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    Small macrophages are present in early childhood respiratory disease

    Access Status
    Open access via publisher
    Authors
    Garratt, L.
    Wright, A.
    Ranganathan, S.
    Grigg, J.
    Sly, P.
    Douglas, T.
    Gangell, C.
    Hall, Graham
    Kicic, A.
    Mott, L.
    Skoric, B.
    Date
    2012
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Garratt, L. and Wright, A. and Ranganathan, S. and Grigg, J. and Sly, P. and Douglas, T. and Gangell, C. et al. 2012. Small macrophages are present in early childhood respiratory disease. Journal of Cystic Fibrosis. 11 (3): pp. 201-208.
    Source Title
    Journal of Cystic Fibrosis
    DOI
    10.1016/j.jcf.2011.11.008
    ISSN
    1569-1993
    School
    School of Physiotherapy and Exercise Science
    URI
    http://hdl.handle.net/20.500.11937/54466
    Collection
    • Curtin Research Publications
    Abstract

    Background: Recently, an established "small macrophage" phenotype has been observed in the sputum of patients with CF and COPD. However, little is known about the prevalence of this phenotype in the airways of young children. Since respiratory inflammation begins early in CF, we hypothesised that these small macrophages would be increased in paediatric CF bronchoalveolar lavage (BAL). Methods: Macrophage populations in CF and disease control BAL were assessed by multicolour flow cytometry. BAL inflammatory indices were collected as part of the AREST-CF programme. Results: Small macrophages were present in CF (n = 35, mean 36 ± 12% of BAL macrophages) but not significantly different to the respiratory disease controls (n = 7, mean 40 ± 21%). Number of small macrophages correlated significantly with number of BAL neutrophils (r = 0.44, p< 0.01) but not infection or IL-8. Conclusions: In paediatric patients small macrophages are not unique to CF, but their establishment as the dominant phenotype in adults may be due to chronicity of inflammation and infection.

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