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Pathogenesis of COPD

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https://www.readbyqxmd.com/read/29775687/effects-of-bronchodilation-on-biomarkers-of-peripheral-airway-inflammation-in-copd
#1
Pierachille Santus, Dejan Radovanovic, Susanna Mascetti, Alessia Pauletti, Vincenzo Valenti, Marco Mantero, Alberto Papi, Marco Contoli
Peripheral airway inflammation and dysfunction are key elements in the pathogenesis of COPD. The exhaled alveolar fraction of nitric oxide (CANO) is an indirect biomarker of lung peripheral inflammation. We tested whether inhaled long-acting bronchodilators (LABA) can affect CANO and we evaluated correlations with lung mechanics in patients with COPD. Two-centre, randomised, double blind, crossover study including COPD patients with moderate-to-severe airflow obstruction. Following a pharmacological washout, multi-flow exhaled fraction of NO (FENO), plethysmography, lung diffusion (DLCO), single breath nitrogen washout test and dyspnoea were measured in a crossover manner at baseline and 30, 60 and 180 minutes following administration of salmeterol (Sal) or formoterol fumarate (FF)...
May 15, 2018: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29765063/long-non-coding-rna-expression-patterns-in-lung-tissues-of-chronic-cigarette-smoke-induced-copd-mouse-model
#2
Haiyun Zhang, Dejun Sun, Defu Li, Zeguang Zheng, Jingyi Xu, Xue Liang, Chenting Zhang, Sheng Wang, Jian Wang, Wenju Lu
Long non-coding RNAs (lncRNAs) have critical regulatory roles in protein-coding gene expression. Aberrant expression profiles of lncRNAs have been observed in various human diseases. In this study, we investigated transcriptome profiles in lung tissues of chronic cigarette smoke (CS)-induced COPD mouse model. We found that 109 lncRNAs and 260 mRNAs were significantly differential expressed in lungs of chronic CS-induced COPD mouse model compared with control animals. GO and KEGG analyses indicated that differentially expressed lncRNAs associated protein-coding genes were mainly involved in protein processing of endoplasmic reticulum pathway, and taurine and hypotaurine metabolism pathway...
May 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29760213/changes-in-iga-protease-expression-are-conferred-by-changes-in-genomes-during-persistent-infection-by-nontypeable-haemophilus-influenzae-in-chronic-obstructive-pulmonary-disease
#3
Mary C Gallo, Charmaine Kirkham, Samantha Eng, Remon S Bebawee, Yong Kong, Melinda M Pettigrew, Hervé Tettelin, Timothy F Murphy
Nontypeable Haemophilus influenzae (NTHi) is an exclusively human pathobiont that plays a critical role in the course and pathogenesis of chronic obstructive pulmonary disease (COPD). NTHi causes acute exacerbations of COPD and also causes persistent infection of the lower airways. NTHi expresses four IgA protease variants (A1, A2, B1, and B2) that play different roles in virulence. Expression of IgA proteases varies among NTHi strains, but little is known about the frequency and mechanisms by which NTHi modulates IgA protease expression during infection in COPD...
May 14, 2018: Infection and Immunity
https://www.readbyqxmd.com/read/29750581/cftr-dysfunction-in-cystic-fibrosis-and-chronic-obstructive-pulmonary-disease
#4
Elena Fernandez Fernandez, Chiara de Santi, Virginia De Rose, Catherine M Greene
Obstructive lung diseases such as cystic fibrosis (CF) and chronic obstructive pulmonary disease (COPD) are causes of high morbidity and mortality worldwide. CF is a multiorgan genetic disease caused by mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene and is characterized by progressive chronic obstructive lung disease. Most cases of COPD are a result of noxious particles, mainly cigarette smoke but also other environmental pollutants. Areas covered: Although the pathogenesis and pathophysiology of CF and COPD differ, they do share key phenotypic features and because of these similarities there is great interest in exploring common mechanisms and/or factors affected by CFTR mutations and environmental insults involved in COPD...
May 11, 2018: Expert Review of Respiratory Medicine
https://www.readbyqxmd.com/read/29750543/a-disintegrin-and-a-metalloproteinase-domain-8-adam8-a-novel-protective-proteinase-in-copd
#5
Francesca Polverino, Joselyn Rojas-Quintero, Xiaoyun Wang, Hans Petersen, Li Zhang, Xiaoyan Gai, Andrew Higham, Duo Zhang, Kushagra Gupta, Amit Rout, Ilyas Yambayev, Victor Pinto-Plata, Lynette M Sholl, Danen Cunoosamy, Bartolomé R Celli, James Goldring, Dave Singh, Yohannes Tesfaigzi, Jadwiga Wedzicha, Henric Olsson, Caroline A Owen
RATIONALE: A disintegrin and metalloproteinase-8 (ADAM8) is expressed by leukocytes and epithelial cells in health, but its contribution to the pathogenesis of COPD is unknown. OBJECTIVES: ADAM8 levels were measured in lung, sputum, plasma, and/or bronchoalveolar lavage fluid (BALF) samples from COPD patients, smokers, and non-smokers, and wild-type (WT) mice exposed to cigarette smoke (CS) versus air. COPD-like lung pathologies were compared in CS-exposed WT versus Adam8-/- mice...
May 11, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29731913/function-of-macrophage-scavenger-receptor-1-gene-polymorphisms-in-chronic-obstructive-pulmonary-disease-with-and-without-lung-cancer-in-china
#6
Liang Xie, Wei Chen, Ran Dong, Bin He, Kaishun Zhao, Li Zhang, Min Zhou, Ping He
The present study assessed the association between the variants of macrophage scavenger receptor (MSR)1 and chronic obstructive pulmonary disease (COPD), with or without lung cancer in China. COPD and lung cancer were previously regarded as two separate diseases. However, it has since been reported that there are close associations between COPD and lung cancer. Lung cancer may be an outcome of COPD. COPD may also coexist with lung cancer, and patients with COPD with lung cancer tend to have increased mortality...
May 2018: Oncology Letters
https://www.readbyqxmd.com/read/29731621/physical-inactivity-is-associated-with-decreased-growth-differentiation-factor-11-in-chronic-obstructive-pulmonary-disease
#7
Rie Tanaka, Hisatoshi Sugiura, Mitsuhiro Yamada, Tomohiro Ichikawa, Akira Koarai, Naoya Fujino, Satoru Yanagisawa, Katsuhiro Onodera, Tadahisa Numakura, Kei Sato, Yorihiko Kyogoku, Hirohito Sano, Shun Yamanaka, Tatsuma Okazaki, Tsutomu Tamada, Motohiko Miura, Tsuneyuki Takahashi, Masakazu Ichinose
Background: Growth differentiation factor 11 (GDF11) is reported to possess anti-aging and rejuvenating effects, including muscle regeneration and to be highly expressed in skeletal muscle. Recently, we demonstrated that the levels of plasma GDF11 were decreased in COPD. However, the effect of decreased circulating GDF11 in the pathophysiology of COPD remains unknown. The aim of this study is to investigate the association between the plasma GDF11 levels and various clinical parameters in patients with COPD...
2018: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/29725457/function-of-pm2-5-in-the-pathogenesis-of-lung-cancer-and-chronic-airway-inflammatory-diseases
#8
REVIEW
Ruyi Li, Rui Zhou, Jiange Zhang
Previous research has identified that air pollution is associated with various respiratory diseases, but few studies have investigated the function served by particulate matter 2.5 (PM2.5) in these diseases. PM2.5 is known to cause epigenetic and microenvironmental alterations in lung cancer, including tumor-associated signaling pathway activation mediated by microRNA dysregulation, DNA methylation, and increased levels of cytokines and inflammatory cells. Autophagy and apoptosis of tumor cells may also be detected in lung cancer associated with PM2...
May 2018: Oncology Letters
https://www.readbyqxmd.com/read/29725272/the-role-of-regulatory-t-cell-in-nontypeable-haemophilus-influenzae-induced-acute-exacerbation-of-chronic-obstructive-pulmonary-disease
#9
Xuewa Guan, Yanjiao Lu, Guoqiang Wang, Peter Gibson, Fang Chen, Keyong Fang, Ziyan Wang, Zhiqiang Pang, Yingqiao Guo, Junying Lu, Yuze Yuan, Nan Ran, Fang Wang
Chronic obstructive pulmonary disease (COPD) is associated with irreversible persistent airflow limitation and enhanced inflammation. The episodes of acute exacerbation (AECOPD) largely depend on the colonized pathogens such as nontypeable Haemophilus influenzae (NTHi), one of the most commonly isolated bacteria. Regulatory T cells (Tregs) are critical in controlling inflammatory immune responses and maintaining tolerance; however, their role in AECOPD is poorly understood. In this study, we hypothesized a regulatory role of Tregs, as NTHi participated in the progress of COPD...
2018: Mediators of Inflammation
https://www.readbyqxmd.com/read/29725270/long-noncoding-rnas-and-mrna-regulation-in-peripheral-blood-mononuclear-cells-of-patients-with-chronic-obstructive-pulmonary-disease
#10
Xiaoyan Qu, Xiaomin Dang, Weijia Wang, Ying Li, Dan Xu, Dong Shang, Ying Chang
Background: Inflammation plays a pivotal role in the pathogenesis of chronic obstructive pulmonary disease (COPD). We evaluated the lncRNA and mRNA expression profile of peripheral blood mononuclear cells (PBMCs) from healthy nonsmokers, smokers without airflow limitation, and COPD patients. Methods: lncRNA and mRNA profiling of PBMCs from 17 smokers and 14 COPD subjects was detected by high-throughput microarray. The expression of dysregulated lncRNAs was validated by qPCR...
2018: Mediators of Inflammation
https://www.readbyqxmd.com/read/29722565/mmp-12-activates-protease-activated-receptor-par-1-upregulates-placenta-growth-factor-and-leads-to-pulmonary-emphysema
#11
Hsin-Han Hou, Hao-Chien Wang, Shih-Lung Cheng, Yen-Fu Chen, Kai-Zen Lu, Chong-Jen Yu
Due to the expansion of aging and smoking populations, chronic pulmonary obstructive disease (COPD) is predicted to be the third leading cause of death worldwide in 2030. It is therefore pertinent to develop effective therapy to improve management for COPD. Cigarette smoke-mediated protease-antiprotease imbalance is a major pathogenic mechanism for COPD and results in massive pulmonary infiltration of neutrophils and macrophages, releasing excessive neutrophil elastase (NE) and matrix metalloproteinases (MMPs)...
May 3, 2018: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/29696082/oxidant-status-iron-homeostasis-and-carotenoid-levels-of-copd-patients-with-advanced-disease-and-ltot
#12
M Kentson, P Leanderson, P Jacobson, H L Persson
Background : The pathogenesis of chronic obstructive pulmonary disease (COPD) is associated with oxidative stress. Both iron (Fe) and oxygen are involved in the chemical reactions that lead to increased formation of reactive oxygen species. Oxidative reactions are prevented by antioxidants such as carotenoids. Objective : To study the differences in Fe status, carotenoid levels, healthy eating habits, and markers of inflammation and oxidative damage on proteins in subjects with severe COPD ± long-term oxygen therapy (LTOT) and lung-healthy control subjects...
2018: European Clinical Respiratory Journal
https://www.readbyqxmd.com/read/29692824/chronic-obstructive-pulmonary-disease-micrornas-and-exosomes-as-new-diagnostic-and-therapeutic-biomarkers
#13
REVIEW
Jafar Salimian, Hamed Mirzaei, Abdullah Moridikia, Asghar Beigi Harchegani, Amirhossein Sahebkar, Hossein Salehi
Chronic obstructive pulmonary disease (COPD) is known as a progressive lung disease and the fourth leading cause of death worldwide. Despite valuable efforts, there is still no accurate diagnostic and prognostic tool for COPD. Hence, it seems that finding new biomarkers could contribute to provide better therapeutic platforms for COPD patients. Among various biomarkers, microRNAs (miRNAs) have emerged as new biomarkers for the prognosis and diagnosis of patients with COPD. It has been shown that deregulation of miRNAs targeting a variety of cellular and molecular pathways such as Notch, Wnt, hypoxia-inducible factor-1α, transforming growth factor, Kras, and Smad could be involved in COPD pathogenesis...
2018: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/29683730/biologic-drugs-a-new-target-therapy-in-copd
#14
Ahmed Yousuf, Christopher E Brightling
Chronic obstructive pulmonary disease (COPD) is a heterogeneous disease associated with significant morbidity and mortality. Current diagnostic criteria based on the presence of fixed airflow obstruction and symptoms do not integrate the complex pathological changes occurring within the lung and they do not define different airway inflammatory patterns. The current management of COPD is based on 'one size fits all' approach and does not take the importance of heterogeneity in COPD population into account. The available treatments aim to alleviate symptoms and reduce exacerbation frequency but do not alter the course of the disease...
April 23, 2018: COPD
https://www.readbyqxmd.com/read/29676596/lung-dendritic-cells-drive-nk-cytotoxicity-in-chronic-obstructive-pulmonary-disease-via-il-15r%C3%AE
#15
Donna K Finch, Valerie R Stolberg, John Ferguson, Henrih Alikaj, Mohamed R Kady, Bradley W Richmond, Vasiliy V Polosukhin, Timothy S Blackwell, Lisa McCloskey, Jeffrey L Curtis, Christine M Freeman
RATIONALE: Lung natural killer (NK) cells kill a greater percentage of autologous lung parenchymal cells in COPD than in non-obstructed smokers. To become cytotoxic, NKs require priming, typically by dendritic cells (DC), but whether priming occurs in the lungs in COPD is unknown. METHODS: We used lung tissue and in some cases peripheral blood from patients undergoing clinically-indicated resections to determine in vitro killing of CD326+ lung epithelial cells by isolated lung CD56+ NKs...
April 20, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29674392/cholesterol-metabolism-promotes-b-cell-positioning-during-immune-pathogenesis-of-chronic-obstructive-pulmonary-disease
#16
Jie Jia, Thomas M Conlon, Rim Sj Sarker, Demet Taşdemir, Natalia F Smirnova, Barkha Srivastava, Stijn E Verleden, Gizem Güneş, Xiao Wu, Cornelia Prehn, Jiaqi Gao, Katharina Heinzelmann, Jutta Lintelmann, Martin Irmler, Stefan Pfeiffer, Michael Schloter, Ralf Zimmermann, Martin Hrabé de Angelis, Johannes Beckers, Jerzy Adamski, Hasan Bayram, Oliver Eickelberg, Ali Önder Yildirim
The development of chronic obstructive pulmonary disease (COPD) pathogenesis remains unclear, but emerging evidence supports a crucial role for inducible bronchus-associated lymphoid tissue (iBALT) in disease progression. Mechanisms underlying iBALT generation, particularly during chronic CS exposure, remain to be defined. Oxysterol metabolism of cholesterol is crucial to immune cell localization in secondary lymphoid tissue. Here, we demonstrate that oxysterols also critically regulate iBALT generation and the immune pathogenesis of COPD In both COPD patients and cigarette smoke (CS)-exposed mice, we identified significantly upregulated CH25H and CYP7B1 expression in airway epithelial cells, regulating CS-induced B-cell migration and iBALT formation...
April 19, 2018: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/29657714/non-typeable-haemophilus-influenzae-detection-in-the-lower-airways-of-patients-with-lung-cancer-and-chronic-obstructive-pulmonary-disease
#17
Krishna B Sriram, Amanda J Cox, Pathmanathan Sivakumaran, Maninder Singh, Annabelle M Watts, Nicholas P West, Allan W Cripps
Background: Chronic airway inflammation and hypersensitivity to bacterial infection may contribute to lung cancer pathogenesis. Previous studies have demonstrated that nontypeable Haemophilus influenzae (NTHi) is the most common colonizing bacteria in the lower airways of patients with COPD. The objective of this study was to determine the presence of NTHi and immunoglobulin concentrations in patients with lung cancer, COPD and controls. Methods: Serum and bronchial wash samples were collected from patients undergoing diagnostic bronchoscopy...
2018: Multidisciplinary Respiratory Medicine
https://www.readbyqxmd.com/read/29649811/transcription-elongation-factor-p-tefb-is-involved-in-il-17f-signaling-in-airway-smooth-muscle-cells
#18
Masayuki Nakajima, Mio Kawaguchi, Masashi Matsuyama, Kyoko Ota, Junichi Fujita, Satoshi Matsukura, Shau-Ku Huang, Yuko Morishima, Yukio Ishii, Hiroaki Satoh, Tohru Sakamoto, Nobuyuki Hizawa
BACKGROUND: IL-17F is involved in the pathogenesis of several inflammatory diseases, including asthma and COPD. However, the effects of steroids on the function of IL-17F signaling mechanisms are largely unknown. One of the transcription elongation factors, positive transcription elongation factor b (P-TEFb) composed of cyclin T1 and cyclin-dependent kinase 9 (CDK9), is known as a novel checkpoint regulator of gene expression via bromodomain-containing protein 4 (Brd4). METHODS: Human airway smooth muscle cells were stimulated with IL-17F and the expression of IL-8 was evaluated by real-time PCR and ELISA...
April 12, 2018: International Archives of Allergy and Immunology
https://www.readbyqxmd.com/read/29627816/effects-of-dietary-antioxidant-vitamins-on-lung-functions-according-to-gender-and-smoking-status-in-korea-a-population-based-cross-sectional-study
#19
Ji Young Hong, Chang Youl Lee, Myung Goo Lee, Young Sam Kim
OBJECTIVE: Cigarette smoke-induced oxidative stress plays an important role in the pathogenesis of chronic obstructive pulmonary disease (COPD). Dietary antioxidants are thought to prevent smoke-induced oxidative damage. The aim of this study was to investigate associations between lung function and the consumption of antioxidant vitamins in Korean adults. METHODS: In total, 21 148 participants from the Korean National Health and Nutrition Examination Survey (2007-2014) were divided into four groups based on smoking history and gender...
April 7, 2018: BMJ Open
https://www.readbyqxmd.com/read/29620199/correlation-between-autophagy-levels-in-peripheral-blood-mononuclear-cells-and-clinical-parameters-in-patients-with-chronic-obstructive-pulmonary-disease
#20
Yanjun Wu, Bo Xu, Xin He, Bo Wu, Yunxiao Li, Ganggang Yu, Chunting Tan, Haoyan Wang
Autophagy serves a role in the pathogenesis of chronic inflammatory diseases. The aim of the present study was to compare the autophagy levels in the peripheral blood mononuclear cells (PBMCs) of patients with chronic obstructive pulmonary disease (COPD) and healthy individuals and to assess the association between autophagy and the clinical parameters of COPD. Samples of peripheral blood from 20 patients with stable COPD and 20 healthy controls were collected. PBMCs were harvested using Ficoll density gradient centrifugation...
March 29, 2018: Molecular Medicine Reports
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