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Pathogenesis of COPD

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https://www.readbyqxmd.com/read/27909766/association-between-tlr2-tlr4-gene-polymorphisms-and-copd-phenotype-in-a%C3%A2-greek-cohort
#1
A Apostolou, T Kerenidi, A Michopoulos, K I Gourgoulianis, M Noutsias, A E Germenis, M Speletas
BACKGROUND: Considering that the innate immune system plays a pivotal role in the pathogenesis of chronic obstructive pulmonary disease (COPD), we hypothesized that functional single-nucleotide polymorphisms (SNPs) of innate immune genes affect the disease phenotype and prognosis. AIM: To elucidate the contribution of common functional TLR2 and TLR4 SNPs and genotypic deficiency of the mannose-binding lectin (MBL) protein, both as single parameters and in combination, in Greek COPD patients...
December 1, 2016: Herz
https://www.readbyqxmd.com/read/27904558/relationships-of-mmp-9-and-timp-1-proteins-with-chronic-obstructive-pulmonary-disease-risk-a-systematic-review-and-meta-analysis
#2
REVIEW
Yangxue Li, Yang Lu, Zhuo Zhao, Junnan Wang, Jianxin Li, Weiming Wang, Shumei Li, Lei Song
BACKGROUND: We performed this meta-analysis in order to collect all the relevant studies to clarify the correlations of matrix metalloproteinase-9 (MMP-9) and tissue inhibitor of metalloproteinase-1 (TIMP-1) with chronic obstructive pulmonary disease (COPD). MATERIALS AND METHODS: After a literature search in electronic databases, pertinent case-control studies investigating the correlations of MMP-9 and TIMP-1 protein expressions within a COPD setting were enrolled based on our strict inclusion and exclusion criteria...
2016: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/27902340/viral-bacterial-interactions-in-the-respiratory-tract
#3
Carla Bellinghausen, Gernot Gu Rohde, Paul Hm Savelkoul, Emiel Fm Wouters, Frank Rm Stassen
In the respiratory tract, viruses and bacteria can interact on multiple levels. It is well known that respiratory viruses, particularly influenza viruses, increase the susceptibility to secondary bacterial infections. Numerous mechanisms, including compromised physical and immunological barriers, and changes in the microenvironment have hereby been shown to contribute to the development of secondary bacterial infections. In contrast, our understanding of how bacteria shape a response to subsequent viral infection is still limited...
October 18, 2016: Journal of General Virology
https://www.readbyqxmd.com/read/27888348/pathogenesis-of-copd-and-asthma
#4
Clive Page, Blaze O'Shaughnessy, Peter Barnes
Asthma and COPD remain two diseases of the respiratory tract with unmet medical needs. This review considers the current state of play with respect to what is known about the underlying pathogenesis of these two chronic inflammatory diseases of the lung. The review highlights why they are different conditions requiring different approaches to treatment and provides a backdrop for the subsequent chapters in this volume discussing recent advances in the pharmacology and treatment of asthma and COPD.
November 26, 2016: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/27886850/cellular-senescence-and-autophagy-in-the-pathogenesis-of-chronic-obstructive-pulmonary-disease-copd-and-idiopathic-pulmonary-fibrosis-ipf
#5
REVIEW
Kazuyoshi Kuwano, Jun Araya, Hiromichi Hara, Shunsuke Minagawa, Naoki Takasaka, Saburo Ito, Kenji Kobayashi, Katsutoshi Nakayama
Aging is associated with impairments in homeostasis. Although aging and senescence are not equivalent, the number of senescent cells increases with aging. Cellular senescence plays important roles in tissue repair or remodeling, as well as embryonic development. Autophagy is a process of lysosomal self-degradation that maintains a homeostatic balance between the synthesis, degradation, and recycling of cellular proteins. Autophagy diminishes with aging; additionally, accelerated aging can be attributed to reduced autophagy...
November 2016: Respiratory Investigation
https://www.readbyqxmd.com/read/27886849/prevalence-and-burden-of-comorbidities-in-chronic-obstructive-pulmonary-disease
#6
REVIEW
Alexandru Corlateanu, Serghei Covantev, Alexander G Mathioudakis, Victor Botnaru, Nikolaos Siafakas
The classical definition of Chronic Obstructive Pulmonary Disease (COPD) as a lung condition characterized by irreversible airway obstruction is outdated. The systemic involvement in patients with COPD, as well as the interactions between COPD and its comorbidities, justify the description of chronic systemic inflammatory syndrome. The pathogenesis of COPD is closely linked with aging, as well as with cardiovascular, endocrine, musculoskeletal, renal, and gastrointestinal pathologies, decreasing the quality of life of patients with COPD and, furthermore, complicating the management of the disease...
November 2016: Respiratory Investigation
https://www.readbyqxmd.com/read/27884766/mechanisms-of-vascular-dysfunction-in-copd-and-effects-of-a-novel-soluble-epoxide-hydrolase-inhibitor-in-smokers
#7
Lucy Yang, Joseph Cheriyan, David D Gutterman, Ruth J Mayer, Zsuzsanna Ament, Jules L Griffin, Aili L Lazaar, David E Newby, Ruth Tal-Singer, Ian B Wilkinson
BACKGROUND: Smoking and chronic obstructive pulmonary disease (COPD) are risk factors for cardiovascular disease, and the pathogenesis may involve endothelial dysfunction. We tested the hypothesis that endothelium-derived epoxyeicosatrienoic acid (EET)-mediated endothelial function is impaired in patients with COPD, and a novel sEH inhibitor GSK2256294 attenuates EET-mediated endothelial dysfunction in human resistance vessels both in vitro and in vivo. METHODS: Endogenous and stimulated endothelial release of EETs was assessed in 12 COPD patients, 11 overweight smokers, and 2 matched control groups, using forearm plethysmography with intra-arterial infusions of fluconazole, bradykinin, and the combination...
November 21, 2016: Chest
https://www.readbyqxmd.com/read/27842552/circulating-biomarkers-of-oxidative-stress-in-chronic-obstructive-pulmonary-disease-a-systematic-review
#8
REVIEW
Elisabetta Zinellu, Angelo Zinellu, Alessandro Giuseppe Fois, Ciriaco Carru, Pietro Pirina
Chronic obstructive pulmonary disease (COPD) is a progressive condition characterized by airflow limitation associated with an abnormal inflammatory response of the lungs to noxious particles and gases, caused primarily by cigarette smoking. Increased oxidative burden plays an important role in the pathogenesis of COPD. There is a delicate balance between the toxicity of oxidants and the protective function of the intracellular and extracellular antioxidant defense systems, which is critically important for the maintenance of normal pulmonary functions...
November 14, 2016: Respiratory Research
https://www.readbyqxmd.com/read/27835930/master-autophagy-regulator-transcription-factor-eb-tfeb-regulates-cigarette-smoke-induced-autophagy-impairment-and-copd-emphysema-pathogenesis
#9
Manish Bodas, Neel Patel, David Silverberg, Kyla Walworth, Neeraj Vij
AIMS: Recent studies have shown that cigarette smoke (CS)-induced oxidative-stress impairs autophagy resulting in aggresome-formation that correlates with the severity of COPD-emphysema. Although, specific step in autophagy-pathway that is impaired is unknown. Hence, in this study we aimed to evaluate the role of master autophagy-regulator and transcription factor-EB (TFEB) in CS-induced COPD-emphysema pathogenesis. RESULTS: We first observed that TFEB-accumulates in the peri-nuclear spaces of the COPD lung tissues of tobacco-smokers and severe-emphysema subjects...
November 11, 2016: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/27826243/genetic-ablation-of-cxcr2-protects-against-cigarette-smoke-induced-lung-inflammation-and-injury
#10
Chad A Lerner, Wei Lei, Isaac K Sundar, Irfan Rahman
Antagonism of CXCR2 receptors, predominately located on neutrophils and critical for their immunomodulatory activity, is an attractive pharmacological therapeutic approach aimed at reducing the potentially damaging effects of heightened neutrophil influx into the lung. The role CXCR2 in lung inflammation in response to cigarette smoke (CS) inhalation using the mutant mouse approach is not known. We hypothesized that genetic ablation of CXCR2 would protect mice against CS-induced inflammation and DNA damage response...
2016: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/27814579/the-emergence-of-aspergillus-species-in-chronic-respiratory-disease
#11
Anthony Ca Yii, Mariko S Koh, Therese S Lapperre, Gan L Tan, Sanjay H Chotirmall
Chronic lung disease is recognized as an important risk factor for developing pulmonary aspergillosis. The development of specific aspergillus-associated syndromes depends on host immunity and underlying lung disease. In the setting of asthma, hypersensitivity to Aspergillus can lead to allergic bronchopulmonary aspergillosis (ABPA) or severe asthma with fungal sensitization (SAFS). Chronic use of systemic or inhaled corticosteroids coupled with recurrent antibiotic use for exacerbations prevalent in chronic obstructive pulmonary disease (COPD) predisposes to chronic pulmonary aspergillosis (CPA)...
January 1, 2017: Frontiers in Bioscience (Scholar Edition)
https://www.readbyqxmd.com/read/27812370/post-gwas-prioritization-through-data-integration-provides-novel-insights-on-chronic-obstructive-pulmonary-disease
#12
Qiongshi Lu, Chentian Jin, Jiehuan Sun, Russell Bowler, Katerina Kechris, Naftali Kaminski, Hongyu Zhao
Rich collections of genomic and epigenomic annotations, availabilities of large population cohorts for genome-wide association studies (GWAS), and advancements in data integration techniques provide the unprecedented opportunity to accelerate discoveries in complex disease studies through integrative analyses. In this paper, we apply a variety of approaches to integrate GWAS summary statistics of chronic obstructive pulmonary disease (COPD) with functional annotations to illustrate how data integration could help researchers understand complex human diseases...
2016: Statistics in Biosciences
https://www.readbyqxmd.com/read/27801806/extracellular-vesicles-in-chronic-obstructive-pulmonary-disease
#13
REVIEW
Tsukasa Kadota, Yu Fujita, Yusuke Yoshioka, Jun Araya, Kazuyoshi Kuwano, Takahiro Ochiya
Chronic obstructive pulmonary disease (COPD) is characterized by the progression of irreversible airflow limitation and is a leading cause of morbidity and mortality worldwide. Although several crucial mechanisms of COPD pathogenesis have been studied, the precise mechanism remains unknown. Extracellular vesicles (EVs), including exosomes, microvesicles, and apoptotic bodies, are released from almost all cell types and are recognized as novel cell-cell communication tools. They have been shown to carry and transfer a wide variety of molecules, such as microRNAs, messenger RNAs, and proteins, which are involved in physiological functions and the pathology of various diseases...
October 27, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27800118/manifesto-on-small-airway-involvement-and-management-in-asthma-and-chronic-obstructive-pulmonary-disease-an-interasma-global-asthma-association-gaa-and-world-allergy-organization-wao-document-endorsed-by-allergic-rhinitis-and-its-impact-on-asthma-aria-and-global
#14
F Braido, N Scichilone, F Lavorini, O S Usmani, L Dubuske, L P Boulet, R Mosges, C Nunes, M Sanchez-Borges, I J Ansotegui, M Ebisawa, F Levi-Schaffer, L J Rosenwasser, J Bousquet, T Zuberbier, G Walter Canonica, A Cruz, A Yanez, A Yorgancioglu, D Deleanu, G Rodrigo, J Berstein, K Ohta, P Vichyanond, R Pawankar, S N Gonzalez-Diaz, S Nakajima, T Slavyanskaya, A Fink-Wagner, C Baez Loyola, D Ryan, G Passalacqua, J Celedon, J C Ivancevich, K Dobashi, M Zernotti, M Akdis, S Benjaponpitak, S Bonini, W Burks, L Caraballo, Z Awad El-Sayed, S Fineman, P Greenberger, E Hossny, J A Ortega-Martell, H Saito, M Tang, L Zhang
Evidence that enables us to identify, assess, and access the small airways in asthma and chronic obstructive pulmonary disease (COPD) has led INTERASMA (Global Asthma Association) and WAO to take a position on the role of the small airways in these diseases. Starting from an extensive literature review, both organizations developed, discussed, and approved the manifesto, which was subsequently approved and endorsed by the chairs of ARIA and GA(2)LEN. The manifesto describes the evidence gathered to date and defines and proposes issues on small airway involvement and management in asthma and COPD with the aim of challenging assumptions, fostering commitment, and bringing about change...
2016: World Allergy Organization Journal
https://www.readbyqxmd.com/read/27794529/bronchiectasis-and-aspergillus-how-are-they-linked
#15
Anthony De Soyza, Stefano Aliberti
Bronchiectasis is a chronic airway infection syndrome, distinct from cystic fibrosis that is rising in prevalence and is associated with significant morbidity and mortality. It can be caused by many etiologies including post-infectious effects or be seen in common lung diseases such as chronic obstructive pulmonary disease (COPD) or severe asthma. Bronchiectasis is associated with many Aspergillus-associated syndromes: allergic bronchopulmonary aspergillosis (ABPA) may complicate asthma, thus leading to bronchiectasis as part of the diagnostic criteria of ABPA or can complicate preexisting bronchiectasis due to another etiology...
October 28, 2016: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/27790272/a-mitochondrial-perspective-of-chronic-obstructive-pulmonary-disease-pathogenesis
#16
REVIEW
Min-Jong Kang, Gerald S Shadel
Chronic obstructive pulmonary disease (COPD) encompasses several clinical syndromes, most notably emphysema and chronic bronchitis. Most of the current treatments fail to attenuate severity and progression of the disease, thereby requiring better mechanistic understandings of pathogenesis to develop disease-modifying therapeutics. A number of theories on COPD pathogenesis have been promulgated wherein an increase in protease burden from chronic inflammation, exaggerated production of reactive oxygen species and the resulting oxidant injury, or superfluous cell death responses caused by enhanced cellular injury/damage were proposed as the culprit...
October 2016: Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/27767327/lung-dendritic-cells-shaping-immune-responses-throughout-copd-progression
#17
Christine M Freeman, Jeffrey L Curtis
Hallmarks of chronic obstructive pulmonary disease (COPD) include innate inflammation and remodeling of small airways that begin in early disease and the development of lung lymphoid follicles (LLF), indicative of adaptive immunity, in more spirometrically-severe stages. Common to these processes in all stages is orchestration by dendritic cells (DC). Recently improved understanding of the analogous lung DC subsets in humans and mice has allowed for better integration and interpretation of the experimental and clinical pathological literature...
October 21, 2016: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/27751187/neutrophil-elastase-cleaves-epithelial-cadherin-in-acutely-injured-lung-epithelium
#18
Rachel Boxio, Julien Wartelle, Béatrice Nawrocki-Raby, Brice Lagrange, Laurette Malleret, Timothee Hirche, Clifford Taggart, Yves Pacheco, Gilles Devouassoux, Abderrazzaq Bentaher
BACKGROUND: In acutely injured lungs, massively recruited polymorphonuclear neutrophils (PMNs) secrete abnormally neutrophil elastase (NE). Active NE creates a localized proteolytic environment where various host molecules are degraded leading to impairment of tissue homeostasis. Among the hallmarks of neutrophil-rich pathologies is a disrupted epithelium characterized by the loss of cell-cell adhesion and integrity. Epithelial-cadherin (E-cad) represents one of the most important intercellular junction proteins...
October 17, 2016: Respiratory Research
https://www.readbyqxmd.com/read/27749084/cross-species-transcriptome-profiling-identifies-new-alveolar-epithelial-type-i-cell-specific-genes
#19
Crystal N Marconett, Beiyun Zhou, Mitsuhiro Sunohara, Tiffany M Pouldar, HongJun Wang, Yixin Liu, Megan E Rieger, Evelyn Tran, Per Flodby, Kimberly D Siegmund, Edward D Crandall, Ite A Laird-Offringa, Zea Borok
Diseases involving the distal lung alveolar epithelium include chronic obstructive pulmonary disease (COPD), idiopathic pulmonary fibrosis (IPF) and lung adenocarcinoma. Accurate labeling of specific cell types is critical for determining the contribution of each to pathogenesis of these diseases. The distal lung alveolar epithelium is comprised of two cell types, alveolar epithelial type 1 (AT1) and type 2 (AT2) cells. While cell type-specific markers, most prominently surfactant protein C (SFTPC), have allowed detailed lineage tracing studies of AT2 cell differentiation and their roles in disease, studies of AT1 cells have been hampered by lack of genes with expression unique to AT1 cells...
October 17, 2016: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/27729261/dendritic-cells-in-human-lung-disease-recent-advances
#20
John W Upham, Yang Xi
Dendritic cells (DC) are potent antigen presenting cells. Because of their particular ability to initiate and regulate cell mediated and humoral immune responses, there is considerable interest in the role that DC play in the pathogenesis of various lung diseases, especially those in which there is an excessive immune response to specific antigens (as in asthma) or a deficient immune response (as in lung cancer). A number of DC subpopulations have been defined in the lungs including myeloid or conventional DC that initiate T-cell immunity and antibody production, and plasmacytoid DC that have an important role in anti-viral immunity and immune tolerance...
October 8, 2016: Chest
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