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      The etiologic origins for chronic obstructive pulmonary disease

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          Abstract

          COPD, characterized by long-term poorly irreversible airway limitation and persistent respiratory symptoms, has resulted in enormous challenges to human health worldwide, with increasing rates of prevalence, death, and disability. Although its origin was thought to be in the interactions of genetic with environmental factors, the effects of environmental factors on the disease during different life stages remain little known. Without clear mechanisms and radical cure for it, early screening and prevention of COPD seem to be important. In this review, we will discuss the etiologic origins for poor lung function and COPD caused by specific adverse effects during corresponding life stages, as well as try to find new insights and potential prevention strategies for this disease.

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          Most cited references 191

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          Wheezing rhinovirus illnesses in early life predict asthma development in high-risk children.

           Peter Shult,  L. Salazar-Huayna,  Ronald Gangnon … (2008)
          Virus-induced wheezing episodes in infancy often precede the development of asthma. Whether infections with specific viral pathogens confer differential future asthma risk is incompletely understood. To define the relationship between specific viral illnesses and early childhood asthma development. A total of 259 children were followed prospectively from birth to 6 years of age. The etiology and timing of specific viral wheezing respiratory illnesses during early childhood were assessed using nasal lavage, culture, and multiplex reverse transcriptase-polymerase chain reaction. The relationships of these virus-specific wheezing illnesses and other risk factors to the development of asthma were analyzed. Viral etiologies were identified in 90% of wheezing illnesses. From birth to age 3 years, wheezing with respiratory syncytial virus (RSV) (odds ratio [OR], 2.6), rhinovirus (RV) (OR, 9.8), or both RV and RSV (OR , 10) was associated with increased asthma risk at age 6 years. In Year 1, both RV wheezing (OR, 2.8) and aeroallergen sensitization (OR, 3.6) independently increased asthma risk at age 6 years. By age 3 years, wheezing with RV (OR, 25.6) was more strongly associated with asthma at age 6 years than aeroallergen sensitization (OR, 3.4). Nearly 90% (26 of 30) of children who wheezed with RV in Year 3 had asthma at 6 years of age. Among outpatient viral wheezing illnesses in infancy and early childhood, those caused by RV infections are the most significant predictors of the subsequent development of asthma at age 6 years in a high-risk birth cohort.
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            Basal cells as stem cells of the mouse trachea and human airway epithelium.

             Yan-xue Xue,  P. Clark,  Emma L. Rawlins … (2009)
            The pseudostratified epithelium of the mouse trachea and human airways contains a population of basal cells expressing Trp-63 (p63) and cytokeratins 5 (Krt5) and Krt14. Using a KRT5-CreER(T2) transgenic mouse line for lineage tracing, we show that basal cells generate differentiated cells during postnatal growth and in the adult during both steady state and epithelial repair. We have fractionated mouse basal cells by FACS and identified 627 genes preferentially expressed in a basal subpopulation vs. non-BCs. Analysis reveals potential mechanisms regulating basal cells and allows comparison with other epithelial stem cells. To study basal cell behaviors, we describe a simple in vitro clonal sphere-forming assay in which mouse basal cells self-renew and generate luminal cells, including differentiated ciliated cells, in the absence of stroma. The transcriptional profile identified 2 cell-surface markers, ITGA6 and NGFR, which can be used in combination to purify human lung basal cells by FACS. Like those from the mouse trachea, human airway basal cells both self-renew and generate luminal daughters in the sphere-forming assay.
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              Respiratory syncytial virus in early life and risk of wheeze and allergy by age 13 years.

               John R. Stein,  Joseph D. Sherrill,  Alvaro L F Martinez … (1999)
              The relation between lower respiratory tract illnesses in early life caused by the respiratory syncytial virus (RSV) and the subsequent development of wheezing and atopy in childhood is not well understood. We studied this relation in children who had lower respiratory tract illnesses that occurred before 3 years of age. Children were enrolled at birth and cases of lower respiratory tract illness were ascertained by a physician. Viral tests were done for specimens collected at the time of the illness. Children were classified into five groups according to type and cause of lower respiratory tract illness. Children were then followed prospectively up to age 13, and we measured frequency of wheezing, pulmonary function, and atopic status (allergy skin-prick tests, serum IgE concentrations). RSV lower respiratory tract illnesses were associated with an increased risk of infrequent wheeze (odds ratio 3.2 [95% CI 2.0-5.0], p < 0.001), and an increased risk of frequent wheeze (4.3 [2.2-8.7], p < or = 0.001) by age 6. Risk decreased markedly with age and was not significant by age 13. There was no association between RSV lower respiratory tract illnesses and subsequent atopic status. RSV lower respiratory tract illnesses were associated with significantly lower measurements of forced expiratory volume (2.11 [2.05-2.15], p < or = 0.001) when compared with those of children with no lower respiratory tract illnesses, but there was no difference in forced expiratory volume after inhalation of salbutamol. RSV lower respiratory tract illnesses in early childhood are an independent risk factor for the subsequent development of wheezing up to age 11 years but not at age 13. This association is not caused by an increased risk of allergic sensitisation.
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                Author and article information

                Journal
                Journal ID (nlm-ta): Int J Chron Obstruct Pulmon Dis
                Journal ID (iso-abbrev): Int J Chron Obstruct Pulmon Dis
                Journal ID (publisher-id): COPD
                Journal ID (pmc): copd
                Title: International Journal of Chronic Obstructive Pulmonary Disease
                Publisher: Dove
                ISSN (Print): 1176-9106
                ISSN (Electronic): 1178-2005
                Publication date (Electronic): 27 May 2019
                Publication date Collection: 2019
                Volume: 14
                Pages: 1139-1158
                Affiliations
                [1 ]Faculty of Environmental Science and Engineering, Kunming University of Science and Technology , Kunming City, Yunnan Province, People’s Republic of China
                [2 ]Medical School, Kunming University of Science and Technology , Kunming City, Yunnan Province, People’s Republic of China
                [3 ]Faculty of Life Science and Technology, Kunming University of Science and Technology , Kunming City, Yunnan Province, People’s Republic of China
                [4 ]The Pathology Department, First People‘s Hospital of Yunnan Province , Kunming City, Yunnan Province, People’s Republic of China
                [5 ]Department of Oncology, Yunfeng Hospital , Xuanwei City, Yunnan Province, People’s Republic of China
                [6 ]Department of Thoracic Surgery, Yunfeng Hospital , Xuanwei City, Yunnan Province, People’s Republic of China
                Author notes
                Correspondence: Xiangyang Kong; Tao Tang Medical School, Kunming University of Science and Technology , Jingming South Road 727, Kunming city, Yunnan Province650500, People’s Republic of China Email taoer2324@ 123456sina.com ; 3517826707@ 123456qq.com
                [*]

                These authors contributed equally to this work

                Article
                Publisher ID: 203215
                DOI: 10.2147/COPD.S203215
                PMC ID: 6549659
                Copyright statement: © 2019 Huang et al.
                License:

                This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution – Non Commercial (unported, v3.0) License ( http://creativecommons.org/licenses/by-nc/3.0/). By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms ( https://www.dovepress.com/terms.php).

                Page count
                Figures: 3, Tables: 3, References: 251, Pages: 20
                Categories
                Subject: Review

                Data availability:

                ScienceOpen disciplines: Respiratory medicine

                Keywords: cigarette smoking, chronic obstructive pulmonary disease, air pollution, risk factors, early origins, copd

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