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  • Title: Inflammatory and immunological biomarkers are not related to survival in adults with Cystic Fibrosis.
    Author: Moffitt KL, Martin SL, Jones AM, Webb AK, Cardwell C, Tunney MM, Elborn JS.
    Journal: J Cyst Fibros; 2014 Jan; 13(1):63-8. PubMed ID: 23860440.
    Abstract:
    BACKGROUND: Chronic Pseudomonas aeruginosa pulmonary infection is associated with a decline in lung function and reduced survival in people with Cystic Fibrosis (CF). Damaging inflammatory and immunological mediators released in the lungs can be used as markers of chronic infection, inflammation and lung tissue damage. METHODS: Clinical samples were collected from CF patients and healthy controls. Serum IgG and IgA anti-Pseudomonas antibodies, sputum IL-8 and TNFα, plasma IL-6 and urine TNFr1 were measured by ELISA. Sputum neutrophil elastase (NE), cathepsin S and cathepsin B were measured by spectrophotometric and fluorogenic assays. The relationship between IgG and IgA, inflammatory mediators and long-term survival was determined. RESULTS: IgG and IL-6 positively correlated with mortality. However, multivariate analysis demonstrated that after adjusting for FEV(1), IgG was not independently related to mortality. A relationship was observed between IgG and IL-6, TNFα, TNFr1 and between IgA and IL8, cathepsin S and cathepsin B. CONCLUSIONS: These data indicate that biomarkers of inflammation are not independent predictors of survival in people with CF.
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