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https://www.readbyqxmd.com/read/28981603/high-mobility-group-box-1-protein-is-involved-in-the-protective-effect-of-saquinavir-on-ventilation-induced-lung-injury-in-mice
#1
Xin Wang, Renlingzi Zhang, Yao Tong, Xibing Ding, Shuqing Jin, Xiang Zhao, Jiaying Zong, Zhixia Chen, Timothy R Billiar, Quan Li
Saquinavir (SQV) is the first FDA approved HIV protease inhibitor. Previous studies showed that SQV can limit Toll-like receptor-4 (TLR4)-mediated inflammatory pathway and nuclear factor-κB (NF-κB) activation, thereby playing a protective role in many kinds of diseases. High-mobility group box 1 (HMGB1) has been identified as an inflammatory mediator and it might express its toxicity in a short period of time in ventilator-induced lung injury (VILI). In this study, C57BL/6 mice were randomly divided into four groups (n = 10): control group and control with SQV group (Con + SQV) were spontaneous breath...
October 1, 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/28947666/impaired-lung-repair-during-neutropenia-can-be-reverted-by-matrix-metalloproteinase-9
#2
Jorge Blázquez-Prieto, Inés López-Alonso, Laura Amado-Rodríguez, Covadonga Huidobro, Adrián González-López, Wolfgang M Kuebler, Guillermo M Albaiceta
BACKGROUND: Neutrophils may cause tissue disruption during migration and by releasing cytotoxic molecules. However, the benefits of neutrophil depletion observed in experimental models of lung injury do not correspond with the poor outcome of neutropenic patients. METHODS: To clarify the role of neutrophils during repair, mice with ventilator induced lung injury (VILI) were rendered neutropenic after damage, and followed for 48 hours of spontaneous breathing. Lungs were harvested and inflammatory mediators and matrix metalloproteinases measured...
September 25, 2017: Thorax
https://www.readbyqxmd.com/read/28936967/-effect-of-sedation-on-respiratory-function-of-patients-undergoing-mechanical-ventilation
#3
Jie Yang, Yan Kang
Sedation and analgesia for ventilated patients is an important treatment in intensive care unit (ICU). Patients receiving mechanical ventilation therapy comfortably and safely can improve patient-ventilator synchrony, reduce ventilation-related lung injury (VILI), improve compliance, decrease oxygen consumption and stress, prevent accidents, and reduce the incidence of complications and mortality in critical patients. Although sedation may protect lung function, it also has a greater impact on respiratory function...
September 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28930639/50-years-of-research-in-ards-tidal-volume-selection-in-the-acute-respiratory-distress-syndrome
#4
Sarina K Sahetya, Jordi Mancebo, Roy G Brower
Mechanical ventilation (MV) is critical in the management of many patients with the acute respiratory distress syndrome (ARDS). However, MV can also cause ventilator-induced lung injury (VILI). The selection of an appropriate tidal volume is an essential part of a lung-protective MV strategy. Since the publication of a large randomized clinical trial demonstrating the benefit of lower tidal volumes, the use of tidal volumes of 6 mL/kg predicted body weight (PBW, based on sex and height) has been recommended in clinical practice guidelines...
September 20, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28904482/mathematics-of-ventilator-induced-lung-injury
#5
REVIEW
Ubaidur Rahaman
Ventilator-induced lung injury (VILI) results from mechanical disruption of blood-gas barrier and consequent edema and releases of inflammatory mediators. A transpulmonary pressure (PL) of 17 cmH2O increases baby lung volume to its anatomical limit, predisposing to VILI. Viscoelastic property of lung makes pulmonary mechanics time dependent so that stress (PL) increases with respiratory rate. Alveolar inhomogeneity in acute respiratory distress syndrome acts as a stress riser, multiplying global stress at regional level experienced by baby lung...
August 2017: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/28888974/nanofibrillar-cellulose-hydrogels-and-reconstructed-hydrogels-as-matrices-for-controlled-drug-release
#6
Heli Paukkonen, Mikko Kunnari, Patrick Laurén, Tiina Hakkarainen, Vili-Veli Auvinen, Timo Oksanen, Raili Koivuniemi, Marjo Yliperttula, Timo Laaksonen
Concentrated 3% and 6.5% anionic nanofibrillar cellulose (ANFC) hydrogels were introduced as matrix reservoirs for controlled delivery applications of small molecules and proteins. A further aim was to study how the freeze-drying and subsequent rehydration of ANFC hydrogel affects the rheological properties and drug release of selected model compounds from the reconstructed hydrogels. It was demonstrated that the 3% and 6.5% ANFC hydrogels can be freeze-dried with suitable excipients into highly porous aerogel structures and redispersed back into the hydrogel form without significant change in the rheological properties...
September 6, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28886582/protective-effects-of-ghrelin-in-ventilator-induced-lung-injury-in-rats
#7
Guang Li, Jiao Liu, Wen-Fang Xia, Chen-Liang Zhou, Li-Qiong Lv
Ghrelin has exhibited potent anti-inflammatory effects on various inflammatory diseases. The aim of this study was to investigate the potential effects of ghrelin on a model of ventilator-induced lung injury (VILI) established in rats. Male Sprague-Dawley rats were randomly divided into three groups: low volume ventilation (LV, Vt=8ml/kg) group, a VILI group (Vt=30ml/kg), and a VILI group pretreated with ghrelin (GH+VILI). For the LV group, for the VILI and GH+VILI groups, the same parameters were applied except the tidal volume was increased to 40ml/kg...
September 5, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28882955/differential-expression-of-aquaporins-in-experimental-models-of-acute-lung-injury
#8
Alice G Vassiliou, Nikolaos Manitsopoulos, Matina Kardara, Nikolaos A Maniatis, Stylianos E Orfanos, Anastasia Kotanidou
AIM: The mammalian lung expresses at least three aquaporin (AQP) water channels whose precise role in lung injury or inflammation is still controversial. MATERIALS AND METHODS: Three murine models of lung inflammation and corresponding controls were used to evaluate the expression of Aqp1, Aqp4, Aqp5 and Aqp9: lipopolysaccharide (LPS)-induced lung injury; HCl-induced lung injury; and ventilation-induced lung injury (VILI). RESULTS: All models yielded increased lung vascular permeability, and inflammatory cell infiltration in the broncho-alveolar lavage fluid; VILI additionally produced altered lung mechanics...
September 2017: In Vivo
https://www.readbyqxmd.com/read/28881547/-health-economic-evaluation-of-bivalent-human-papilloma-virus-vaccine-in-china-based-on-the-dynamic-model
#9
X B Song, Q J Zhao, Z Zhou, Y Fang
Objective: This study aims to evaluate the prevention effect and cost-effectiveness of a prophylactic bivalent human papilloma virus (HPV) vaccine. Methods: A multiple health status dynamic model was developed, including natural history of diseases and prevention strategies. We built 19 prevention strategies including visual inspection with acetic acid/lugol's iodine (VIA/VILI) and/or 3 does prophylactic bivalent HPV vaccine administered to adolescent girls at the age of 15 years old every year under the assumption that vaccine coverage and screening coverage were 70%...
September 6, 2017: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/28828365/recruitment-maneuvers-in-acute-respiratory-distress-syndrome
#10
REVIEW
Jean-Michel Constantin, Thomas Godet, Matthieu Jabaudon, Jean-Etienne Bazin, Emmanuel Futier
The rationale for the use of recruitment maneuvers (RMs) in acute respiratory distress syndrome (ARDS) is to promote alveolar recruitment, leading to an increased end-expiratory lung volume and thus decreased ventilator-induced lung injury (VILI). RMs consists of a transient increase in transpulmonary pressure that can re-open previously collapsed alveoli. RMs represents a physiological response to lung aggression in different conditions by re-opening the collapsed part of the lung and decreasing lung oedema...
July 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28828362/tidal-volume-in-acute-respiratory-distress-syndrome-how-best-to-select-it
#11
REVIEW
Michele Umbrello, Antonella Marino, Davide Chiumello
Mechanical ventilation is the type of organ support most widely provided in the intensive care unit. However, this form of support does not constitute a cure for acute respiratory distress syndrome (ARDS), as it mainly works by buying time for the lungs to heal while contributing to the maintenance of vital gas exchange. Moreover, it can further damage the lung, leading to the development of a particular form of lung injury named ventilator-induced lung injury (VILI). Experimental evidence accumulated over the last 30 years highlighted the factors associated with an injurious form of mechanical ventilation...
July 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28828361/driving-pressure-and-mechanical-power-new-targets-for-vili-prevention
#12
REVIEW
Tommaso Tonetti, Francesco Vasques, Francesca Rapetti, Giorgia Maiolo, Francesca Collino, Federica Romitti, Luigi Camporota, Massimo Cressoni, Paolo Cadringher, Michael Quintel, Luciano Gattinoni
Several factors have been recognized as possible triggers of ventilator-induced lung injury (VILI). The first is pressure (thus the 'barotrauma'), then the volume (hence the 'volutrauma'), finally the cyclic opening-closing of the lung units ('atelectrauma'). Less attention has been paid to the respiratory rate and the flow, although both theoretical considerations and experimental evidence attribute them a significant role in the generation of VILI. The initial injury to the lung parenchyma is necessarily mechanical and it could manifest as an unphysiological distortion of the extracellular matrix and/or as micro-fractures in the hyaluronan, likely the most fragile polymer embedded in the matrix...
July 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28828360/transpulmonary-pressure-importance-and-limits
#13
REVIEW
Domenico Luca Grieco, Lu Chen, Laurent Brochard
Transpulmonary pressure (PL) is computed as the difference between airway pressure and pleural pressure and separates the pressure delivered to the lung from the one acting on chest wall and abdomen. Pleural pressure is measured as esophageal pressure (PES) through dedicated catheters provided with esophageal balloons. We discuss the role of PL in assessing the effects of mechanical ventilation in patients with acute respiratory distress syndrome (ARDS). In the supine position, directly measured PL represents the pressure acting on the alveoli and airways...
July 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28820414/-identification-of-causes-of-early-pregnancy-losses-according-to-hystomorphologic-features
#14
K Gotsiridze, N Kintraia, M Pailodze, T Gogia, F Tsaava
Retrospective analysis of the early spontaneous abortions has been conducted (486 cases). Histomorphologic analysis of the curettage material contents erveledinvolutive-regressive developmental chsnges in 108 (22,28%) cases, in 370 cases (77.78%) pathologic changes, like inflammatory changes of deciduas and chorionic villis in 302 cases (80.2%), pathologic prematurity of chorionic vili in 48 cases (12.6%), hydatidiform mole in 28 cases (7.4%). As most cases of pregnancy loss has been reported at 7-9 weeks /172 cases/, we compared histomorphologic data revealed at 7-8 (71 cases) weeks to 5-6 (135 cases) and 10-12 weeks of gestation...
July 2017: Georgian Medical News
https://www.readbyqxmd.com/read/28800250/ventilator-induced-lung-injury-follow-the-right-direction-another-piece-of-the-puzzle-in-the-vili-epic
#15
Antoine Vieillard-Baron, Didier Dreyfuss
No abstract text is available yet for this article.
August 11, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28795839/adverse-heart-lung-interactions-in-ventilator-induced-lung-injury
#16
Bhushan H Katira, Regan E Giesinger, Doreen Engelberts, Diana Zabini, Alik Kornecki, Gail Otulakowski, Takeshi Yoshida, Wolfgang M Kuebler, Patrick J McNamara, Kim A Connelly, Brian P Kavanagh
RATIONALE: The original in vivo study of ventilator-induced lung injury by Webb and Tierney (1974) reported that high VT with zero PEEP caused overwhelming lung injury, subsequently shown by others to be due to lung shear stress. OBJECTIVE: To reproduce the lung injury and edema in the 'Webb and Tierney' study and investigate the mechanism. METHODS: Sprague-Dawley rats (≈400 g) received mechanical ventilation for 60 min according to the protocol of Webb and Tierney (14/0, 30/0, 45/10, 45/0 cmH2O)...
August 10, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28790867/cervical-cancer-screening-in-low-resource-settings-a-smartphone-image-application-as-an-alternative-to-colposcopy
#17
Caroline Gallay, Anne Girardet, Manuela Viviano, Rosa Catarino, Anne-Caroline Benski, Phuong Lien Tran, Christophe Ecabert, Jean-Philippe Thiran, Pierre Vassilakos, Patrick Petignat
BACKGROUND: Visual inspection after application of acetic acid (VIA) and Lugol's iodine (VILI) is a cervical cancer (CC) screening approach that has recently been adopted in low- and middle-income countries (LMIC). Innovative technologies allow the acquisition of consecutive cervical images of VIA and VILI using a smartphone application. The aim of this study was to evaluate the quality of smartphone images in order to assess the feasibility and usability of a mobile application for CC screening in LMIC...
2017: International Journal of Women's Health
https://www.readbyqxmd.com/read/28776110/association-between-risky-sexual-behavior-and-cervical-cancer-screening-among-women-in-kenya-a-population-based-study
#18
Zelalem T Haile, Caroline Kingori, Bhakti Chavan, John Francescon, Asli K Teweldeberhan
Women residing in Eastern Africa are disproportionately affected by cervical cancer. Previous studies have identified risky sexual behavior as a major risk factor for cervical cancer. However, population-based studies examining the relationship between sexual behavior and cervical cancer screening are currently lacking. This descriptive cross-sectional study utilized nationally representative secondary data from the 2014 Kenya Demographic and Health Survey (n = 6104) to examine the association between risky sexual behavior and cervical cancer screening among sexually active women...
August 3, 2017: Journal of Community Health
https://www.readbyqxmd.com/read/28765901/mir-127-contributes-to-ventilator-induced-lung-injury
#19
Qian Li, Ya-Li Ge, Min Li, Xiang-Zhi Fang, Yan-Ping Yuan, Lei Liang, Shao-Qiang Huang
Although it is essential in critical care medicine, mechanical ventilation often results in ventilator‑induced lung injury (VILI). Treating mice with lipopolysaccharide has been reported to upregulate the expression of miR‑127, which has been implicated in the modulation of immune responses. However, the putative roles of miR‑127 during the development of VILI have yet to be elucidated. The present study demonstrated that challenging mice with mechanical ventilation for 6 h significantly upregulated the expression of miR‑127 in bronchoalveolar lavage fluid, serum and lung tissue samples...
October 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28736528/linking-ventilator-injury-induced-leak-across-the-blood-gas-barrier-to-derangements-in-murine-lung-function
#20
Bradford J Smith, Elizabeth Bartolak-Suki, Bela Suki, Gregory S Roy, Katharine L Hamlington, Chantel M Charlebois, Jason H T Bates
Mechanical ventilation is vital to the management of acute respiratory distress syndrome, but it frequently leads to ventilator-induced lung injury (VILI). Understanding the pathophysiological processes involved in the development of VILI is an essential prerequisite for improving lung-protective ventilation strategies. The goal of this study was to relate the amount and nature of material accumulated in the airspaces to biomarkers of injury and the derecruitment behavior of the lung in VILI. Forty-nine BALB/c mice were mechanically ventilated with combinations of tidal volume and end-expiratory pressures to produce varying degrees of overdistension and atelectasis while lung function was periodically assessed...
2017: Frontiers in Physiology
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