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https://www.readbyqxmd.com/read/28088333/mitochondrial-uncoupling-in-cancer-cells-liabilities-and-opportunities
#1
REVIEW
Gyorgy Baffy
Acquisition of the endosymbiotic ancestor of mitochondria was a critical event in eukaryote evolution. Mitochondria offered an unparalleled source of metabolic energy through oxidative phosphorylation and allowed the development of multicellular life. However, as molecular oxygen had become the terminal electron acceptor in most eukaryotic cells, the electron transport chain proved to be the largest intracellular source of superoxide, contributing to macromolecular injury, aging, and cancer. Hence, the 'contract of endosymbiosis' represents a compromise between the possibilities and perils of multicellular life...
January 11, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28079960/successful-medical-management-of-a-domestic-longhair-cat-with-subdural-intracranial-empyema-and-multifocal-pneumonia
#2
Thomas J A Cardy, Richard Lam, Laureen M Peters, Philippa J McLaren, Màrian Matas Riera, Steven De Decker
OBJECTIVE: To describe a case of successful medical management of subdural intracranial empyema and multifocal pneumonia in a domestic longhaired cat. CASE SUMMARY: A 7-year-and-8-month-old male neutered domestic longhair cat presented with tachypnea, respiratory compromise, vestibular ataxia, obtundation, left-sided head tilt, and multiple cranial nerve deficits. Neuroanatomical localization was multifocal with central vestibular involvement. Magnetic resonance imaging of the head indicated diffuse subdural empyema, mainly affecting the middle cranial fossa and the right cerebrum...
January 12, 2017: Journal of Veterinary Emergency and Critical Care
https://www.readbyqxmd.com/read/28079922/iga-tracheobronchial-deposits-underlie-respiratory-compromise-in-neonatal-linear-iga-bullous-dermatosis
#3
A Diociaiuti, G Zambruno, F Diomedi Camassei, G Di Zenzo, I Capolupo, F Stoppa, V Forziati, M El Hachem
The childhood variant of linear IgA bullous dermatosis (LABD) is characterized by blistering lesions of the perineum and perioral area with an annular or "rosette-like" arrangement, in addition to the pathognomonic linear IgA deposits along the cutaneous basement membrane zone (BMZ).(1) The disease mainly occurs in preschool children.(1) However, a handful of neonatal cases have been described, most of them presenting with severe mucosal involvement.(2-8) We report an additional case of neonatal LABD with life-threatening respiratory tract manifestations...
January 12, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28078465/non-inferiority-of-minimally-invasive-oesophagectomy-an-8-year-retrospective-case-series
#4
L Findlay, C Yao, D H Bennett, R Byrom, N Davies
BACKGROUND: The trend towards laparoscopic surgery seen in other specialties has not occurred at the same pace in oesophagectomy. This stems from concerns regarding compromised oncological clearance, and complications associated with gastric tube necrosis and anastomotic failure. We present our experience of minimally invasive oesophagectomy (MIO) compared to open and hybrid surgery. We aim to ascertain non-inferiority of MIO by evaluating impact on survival, oncological clearance by resection margin and lymph node harvest and post-operative complications...
January 11, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28077609/travellers-and-influenza-risks-and-prevention
#5
REVIEW
M Goeijenbier, P van Genderen, B J Ward, A Wilder-Smith, R Steffen, A D M E Osterhaus
BACKGROUND: Influenza viruses are among the major causes of serious human respiratory tract infection worldwide. In line with the high disease burden attributable to influenza, these viruses play an important, but often neglected, role in travel medicine. Guidelines and recommendations regarding prevention and management of influenza in travellers are scarce. Of special interest for travel medicine are risk populations and also circumstances that facilitate influenza virus transmission and spread, like travel by airplane or cruise ship and mass gatherings...
January 2017: Journal of Travel Medicine
https://www.readbyqxmd.com/read/28075489/cough-augmentation-techniques-for-extubation-or-weaning-critically-ill-patients-from-mechanical-ventilation
#6
REVIEW
Louise Rose, Neill Kj Adhikari, David Leasa, Dean A Fergusson, Douglas McKim
BACKGROUND: There are various reasons why weaning and extubation failure occur, but ineffective cough and secretion retention can play a significant role. Cough augmentation techniques, such as lung volume recruitment or manually- and mechanically-assisted cough, are used to prevent and manage respiratory complications associated with chronic conditions, particularly neuromuscular disease, and may improve short- and long-term outcomes for people with acute respiratory failure. However, the role of cough augmentation to facilitate extubation and prevent post-extubation respiratory failure is unclear...
January 11, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28075272/measuring-peak-expiratory-flow-rate-what-the-nurse-needs-to-know
#7
Rebecca Myatt
Rationale and key points This article provides information on monitoring a patient's peak expiratory flow rate. It explains the rationale for measuring the peak expiratory flow rate, provides guidance for nurses to undertake this investigation and offers advice on how to instruct patients in the use of this technique. » Measuring the peak expiratory flow rate is an inexpensive, straightforward and useful clinical investigation that enables fluctuations in the patient's respiratory effort to be monitored over time...
January 11, 2017: Nursing Standard
https://www.readbyqxmd.com/read/28062486/plasma-membrane-wounding-and-repair-in-pulmonary-diseases
#8
Xiaofei Cong, Rolf Dieter Hubmayr, Changgong Li, Xiaoli Zhao
Various pathophysiological conditions such as surfactant dysfunction, mechanical ventilation, inflammation, pathogen products, environmental exposures and gastric acid aspiration stress lung cells and the compromise of plasma membranes occur as a result. The mechanisms necessary for cells to repair plasma membrane defects have been extensively investigated in the last two decades, and some of these key repair mechanisms are also shown to occur following lung cell injury. As it was theorized that lung wounding and repair are involved in the pathogenesis of acute respiratory distress syndrome (ARDS) and idiopathic pulmonary fibrosis (IPF), in this review, we summarized the experimental evidence of lung cell injury in these two devastating syndromes, discuss relevant genetic, physical and biological injury mechanisms, as well as mechanisms utilized by lung cells for cell survival and membrane repair...
January 6, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28060946/high-osmolarity-environments-activate-the-mitochondrial-alternative-oxidase-in-debaryomyces-hansenii
#9
Wilson Garcia-Neto, Alfredo Cabrera-Orefice, Salvador Uribe-Carvajal, Alicia J Kowaltowski, Luis Alberto Luévano-Martínez
The oleaginous yeast Debaryomyces hansenii is a good model to understand molecular mechanisms involved in halotolerance because of its impressive ability to survive under a wide range of salt concentrations. Several cellular adaptations are implicated in this response, including the presence of a cyanide-insensitive ubiquinol oxidase (Aox). This protein, which is present in several taxonomical orders, has been related to different stress responses. However, little is known about its role in mitochondria during transitions from low to high saline environments...
2017: PloS One
https://www.readbyqxmd.com/read/28052123/determination-of-the-mutant-selection-window-and-evaluation-of-the-killing-of-mycoplasma-gallisepticum-by-danofloxacin-doxycycline-tilmicosin-tylvalosin-and-valnemulin
#10
Nan Zhang, Xiaomei Ye, Yuzhi Wu, Zilong Huang, Xiaoyan Gu, Qinren Cai, Xiangguang Shen, Hongxia Jiang, Huanzhong Ding
Mycoplasma gallisepticum is a common etiological cause of a chronic respiratory disease in chickens; its increasing antimicrobial resistance compromises the use of tetracyclines, macrolides and quinolones in the farm environment. Mutant selection window (MSW) determination was used to investigate the propensity for future resistance induction by danofloxacin, doxycycline, tilmicosin, tylvalosin and valnemulin. Killing of M. gallisepticum strain S6 by these antimicrobials was also studied by incubating M. gallisepticum into medium containing the compounds at the minimal concentration that inhibits colony formation by 99% (MIC99) and the mutant prevention concentration (MPC)...
2017: PloS One
https://www.readbyqxmd.com/read/28050802/the-effectiveness-of-apneic-oxygenation-during-tracheal-intubation-in-various-clinical-settings-a-narrative-review
#11
David T Wong, Amanda J Yee, Siaw May Leong, Frances Chung
PURPOSE: During the process of tracheal intubation, patients are apneic or hypoventilating and are at risk of becoming hypoxemic. This risk is especially high in patients with acute or chronic respiratory failure and accompanying compromised respiratory reserve. To address this concern, apneic oxygenation can be administered during tracheal intubation to aid in maintaining arterial oxygen saturation. The objective of this narrative review is to examine the utilization of apneic oxygenation within the operating room, intensive care unit (ICU), emergency department, and pre-hospital settings and to determine its efficacy compared with controls...
January 3, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/28047399/mo-de-207a-12-toward-patient-specific-4dct-reconstruction-using-adaptive-velocity-binning
#12
E D Morris, P Klahr, C Glide-Hurst
PURPOSE: While 4DCT provides organ/tumor motion information, it often samples data over 10-20 breathing cycles. For patients presenting with compromised pulmonary function, breathing patterns can change over the acquisition time, potentially leading to tumor delineation discrepancies. This work introduces a novel adaptive velocity-modulated binning (AVB) 4DCT algorithm that modulates the reconstruction based on the respiratory waveform, yielding a patient-specific 4DCT solution. METHODS: AVB was implemented in a research reconstruction configuration...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047075/su-f-t-560-measurement-of-dose-blurring-effect-due-to-respiratory-motion-for-lung-stereotactic-body-radiation-therapy-sbrt-using-monte-carlo-based-calculation-algorithm
#13
R Badkul, D Pokhrel, T Ramanjappa, H Jiang, C Lominska, F Wang
PURPOSE: Intra-fractional tumor motion due to respiration may potentially compromise dose delivery for SBRT of lung tumors. Even sufficient margins are used to ensure there is no geometric miss of target volume, there is potential dose blurring effect may present due to motion and could impact the tumor coverage if motions are larger. In this study we investigated dose blurring effect of open fields as well as Lung SBRT patients planned using 2 non-coplanar dynamic conformal arcs(NCDCA) and few conformal beams(CB) calculated with Monte Carlo (MC) based algorithm utilizing phantom with 2D-diode array(MapCheck) and ion-chamber...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046228/su-f-j-138-an-extension-of-pca-based-respiratory-deformation-modeling-via-multi-linear-decomposition
#14
A S Iliopoulos, N Pitsianis, X Sun, F F Yin, L Ren
PURPOSE: To address and lift the limited degree of freedom (DoF) of globally bilinear motion components such as those based on principal components analysis (PCA), for encoding and modeling volumetric deformation motion. METHODS: We provide a systematic approach to obtaining a multi-linear decomposition (MLD) and associated motion model from deformation vector field (DVF) data. We had previously introduced MLD for capturing multi-way relationships between DVF variables, without being restricted by the bilinear component format of PCA-based models...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046215/su-g-jep4-05-effects-of-irregular-respiratory-motion-on-the-positioning-accuracy-of-moving-target-with-free-breathing-cone-beam-computerized-tomography
#15
X Li, G Yang, R Ma, E Yorke, G Mageras, X Tang, W Xiong, M Chan, M Reyngold, R Gewanter, A Wu, J Deasy, M Hunt
PURPOSE: Average or maximum intensity projection (AIP or MIP) images derived from 4DCT images are often used as a reference image for target alignment when free breathing Cone-beam CT (FBCBCT) is used for positioning a moving target at treatment. This method can be highly accurate if the patient has stable respiratory motion. However, a patient's breathing pattern often varies irregularly. The purpose of this study is to investigate the effect of irregular respiration on the positioning accuracy of a moving target with FBCBCT...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28040370/benefit-of-extracorporeal-membrane-oxygenation-in-major-burns-after-stun-grenade-explosion-experience-from-a-single-military-medical-center
#16
Po-Shun Hsu, Yi-Ting Tsai, Chih-Yuan Lin, Shyi-Gen Chen, Niann-Tzyy Dai, Cheng-Jung Chen, Jia-Lin Chen, Chien-Sung Tsai
INTRODUCTION: Explosion injury is very common on the battlefield and is associated with major burn and inhalation injuries and subsequent high mortality and morbidity rates. Here we report six victims who suffered from explosion injuries caused by stun grenade; all were treated with extracorporeal membrane oxygenation (ECMO) as salvage therapy. This study was aimed to evaluate the indications and efficacy of ECMO in acute and critically ill major burn patients. METHODS: This was a retrospective analysis of six patients from Tri-Service General Hospital, National Defense Medical Center in Taiwan...
December 28, 2016: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28034711/ventilatory-and-chemoreceptor-responses-to-hypercapnia-in-neonatal-rats-chronically-exposed-to-moderate-hyperoxia
#17
Ryan W Bavis, Ke-Yong Li, Kathryn J DeAngelis, Ryan J March, Josefine A Wallace, Sarah Logan, Robert W Putnam
Rats reared in hyperoxia hypoventilate in normoxia and exhibit progressive blunting of the hypoxic ventilatory response, changes which are at least partially attributed to abnormal carotid body development. Since the carotid body also responds to changes in arterial CO2/pH, we tested the hypothesis that developmental hyperoxia would attenuate the hypercapnic ventilatory response (HCVR) of neonatal rats by blunting peripheral and/or central chemoreceptor responses to hypercapnic challenges. Rats were reared in 21% O2 (Control) or 60% O2 (Hyperoxia) until studied at 4, 6-7, or 13-14days of age...
December 26, 2016: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28032947/controversies-in-the-management-of-caustic-ingestion-injury-an-evidence-based-review
#18
J H Bird, S Kumar, C Paul, J D Ramsden
BACKGROUND: Caustic ingestion of acid or alkaline substances can cause damage to the upper respiratory and upper digestive tract. Initial presentation following caustic ingestion can include oropharyngeal pain, dysphagia and stridor. Due to this clinical presentation that the resident otolaryngologist is consulted to review and examine these patients to assess for airway compromise and commence initial management and care until airway concern has passed. OBJECTIVE OF REVIEW: This review aims to provide evidence based guidance in the management of those presenting with acute ingestion injury so that informed initial medical therapy can be commenced and appropriate investigations arranged to optimise patient outcome...
December 29, 2016: Clinical Otolaryngology
https://www.readbyqxmd.com/read/28029591/cardiorespiratory-interactions-in-paediatrics-it-s-almost-always-the-circulation-stupid
#19
REVIEW
M L Rigby, M Rosenthal
The interaction of the heart and lungs is probably the most important aspect of life and survival. Fortunately, it is not difficult to understand the fundamentals. The purpose of the lungs and their ventilation is to present oxygen to the circulation via the alveoli and to receive carbon dioxide from the circulation and then expel it. The relations of the heart and lungs and the matching of blood flow to the various organs with ventilation and lung perfusion may be disrupted by a variety of congenital or acquired heart malformations...
August 12, 2016: Paediatric Respiratory Reviews
https://www.readbyqxmd.com/read/28018859/autophagy-tgf-%C3%AE-and-smad-2-3-signaling-regulates-interferon-%C3%AE-response-in-respiratory-syncytial-virus-infected-macrophages
#20
Swechha M Pokharel, Niraj K Shil, Santanu Bose
Human respiratory syncytial virus (RSV) is a lung tropic virus causing severe airway diseases including bronchiolitis and pneumonia among infants, children, and immuno-compromised individuals. RSV triggers transforming growth factor-β (TGF-β) production from lung epithelial cells and TGF-β facilitates RSV infection of these cells. However, it is still unknown whether RSV infected myeloid cells like macrophages produce TGF-β and the role of TGF-β if any during RSV infection of these cells. Our study revealed that RSV infected macrophages produce TGF-β and as a consequence these cells activate TGF-β dependent SMAD-2/3 signaling pathway...
2016: Frontiers in Cellular and Infection Microbiology
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