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Lung injury

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https://www.readbyqxmd.com/read/28550659/hyperoxia-provokes-a-time-and-dose-dependent-inflammatory-response-in-mechanically-ventilated-mice-irrespective-of-tidal-volumes
#1
Hendrik J F Helmerhorst, Laura R A Schouten, Gerry T M Wagenaar, Nicole P Juffermans, Joris J T H Roelofs, Marcus J Schultz, Evert de Jonge, David J van Westerloo
BACKGROUND: Mechanical ventilation and hyperoxia have the potential to independently promote lung injury and inflammation. Our purpose was to study both time- and dose-dependent effects of supplemental oxygen in an experimental model of mechanically ventilated mice. METHODS: Healthy male C57Bl/6J mice, aged 9-10 weeks, were intraperitoneally anesthetized and randomly assigned to the mechanically ventilated group or the control group. In total, 100 mice were tracheotomized and mechanically ventilated for either 8 or 12 h after allocation to different settings for the applied fractions of inspired oxygen (FiO2, 30, 50, or 90%) and tidal volumes (7...
December 2017: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/28549677/enhanced-expression-of-organic-cation-transporters-in-bronchial-epithelial-cell-layers-following-insults-associated-with-asthma-impact-on-salbutamol-transport
#2
M Mukherjee, E Cingolani, D I Pritchard, C Bosquillon
Increasing evidence suggests Organic Cation Transporters (OCT) might facilitate the absorption of inhaled bronchodilators, including salbutamol, across the lung epithelium. This is essentially scarred and inflamed in asthma. Accordingly, the impact of epithelial insults relevant to asthma on OCT expression and salbutamol transport was evaluated in air-liquid interfaced layers of the human broncho-epithelial cell line Calu-3. These were physically injured and allowed to recover for 48h or exposed to the pro-inflammatory stimulant lipopolysaccharide (LPS) for 48h and the aeroallergen house dust mite (HDM) for 8h twice over 48h...
May 23, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28549307/thymoquinone-protects-against-the-sepsis-induced-mortality-mesenteric-hypoperfusion-aortic-dysfunction-and-multiple-organ-damage-in-rats
#3
Erdem Kamil Ozer, Mustafa Tugrul Goktas, Aysun Toker, Sultan Pehlivan, Hulagu Bariskaner, Ceyhan Ugurluoglu, Alper Bektas Iskit
BACKGROUND: Thymoquinone (TQ) is a potent cytoprotective, antioxidant and anti-inflammatory agent. We aimed to investigate the possible protective effects of TQ on survival, mesenteric artery blood flow (MABF), vascular reactivity, oxidative and inflammatory injuries in a murine sepsis model induced by cecal ligation and puncture (CLP). METHODS: Wistar rats were divided into the following four groups: Sham, CLP, Sham+TQ and CLP+TQ. TQ (1mg/kg/day) or vehicle (dimethyl sulfoxide, 1mL/kg/day) was intraperitoneally injected for 3 days...
March 24, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28547381/purinergic-signalling-links-mechanical-breath-profile-and-alveolar-mechanics-with-the-pro-inflammatory-innate-immune-response-causing-ventilation-induced-lung-injury
#4
REVIEW
Djo Hasan, Paul Blankman, Gary F Nieman
Severe pulmonary infection or vigorous cyclic deformation of the alveolar epithelial type I (AT I) cells by mechanical ventilation leads to massive extracellular ATP release. High levels of extracellular ATP saturate the ATP hydrolysis enzymes CD39 and CD73 resulting in persistent high ATP levels despite the conversion to adenosine. Above a certain level, extracellular ATP molecules act as danger-associated molecular patterns (DAMPs) and activate the pro-inflammatory response of the innate immunity through purinergic receptors on the surface of the immune cells...
May 26, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28546377/respiratory-care-considerations-in-the-childhood-cancer-patient
#5
Lama Elbahlawan, K Jason Rains, Dennis C Stokes
This article reviews the common pulmonary complications seen in the pediatric oncology population and our approach to diagnosis, management, and therapy considerations in this specialized population, including patients receiving chemotherapy, radiation, and hematopoietic stem cell transplantation. Although infections cause the most significant complications in this population, non-infectious complications, including acute lung injury from chemotherapy or radiation, idiopathic interstitial pneumonia, diffuse alveolar hemorrhage, bronchiolitis obliterans, and cryptogenic organizing pneumonia, also occur commonly...
June 2017: Respiratory Care
https://www.readbyqxmd.com/read/28546375/extracorporeal-membrane-oxygenation-for-severe-pediatric-respiratory-failure
#6
John C Lin
Extracorporeal membrane oxygenation (ECMO) was developed initially in the 1960s to support refractory respiratory failure in addition to the cardiac support inherent in a venoarterial bypass circuit. Early successes occurred predominantly in the neonatal population with subsequent randomized controlled trials and comprehensive reviews concluding therapeutic efficacy for ECMO in neonatal respiratory failure. In contrast, the evidence supporting ECMO for respiratory failure in children is less definitive. However, although pediatric randomized controlled trials have not been completed, sufficient evidence in support of ECMO as a beneficial therapy for pediatric respiratory failure exists...
June 2017: Respiratory Care
https://www.readbyqxmd.com/read/28546374/pediatric-ards
#7
Ira M Cheifetz
The Pediatric Acute Lung Injury Consensus Conference (PALICC) has provided the critical care community with the first pediatric-focused definition for ARDS. The PALICC recommendations provide guidance on conventional ventilator management, gas exchange goals, use of high-frequency ventilation, adjunct management approaches, and the application of extracorporeal membrane oxygenation for pediatric ARDS (PARDS). Although outcomes for PARDS have improved over the past decade, mortality and morbidity remain significant...
June 2017: Respiratory Care
https://www.readbyqxmd.com/read/28546153/impact-of-ventilation-induced-lung-injury-on-the-structure-and-function-of-lamellar-bodies
#8
Scott Milos, Reza Khazaee, Lynda A McCaig, Karen Nygard, Richard B Gardiner, Yi Y Zuo, Cory M Yamashita, Ruud A W Veldhuizen
Alterations to the pulmonary surfactant system have been observed consistently in ventilation-induced lung injury including composition changes and impairments in the surface tension reducing ability of the isolated extracellular surfactant. However, there is limited information about the effects of VILI on the intracellular form of surfactant, the lamellar body. It is hypothesized that VILI leads to alterations of lamellar bodies numbers and function. To test this hypothesis, rats were randomized to one of three groups, non-ventilated controls, control ventilation and high tidal volume ventilation (VILI)...
May 25, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28545548/circulating-microparticle-levels-are-reduced-in-patients-with-ards
#9
Ciara M Shaver, Justin Woods, Jennifer K Clune, Brandon S Grove, Nancy E Wickersham, J Brennan McNeil, Gregory Shemancik, Lorraine B Ware, Julie A Bastarache
BACKGROUND: It is unclear how to identify which patients at risk for acute respiratory distress syndrome (ARDS) will develop this condition during critical illness. Elevated microparticle (MP) concentrations in the airspace during ARDS are associated with activation of coagulation and in vitro studies have demonstrated that MPs contribute to acute lung injury, but the significance of MPs in the circulation during ARDS has not been well studied. The goal of the present study was to test the hypothesis that elevated levels of circulating MPs could prospectively identify critically ill patients who will develop ARDS and that elevated circulating MPs are associated with poor clinical outcomes...
May 25, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28545380/from-stem-cell-biology-to-the-treatment-of-lung-diseases
#10
Dorina Esendagli, Aysen Gunel-Ozcan
The exposure of lung to noxious agents or gasses leads to injury, which further enhances repair mechanisms by promoting the proliferation and differentiation of lung stem cells. These cells could help preserve the anatomical structure and the function of the organ. Unfortunately in many lung diseases 'this scenario' is changed and injury progresses despite repair mechanisms or conventional treatment. This review summarizes the research on lung stem cells by giving an overview to the biology, function, niches and signaling that play role in lung stem cells and further to the regeneration of the lung...
May 23, 2017: Current Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28545223/retraction-hsia-et-al-post-intake-of-s-ethyl-cysteine-and-s-methyl-cysteine-improved-lps-induced-acute-lung-injury-in-mice-nutrients-2016-8-507
#11
https://www.readbyqxmd.com/read/28544542/conditional-macrophage-depletion-increases-inflammation-and-does-not-inhibit-the-development-of-osteoarthritis-in-obese-mafia-mice
#12
Chia-Lung Wu, Jenna McNeill, Kelsey Goon, Dianne Little, Kelly Kimmerling, Janet Huebner, Virginia Kraus, Farshid Guilak
OBJECTIVE: Macrophages are believed to play a critical role in the inflammation associated with the development of osteoarthritis (OA) in obesity. The objective of the study was to investigate whether short-term, systemic depletion of macrophages would mitigate OA following injury in obese mice. METHODS: CSF-1R-GFP(+) Macrophage Fas-Induced Apoptosis (MaFIA) transgenic mice that allow conditional depletion of macrophages were placed on a high-fat diet and underwent surgery to induce knee OA...
May 23, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28543822/good-for-the-lung-but-bad-for-the-liver-garlic-induced-hepatotoxicity-following-liver-transplantation
#13
S A Shaikh, S Tischer, E K Choi, R J Fontana
WHAT IS KNOWN AND OBJECTIVE: Limited data exist surrounding the metabolism and safety of garlic supplements. CASE DESCRIPTION: A patient with a history of hepatopulmonary syndrome (HPS) and orthotopic liver transplantation was admitted to our surgery transplant service with severe hypoxaemia. The patient was started on high-dose Garlicin Cardio(®) (Allium sativum) for HPS and soon after had elevated liver function tests. Garlicin Cardio(®) was discontinued and liver enzymes normalized...
May 25, 2017: Journal of Clinical Pharmacy and Therapeutics
https://www.readbyqxmd.com/read/28542443/effects-of-pressure-support-and-pressure-controlled-ventilation-on-lung-damage-in-a-model-of-mild-extrapulmonary-acute-lung-injury-with-intra-abdominal-hypertension
#14
Cintia L Santos, Raquel S Santos, Lillian Moraes, Cynthia S Samary, Nathane S Felix, Johnatas D Silva, Marcelo M Morales, Robert Huhle, Marcelo G Abreu, Alberto Schanaider, Pedro L Silva, Paolo Pelosi, Patricia R M Rocco
Intra-abdominal hypertension (IAH) may co-occur with the acute respiratory distress syndrome (ARDS), with significant impact on morbidity and mortality. Lung-protective controlled mechanical ventilation with low tidal volume and positive end-expiratory pressure (PEEP) has been recommended in ARDS. However, mechanical ventilation with spontaneous breathing activity may be beneficial to lung function and reduce lung damage in mild ARDS. We hypothesized that preserving spontaneous breathing activity during pressure support ventilation (PSV) would improve respiratory function and minimize ventilator-induced lung injury (VILI) compared to pressure-controlled ventilation (PCV) in mild extrapulmonary acute lung injury (ALI) with IAH...
2017: PloS One
https://www.readbyqxmd.com/read/28542361/granulocyte-colony-stimulating-factor-blockade-enables-dexamethasone-to-inhibit-lipopolysaccharide-induced-murine-lung-neutrophils
#15
Jesus Banuelos, Yun Cao, Soon Cheon Shin, Bruce S Bochner, Pedro Avila, Shihong Li, Xin Jiang, Mark W Lingen, Robert P Schleimer, Nick Z Lu
Glucocorticoids promote neutrophilic inflammation, the mechanisms of which are poorly characterized. Using a lipopolysaccharide (LPS)-induced acute murine lung injury model, we determined the role of granulocyte colony-stimulating factor (G-CSF) in mouse lung neutrophil numbers in the absence and presence of dexamethasone, a potent glucocorticoid. G-CSF was blocked using a neutralizing antibody. Airway neutrophil numbers, cytokine levels, and lung injury parameters were measured. Glucocorticoid treatment maintained LPS-induced airway G-CSF while suppressing TNF and IL-6...
2017: PloS One
https://www.readbyqxmd.com/read/28540798/pathological-effects-of-lung-radiofrequency-ablation-that-contribute-to-pneumothorax-using-a-porcine-model
#16
Jean Izaaryene, Frederic Cohen, Philippe Souteyrand, Pierre-Henri Rolland, Vincent Vidal, Jean-Michel Bartoli, Veronique Secq, Jean-Yves Gaubert
OBJECTIVES: The incidence of pneumothorax is 7 times higher after lung radiofrequency ablation (RFA) than after lung biopsy. The reasons for such a difference have never been objectified. The histopathologic changes in lung tissue are well-studied and established for RF in the ablation zone. However, it has not been previously described what the nature of thermal injury might be along the shaft of the RF electrode as it traverses through normal lung tissue to reach the ablation zone. The purpose of this study was to determine the changes occurring around the RF needle along the pathway between the ablated zone and the pleura...
April 17, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28539439/contribution-of-human-lung-parenchyma-and-leukocyte-influx-to-oxidative-stress-and-immune-mediated-pathology-following-nipah-infection
#17
Olivier Escaffre, Tais B Saito, Terry L Juelich, Tetsuro Ikegami, Jennifer K Smith, David D Perez, Colm Atkins, Corri B Levine, Matthew B Huante, Rebecca J Nusbaum, Janice J Endsley, Alexander N Freiberg, Barry Rockx
Nipah virus (NiV) is a zoonotic emerging paramyxovirus that can cause a fatal respiratory illness or encephalitis in humans. Despite many efforts, the molecular mechanisms of NiV-induced acute lung injury (ALI) remain unclear. We previously showed that NiV replicates to high titers in human lung grafts in NOD scid gamma mice, resulting in a robust inflammatory response. Interestingly, these mice can undergo human immune system reconstitution by the Bone marrow, Liver, and Thymus (BLT) reconstitution method, in addition to lung tissue engraftment, giving altogether a realistic model to study human respiratory viral infections...
May 24, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28539038/-hepatobronchial-fistula-and-lung-abscess-after-transarterial-chemoembolization
#18
Kwanjoo Lee, Jeong Eun Song, Hyang Sook Jeong, Do Young Kim
Transarterial chemoembolization (TACE) is a common treatment modality to locally manage hepatocellular carcinoma. Liver abscess and bile duct injury are common complications of TACE. However, hepatobronchial fistula is a rare complication. Herein, we report a case of lung abscess due to hepatobronchial fistula after TACE. A 67-year-old man, who had underwent TACE 6 months ago, presented cough and bile-colored sputum. He was diagnosed with lung abscess and hepatobronchial fistula. We performed endoscopic retrograde cholangiopancreatography; however, there was no improvement in his symptoms...
May 25, 2017: Korean Journal of Gastroenterology, Taehan Sohwagi Hakhoe Chi
https://www.readbyqxmd.com/read/28538666/melatonin-attenuates-pulmonary-hypertension-in-chronically-hypoxic-rats
#19
Ming Wai Hung, Hang Mee Yeung, Chi Fai Lau, Angela Ming See Poon, George L Tipoe, Man Lung Fung
Chronic hypoxia induces pulmonary hypertension and vascular remodeling, which are clinically relevant to patients with chronic obstructive pulmonary disease (COPD) associated with a decreased level of nitric oxide (NO). Oxidative stress and inflammation play important roles in the pathophysiological processes in COPD. We examined the hypothesis that daily administration of melatonin (10 mg/kg) mitigates the pulmonary hypertension and vascular remodeling in chronically hypoxic rats. The right ventricular systolic pressure (RVSP) and the thickness of pulmonary arteriolar wall were measured from normoxic control, vehicle- and melatonin-treated hypoxic rats exposed to 10% O₂ for 14 days...
May 24, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28538649/attenuation-of-hemorrhage-associated-lung-injury-by-adjuvant-treatment-with-c23-an-oligopeptide-derived-from-cold-inducible-rna-binding-protein-cirp
#20
Fangming Zhang, Weng-Lang Yang, Max Brenner, Ping Wang
BACKGROUND: Hemorrhagic shock (HS) is an important cause of mortality. HS is associated with an elevated incidence of acute lung injury (ALI) and acute respiratory distress syndrome (ARDS), significantly contributing to HS morbidity and mortality. Cold-inducible RNA-binding protein (CIRP) is released into the circulation during HS and can cause lung injury. C23 is a CIRP-derived oligopeptide that binds with high affinity to the CIRP receptor and inhibits CIRP-induced phagocyte secretion of TNF-α...
May 22, 2017: Journal of Trauma and Acute Care Surgery
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