PMID: 11916752Mar 28, 2002Paper

Increased plasma fatty acid concentrations after respiratory exacerbations are associated with elevated oxidative stress in cystic fibrosis patients

The American Journal of Clinical Nutrition
Lisa G WoodM L Garg

Abstract

Oxidative stress and depleted antioxidant defenses occur in stable cystic fibrosis patients. During acute infection, the balance between oxidants and antioxidants may be further disturbed. We examined the oxidative stress during acute infection in cystic fibrosis patients by measuring 8-iso-prostaglandin F(2 alpha) (8-iso-PGF(2 alpha)) and antioxidant defenses in relation to dietary intake, fatty acid status, immune function, and clinical status. Plasma concentrations of total 8-iso-PGF(2 alpha), vitamins E and C, beta-carotene, zinc, selenium, and copper; plasma fatty acid compositions; erythrocyte glutathione concentrations; glutathione peroxidase and superoxide dismutase activity; sputum glutathione and 8-iso-PGF(2 alpha) concentrations; lung function; clinical symptoms; and dietary intake were measured in 15 cystic fibrosis patients before and after 10-14 d of intravenous antibiotic treatment for a pulmonary exacerbation. After treatment, respiratory status improved (percentage of forced expiratory volume in 1 s: 60 +/- 6% at baseline compared with 74 +/- 7% after treatment, P = 0.01), quality of well-being improved (P = 0.001), and total plasma 8-iso-PGF(2 alpha) concentrations increased from 469 nmol/L at baseline (interq...Continue Reading

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