reduce the case fatality rate of TBI. As pre-hospital care is the weakest part of Chinese emergency care, there is an urgent need for a capability to detect brain hematomas early. In China, in addition to preventing injuries and diseases in military staff and in enhancing the military armed forces during war, military medicine participates in actions such as emergency public health crises, natural disasters, emerging conflicts, and anti-terrorist campaigns during peacetime...
February 6, 2018: Military Medicine
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