• Scott D Sagel, Umer Khan, Raksha Jain, Gavin Graff, Cori L Daines, Jordan M Dunitz, Drucy Borowitz, David M Orenstein, Ibrahim Abdulhamid, Julie Noe, John P Clancy, Bonnie Slovis, Michael J Rock, Karen S McCoy, Steven Strausbaugh, Floyd R Livingston, Konstantinos A Papas, and Michele L Shaffer.
• 1 Department of Pediatrics, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, Colorado.
• Am. J. Respir. Crit. Care Med. 2018 Sep 1; 198 (5): 639647639-647.

RationaleCystic fibrosis (CF) is characterized by dietary antioxidant deficiencies, which may contribute to an oxidant-antioxidant imbalance and oxidative stress.ObjectivesEvaluate the effects of an oral antioxidant-enriched multivitamin supplement on antioxidant concentrations, markers of inflammation and oxidative stress, and clinical outcomes.MethodsIn this investigator-initiated, multicenter, randomized, double-blind, controlled trial, 73 pancreatic-insufficient subjects with CF 10 years of age and older with an FEV1 between 40% and 100% predicted were randomized to 16 weeks of an antioxidant-enriched multivitamin or control multivitamin without antioxidant enrichment. Endpoints included systemic antioxidant concentrations, markers of inflammation and oxidative stress, clinical outcomes (pulmonary exacerbations, anthropometric measures, pulmonary function), safety, and tolerability.Measurements And Main ResultsChange in sputum myeloperoxidase concentration over 16 weeks, the primary efficacy endpoint, was not significantly different between the treated and control groups. Systemic antioxidant (β-carotene, coenzyme Q10, γ-tocopherol, and lutein) concentrations significantly increased in the antioxidant-treated group (P < 0.001 for each), whereas circulating calprotectin and myeloperoxidase decreased in the treated group compared with the control group at Week 4. The treated group had a lower risk of first pulmonary exacerbation requiring antibiotics than the control group (adjusted hazard ratio, 0.50; P = 0.04). Lung function and growth endpoints did not differ between groups. Adverse events and tolerability were similar between groups.ConclusionsAntioxidant supplementation was safe and well tolerated, resulting in increased systemic antioxidant concentrations and modest reductions in systemic inflammation after 4 weeks. Antioxidant treatment was also associated with a lower risk of first pulmonary exacerbation. Clinical trial registered with www.clinicaltrials.gov (NCT01859390).

27 keywords...

hide…