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https://www.readbyqxmd.com/read/28427249/crystal-structure-of-the-regulatory-domain-of-aphb-from-vibrio-vulnificus-a-virulence-gene-regulator
#1
Nohra Park, Saemee Song, Garam Choi, Kyung Ku Jang, Inseong Jo, Sang Ho Choi, Nam-Chul Ha
The transcriptional activator AphB has been implicated in acid resistance and pathogenesis in the food borne pathogens Vibrio vulnificus and Vibrio cholerae. To date, the full-length AphB crystal structure of V. cholerae has been determined and characterized by a tetrameric assembly of AphB consisting of a DNA binding domain and a regulatory domain (RD). Although acidic pH and low oxygen tension might be involved in the activation of AphB, it remains unknown which ligand or stimulus activates AphB at the molecular level...
April 20, 2017: Molecules and Cells
https://www.readbyqxmd.com/read/28427026/epilepsy-and-headaches-further-evidence-of-a-link
#2
Asli Ece Çilliler, Hayat Güven, Selim Selçuk Çomoğlu
OBJECTIVE: Epilepsy and primary headaches are two of the most common neurologic conditions that share some common clinical characteristics, and can affect individuals of all age groups around the world. In recent years, the underlying pathophysiologic mechanisms potentially common to both headaches and epileptic seizures have been the subject of scrutiny. The objective of this study was to determine the frequencies and types of headaches in patients with epilepsy, and evaluate any temporal relationship with epileptic seizures...
April 17, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28426692/what-is-adaptation-by-natural-selection-perspectives-of-an-experimental-microbiologist
#3
REVIEW
Richard E Lenski
Ever since Darwin, the role of natural selection in shaping the morphological, physiological, and behavioral adaptations of animals and plants across generations has been central to understanding life and its diversity. New discoveries have shown with increasing precision how genetic, molecular, and biochemical processes produce and express those organismal features during an individual's lifetime. When it comes to microorganisms, however, understanding the role of natural selection in producing adaptive solutions has historically been, and sometimes continues to be, contentious...
April 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28426449/temperature-and-oxygenation-during-organ-preservation-friends-or-foes
#4
Nicholas Gilbo, Diethard Monbaliu
PURPOSE OF REVIEW: The liberalization of donor selection criteria in organ transplantation, with the increased use of suboptimal grafts, has stimulated interest in ischemia-reperfusion injury prevention and graft reconditioning. Organ preservation technologies are changing considerably, mostly through the reintroduction of dynamic machine preservation. Here, we review the current evidence on the role of temperature and oxygenation during dynamic machine preservation. RECENT FINDINGS: A large but complex body of evidence exists and comparative studies are few...
April 19, 2017: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/28426251/current-concepts-of-the-anterolateral-ligament-of-the-knee-anatomy-biomechanics-and-reconstruction
#5
Matthew J Kraeutler, K Linnea Welton, Jorge Chahla, Robert F LaPrade, Eric C McCarty
In 1879, Paul Segond described an avulsion fracture (now known as a Segond fracture) at the anterolateral proximal tibia with the presence of a fibrous band at the location of this fracture. Although references to this ligament were occasionally made in the anatomy literature after Segond's discovery, it was not until 2012 that Vincent et al named this ligament what we know it as today, the anterolateral ligament (ALL) of the knee. The ALL originates near the lateral epicondyle of the distal femur and inserts on the proximal tibia near Gerdy's tubercle...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28426245/visualizing-tensions-in-an-ethnographic-moment-images-and-intersubjectivity
#6
Jerome W Crowder
Images function as sources of data and influence our thinking about fieldwork, representation and intersubjectivity. In this article, I show how both the ethnographic relationships and the working method of photography lead to a more nuanced understanding of a healing event. I systematically analyze 33 photographs made over a 15 minute period during the preparation and application of a poultice (topical cure) in a rural Andean home. The images chronicle the event, revealing my initial reaction and the decisions I made when tripping the shutter...
April 20, 2017: Medical Anthropology
https://www.readbyqxmd.com/read/28426195/one-step-fabrication-of-non-fluorinated-transparent-super-repellent-surfaces-with-tunable-wettability-functioning-both-in-air-and-oil
#7
Mengying Long, Shan Peng, Xiaojun Yang, Wanshun Deng, Ni Wen, Kai Miao, Gongyun Chen, Xinrui Miao, Wenli Deng
In this paper, we have developed a one-step thermal treatment of polydimethylsiloxane (PDMS) liquid to create transparent super-repellent surface (TSS) and super-repellent powder. They are super-repellent toward water and ethylene glycol. During the one-step thermal treatment, PDMS soot generated and deposited onto glass slide (GS) surface to fabricate the TSS without fluorosilane modification. The facilely obtained TSS presented superhydrophobicity and self-cleaning property when immersed into very low-surface-tension oils such as petroleum ether, hexadecane, peanut oil, and dodecane...
April 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28425929/contradictions-and-promise-for-end-of-life-communication-among-family-and-friends-death-over-dinner-conversations
#8
Andrea Lambert South, Jessica Elton
The free, open-access website called "Let's Get Together and Talk about Death", or Death over Dinner (DoD), provides resources for initiating end-of-life conversations with family and friends by taking the frightening-talking about death-and transforming it into the familiar-a conversation over dinner. This qualitative, descriptive study uses grounded theory and thematic analysis to answer the following research question: How do friend and family groups communicate about death and dying in DoD conversations? To answer this question, 52 dinner groups were recruited and conversations were conducted, which consisted of a facilitator and volunteers...
April 20, 2017: Behavioral Sciences
https://www.readbyqxmd.com/read/28425716/reactions-of-n2o5-with-salty-and-surfactant-coated-glycerol-interfacial-conversion-of-br-to-br2-mediated-by-alkylammonium-cations
#9
Michael A Shaloski, Joseph R Gord, Sean Staudt, Sarah L Quinn, Timothy H Bertram, Gilbert Maker Nathanson
Gas-liquid scattering and product-yield experiments are used to investigate reactions of N2O5 with glycerol containing Br(-) and surfactant ions. N2O5 oxidizes Br(-) to Br2 for every solution tested: 2.7 M NaBr, 0.03 M tetrahexylammonium bromide (THABr), 0.03 M THABr + 0.5 M NaBr, 0.03 M THABr + 0.5 M NaCl, 0.03 M THABr + 0.01 M sodium dodecyl sulfate (SDS), and 0.01 M cetyltrimethylammonium bromide (CTABr). N2O5 also reacts with glycerol itself to produce mono- and dinitroglycerin. Surface tension measurements indicate that 0...
April 20, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28425711/influence-of-surfactants-on-sodium-chloride-crystallization-in-confinement
#10
Mohsin J Qazi, Rinse W Liefferink, Simon J Schlegel, Ellen H G Backus, Daniel Bonn, Noushine Shahidzadeh
We study the influence of different surfactants on NaCl crystallization during evaporation of aqueous salt solutions. We found that at concentrations of sodium chloride close to saturation, only the cationic surfactant CTAB and the nonionic surfactant Tween 80 remain stable. For the nonionic surfactant, the high concentration of salt does not significantly change either the critical micellar concentration (CMC) or the surface tension at the CMC; for the cationic surfactant, the CMC is reduced by roughly 2 orders of magnitude upon adding the salt...
April 20, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28425594/trilobed-pedicled-superior-gluteal-artery-perforator-flap-for-lumbosacral-defect-coverage
#11
Ji Min Kim, Jun Ho Lee, Deuk Young Oh, Suk-Ho Moon
BACKGROUND: There are many available options for the coverage of lumbosacral area defects. Surgeons usually use the superior gluteal artery perforator flap (SGAP) by rotational fashion, which risks complications, such as wound dehiscence or skin necrosis at the Y-point on the donor site due to the tension. In this report, the authors present the experience of using trilobed pedicled SGAP flaps in coverage of the lumbosacral area defects. METHODS: From 2011 to 2015, 16 trilobed pedicled SGAP flaps were performed for the coverage of sacral defects in our facility...
April 20, 2017: Microsurgery
https://www.readbyqxmd.com/read/28424977/restless-legs-syndrome-and-tension-type-headache-a-population-based-study
#12
Pil-Wook Chung, Soo-Jin Cho, Won-Joo Kim, Kwang Ik Yang, Chang-Ho Yun, Min Kyung Chu
BACKGROUND: Recent studies have shown a significant association between restless legs syndrome (RLS) and primary headache disorders. Nevertheless, information regarding the association between tension-type headache (TTH) and RLS is limited. This study aimed to investigate the association between RLS and TTH in a population-based sample. METHODS: We selected a stratified random population sample of Koreans aged 19-69 years and assessed them using a semi-structured interview designed to identify RLS, headache type, and clinical characteristics of TTH...
December 2017: Journal of Headache and Pain
https://www.readbyqxmd.com/read/28424860/influence-of-tibial-hybrid-fixation-on-graft-tension-and-stability-in-acl-double-bundle-reconstruction
#13
B H Drews, A Seitz, J Huth, G Bauer, A Ignatius, L Dürselen
PURPOSE: Initial graft tension in anterior cruciate ligament (ACL) reconstruction affects stability and tension loss at follow-up. This study investigated the influence of hybrid tibial fixation in 3-tunnel double-bundle ACL reconstruction on initial graft tension and tension change and stability under anterior and combined rotatory loads. METHODS: Eleven fresh-frozen cadaveric knees were reconstructed with an ACL double bundle using a 3-tunnel technique. Grafts were tightened to 80 N in 60° (AM bundle) and 15° (PL bundle) of flexion...
April 19, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28424747/association-between-optic-nerve-head-microcirculation-and-macular-ganglion-cell-complex-thickness-in-eyes-with-untreated-normal-tension-glaucoma-and-a-hemifield-defect
#14
Ayako Anraku, Kyoko Ishida, Nobuko Enomoto, Seiji Takagi, Hiroyuki Ito, Asuka Takeyama, Fumihiko Yagi, Goji Tomita
Purpose. We evaluated the association between optic nerve head (ONH) microcirculation and macular ganglion cell complex (mGCC) thickness in patients with untreated normal tension glaucoma (NTG) and a hemifield defect. Methods. The medical records of 47 patients with untreated NTG were retrospectively reviewed. Laser speckle flowgraphy was used to obtain mean blur rate (MBR), a relative measure of blood flow. Average total deviation (TD), mGCC, and the circumpapillary retinal nerve fiber layer (cpRNFL) thickness were also analyzed...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28424658/%C3%AE-and-%C3%AE-2-adrenoceptor-control-of-vascular-tension-and-catecholamine-release-in-female-normotensive-and-spontaneously-hypertensive-rats
#15
Torill Berg
As in humans, young, female, spontaneously hypertensive rats (SHR) have a lower blood pressure than male SHR. In male, normotensive rats (WKY), α2- and β1+2-adrenoceptors (AR) reciprocally controlled catecholamine release and vascular smooth muscle tension. This interaction was malfunctioning in male SHR. The present study analyzed if a favorable shift in the α2/β1+2AR interaction may represent an antihypertensive protection in females. Female SHR (early hypertension, 12-14 weeks) and age-matched WKY were infused with tyramine (15 min) to stimulate norepinephrine (NE) release through the reuptake transporter, consequently preventing reuptake...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28424653/disentangling-stigma-from-functional-neurological-disorders-conference-report-and-roadmap-for-the-future
#16
Karen S Rommelfanger, Stewart A Factor, Suzette LaRoche, Phyllis Rosen, Raymond Young, Mark H Rapaport
A multidisciplinary expert review of key issues and future directions from the conference "Controversial labels and clinical uncertainties: psychogenic disorders, conversion disorder, and functional symptoms." On October 9 and 10, 2015, a conference entitled "Controversial labels and clinical uncertainties: psychogenic disorders, conversion disorder, and functional symptoms" was held at the Center for Ethics, Emory University, Atlanta, GA, USA. This conference brought together a select group of 30 distinguished thought leaders and practitioners, including ethicists, researchers, clinicians, humanities scholars, and advocates to discuss the unique challenges and controversies related to the diagnosis, treatment, and stigma for patients with what is currently recognized as functional ("psychogenic") neurological disorders...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28424479/wnt-%C3%AE-catenin-signaling-pathway-a-major-player-in-the-injury-induced-fibrosis-and-dysfunction-of-the-external-anal-sphincter
#17
M Raj Rajasekaran, Sadhana Kanoo, Johnny Fu, Valmik Bhargava, Ravinder K Mittal
Wnt-β catenin is an important signaling pathway in the genesis of fibrosis in many organ systems. Our goal was to examine the role of Wnt pathway in the external anal sphincter (EAS) injury-related fibrosis and muscle dysfunction. New Zealand White female rabbits were subjected to surgical EAS myotomy and administered local injections of either a Wnt antagonist (sFRP-2; daily for 7 days) or saline. Anal canal pressure and EAS length-tension (L-T) were measured for 15 weeks after which the animals were sacrificed...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28424229/tension-activated-channels-in-the-mechanism-of-osmotic-fitness-in-pseudomonas-aeruginosa
#18
Uğur Çetiner, Ian Rowe, Anthony Schams, Christina Mayhew, Deanna Rubin, Andriy Anishkin, Sergei Sukharev
Pseudomonas aeruginosa (PA) is an opportunistic pathogen with an exceptional ability to adapt to a range of environments. Part of its adaptive potential is the ability to survive drastic osmolarity changes. Upon a sudden dilution of external medium, such as during exposure to rain, bacteria evade mechanical rupture by engaging tension-activated channels that act as osmolyte release valves. In this study, we compare fast osmotic permeability responses in suspensions of wild-type PA and Escherichia coli (EC) strains in stopped-flow experiments and provide electrophysiological descriptions of osmotic-release channels in PA...
April 19, 2017: Journal of General Physiology
https://www.readbyqxmd.com/read/28423909/ripping-rna-by-force-using-gaussian-network-models
#19
Changbong Hyeon, D Thirumalai
Using force as a probe to map the folding landscapes of RNA molecules has become a reality thanks to major advances in single molecule pulling experiments. Although the unfolding pathways under tension are complicated to predict, studies in the context of proteins have shown that topology is the major determinant of the unfolding landscapes. By building on this finding we study the responses of RNA molecules to force by adapting Gaussian network model (GNM) that represents RNAs using a bead-spring network with isotropic interactions...
April 20, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28423802/a-lens-for-evaluating-genetic-information-governance-models-balancing-equity-efficiency-and-sustainability
#20
Espen Skorve, Polyxeni Vassilakopoulou, Margunn Aanestad, Thomas Grünfeld
This paper draws from the literature on collective action and the governance of the commons to address the governance of genetic data on variants of specific genes. Specifically, the data arrangements under study relate to the BRCA genes (BRCA1 and BRCA2) which are linked to breast and ovarian cancer. These data are stored in global genetic data repositories and accessed by researchers and clinicians, from both public and private institutions. The current BRCA data arrangements are fragmented and politicized as there are multiple tensions around data ownership and sharing...
2017: Studies in Health Technology and Informatics
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