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  • Title: Decreased interleukin-18 expression in BAL cells and peripheral blood mononuclear cells in adult cystic fibrosis patients.
    Author: Hauber HP, Beyer IS, Meyer A, Pforte A.
    Journal: J Cyst Fibros; 2004 Jun; 3(2):129-31. PubMed ID: 15463896.
    Abstract:
    Lymphocytes from cystic fibrosis (CF) patients secrete less interferon-gamma (IFN-gamma) upon stimulation compared to controls. Expression of interleukin (IL)-18 as an IFN-gamma inducing factor and of IL-10 as an IL-18 inhibiting factor were determined in bronchoalveolar lavage (BAL) cells from CF patients (n=5) and from normal control subjects (n=9) as well as in peripheral blood mononuclear cells (PBMC) from patients (n=12) and from control subjects (n=9) with RT-PCR. IL-18 and IL-10 serum protein levels were measured using ELISA. BAL cells and PBMC of CF patients expressed significantly less IL-18 compared to controls (p<0.05). There was no significant difference for IL-10 in BAL cells. However, PBMC from patients expressed significantly more IL-10 mRNA (p<0.05). IL-18 serum protein levels were decreased in the patient group, whereas IL-10 serum concentrations were elevated. Stimulation with rhIL-10 reduced IL-18 expression in PBMC from CF patients. Decreased IL-18 expression in CF patients may contribute to decreased IFN-gamma production. IL-10 may contribute to inhibit IL-18 expression in PBMC in CF.
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