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Airway resistence

David Williams, Joanne L Fothergill, Benjamin Evans, Jessica Caples, Sam Haldenby, Martin J Walshaw, Michael A Brockhurst, Craig Winstanley, Steve Paterson
Pseudomonas aeruginosa chronic infections of cystic fibrosis (CF) airways are a paradigm for within-host evolution with abundant evidence for rapid evolutionary adaptation and diversification. Recently emerged transmissible strains have spread globally, with the Liverpool Epidemic Strain (LES) the most common strain infecting the UK CF population. Previously we have shown that highly divergent lineages of LES can be found within a single infection, consistent with super-infection among a cross-sectional cohort of patients...
March 16, 2018: Microbial Genomics
Guo-Ying Sun, Hui-Hui Yang, Xin-Xin Guan, Wen-Jing Zhong, Yong-Ping Liu, Ming-Yuan Du, Xiao-Qin Luo, Yong Zhou, Cha-Xiang Guan
Vasoactive intestinal peptide (VIP) is one of the most abundant neuropeptides in the lungs with various biological characters. We have reported that VIP inhibited the expressions of TREM-1 and IL-17A, which are involved in the initiation and amplification of inflammation in acute lung injury (ALI). However, the overall effect of VIP on ALI remains unknown. The aim of this study is to investigate the therapeutic effect of VIP mediated by lentivirus (Lenti-VIP) on lipopolysaccharide (LPS)-induced murine ALI. We found that the expression of intrapulmonary VIP peaked at day7 after the intratracheal injection of Lenti-VIP...
March 12, 2018: Molecular Immunology
Carol Kelly, James D Chalmers, Iain Crossingham, Nicola Relph, Lambert M Felix, David J Evans, Stephen J Milan, Sally Spencer
BACKGROUND: Bronchiectasis is a chronic respiratory disease characterised by abnormal and irreversible dilatation and distortion of the smaller airways. Bacterial colonisation of the damaged airways leads to chronic cough and sputum production, often with breathlessness and further structural damage to the airways. Long-term macrolide antibiotic therapy may suppress bacterial infection and reduce inflammation, leading to fewer exacerbations, fewer symptoms, improved lung function, and improved quality of life...
March 15, 2018: Cochrane Database of Systematic Reviews
Heather M Young, Fumin Guo, Rachel L Eddy, Geoffrey Maksym, Grace Parraga
Ventilation heterogeneity is a hallmark finding in obstructive lung disease and may be evaluated using a variety of methods including multiple-breath gas-washout and pulmonary imaging. Such methods provide an opportunity to better understand the relationships between structural and functional abnormalities in the lungs, and their relationships with important clinical outcomes. We measured ventilation heterogeneity and respiratory impedance in 100 subjects (50 asthmatics, 22 ex-smokers and 28 COPD), using oscillometry and hyperpolarized3 He magnetic resonance imaging (MRI) and determined their relationships with quality-of-life scores and disease control/exacerbations...
March 15, 2018: Journal of Applied Physiology
Israr Bin M Ibrahim, Ramana M Pidaparti, Kevin R Ward
Ventilation-induced lung injury is a common problem faced by patients with respiratory problems who require mechanical ventilation (MV). This injury may lead to a greater chance of developing or exacerbating the acute respiratory distress syndrome which further complicates the therapeutic use of MV. The chain of events begins with the MV initiating an immune response that leads to inflammation induced tissue material alteration (stiffening) and eventually the loss of lung resistance. It is clear from this sequence of events that the phenomenon of ventilation induced injury is multi-scale by nature and, hence, requires holistic analysis involving simulations and informatics...
2018: IEEE Journal of Translational Engineering in Health and Medicine
Carsten Schwarz, Patrick Vandeputte, Amandine Rougeron, Sandrine Giraud, Thomas Dugé de Bernonville, Ludovic Duvaux, Amandine Gastebois, Ana Alastruey-Izquierdo, Maria Teresa Martín-Gomez, Estrella Martin Mazuelos, Amparo Sole, Josep Cano, Javier Pemán, Guillermo Quindos, Françoise Botterel, Marie-Elisabeth Bougnoux, Sharon Chen, Laurence Delhaès, Loïc Favennec, Stéphane Ranque, Ludwig Sedlacek, Joerg Steinmann, Jose Vazquez, Craig Williams, Wieland Meyer, Solène Le Gal, Gilles Nevez, Maxime Fleury, Nicolas Papon, Françoise Symoens, Jean-Philippe Bouchara
Cystic fibrosis (CF) is the major genetic inherited disease in Caucasian populations. The respiratory tract of CF patients displays a sticky viscous mucus, which allows for the entrapment of airborne bacteria and fungal spores and provides a suitable environment for growth of microorganisms, including numerous yeast and filamentous fungal species. As a consequence, respiratory infections are the major cause of morbidity and mortality in this clinical context. Although bacteria remain the most common agents of these infections, fungal respiratory infections have emerged as an important cause of disease...
April 1, 2018: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
Julio Cesar Castellanos-Ramírez, Alvaro J Ruíz, Patricia Hidalgo-Martínez, Liliana Otero-Mendoza
Sleep studies conducted at an altitude that is different from the home altitude can yield misleading results regarding the severity of obstructive sleep apnea (OSA). The objective of the present study was to determine the sleep characteristics of a patient undergoing polysomnography (PSG) in three Colombian cities at different altitudes (Bogotá, at 2,640 m above sea level [ASL]; Bucaramanga, at 959 m ASL; and Santa Marta, at 15 m ASL). The patient was an obese man with diabetes and suspected OSA. All PSG recordings were scored and interpreted in accordance with American Academy of Sleep Medicine criteria...
January 2018: Jornal Brasileiro de Pneumologia: Publicaça̋o Oficial da Sociedade Brasileira de Pneumologia e Tisilogia
Cynthia Kanagaratham, Victoria Chiwara, Bianca Ho, Sanny Moussette, Mina Youssef, David Venuto, Lucie Jeannotte, Guillaume Bourque, Juan Bautista de Sanctis, Danuta Radzioch, Anna K Naumova
The human chromosomal region 17q12-q21 is one of the best replicated genome-wide association study loci for childhood asthma. The associated SNPs span a large genomic interval that includes several protein-coding genes. Here, we tested the hypothesis that the zona pellucida-binding protein 2 (ZPBP2) gene residing in this region contributes to asthma pathogenesis using a mouse model. We tested the lung phenotypes of knock-out (KO) mice that carry a deletion of the Zpbp2 gene. The deletion attenuated airway hypersensitivity (AHR) in female, but not male, mice in the absence of allergic sensitization...
March 13, 2018: Mammalian Genome: Official Journal of the International Mammalian Genome Society
Annalucia Carbone, Roberto Zefferino, Elisa Beccia, Valeria Casavola, Stefano Castellani, Sante Di Gioia, Valentina Giannone, Manuela Seia, Antonella Angiolillo, Carla Colombo, Maria Favia, Massimo Conese
We previously found that human amniotic mesenchymal stem cells (hAMSCs) in coculture with CF immortalised airway epithelial cells (CFBE41o- line, CFBE) on Transwell® filters acquired an epithelial phenotype and led to the expression of a mature and functional CFTR protein. In order to explore the role of gap junction- (GJ-) mediated intercellular communication (GJIC) in this rescue, cocultures (hAMSC : CFBE, 1 : 5 ratio) were studied for the formation of GJIC, before and after silencing connexin 43 (Cx43), a major component of GJs...
2018: Stem Cells International
Michael C Peters, Sheena Kerr, Eleanor M Dunican, Prescott G Woodruff, Merritt L Fajt, Bruce D Levy, Elliot Israel, Brenda R Phillips, David T Mauger, Suzy A Comhair, Serpil C Erzurum, Mats W Johansson, Nizar N Jarjour, Andrea M Coverstone, Mario Castro, Annette T Hastie, Eugene R Bleecker, Sally E Wenzel, John V Fahy
BACKGROUND: Airway type 2 inflammation is usually corticosteroid sensitive, but the role of type 2 inflammation as a mechanism of asthma in patients on high dose inhaled corticosteroids (ICS) is uncertain. OBJECTIVE: To determine if airway type 2 inflammation persists in patients treated with ICS and to evaluate the clinical features of patients with steroid resistant airway type-2 inflammation. METHODS: We used qPCR to generate a composite metric of type-2 cytokine gene expression (type 2 Gene Mean, "T2GM") in induced sputum cells from healthy controls, severe asthma patients on ICS (n=174), and non-severe asthma patients on ICS (n=85)...
March 7, 2018: Journal of Allergy and Clinical Immunology
Matthew Morten, Adam Collison, Vanessa E Murphy, Daniel Barker, Christopher Oldmeadow, John Attia, Joseph Meredith, Heather Powell, Paul D Robinson, Peter D Sly, Peter G Gibson, Joerg Mattes
BACKGROUND: The single-centre double-blind, randomised controlled Managing Asthma in Pregnancy (MAP) trial in Newcastle, Australia, compared a treatment algorithm using the fraction of exhaled nitric oxide (FeNO) in combination with asthma symptoms (FeNO group) against a treatment algorithm using clinical symptoms only (clinical group) in pregnant asthmatic women (ANZ Clinical Trials Registry, number 12607000561482). The primary outcome was a 50% reduction in asthma exacerbations during pregnancy in the FeNO group...
March 7, 2018: Journal of Allergy and Clinical Immunology
Whittney A Warren, Domingo Franco-Palacios, Christopher S King, Oksana A Shlobin, Steven D Nathan, Shalika B Katugaha, Haresh Mani, A Whitney Brown
A 24-year-old woman with ΔF508/Y1092X cystic fibrosis (CF) complicated by severe obstructive lung disease (FEV1 of 30% predicted) was admitted for IV antibiotics for planned sinus surgery resulting from severe chronic sinusitis causing frequent exacerbations and declining lung function. She had persistent airway infection with multidrug-resistant Pseudomonas aeruginosa, methicillin-resistant Staphylococcus aureus, and growth of a fungus presumed to be an airway colonizer, identified as Stephanoascus ciferrii 1 year before presentation...
March 2018: Chest
Lingchen Kong, Jianzhong Li, Peng Wu, Jianhua Xu, Honglei Li, Haifei Long, Pan Liu, Fangfang Wei, Wenhong Peng
OBJECTIVE: To investigate the curative effect of lateral position ventilation combined with vibration sputum drainage on the patients with acute respiratory distress syndrome (ARDS). METHODS: A prospective randomized controlled trial was conducted. The patients with ARDS undergoing mechanical ventilation (MV) admitted to intensive care unit (ICU) of Linyi Central Hospital from January 2013 to June 2017 were enrolled, and they were divided into simple ventilation group and combined treatment group according to random number table...
March 2018: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
Charitharth Vivek Lal, Nelida Olave, Colm Travers, Gabriel Rezonzew, Kalsang Dolma, Alexandra Simpson, Brian Halloran, Zubair Aghai, Pragnya Das, Nirmal Sharma, Xin Xu, Kristopher Genschmer, Derek Russell, Tomasz Szul, Nengjun Yi, J Edwin Blalock, Amit Gaggar, Vineet Bhandari, Namasivayam Ambalavanan
Premature infants are at high risk for developing bronchopulmonary dysplasia (BPD), characterized by chronic inflammation and inhibition of lung development, which we have recently identified as being modulated by microRNAs (miRNAs) and alterations in the airway microbiome. Exosomes and exosomal miRNAs may regulate cell differentiation and tissue and organ development. We discovered that tracheal aspirates from infants with severe BPD had increased numbers of, but smaller, exosomes compared with term controls...
March 8, 2018: JCI Insight
Vera Spatenkova, Ondrej Bradac, Daniela Fackova, Zdenka Bohunova, Petr Suchomel
BACKGROUND: Nosocomial infection (NI) control is an important issue in neurocritical care due to secondary brain damage and the increased morbidity and mortality of primary acute neurocritical care patients. The primary aim of this study was to determine incidence of nosocomial infections and multidrug-resistant bacteria and seek predictors of nosocomial infections in a preventive multimodal nosocomial infection protocol in the neurointensive care unit (NICU). The secondary aim focused on their impact on stay, mortality and cost in the NICU...
March 7, 2018: BMC Neurology
Qi Gao, Huijie Huang, Kang Zhu, Xiaoying Liu, Xiaoling Hou, Hui Guan, Yongge Liu, Deli Xin, Li Xiang, Kunling Shen, Xin Ni
In the current study, we sought to track the clinical course of children under control-based asthma management and focused on respiratory pathogens monitoring. We prospectively explored influencing factors for asthma control. 121 children with uncontrolled asthma between 3-14 years of age were recruited. Common respiratory pathogens were detected with pharyngeal swabs and serum aeroallergen-specific IgE was measured. Numeric asthma control scores, airway resistance and fractional concentrations of exhaled nitric oxide (FENO) were evaluated...
February 2018: Iranian Journal of Allergy, Asthma, and Immunology
Felipe Vilaça Cavallari Machado, Fabio Pitta, Nidia Aparecida Hernandes, Gisele Lopes Bertolini
PURPOSE: Chronic obstructive pulmonary disease (COPD) is characterized by persistent and progressive airflow obstruction that is associated with an abnormal chronic inflammatory response in the airways and lungs to noxious particles. COPD often leads to physical inactivity and deconditioning that added to inappropriate/excessive inflammatory responses leads to systemic consequences. Studies have shown that metabolic syndrome and manifested diabetes are more frequent in COPD than in healthy subjects; a possible explanation is that different pathophysiological aspects of COPD can lead to insulin resistance...
March 6, 2018: Endocrine
Gul Gursel, Avsar Zerman, Burcu Basarik, Kamil Gonderen, Muge Aydogdu, Serriyye Memmedova
Auto-titrating noninvasive ventilation (NIV) has been developed as a new mode applying variable expiratory-positive airway pressure (EPAP) in addition to variable inspiratory pressures (IPAP), both to deliver targeted tidal volume (VT) and to eliminate upper airway resistance. The purpose of this study is to evaluate whether NIV with auto-titrating mode will decrease more PaCO2 within a shorter time compared to volume-assured mode in hypercapnic intensive care unit (ICU) patients. The hypercapnic respiratory failure patients treated with average volume assured pressure support- automated EPAP mode (group1) were compared with those treated with average volume-assured pressure support mode (group2)...
March 6, 2018: Internal and Emergency Medicine
Bao-Juan Zhang, Hai-Tao Tian, Hai-Ou Li, Jian Meng
The objective of the present study was to explore the effects of different one-lung ventilation (OLV) modes on lung function in elderly patients undergoing esophageal cancer surgery. A total of 180 consecutive elderly patients (ASA Grades I-II, with OLV indications) undergoing elective surgery were recruited in the study. Patients were randomly divided into 4 groups (n = 45). In Group A, patients received low tidal volume (VT < 8 mL/kg) + pressure controlled ventilation (PCV), low tidal volume (VT < 8 mL/kg) + volume-controlled ventilation (VCV) in Group B, high tidal volume (VT ≥ 8 mL/kg) + PCV in Group C and high tidal volume (VT ≥ 8 mL/kg) + VCV in Group D...
January 2018: Medicine (Baltimore)
Katarzyna Garbacz, Lidia Piechowicz, Magdalena Podkowik, Aneta Mroczkowska, Joanna Empel, Jacek Bania
Background: The aim of this study was to assess the relatedness of molecular types of Staphylococcus aureus isolates colonizing cystic fibrosis (CF) patients with their antimicrobial resistance and prevalence of toxin genes. Methods: A total of 215 isolates from the airways of 107 patients with CF were tested for spa and SCC mec type, antimicrobial resistance and carriage of toxin genes. Results: t015, t084, t091, t700 and t002 were the largest group (approximately 25%) among all 69 identified spa types...
2018: Infection and Drug Resistance
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