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    Vitamin D receptor agonists inhibit pro-inflammatory cytokine production from the respiratory epithelium in cystic fibrosis.

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    Authors
    McNally, P
    Coughlan, C
    Bergsson, G
    Doyle, M
    Taggart, C
    Adorini, L
    Uskokovic, M R
    El-Nazir, B
    Murphy, P
    Greally, P
    Greene, C M
    McElvaney, N G
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    Affiliation
    Department of Paediatric Respiratory Medicine, Adelaide and Meath Hospital incorporating the National Children's Hospital, Dublin 24, Ireland; Respiratory Research Division, Royal College of Surgeons in Ireland, Beaumont Hospital, Dublin 9, Ireland.
    Issue Date
    2011-07-22
    
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    Citation
    Vitamin D receptor agonists inhibit pro-inflammatory cytokine production from the respiratory epithelium in cystic fibrosis. 2011:notJ Cyst Fibros
    Journal
    Journal of cystic fibrosis : official journal of the European Cystic Fibrosis Society
    URI
    http://hdl.handle.net/10147/141004
    DOI
    10.1016/j.jcf.2011.06.013
    PubMed ID
    21784717
    Additional Links
    http://www.ncbi.nlm.nih.gov/pubmed/21784717
    Abstract
    BACKGROUND: 1,25-Dihydroxycholecalciferol (1,25(OH)(2)D(3)) has been shown to mitigate epithelial inflammatory responses after antigen exposure. Patients with cystic fibrosis (CF) are at particular risk for vitamin D deficiency. This may contribute to the exaggerated inflammatory response to pulmonary infection in CF. METHODS: CF respiratory epithelial cell lines were exposed to Pseudomonas aeruginosa lipopolysaccharide (LPS) and Pseudomonas conditioned medium (PCM) in the presence or absence of 1,25(OH)(2)D(3) or a range of vitamin D receptor (VDR) agonists. Levels of IL-6 and IL-8 were measured in cell supernatants, and cellular total and phosphorylated IκBα were determined. Levels of human cathelicidin antimicrobial peptide (hCAP18) mRNA and protein were measured in cells after treatment with 1,25(OH)(2)D(3). RESULTS: Pretreatment with 1,25(OH)(2)D(3) was associated with significant reductions in IL-6 and IL-8 protein secretion after antigen exposure, a finding reproduced with a range of low calcaemic VDR agonists. 1,25(OH)(2)D(3) treatment led to a decrease in IκBα phosphorylation and increased total cellular IκBα. Treatment with 1,25(OH)(2)D(3) was associated with an increase in hCAP18/LL-37 mRNA and protein levels. CONCLUSIONS: Both 1,25(OH)(2)D(3) and other VDR agonists significantly reduce the pro-inflammatory response to antigen challenge in CF airway epithelial cells. VDR agonists have significant therapeutic potential in CF.
    Item Type
    Article
    Language
    en
    ISSN
    1873-5010
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.jcf.2011.06.013
    Scopus Count
    Collections
    Beaumont Hospital

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