| Peripheral blood dendritic cell subtypes are significantly elevated in subjects with asthma. | |
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MedLine Citation:
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PMID: 21338429 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Background Dendritic cells (DCs) are crucial for the processing of antigens, T lymphocyte priming and the development of asthma and allergy. Smokers with asthma display altered therapeutic behaviour and a reduction in endobronchial DC CD83 expression compared with non-smokers with asthma. No information is available on the impact of smoking on peripheral blood DC profiles. Objective Determine peripheral blood DC profiles in subjects with and without asthma with differing smoking histories. Methods Forty-three asthmatics (17 smokers, nine ex-smokers and 17 never-smokers) and 16 healthy volunteers (nine smokers and seven never-smokers) were recruited. Spirometry, exhaled nitric oxide and venesection was performed. DC elution was by flow cytometry via the expression of DC surface markers [plasmacytoid (pDC) (BDCA-2, CD303), type 1 conventional (cDC) (BDCA-1, CD1c), and type 2 cDC (BDCA-3, CD141)]. Results Subjects with asthma displayed increases in all DC subtypes compared with normal never-smokers: [type 1 cDCs - asthma [median% (IQR)]: 0.59% (0.41, 0.74), normal never-smokers: 0.35% (0.26, 0.43), P=0.013]; type 2 cDCs - asthma: 0.04% (0.02, 0.06), normal never-smokers: 0.02% (0.01, 0.03), P=0.008 and pDCs - asthma: 0.32% (0.27, 0.46), normal never-smokers: 0.22% (0.17, 0.31), P=0.043, and increased pDC and type 1 cDCs compared with normal smokers. Smoking did not affect DC proportions in asthma. Cigarette smoking reduced pDC proportions in normal subjects [normal never-smokers: 0.22% (0.17, 0.31); normal smokers: 0.09% (0.08, 0.15), P=0.003]. Conclusions and Clinical Relevance This study shows for the first time that subjects with asthma display a large increase in peripheral blood DC proportions. Cigarette smoking in asthma did not affect the peripheral blood DC profile but did suppress pDC proportions in non-asthmatic subjects. Asthma is associated with a significant increase in circulating DCs, reflecting increased endobronchial levels and the importance of DCs to the development and maintenance of asthma. (Clinical trials.gov identifier: NCT00411320). |
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Authors:
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M Spears; C McSharry; I Donnelly; L Jolly; M Brannigan; J Thomson; J Lafferty; R Chaudhuri; M Shepherd; E Cameron; N C Thomson |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-2-21 |
Journal Detail:
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Title: Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology Volume: - ISSN: 1365-2222 ISO Abbreviation: - Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-2-22 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8906443 Medline TA: Clin Exp Allergy Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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© 2011 Blackwell Publishing Ltd. |
Affiliation:
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Departments of Respiratory MedicineImmunology, Institute of Infection, Immunity and Inflammation, Gartnavel General Hospital, University of Glasgow, Glasgow, UK. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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