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Pathogenesis of COPD

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https://www.readbyqxmd.com/read/28053515/gender-differences-in-the-t-cell-profiles-of-the-airways-in-copd-patients-associated-with-clinical-phenotypes
#1
Helena Forsslund, Mingxing Yang, Mikael Mikko, Reza Karimi, Sven Nyrén, Benita Engvall, Johan Grunewald, Heta Merikallio, Riitta Kaarteenaho, Jan Wahlström, Åsa M Wheelock, C Magnus Sköld
T lymphocytes are believed to play an important role in the pathogenesis of chronic obstructive pulmonary disease (COPD). How T cells are recruited to the lungs and contribute to the inflammatory process is largely unknown. COPD is a heterogeneous disease, and discriminating disease phenotypes based on distinct molecular and cellular pathways may provide new approaches for individualized diagnosis and therapies. Bronchoalveolar lavage (BAL) and blood samples were obtained from 40 never-smokers, 40 smokers with normal lung function, and 38 COPD patients...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28039405/role-of-baff-in-pulmonary-autoantibody-responses-induced-by-chronic-cigarette-smoke-exposure-in-mice
#2
Mathieu C Morissette, Yang Gao, Pamela Shen, Danya Thayaparan, Jean-Christophe Bérubé, Peter D Paré, Corry-Anke Brandsma, Ke Hao, Yohan Bossé, Rachel Ettinger, Ronald Herbst, Alison A Humbles, Roland Kolbeck, Nanshan Zhong, Rongchang Chen, Martin R Stämpfli
Emerging evidence suggests that autoimmune processes are implicated in the pathogenesis of chronic obstructive pulmonary disease (COPD). In this study, we assessed the expression of B-cell activating factor (BAFF) in smokers, and investigated the functional importance of BAFF in the induction and maintenance of cigarette smoke-induced pulmonary antinuclear antibodies (ANA) and tertiary lymphoid tissues (TLTs) using a preclinical mouse model. We observed that BAFF levels were elevated in smokers and mice exposed to cigarette smoke...
December 2016: Physiological Reports
https://www.readbyqxmd.com/read/28030992/macrolides-a-promising-pharmacologic-therapy-for-chronic-obstructive-pulmonary-disease
#3
Shilin Qiu, Xiaoning Zhong
Chronic inflammation plays a central role in the pathogenesis of chronic obstructive pulmonary disease (COPD). However, there are no effective anti-inflammatory pharmacologic therapies available for COPD so far. Recent evidence suggests that an immunologic mechanism has a role in the pathogenesis of COPD. Macrolides possess anti-inflammatory and immune-modulating effects may be helpful in the treatment of COPD. Several clinical studies have shown that long-term use of macrolides reduces the frequency of COPD exacerbations...
December 1, 2016: Therapeutic Advances in Respiratory Disease
https://www.readbyqxmd.com/read/28024128/-pathogenesis-diagnosis-and-treatment-of-chronic-obstructive-pulmonary-disease-in-the-light-of-new-research
#4
EDITORIAL
Tadeusz Płusa
Accurate number of patients with chronic obtructive pulmonary disease (COPD) is difficult to determine, both in Poland and in the world. Quoted estimates and fragmented with the research indicate that approx. 10% of the world's population may be burdened by this disease. As it turns out, COPD is recognized in 25-45% in non-smokers, suggesting a genetic link. This is confirmed by new data that indicates that further embodiments having genetic polymorphisms associated with the occurrence of the disease. It was further found that the allele GC-1F vitamin D were risk factor for development of COPD...
December 22, 2016: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28006950/augmentation-of-s-nitrosoglutathione-gsno-controls-cigarette-smoke-induced-inflammatory-oxidative-stress-and-copd-emphysema-pathogenesis-by-restoring-cftr-function
#5
Manish Bodas, David Silverberg, Kyla Walworth, Kathryn A Brucia, Neeraj Vij
AIMS: Cigarette-smoke (CS) mediated CFTR-dysfunction, autophagy-impairment, and resulting inflammatory-oxidative/nitrosative stress leads to COPD-emphysema pathogenesis. Nitric oxide (NO)-signaling regulates lung function, and low serum NO-levels correlate with COPD severity. We aim to evaluate here the effects and mechanism(s) of GSNO-augmentation in COPD-emphysema pathogenesis. RESULTS: Our data shows that CFTR co-localizes with aggresome-bodies in the lungs of COPD subjects with increasing emphysema severity (GOLD I-IV) as compared to non-emphysema controls (GOLD-0)...
December 22, 2016: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28005418/wnt-signaling-in-lung-aging-and-disease
#6
Mareike Lehmann, Hoeke A Baarsma, Melanie Königshoff
Chronic lung diseases, such as chronic obstructive pulmonary disease (COPD) and idiopathic pulmonary fibrosis (IPF), represent a significant and increasing health burden. Current therapies are largely symptomatic, and novel therapeutic approaches are needed. Aging has emerged as a contributing factor for the development of both IPF and COPD because their prevalence increases with age, and several pathological features of these diseases resemble classical hallmarks of aging. Aging is thought to be driven in part by aberrant activity of developmental signaling pathways that thus might drive pathological changes, a process termed antagonistic pleiotropy or developmental drift...
December 2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28005183/altered-gray-matter-volume-in-stable-chronic-obstructive-pulmonary-disease-with-subclinical-cognitive-impairment-an-exploratory-study
#7
Chunrong Wang, Yanhui Ding, Bixian Shen, Dehong Gao, Jie An, Kewen Peng, Gangqiang Hou, Liqiu Zou, Mei Jiang, Shijun Qiu
Gray matter volume deficits have been identified in cognitively impaired patients with chronic obstructive pulmonary disease (COPD). However, it remains unknown whether the gray matter volume is altered in COPD patients with subclinical cognitive impairment. To determine whether any gray matter abnormalities are present in these patients, neuropsychological tests and structural MRI data were analyzed from 60 patients with COPD and 60 age-, gender-, education-, and handedness-matched normal controls (NCs). The COPD patients had similar Mini-Mental State Examination (MMSE) scores compared with the NCs...
December 22, 2016: Neurotoxicity Research
https://www.readbyqxmd.com/read/27998433/-effects-of-mtor-cdc42-signaling-pathway-on-phagocytosis-of-alveolar-macrophages-in-chronic-obstructive-pulmonary-disease-mice
#8
Y J Wang, X J Liu, M M Dang, X L Zeng, H R Bao
Objective: To investigate effects of mammalian target of rapamycin (mTOR)- cell division cycle 42 (Cdc42) signaling pathway on phagocytosis of alveolar macrophages (AMs) in chronic obstructive pulmonary disease (COPD) mice. Methods: Forty mice were randomly divided into control group and model group. Each group contained 20 mice. COPD model group were established by cigarette smoking exposure. AMs were isolated from lung tissue by discontinuous density gradient centrifugation. AMs from control group were divided into health control group and rapamycin control group while AMs from model group were divided into COPD group and rapamycin COPD group...
December 13, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/27994590/cigarette-smoke-induction-of-interleukin-27-wsx-1-regulates-the-differentiation-of-th1-and-th17-cells-in-a-smoking-mouse-model-of-emphysema
#9
Shi-Lin Qiu, Min-Chao Duan, Yi Liang, Hai-Juan Tang, Guang-Nan Liu, Liang-Ming Zhang, Chao-Mian Yang
IFN-γ-producing CD4(+) T (Th1) cells and IL-17-producing CD4(+) T (Th17) cells play a critical role in the pathogenesis of chronic obstructive pulmonary disease (COPD). However, the immune regulation between Th1 and Th17 cells remains unclear. Previous studies have demonstrated that interleukin-27 (IL-27)/WSX-1 exerted pro- or anti-inflammatory effects in many acute inflammatory diseases by modulating T cell-mediated immune response, but little was known about its role in chronic inflammatory disease, especially in smoking-related lung diseases...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27993290/increased-levels-of-prostaglandin-e-major-urinary-metabolite-pge-mum-in-chronic-fibrosing-interstitial-pneumonia
#10
Tsugumi Horikiri, Hiromichi Hara, Nayuta Saito, Jun Araya, Naoki Takasaka, Hirofumi Utsumi, Haruhiko Yanagisawa, Mitsuo Hashimoto, Yutaka Yoshii, Hiroshi Wakui, Shunsuke Minagawa, Takeo Ishikawa, Kenichiro Shimizu, Takanori Numata, Seiji Arihiro, Yumi Kaneko, Katsutoshi Nakayama, Tomokazu Matsuura, Masaaki Matsuura, Mutsunori Fujiwara, Isao Okayasu, Satoru Ito, Kazuyoshi Kuwano
BACKGROUND: Dysregulation of the prostaglandin E2 (PGE2) signaling pathway has been implicated in interstitial pneumonia (IP) pathogenesis. Due to the unstable nature of PGE2, available detection methods may not precisely reflect PGE2 levels. We explored the clinical usefulness of measuring stable prostaglandin E-major urinary metabolite (PGE-MUM) with respect to pathogenesis and extent of chronic fibrosing IP (CFIP), including idiopathic pulmonary fibrosis (IPF), as PGE-MUM is reflective of systemic PGE2 production...
January 2017: Respiratory Medicine
https://www.readbyqxmd.com/read/27979969/noncanonical-wnt-5a-signaling-impairs-endogenous-lung-repair-in-copd
#11
Hoeke A Baarsma, Wioletta Skronska-Wasek, Kathrin Mutze, Florian Ciolek, Darcy E Wagner, Gerrit John-Schuster, Katharina Heinzelmann, Andreas Günther, Ken R Bracke, Maylis Dagouassat, Jorge Boczkowski, Guy G Brusselle, Ron Smits, Oliver Eickelberg, Ali Ö Yildirim, Melanie Königshoff
Chronic obstructive pulmonary disease (COPD) is a leading cause of death worldwide. One main pathological feature of COPD is the loss of functional alveolar tissue without adequate repair (emphysema), yet the underlying mechanisms are poorly defined. Reduced WNT-β-catenin signaling is linked to impaired lung repair in COPD; however, the factors responsible for attenuating this pathway remain to be elucidated. Here, we identify a canonical to noncanonical WNT signaling shift contributing to COPD pathogenesis...
January 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/27965780/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
#12
F Braido, N Scichilone, F Lavorini, O S Usmani, L Dubuske, L P Boulet, R Mosges, C Nunes, M Sánchez-Borges, I J Ansotegui, M Ebisawa, F Levi-Schaffer, L J Rosenwasser, J Bousquet, T Zuberbier, G Walter Canonica
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: Asthma research and practice
https://www.readbyqxmd.com/read/27956907/lymphocyte-kv1-3-channels-in-the-pathogenesis-of-chronic-obstructive-pulmonary-disease-novel-therapeutic-implications-of-targeting-the-channels-by-commonly-used-drugs
#13
REVIEW
Itsuro Kazama, Tsutomu Tamada
In patients with chronic obstructive pulmonary disease (COPD), over-activated T-lymphocytes produce pro-inflammatory cytokines and proliferate in situ in the lower airways and pulmonary parenchyma, contributing substantially to the pathogenesis of the disease. Despite our understanding of the molecular mechanisms by which lymphocytes are activated, we know little about the physiological mechanisms. T-lymphocytes predominantly express delayed rectifier K(+)-channels (Kv1.3) in their plasma membranes and these channels play crucial roles in inducing the lymphocyte activation and proliferation...
2016: Allergy, Asthma, and Clinical Immunology
https://www.readbyqxmd.com/read/27942209/association-of-serum-ferritin-levels-with-smoking-and-lung-function-in-the-korean-adult-population-analysis-of-the-fourth-and-fifth-korean-national-health-and-nutrition-examination-survey
#14
Chan Ho Lee, Eun Kyung Goag, Su Hwan Lee, Kyung Soo Chung, Ji Ye Jung, Moo Suk Park, Young Sam Kim, Se Kyu Kim, Joon Chang, Joo Han Song
BACKGROUND: Iron-catalyzed oxidative stress contributes to lung injury after exposure to various toxins, including cigarette smoke. An oxidant/antioxidant imbalance is considered to play a critical role in the pathogenesis of COPD. Ferritin is a key protein in iron homeostasis, and its capacity to oxidize and sequester the metal preventing iron prooxidant activity implicates its possible role in the alteration of antioxidant imbalance. We investigated the relationship among cigarette smoking, lung function, and serum ferritin concentration in a large cohort representative of the Korean adult population...
2016: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/27940297/increased-levels-of-enzymes-involved-in-local-estradiol-synthesis-in-chronic-obstructive-pulmonary-disease
#15
G F J Konings, N L Reynaert, B Delvoux, F M Verhamme, K R Bracke, G G Brusselle, A Romano, J H J Vernooy
INTRODUCTION: Steroid hormones are involved in lung development, pulmonary inflammation, and lung cancer. Estrogen signaling and exposure may play a role in pulmonary disorders, including COPD. In both genders, estrogens can be generated locally in the lungs and this contributes importantly to the tissue exposure to these steroids. OBJECTIVE: To characterize and assess differences in localization of estrogen receptors and enzymes involved in the local generation of estrogens in COPD...
December 8, 2016: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/27909766/association-between-tlr2-tlr4-gene-polymorphisms-and-copd-phenotype-in-a%C3%A2-greek-cohort
#16
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
#17
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
#18
Carla Bellinghausen, Gernot G U Rohde, Paul H M Savelkoul, Emiel F M Wouters, Frank R M 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...
December 2016: Journal of General Virology
https://www.readbyqxmd.com/read/27888348/pathogenesis-of-copd-and-asthma
#19
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
#20
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
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