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https://www.readbyqxmd.com/read/29447461/genetic-ablation-of-p16-ink4a-does-not-protect-against-cellular-senescence-in-mouse-models-of-copd-emphysema
#1
Isaac K Sundar, Kahkashan Rashid, Janice Gerloff, Dongmei Li, Irfan Rahman
Cigarette smoke (CS) affects DNA damage and cellular senescence signaling pathways in the pathogenesis of chronic obstructive pulmonary disease (COPD). p16(INK4a) (p16: a cyclin-dependent kinase inhibitor) is a key marker of cellular senescence, which is induced by CS in lung cells. It is thought that removal of p16 attenuates premature aging by removing senesced cells. However, the role of p16 in CS-induced stress induce premature senescence (SIPS) and senescence-associated secretory phenotype (SASP during the development of COPD/emphysema is not known...
February 15, 2018: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/29445935/readmission-due-to-exacerbation-of-copd-associated-factors
#2
Alicia Cerezo Lajas, Enrique Gutiérrez González, César Llorente Parrado, Luis Puente Maestu, Javier de Miguel-Díez
OBJECTIVES: To compare characteristics of patients readmitted after discharge by chronic obstructive pulmonary disease (COPD) exacerbation with those who were not readmitted and to identify factors associated with readmission risk. PATIENTS AND METHODS: We randomly selected a group of 40 COPD patients with high frequency of readmissions (HFR), who had ≥ 2 admissions by COPD exacerbation within 30 days after the last admission in 2015, and another group of 40 COPD patients with low frequency of readmissions (LFR), with 0-1 admissions in that period...
February 14, 2018: Lung
https://www.readbyqxmd.com/read/29437944/emphysema-and-extrapulmonary-tissue-loss-in-copd-a-multi-organ-loss-of-tissue-phenotype
#3
Bartolome R Celli, Nicholas Locantore, Ruth Tal-Singer, John Riley, Bruce Miller, Jørgen Vestbo, Julie C Yates, Edwin K Silverman, Caroline A Owen, Miguel Divo, Victor Pinto-Plata, Emiel F M Wouters, Rosa Faner, Alvar Agusti
We tested whether emphysema progression accompanies enhanced tissue loss in other body compartments in 1817 patients from the ECLIPSE chronic obstructive pulmonary disease (COPD) cohort.Clinical and selected systemic biomarker measurements were compared in subjects grouped by quantitative tomography scan emphysema quartiles using the percentage of low attenuation area (LAA%). Lowest and highest quartile patients had amino-acid metabolomic profiles. We related LAA% to 3 years decline in lung function (forced expiratory volume in 1 s (FEV 1 )), body mass index (BMI), fat-free mass index (FFMI) and exacerbations, hospitalisations and mortality rates...
February 2018: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/29437007/blood-eosinophils-as-biomarkers-to-drive-treatment-choices-in-asthma-and-copd
#4
Francesco Patalano, Konstantinos Kostikas, Caterina Brindicci
Both asthma and COPD are complex, heterogeneous conditions comprising a wide range of phenotypes, some of which are refractory to currently available treatments. Elucidation of these phenotypes and identification of biomarkers with which to recognize them and guide appropriate treatment remains a priority. This review describes the utility of blood eosinophils as a surrogate biomarker of eosinophilic airway inflammation, a common feature of specific asthma and COPD phenotypes. The role of blood eosinophils in airway disease is described, as is their relevance in reflecting airway eosinophilia...
February 12, 2018: Current Drug Targets
https://www.readbyqxmd.com/read/29422903/autoantibodies-in-chronic-obstructive-pulmonary-disease
#5
REVIEW
Lifang Wen, Susanne Krauss-Etschmann, Frank Petersen, Xinhua Yu
Chronic obstructive pulmonary disease (COPD), the fourth leading cause of death worldwide, is characterized by irreversible airflow limitation based on obstructive bronchiolitis, emphysema, and chronic pulmonary inflammation. Inhaled toxic gases and particles, e.g., cigarette smoke, are major etiologic factors for COPD, while the pathogenesis of the disease is only partially understood. Over the past decade, an increasing body of evidence has been accumulated for a link between COPD and autoimmunity. Studies with clinical samples have demonstrated that autoantibodies are present in sera of COPD patients and some of these antibodies correlate with specific disease phenotypes...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29415880/mtor-pathway-activation-drives-lung-cell-senescence-and-emphysema
#6
Amal Houssaini, Marielle Breau, Kanny Kebe, Shariq Abid, Elisabeth Marcos, Larissa Lipskaia, Dominique Rideau, Aurelien Parpaleix, Jin Huang, Valerie Amsellem, Nora Vienney, Pierre Validire, Bernard Maitre, Aya Attwe, Christina Lukas, David Vindrieux, Jorge Boczkowski, Genevieve Derumeaux, Mario Pende, David Bernard, Silke Meiners, Serge Adnot
Chronic obstructive pulmonary disease (COPD) is a highly prevalent and devastating condition for which no curative treatment is available. Exaggerated lung cell senescence may be a major pathogenic factor. Here, we investigated the potential role for mTOR signaling in lung cell senescence and alterations in COPD using lung tissue and derived cultured cells from patients with COPD and from age- and sex-matched control smokers. Cell senescence in COPD was linked to mTOR activation, and mTOR inhibition by low-dose rapamycin prevented cell senescence and inhibited the proinflammatory senescence-associated secretory phenotype...
February 8, 2018: JCI Insight
https://www.readbyqxmd.com/read/29402641/-emphysema-did-you-say-emphysema
#7
J Benzaquen, J Pradelli, B Padovani, C H Marquette, S Leroy
INTRODUCTION: Chronic obstructive pulmonary disease (COPD) is a common condition that may initially look simple but may conceal other diseases capable of accelerating its natural history or even simulating it. We describe four cases presenting as COPD with emphysema that were reclassified on the basis of certain clinical characteristics and the radiological pattern. CASE REPORTS: A 52 year old never smoking woman presenting with emphysema was eventually diagnosed as having lymphangioleiomyomatosis on the basis of an abdominal CT scan showing kidney angiomyolipomas...
February 2, 2018: Revue des Maladies Respiratoires
https://www.readbyqxmd.com/read/29394082/a-genome-wide-association-study-in-hispanics-latinos-identifies-novel-signals-for-lung-function-the-hispanic-community-health-study-study-of-latinos
#8
Kristin M Burkart, Tamar Sofer, Stephanie J London, Ani Manichaikul, Fernando P Hartwig, Qi Yan, María Soler Artigas, Lydiana Avila, Wei Chen, Sonia Davis Thomas, Alejandro A Diaz, Ian P Hall, Bernardo L Horta, Robert C Kaplan, Cathy C Laurie, Ana M Menezes, Jean V Morrison, Elizabeth C Oelsner, Deepa Rastogi, Stephen S Rich, Manuel Soto-Quiros, Adrienne M Stilp, Martin D Tobin, Louise V Wain, Juan C Celedón, R Graham Barr
RATIONALE: Lung function and chronic obstructive pulmonary disease (COPD) are heritable traits. Genome-wide association studies (GWAS) have identified numerous pulmonary function and COPD loci, primarily in cohorts of European ancestry. OBJECTIVES: Perform a GWAS of COPD-phenotypes in Hispanic/Latino populations to identify loci not previously detected in European populations. METHODS: GWAS of lung function and COPD in Hispanic/Latino participants from a population-based cohort...
February 2, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29386890/phenotyping-copd-exacerbations-using-imaging-and-blood-based-biomarkers
#9
Nawaf M Alotaibi, Virginia Chen, Zsuzsanna Hollander, Cameron J Hague, Darra T Murphy, Jonathon A Leipsic, Mari L DeMarco, J Mark FitzGerald, Bruce M McManus, Raymond T Ng, Don D Sin
Rationale: Acute exacerbations of chronic obstructive pulmonary disease (AECOPD) are caused by a variety of different etiologic agents. Our aim was to phenotype COPD exacerbations using imaging (chest X-ray [CXR] and computed tomography [CT]) and to determine the possible role of the blood tests (C-reactive protein [CRP], the N-terminal prohormone brain natriuretic peptide [NT-proBNP]) as diagnostic biomarkers. Materials and methods: Subjects who were hospitalized with a primary diagnosis of AECOPD and who had had CXRs, CT scans, and blood collection for CRP and NT-proBNP were assessed in this study...
2018: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/29386298/longitudinal-profiling-of-the-lung-microbiome-in-the-aeris-study-demonstrates-repeatability-of-bacterial-and-eosinophilic-copd-exacerbations
#10
David Mayhew, Nathalie Devos, Christophe Lambert, James R Brown, Stuart C Clarke, Viktoriya L Kim, Michal Magid-Slav, Bruce E Miller, Kristoffer K Ostridge, Ruchi Patel, Ganesh Sathe, Daniel F Simola, Karl J Staples, Ruby Sung, Ruth Tal-Singer, Andrew C Tuck, Stephanie Van Horn, Vincent Weynants, Nicholas P Williams, Jeanne-Marie Devaster, Tom M A Wilkinson
BACKGROUND: Alterations in the composition of the lung microbiome associated with adverse clinical outcomes, known as dysbiosis, have been implicated with disease severity and exacerbations in COPD. OBJECTIVE: To characterise longitudinal changes in the lung microbiome in the AERIS study (Acute Exacerbation and Respiratory InfectionS in COPD) and their relationship with associated COPD outcomes. METHODS: We surveyed 584 sputum samples from 101 patients with COPD to analyse the lung microbiome at both stable and exacerbation time points over 1 year using high-throughput sequencing of the 16S ribosomal RNA gene...
January 31, 2018: Thorax
https://www.readbyqxmd.com/read/29371025/home-non-invasive-ventilation-for-copd-how-who-and-when
#11
Patrick B Murphy, Nicholas Hart
Patients with chronic obstructive pulmonary disease (COPD) and chronic respiratory failure have high levels of morbidity and mortality. The clinical efficacy of long term home oxygen therapy has been well documented in this patient group but despite the efficacy of non-invasive ventilation (NIV) during acute decompensated respiratory failure the addition of home NIV has been associated with equivocal results. The physiological efficacy of home NIV to improve gas exchange in chronic stable hypercapnic respiratory failure has been proven in small studies but larger clinical trials failed to translate this into clinical efficacy...
January 19, 2018: Archivos de Bronconeumología
https://www.readbyqxmd.com/read/29361320/medical-care-according-to-risk-level-and-adaptation-to-spanish-copd-guidelines-gesepoc-the-epoconsul-study
#12
Myriam Calle Rubio, Juan Luis Rodríguez Hermosa, Juan José Soler-Cataluña, José Luis López-Campos, Bernardino Alcazar Navarrete, Joan B Soriano, José Miguel Rodríguez Gónzalez-Moro, Manuel E Fuentes Ferrer, Marc Miravitlles
INTRODUCTION: EPOCONSUL is the first national audit to analyze medical care for COPD in pulmonology departments in Spain. The main objective was to perform a retrospective analysis to determine the distribution of GesEPOC 2017 COPD risk levels and to evaluate clinical activity according to the new recommendations. MATERIAL AND METHODS: This is a cross-sectional clinical audit in which consecutive COPD cases were recruited over one year. The study evaluated risk and clinical phenotype according to GesEPOC 2017, and their correlation with the clinical interventions employed...
January 17, 2018: Archivos de Bronconeumología
https://www.readbyqxmd.com/read/29357496/altered-skeletal-muscle-mitochondrial-phenotype-in-copd-disease-versus-disuse
#13
Jayson R Gifford, Joel D Trinity, Oh Sung Kwon, Gwenael Layec, Ryan S Garten, Song Y Park, Ashley D Nelson, Russell S Richardson
Patients with chronic obstructive pulmonary disease (COPD) exhibit an altered skeletal muscle mitochondrial phenotype, which often includes reduced mitochondrial density, altered respiratory function, and elevated oxidative stress. As this phenotype may be explained by the sedentary lifestyle that commonly accompanies this disease, the aim of this study was to determine if such alterations are still evident when patients with COPD are compared to controls matched for objectively-measured, physical activity (PA, accelerometery)...
December 28, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29357265/characterisation-of-the-frequent-exacerbator-phenotype-in-bronchiectasis
#14
James D Chalmers, Stefano Aliberti, Anna Filonenko, Michal Shteinberg, Pieter C Goeminne, Adam T Hill, Thomas C Fardon, Dusanka Obradovic, Christoph Gerlinger, Giovanni Sotgiu, Elisabeth Operschall, Robert M Rutherford, Katerina Dimakou, Eva Polverino, Anthony De Soyza, Melissa J McDonnell
RATIONALE: Exacerbations are key events in the natural history of bronchiectasis, but clinical predictors and outcomes of frequently exacerbating patients are not well described. OBJECTIVES: To establish if there is a "frequent exacerbator phenotype" in bronchiectasis and the impact of exacerbations on long-term clinical outcomes. METHODS: We studied bronchiectasis patients enrolled from 10 clinical centres in Europe and Israel, with up to 5-years follow-up...
January 22, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29351436/therapeutic-attenuation-of-the-epithelial-sodium-channel-with-a-splunc1-derived-peptide-in-airway-diseases
#15
James F Collawn, Rafal Bartoszewski, Ahmad Lazrak, Sadis Matalon
The airway surface liquid (ASL) coats the lining of the airways and allows for efficient cilial movement and therefore effective mucociliary transport. Cell surface channels regulate the hydration status of the ASL and the two critical channels in the process are the cystic fibrosis transmembrane conductance regulator (CFTR) and the amiloride-sensitive epithelial sodium channel (ENaC). In cystic fibrosis (CF) and chronic obstructive pulmonary disease (COPD) there is loss of CFTR function or compromised CFTR function in chronic bronchitis, respectively...
January 4, 2018: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/29337379/interleukin-17a-and-vascular-remodeling-in-severe-asthma-lack-of-evidence-for-a-direct-role
#16
Alice Panariti, Carolyn J Baglole, Veronica Sanchez, David H Eidelman, Sabah Hussain, Ron Olivenstein, James G Martin, Qutayba Hamid
BACKGROUND: Bronchial vascular remodeling may contribute to the severity of airway narrowing through mucosal congestion. Interleukin (IL)-17A is associated with the most severe asthmatic phenotype but whether it might contribute to vascular remodeling is uncertain. OBJECTIVE: To assess vascular remodeling in severe asthma and whether IL-17A directly or indirectly may cause endothelial cell activation and angiogenesis. METHODS: Bronchial vascularization was quantified in asthmatic subjects, COPD and healthy subjects together with the number of IL-17A+ cells as well as the concentration of angiogenic factors in the sputum...
January 16, 2018: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29329680/correlation-of-severity-of-chronic-obstructive-pulmonary-disease-with-potential-biomarkers
#17
Seema Singh, S K Verma, Santosh Kumar, M K Ahmad, Anuradha Nischal, S K Singh, R K Dixit
BACKGROUND: Chronic obstructive pulmonary disease (COPD) is a non-specific inflammation, which involves the airways, lung parenchyma and pulmonary vessels. The inflammation causes the activation of inflammatory cells and the release of various inflammatory mediators such as interleukin-1 beta, interleukin-6 and tumor necrosis factor alpha (TNF-a). The present study was designed to assess the serum cytokines [Interleukin-1β (IL-1β), Interleukin-6 (IL-6), Tumor necrosis factor-α (TNF-α)] levels in chronic obstructive pulmonary disease (COPD) patients and they were correlated with severity of disease by spirometric measurements...
January 9, 2018: Immunology Letters
https://www.readbyqxmd.com/read/29329304/a-novel-method-to-test-associations-between-a-weighted-combination-of-phenotypes-and-genetic-variants
#18
Huanhuan Zhu, Shuanglin Zhang, Qiuying Sha
Many complex diseases like diabetes, hypertension, metabolic syndrome, et cetera, are measured by multiple correlated phenotypes. However, most genome-wide association studies (GWAS) focus on one phenotype of interest or study multiple phenotypes separately for identifying genetic variants associated with complex diseases. Analyzing one phenotype or the related phenotypes separately may lose power due to ignoring the information obtained by combining phenotypes, such as the correlation between phenotypes. In order to increase statistical power to detect genetic variants associated with complex diseases, we develop a novel method to test a weighted combination of multiple phenotypes (WCmulP)...
2018: PloS One
https://www.readbyqxmd.com/read/29326334/clinical-and-inflammatory-phenotyping-by-breathomics-in-chronic-airway-diseases-irrespective-of-the-diagnostic-label
#19
Rianne de Vries, Yennece W F Dagelet, Pien Spoor, Erik Snoey, Patrick M C Jak, Paul Brinkman, Erica Dijkers, Simon K Bootsma, Fred Elskamp, Frans H C de Jongh, Eric G Haarman, Johannes C C M In 't Veen, Anke-Hilse Maitland-van der Zee, Peter J Sterk
Asthma and chronic obstructive pulmonary disease (COPD) are complex and overlapping diseases that include inflammatory phenotypes. Novel anti-eosinophilic/anti-neutrophilic strategies demand rapid inflammatory phenotyping, which might be accessible from exhaled breath.Our objective was to capture clinical/inflammatory phenotypes in patients with chronic airway disease using an electronic nose (eNose) in a training and validation set.This was a multicentre cross-sectional study in which exhaled breath from asthma and COPD patients (n=435; training n=321 and validation n=114) was analysed using eNose technology...
January 2018: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/29322375/predictors-of-short-term-lama-ineffectiveness-in-treatment-na%C3%A3-ve-patients-with-moderate-to-severe-copd
#20
Vladimir Fijačko, Marina Labor, Mirjana Fijačko, Sanda Škrinjarić-Cincar, Slavica Labor, Iva Dumbović Dubravčić, Tatjana Bačun, Aleksandar Včev, Sanja Popović-Grle, Davor Plavec
BACKGROUND: No specific (only subgroup) recommendations for the use of long-acting muscarinic antagonists in chronic obstructive pulmonary disease (COPD) exist. The aim of this exploratory hypothesis generating study was to assess whether different phenotypic/endotypic characteristics could be determinants of the short-term ineffectiveness of the initial tiotropium bromide monotherapy in treatment naïve moderate to severe COPD patients. METHODS: A total of 51 consecutively recruited COPD patients were followed for 3 months after the initial evaluation and prescribed initial treatment (tiotropium)...
January 10, 2018: Wiener Klinische Wochenschrift
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