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https://www.readbyqxmd.com/read/28937603/proteome-stability-as-a-key-factor-of-genome-integrity
#1
REVIEW
Sentiljana Gumeni, Zoi Evangelakou, Vassilis G Gorgoulis, Ioannis P Trougakos
DNA damage is constantly produced by both endogenous and exogenous factors; DNA lesions then trigger the so-called DNA damaged response (DDR). This is a highly synchronized pathway that involves recognition, signaling and repair of the damage. Failure to eliminate DNA lesions is associated with genome instability, a driving force in tumorigenesis. Proteins carry out the vast majority of cellular functions and thus proteome quality control (PQC) is critical for the maintenance of cellular functionality. PQC is assured by the proteostasis network (PN), which under conditions of proteome instability address the triage decision of protein fold, hold, or degrade...
September 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28930100/the-joule-heating-problem-in-silver-nanowire-transparent-electrodes
#2
H H Khaligh, L Xu, A Khosropour, A Madeira, M Romano, C Pradére, M Tréguer-Delapierre, L Servant, M A Pope, I A Goldthorpe
Silver nanowire transparent electrodes have shown considerable potential to replace conventional transparent conductive materials. However, in this report we show that Joule heating is a unique and serious problem with these electrodes. When conducting current densities encountered in organic solar cells, the average surface temperature of indium tin oxide (ITO) and silver nanowire electrodes, both with sheet resistances of 60 ohms/square, remains below 35 °C. However, in contrast to ITO, the temperature in the nanowire electrode is very non-uniform, with some localized points reaching temperatures above 250 °C...
September 20, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28928151/comparative-analysis-reveals-genomic-features-of-stress-induced-transcriptional-readthrough
#3
Anna Vilborg, Niv Sabath, Yuval Wiesel, Jenny Nathans, Flonia Levy-Adam, Therese A Yario, Joan A Steitz, Reut Shalgi
Transcription is a highly regulated process, and stress-induced changes in gene transcription have been shown to play a major role in stress responses and adaptation. Genome-wide studies reveal prevalent transcription beyond known protein-coding gene loci, generating a variety of RNA classes, most of unknown function. One such class, termed downstream of gene-containing transcripts (DoGs), was reported to result from transcriptional readthrough upon osmotic stress in human cells. However, how widespread the readthrough phenomenon is, and what its causes and consequences are, remain elusive...
September 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28910461/exertional-heat-illness-resulting-in-acute-liver-failure-and-liver-transplantation
#4
Benjamin Boni, Christopher Amann Amann
Heat illness remains a large medical burden for militaries around the world. Mitigating the incidence as well as the complications of heat illness must remain on the forefront of operational planning when operating in hot environments. We report the case of a 27-year-old male U.S. Marine who sustained a heat-related illness resulting in fulminant liver failure and permanent disability. The patient was transferred from the field to a civilian hospital. On hospital day 5, liver failure was identified. The patient was transferred to a transplant center, where he successfully received a liver transplant...
2017: Journal of Special Operations Medicine: a Peer Reviewed Journal for SOF Medical Professionals
https://www.readbyqxmd.com/read/28904810/nasal-high-flow-treatment-in-preterm-infants
#5
REVIEW
Calum T Roberts, Kate A Hodgson
Nasal High Flow (HF) is a mode of 'non-invasive' respiratory support for preterm infants, with several potential modes of action, including generation of distending airway pressure, washout of the nasopharyngeal dead space, reduction of work of breathing, and heating and humidification of inspired gas. HF has several potential advantages over continuous positive airway pressure (CPAP), the most commonly applied form of non-invasive support, such as reduced nasal trauma, ease of use, and infant comfort, which has led to its rapid adoption into neonatal care...
2017: Maternal Health, Neonatology and Perinatology
https://www.readbyqxmd.com/read/28888667/preimmunization-with-a-heat-killed-preparation-of-mycobacterium-vaccae-enhances-fear-extinction-in-the-fear-potentiated-startle-paradigm
#6
James H Fox, James E Hassell, Philip H Siebler, Mathew R Arnold, Andrew K Lamb, David G Smith, Heidi E W Day, Tessa M Smith, Emma M Simmerman, Alexander A Outzen, Kaley S Holmes, Christopher J Brazell, Christopher A Lowry
The hygiene hypothesis or "Old Friends" hypothesis proposes that inflammatory diseases are increasing in modern urban societies, due in part to reduced exposure to microorganisms that drive immunoregulatory circuits, and a failure to terminate inappropriate inflammatory responses. Inappropriate inflammation is also emerging as a risk factor for trauma-related, anxiety, and affective disorders, including posttraumatic stress disorder (PTSD), which is characterized as persistent re-experiencing of the trauma after a traumatic experience...
September 6, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28880563/softened-mechanical-properties-of-graphene-induced-by-electric-field
#7
Peng Huang, Dan Guo, Guoxin Xie, Jian Li
The understanding on the mechanical properties of graphene under the applications of physical fields is highly relevant to the reliability and lifetime of graphene-based nanodevices. In this work, we demonstrate that the application of electric field could soften the mechanical properties of graphene dramatically on the basis of the conductive AFM nanoindentation method. It has been found that the Young's modulus and fracture strength of graphene nanosheets suspended on the holes almost stay the same initially and then exhibit a sharp drop when the normalized electric field strength increases to be 0...
September 11, 2017: Nano Letters
https://www.readbyqxmd.com/read/28866179/fabrication-and-in-vivo-evaluation-of-hydroxyapatite-carbon-nanotube-electrospun-fibers-for-biomedical-dental-application
#8
A S Khan, A N Hussain, L Sidra, Z Sarfraz, H Khalid, M Khan, F Manzoor, L Shahzadi, M Yar, I U Rehman
The aim was to synthesize bioactive electrospun fibers for biomedical and dental application with improved biocompatibility. In situ precipitation of nano-hydroxyapatite (nHA) was performed with various concentrations (0.5%, 1%, 2%, 3%, and 5% wt/wt) of functionalized multi-walled-carbon nanotubes (MWCNTs) by using microwave irradiation technique. The obtained composites were characterized by Fourier Transform Infrared (FTIR), X-ray Diffraction (XRD), Thermogravimetric Analysis/Differential Scanning Calorimetry (TGA/DSC), and the cylindrical discs were made for mechanical testing...
November 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28858644/a-computational-theoretical-model-for-radiofrequency-ablation-of-tumor-with-complex-vascularization
#9
Y L Shao, B Arjun, H L Leo, K J Chua
Radiofrequency ablation (RFA) for liver tumors is a minimally invasive procedure that uses electrical energy and heat to destroy cancer cells. One of the critical factors that impedes its successful outcome is the thermal heat sink effects from complex vascular systems that give rise to incomplete destruction of the target tumor tissue, resulting in therapy failure. To better understand the thermal influence of the complex vascular system during RFA, this work proposes the employment of two 3D fractal tree-like branched networks to investigate which key factors of the tree-like vascular system impact heating process...
August 24, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28858552/nitrous-oxide-inhalation-sedation-through-a-nasal-high-flow-system-the-possibility-of-a-new-technique-in-dental-sedation
#10
Takuro Sanuki, Gaku Mishima, Kensuke Kiriishi, Shinji Kurata, Ichiro Okaysu, Mari Kawai, Toshihiro Watanabe, Mizuki Tachi, Nobuyasu Komasawa, Takao Ayuse
High-flow nasal cannula (HFNC) systems are increasingly used for patients with both acute and chronic respiratory failure because of the clinical effectiveness and patient comfort associated with their use. Recently, HFNC has been used not only as a respiratory support device, but also as a drug delivery system. HFNC is designed to administer heated and humidified inspiratory oxygen flows (100% relative humidity at 37°C). Therefore, HFNC can provide high flows (up to 60 L/min) without discomfort. Moreover, HFNC improves oxygenation by exerting physiologic effects such as (a) dead-space washout and (b) moderate positive airway pressure...
2017: Anesthesia Progress
https://www.readbyqxmd.com/read/28844461/heat-shock-protein-27-acts-as-a-predictor-of-prognosis-in-chronic-heart-failure-patients
#11
Denise Traxler, Mitja Lainscak, Elisabeth Simader, Hendrik Jan Ankersmit, Borut Jug
BACKGROUND: Heat shock proteins (HSPs) represent intracellular mechanisms of stress response. Clinical implications of their (systemic) expression in patients with chronic heart failure (HF) remain inconclusive. METHODS: In outpatients with chronic stable HF plasma HSP27 levels were measured using ELISA. Patients were followed for a minimum of one year, and a multivariate Cox proportional hazard model was built for cardiovascular death or HF-associated hospitalisations...
October 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28842701/drastic-improvement-in-adhesion-property-of-polytetrafluoroethylene-ptfe-via-heat-assisted-plasma-treatment-using-a-heater
#12
Yuji Ohkubo, Kento Ishihara, Masafumi Shibahara, Asahiro Nagatani, Koji Honda, Katsuyoshi Endo, Kazuya Yamamura
The heating effect on the adhesion property of plasma-treated polytetrafluoroethylene (PTFE) was examined. For this purpose, a PTFE sheet was plasma-treated at atmospheric pressure while heating using a halogen heater. When plasma-treated at 8.3 W/cm(2) without using the heater (Low-P), the surface temperature of Low-P was about 95 °C. In contrast, when plasma-treated at 8.3 W/cm(2) while using the heater (Low-P+Heater), the surface temperature of Low-P+Heater was controlled to about 260 °C. Thermal compression of the plasma-treated PTFE with or without heating and isobutylene-isoprene rubber (IIR) was performed, and the adhesion strength of the IIR/PTFE assembly was measured via the T-peel test...
August 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28838821/effect-of-annealing-procedure-on-the-bonding-of-ceramic-to-cobalt-chromium-alloys-fabricated-by-rapid-prototyping
#13
Ayca Tulga
STATEMENT OF PROBLEM: An annealing procedure is a heat treatment process to improve the mechanical properties of cobalt-chromium (Co-Cr) alloys. However, information is lacking about the effect of the annealing process on the bonding ability of ceramic to Co-Cr alloys fabricated by rapid prototyping. PURPOSE: The purpose of this in vitro study was to evaluate the effects of the fabrication techniques and the annealing procedure on the shear bond strength of ceramic to Co-Cr alloys fabricated by different techniques...
August 22, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28835360/chlamydia-trachomatis-the-persistent-pathogen
#14
Steven S Witkin, Evelyn Minis, Aikaterini Athanasiou, Julie Leizer, Iara M Linhares
Chlamydia trachomatis is an obligate intracellular bacterium whose only natural host is man. Although asymptomatic in most women, genital tract chlamydial infections are a leading cause of pelvic inflammatory disease, tubal factor infertility and ectopic pregnancy. C. trachomatis has evolved successful mechanisms to avoid destruction by autophagy and the host immune system and persist within host epithelial cells. The intracellular form of this organism, the reticulate body, can enter into a persistent non-replicative but viable state under unfavorable conditions...
August 23, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28828372/high-flow-nasal-oxygen-therapy-and-noninvasive-ventilation-in-the-management-of-acute-hypoxemic-respiratory-failure
#15
REVIEW
Jean-Pierre Frat, Rémi Coudroy, Nicolas Marjanovic, Arnaud W Thille
High-flow nasal cannula (HFNC) oxygen therapy is a recent technique delivering a high flow of heated and humidified gas. HFNC is simpler to use and apply than noninvasive ventilation (NIV) and appears to be a good alternative treatment for hypoxemic acute respiratory failure (ARF). HFNC is better tolerated than NIV, delivers high fraction of inspired oxygen (FiO2), generates a low level of positive pressure and provides washout of dead space in the upper airways, thereby improving mechanical pulmonary properties and unloading inspiratory muscles during ARF...
July 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28827800/hspb7-prevents-cardiac-conduction-system-defect-through-maintaining-intercalated-disc-integrity
#16
Wern-Chir Liao, Liang-Yi Juo, Yen-Ling Shih, Yen-Hui Chen, Yu-Ting Yan
HSPB7 is a member of the small heat-shock protein (HSPB) family and is expressed in the cardiomyocytes from cardiogenesis onwards. A dramatic increase in HSPB7 is detected in the heart and blood plasma immediately after myocardial infarction. Additionally, several single-nucleotide polymorphisms of HSPB7 have been identified to be associated with heart failure caused by cardiomyopathy in human patients. Although a recent study has shown that HSPB7 is required for maintaining myofiber structure in skeletal muscle, its molecular and physiological functions in the heart remain unclear...
August 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28827426/phase-transformation-induced-lubrication-of-earthquake-sliding
#17
Harry W Green
Frictional failure is not possible at depth in Earth, hence earthquakes deeper than 30-50 km cannot initiate by overcoming dry friction. Moreover, the frequency distribution of earthquakes with depth is bimodal, suggesting another change of mechanism at about 350 km. Here I suggest that the change at 30-50 km is from overcoming dry friction to reduction of effective stress by dehydration embrittlement and that the change at 350 km is due to desiccation of slabs and initiation by phase-transformation-induced faulting...
September 28, 2017: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28820681/efficacy-safety-and-cost-effectiveness-of-thermotherapy-in-the-treatment-of-leishmania-donovani-induced-cutaneous-leishmaniasis-a-randomized-controlled-clinical-trial
#18
Wardha F Refai, Nayani P Madarasingha, Buthsiri Sumanasena, Sudath Weerasingha, Amala De Silva, Rohini Fernandopulle, Abhay R Satoskar, Nadira D Karunaweera
Leishmania donovani causes cutaneous leishmaniasis (CL) in Sri Lanka. Standard treatment is multiple, painful doses of intralesional sodium stibogluconate (IL-SSG). Treatment failures are increasingly reported, hence the need to investigate alternatives. Efficacy, safety, and cost-effectiveness of thermotherapy were assessed for the first time for L. donovani CL. A single blinded noninferiority randomized controlled trial was conducted on new laboratory-confirmed CL patients with single lesions (N = 213). Selected patients were randomly assigned to 1) test group (N = 98; single session of radiofrequency-induced heat therapy (RFHT) given at 50°C for 30 seconds) and 2) control group (N = 115; 1-3 mL IL-SSG given weekly, until cure/10 doses)...
August 14, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28810996/rhabdomyolysis-after-crawling-military-training
#19
Danit Atias-Varon, Haggai Sherman, Ran Yanovich, Yuval Heled
INTRODUCTION: Rhabdomyolysis is a syndrome characterized by muscle necrosis followed by release of intracellular muscle contents into the circulation. Exertional rhabdomyolysis (ER) occurs in response to nonfamiliar and/or excessive, prolonged, or repetitive exercises, with eccentric characteristics. In military populations, due to the type of intense, all out physical loads, ER is a significant threat, particularly when training under heat stress. However, many other etiologies exist, and clinical presentations vary greatly...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28810980/risk-factors-for-rhabdomyolysis-in-the-u-s-army
#20
Owen T Hill, Dennis E Scofield, Jenna Usedom, Lakmini Bulathsinhala, Craig McKinnon, Paul Kwon, Timothy Haley, Robert Carter
The standardized mortality rate of rhabdomyolysis (RM) in Active Duty U.S. Army Soldiers is considerably higher than in the civilian population. RM occurs when large amounts of intracellular contents from damaged skeletal muscle escape into circulation, leading to serious sequelae (e.g., acute renal failure, hyperkalemia, compartment syndrome). Extended physical exertion, especially in hot environments, and trauma can precipitate RM. The aim of this study was to identify RM risk factors among U.S. Active Duty Army (ADA) Soldiers...
July 2017: Military Medicine
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