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Abstract Title:

Clinical impact of vitamin D treatment in cystic fibrosis: a pilot randomized, controlled trial.

Abstract Source:

Eur J Clin Nutr. 2016 Dec 14. Epub 2016 Dec 14. PMID: 27966575

Abstract Author(s):

T Pincikova, D Paquin-Proulx, J K Sandberg, M Flodström-Tullberg, L Hjelte

Article Affiliation:

T Pincikova

Abstract:

BACKGROUND/OBJECTIVES: Vitamin D insufficiency in cystic fibrosis is common. Vitamin D3 is currently preferred over D2. We aimed to study the efficacy of vitamin D2 and D3 at increasing serum 25-hydroxyvitamin D (s25OHD) concentrations and their effect on respiratory health in cystic fibrosis.

SUBJECTS/METHODS: Sixteen CF patients were randomized to receive vitamin D2 or D3 or to serve as controls. The starting dose of 5000 IU (<16 years old) or 7143 IU/day (⩾16 years old) was further individually adjusted. Three months of intervention were followed by two of washout (ClinicalTrials.gov NCT01321905).

RESULTS: To increase s25OHD, the mean daily dose of vitamin D2 and D3 had to be increased up to 15650 and 8184 IU, respectively. The combined group of vitamin D2 and D3 treated patients decreased plasma IL-8 (P<0.05). Patients provided vitamin D3 improved FVC at the end of the trial (P<0.05). Change in s25OHD was positively correlated with changes in the adult Quality-of-Life respiratory score at the end of supplementation (P=0.006, r=0.90), and with changes in FEV1 (P=0.042, r=0.62) and FVC (P=0.036, r=0.63) at one month of washout.

CONCLUSIONS: Vitamin D supplementation may contribute to reduced inflammation and improved lung function in CF.European Journal of Clinical Nutrition advance online publication, 14 December 2016; doi:10.1038/ejcn.2016.259.

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Sayer Ji
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