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https://www.readbyqxmd.com/read/28545208/spatio-temporal-analysis-of-particulate-matter-intake-fractions-for-vehicular-emissions-hourly-variation-by-micro-environments-in-the-greater-toronto-and-hamilton-area-canada
#1
Weeberb J Requia, Matthew D Adams, Altaf Arain, Petros Koutrakis, Wan-Chen Lee, Mark Ferguson
Previous investigations have reported intake fraction (iF) for different environments, which include ambient concentrations (outdoor exposure) and microenvironments (indoor exposure). However, little is known about iF variations due to space-time factors, especially in microenvironments. In this paper, we performed a spatio-temporal analysis of particulate matter (PM2.5) intake fractions for vehicular emissions. Specifically, we investigated hourly variation (12:00am-11:00pm) by micro-environments (residences and workplaces) in the Greater Toronto and Hamilton Area (GTHA), Canada...
May 20, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28544997/exposure-to-ultrafine-particles-in-different-transport-modes-in-the-city-of-rome
#2
Mario Grana, Nicola Toschi, Laura Vicentini, Antonio Pietroiusti, Andrea Magrini
There is evidence of adverse health impacts from human exposure to particulate air pollution, including increased rates of respiratory and cardiovascular illness, hospitalizations, and pre-mature mortality. Most recent hypotheses assign an important role to ultrafine particles (UFP) (<0.1 μm) and to associated transition metals (in particular Fe). In a large city like Rome, where many active people spend more than one hour per day in private or public transportation, it may be important to evaluate the level of exposure to harmful pollutants which occurs during urban travelling...
May 22, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28544250/prevalence-of-and-risk-factors-for-intraoperative-gastroesophageal-reflux-and-postanesthetic-vomiting-and-diarrhea-in-dogs-undergoing-general-anesthesia
#3
Carlos Torrente, Isabel Vigueras, Edgar G Manzanilla, Cecilia Villaverde, Laura Fresno, Bibiana Carvajal, Marina Fiñana, Cristina Costa-Farré
OBJECTIVE: To determine the prevalence of intraoperative gastroesophageal reflux (GER) and postanesthetic vomiting and diarrhea, and to evaluate risk factors associated with these gastrointestinal disorders (GID) in dogs undergoing general anesthesia. DESIGN: Prospective observational study. SETTING: University teaching hospital. ANIMALS: Two hundred thirty-seven client-owned dogs undergoing general inhalant anesthesia for diagnostic or surgical purposes...
May 23, 2017: Journal of Veterinary Emergency and Critical Care
https://www.readbyqxmd.com/read/28543931/severe-asthma-in-children
#4
REVIEW
Andrew Bush, Louise Fleming, Sejal Saglani
Most children with asthma have their disease easily controlled if low-dose inhaled corticosteroids (ICSs) are regularly and correctly administered. If a child presents with asthma which is apparently resistant to therapy with high-dose ICS and other controllers, then they have problematic severe asthma. However, in light of the UK National Review of Asthma Deaths, definitions of severe asthma based solely on the levels of prescribed treatment are too narrow. A detailed assessment of all such children should be performed...
May 25, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28543813/inhaled-pulmonary-vasodilator-therapy-for-management-of-right-ventricular-dysfunction-after-left-ventricular-assist-device-placement-and-cardiac-transplantation
#5
Leah A Sabato, David M Salerno, Jeremy D Moretz, Douglas L Jennings
Right ventricular failure (RVF) after cardiac transplant (CTX) or implantation of a continuous-flow left ventricular assist device (CF-LVAD) is associated with significant post-operative morbidity and mortality. A variety of modalities have been used to treat post-operative RVF, including management of volume status, intravenous inotropes and vasodilators, and right-sided mechanical support. Inhaled vasodilator agents are a unique treatment option aimed at minimizing systemic absorption by delivering therapy directly to the pulmonary vasculature...
May 24, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28542286/clinical-impact-of-chronic-obstructive-pulmonary-disease-on-non-cystic-fibrosis-bronchiectasis-a-study-on-1-790-patients-from-the-spanish-bronchiectasis-historical-registry
#6
David De la Rosa, Miguel-Angel Martínez-Garcia, Rosa Maria Giron, Montserrat Vendrell, Casilda Olveira, Luis Borderias, Luis Maiz, Antoni Torres, Eva Martinez-Moragon, Olga Rajas, Francisco Casas, Rosa Cordovilla, Javier de Gracia
BACKGROUND: Few studies have evaluated the coexistence of bronchiectasis (BE) and chronic obstructive pulmonary disease (COPD) in series of patients diagnosed primarily with BE. The aim of this study was to analyse the characteristics of patients with BE associated with COPD included in the Spanish Bronchiectasis Historical Registry and compare them to the remaining patients with non-cystic fibrosis BE. METHODS: We conducted a multicentre observational study of historical cohorts, analysing the characteristics of 1,790 patients who had been included in the registry between 2002 and 2011...
2017: PloS One
https://www.readbyqxmd.com/read/28542166/indoor-secondhand-tobacco-smoke-and-risk-of-under-five-mortality-in-23-sub-saharan-africa-countries-a-population-based-study-and-meta-analysis
#7
Patrick Opiyo Owili, Miriam Adoyo Muga, Wen-Chi Pan, Hsien-Wen Kuo
BACKGROUND: Inhalation of secondhand smoke from tobacco results in serious health outcomes among under-five children, and yet, few studies have assessed its effect on under-five mortality. We investigated the association between frequency of exposure to household tobacco smoke and risk of under-five mortality in sub-Saharan Africa (SSA). METHODS: Demographic Health Survey data of under-five children from 23 SSA countries (n = 787,484) were used. Cox proportional hazard models described the association between exposure to tobacco smoke and the risk of under-five mortality in each country, with age as the time-to-event indicator...
2017: PloS One
https://www.readbyqxmd.com/read/28542132/inhibition-of-sdf-1-receptors-cxcr4-and-cxcr7-attenuates-acute-pulmonary-inflammation-via-the-adenosine-a2b-receptor-on-blood-cells
#8
Franziska Magdalena Konrad, Nadine Meichssner, Annette Bury, Kristian-Christos Ngamsri, Jörg Reutershan
Acute pulmonary inflammation is characterized by migration of polymorphonuclear neutrophils into the different compartments of the lung. Recent studies showed evidence that the chemokine stromal cell-derived factor (SDF)-1 and its receptors CXCR4 and CXCR7 influence migration of immune cells and their activity was linked to adenosine concentrations. We investigated the particular role of CXCR4- and CXCR7-inhibition and the potential link to the adenosine A2B-receptor, which plays an important anti-inflammatory role in the lung...
May 25, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28541666/unveiling-the-molecular-structure-of-pulmonary-surfactant-corona-on-nanoparticles
#9
Qinglin Hu, Xuan Bai, Guoqing Hu, Yi Y Zuo
The growing risk of human exposure to airborne nanoparticles (NPs) causes a general concern on the biosafety of nanotechnology. Inhaled NPs can deposit in the deep lung at which interacting with the pulmonary surfactant (PS). Despite the increasing study of nano-bio interactions, detailed molecular mechanisms by which inhaled NPs interact with the natural PS system remain unclear. Using coarse-grained molecular dynamics simulation, we studied the interaction between NPs and the PS system in the alveolar fluid...
May 25, 2017: ACS Nano
https://www.readbyqxmd.com/read/28541489/respiratory-effects-and-systemic-stress-response-following-acute-acrolein-inhalation-in-rats
#10
Samantha J Snow, Marie A McGee, Andres Henriquez, Judy E Richards, Mette C Schladweiler, Allen D Ledbetter, Urmila P Kodavanti
Previous studies have demonstrated that exposure to the pulmonary irritant ozone causes myriad systemic metabolic and pulmonary effects attributed to sympathetic and hypothalamus-pituitary-adrenal (HPA) axis activation, which are exacerbated in metabolically-impaired models. We examined respiratory and systemic effects following exposure to a sensory irritant acrolein to elucidate the systemic and pulmonary consequences in healthy and diabetic rat models. Male Wistar and Goto Kakizaki (GK) rats, a non-obese type II diabetic Wistar-derived model, were exposed by inhalation to 0, 2, or 4 ppm acrolein, 4h/day for 1 or 2 days...
May 24, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28541256/modulation-of-brainstem-activity-and-connectivity-by-respiratory-gated-auricular-vagal-afferent-nerve-stimulation-in-migraine-patients
#11
Ronald G Garcia, Richard L Lin, Jeungchan Lee, Jieun Kim, Riccardo Barbieri, Roberta Sclocco, Ajay D Wasan, Robert R Edwards, Bruce R Rosen, Nouchine Hadjikhani, Vitaly Napadow
Migraine pathophysiology includes altered brainstem excitability, and recent neuromodulatory approaches aimed at controlling migraine episodes have targeted key brainstem relay and modulatory nuclei. In this study, we evaluated the impact of respiratory-gated auricular vagal afferent nerve stimulation (RAVANS), a novel neuromodulatory intervention based on an existing transcutaneous vagus nerve stimulation approach, in the modulation of brainstem activity and connectivity in migraine patients. We applied 3T-functional magnetic resonance imaging with improved in-plane spatial resolution (2...
April 25, 2017: Pain
https://www.readbyqxmd.com/read/28540844/a-6-month-safety-and-efficacy-study-of-fluticasone-propionate-and-fluticasone-propionate-salmeterol-multidose-dry-powder-inhalers-in-persistent-asthma
#12
L Mansfield, G Yiu, A Sakov, S Liu, C Caracta
BACKGROUND: A novel multidose dry powder inhaler (MDPI) that is breath actuated, easy, and intuitive to use has beendeveloped for administering fluticasone propionate (Fp) and Fp/salmeterol (FS). OBJECTIVE: To assess the safety and efficacy of Fp MDPI versus Fp hydrofluoroalkane (HFA) and FS MDPI versus FS dry-powder inhaler (DPI). METHODS: This phase III, 26-week, open-label, active drug-controlled study enrolled subjects 12 years old with persistentasthma...
May 24, 2017: Allergy and Asthma Proceedings:
https://www.readbyqxmd.com/read/28540736/effects-of-diesel-exhaust-on-cardiovascular-function-and-oxidative-stress
#13
Simon Wilson, Mark R Miller, David E Newby
SIGNIFICANCE: Air pollution is a major global health concern with the particulate matter (PM) being especially associated with marked increases in cardiovascular morbidity and mortality. Diesel exhaust emissions are a particularly rich source of the smallest sizes of PM ("fine" and "ultrafine") in urban environments, and it is these particles that are believed to be the most detrimental to cardiovascular health. Recent Advances: Controlled exposure studies to diesel exhaust in animals and man demonstrate alterations in blood pressure, heart rate, vascular tone, endothelial function, myocardial perfusion, thrombosis, atherogenesis and plaque stability...
May 25, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28540501/morphometric-characterization-of-rat-and-human-alveolar-macrophage-cell-models-and-their-response-to-amiodarone-using-high-content-image-analysis
#14
Ewelina Hoffman, Aateka Patel, Doug Ball, Jan Klapwijk, Val Millar, Abhinav Kumar, Abigail Martin, Rhamiya Mahendran, Lea Ann Dailey, Ben Forbes, Victoria Hutter
PURPOSE: Progress to the clinic may be delayed or prevented when vacuolated or "foamy" alveolar macrophages are observed during non-clinical inhalation toxicology assessment. The first step in developing methods to study this response in vitro is to characterize macrophage cell lines and their response to drug exposures. METHODS: Human (U937) and rat (NR8383) cell lines and primary rat alveolar macrophages obtained by bronchoalveolar lavage were characterized using high content fluorescence imaging analysis quantification of cell viability, morphometry, and phospholipid and neutral lipid accumulation...
May 24, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28540500/effect-of-relative-humidity-on-bipolar-electrostatic-charge-profiles-of-dry-powder-aerosols
#15
Jiaqi Yu, Jennifer Wong, Ari Ukkonen, Jonna Kannosto, Hak-Kim Chan
PURPOSE: This work investigated the effect of relative humidity (RH) on bipolar electrostatic charge profiles of dry powder inhaler aerosols using the Bipolar Charge Analyzer (BOLAR). METHODS: Two commercial products, Pulmicort® (400 μg, budesonide) and Bricanyl® (500 μg, terbutaline sulfate) Turbuhaler®, were used as model dry powder inhalers (DPIs) in this study. Three individual doses from each Turbuhaler® were sampled at 15, 40, 65 and 90% RH. Subsequently, charge and mass profiles were determined for each dispersion...
May 24, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28539224/inhaled-enac-antisense-oligonucleotide-ameliorates-cystic-fibrosis-like-lung-disease-in-mice
#16
Jeff R Crosby, Chenguang Zhao, Chong Jiang, Dong Bai, Melanie Katz, Sarah Greenlee, Hiroshi Kawabe, Michael McCaleb, Daniela Rotin, Shuling Guo, Brett P Monia
BACKGROUND: Epithelial sodium channel (ENaC, Scnn1) hyperactivity in the lung leads to airway surface dehydration and mucus accumulation in cystic fibrosis (CF) patients and in mice with CF-like lung disease. METHODS: We identified several potent ENaC specific antisense oligonucleotides (ASOs) and tested them by inhalation in mouse models of CF-like lung disease. RESULTS: The inhaled ASOs distributed into lung airway epithelial cells and decreased ENaC expression by inducing RNase H1-dependent degradation of the targeted Scnn1a mRNA...
May 20, 2017: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/28538776/spontaneous-pneumomediastinum-experience-in-18-patients-during-the-last-12-years
#17
Patrícia Dionísio, Luís Martins, Susana Moreira, Alda Manique, Rita Macedo, Fátima Caeiro, Luísa Boal, Cristina Bárbara
Objective: To characterize clinically all of the patients with spontaneous pneumomediastinum (SPM) admitted to an adult pulmonology ward in Lisbon, Portugal. Methods: This was a retrospective descriptive study of all adult patients (≥ 18 years of age) diagnosed with SPM between January of 2004 and September of 2015. Results: At least one predisposing factor was identified in most (88.9%) of the 18 patients who presented with SPM during the study period...
March 2017: Jornal Brasileiro de Pneumologia: Publicaça̋o Oficial da Sociedade Brasileira de Pneumologia e Tisilogia
https://www.readbyqxmd.com/read/28538237/update-on-postnatal-steroids
#18
Henry L Halliday
Antenatal steroid treatment to enhance fetal lung maturity and surfactant treatment to prevent or treat respiratory distress syndrome have been major advances in perinatal medicine in the past 40 years contributing to improved outcomes for preterm infants. Use of postnatal steroids to prevent or treat chronic lung disease in preterm infants has been less successful and associated with adverse neurodevelopmental outcomes. Although early (in the first week of life) postnatal steroid treatment facilitates earlier extubation and reduces the risk of chronic lung disease, it is associated with adverse effects, such as hyperglycemia, hypertension, gastrointestinal bleeding and perforation, hypertrophic cardiomyopathy, growth failure, and cerebral palsy, and cannot be recommended...
2017: Neonatology
https://www.readbyqxmd.com/read/28537609/nanoparticle-induced-oxidation-of-corona-proteins-initiates-an-oxidative-stress-response-in-cells
#19
Dhanya T Jayaram, Sabiha Runa, Melissa L Kemp, Christine K Payne
Titanium dioxide nanoparticles (TiO2 NPs), used as pigments and photocatalysts, are ubiquitous in our daily lives. Previous work has observed cellular oxidative stress in response to the UV-excitation of photocatalytic TiO2 NPs. In comparison, most human exposure to TiO2 NPs takes place in the dark, in the lung following inhalation or in the gut following consumption of TiO2 NP food pigment. Our spectroscopic characterization shows that both photocatalytic and food grade TiO2 NPs, in the dark, generate low levels of reactive oxygen species (ROS), specifically hydroxyl radicals and superoxides...
May 24, 2017: Nanoscale
https://www.readbyqxmd.com/read/28537034/polycyclic-aromatic-hydrocarbons-in-urban-soil-of-novi-sad-serbia-occurrence-and-cancer-risk-assessment
#20
Biljana D Škrbić, Nataša Đurišić-Mladenović, Đorđe J Tadić, Jelena Đ Cvejanov
Contents of 16 polycyclic aromatic hydrocarbons were analyzed in 30 soil samples from 15 locations in Novi Sad, Serbia, assessing for the first time the corresponding health risks in the Serbian urban zone. Total concentrations were in the range of 22-2247 μg kg(-1), with a mean and median value of 363 and 200 μg kg(-1), respectively. Comparison with the relevant maximum allowed contents proposed by the Serbian government and with the Dutch target values implied that soils from the urban area of Novi Sad were "suitable as residential soils" and that no intervention would be needed if the current levels were retained...
May 24, 2017: Environmental Science and Pollution Research International
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