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Asthmatic Patients with Vitamin D Deficiency have Decreased Exacerbations after Vitamin Replacement

Authors :
Paolo Solidoro
Michela Bellocchia
Ilaria Aredano
Alessio Mattei
Emanuele Pivetta
Filippo Patrucco
Monica Boita
Francesca de Blasio
Luisa Brussino
Giovanni Rolla
Caterina Bucca
Source :
Nutrients, Vol 9, Iss 11, p 1234 (2017)
Publication Year :
2017
Publisher :
MDPI AG, 2017.

Abstract

Background: Intervention studies with vitamin D in asthma are inconclusive for several reasons, such as inadequate dosing or duration of supplementation or uncontrolled baseline vitamin D status. Our aim was to evaluate the benefit of long term vitamin D add-on in asthmatic patients with actual vitamin D deficiency, that is a serum 25-hydroxy vitamin D (25-OHD ) below 20 ng/mL. Methods: Serum 25-OHD, asthma exacerbations, spirometry and inhaled corticosteroids (CS) dose were evaluated in a cohort of 119 asthmatic patients. Patients with deficiency were evaluated again after one year vitamin supplementation. Results: 25-OHD was low in 111 patients and was negatively related to exacerbations (p < 0.001), inhaled CS dose (p = 0.008) and asthma severity (p = 0.001). Deficiency was found in 90 patients, 55 of whom took the supplement regularly for one year, while 24 discontinued the study and 11 were not adherent. Patients with vitamin D deficiency after 12 months supplementation showed significant decrease of exacerbations (from 2.6 ± 1.2 to 1.6 ± 1.1, p < 0.001), circulating eosinophils (from 395 ± 330 to 272 ± 212 106/L, p < 0.001), and need of oral CS courses (from 35 to 20, p = 0.007) and improvement of airway obstruction. Conclusions: Asthma exacerbations are favored by vitamin D deficiency and decrease after long-term vitamin D replacement. Patients who are vitamin D deficient benefit from vitamin D supplementation.

Details

Language :
English
ISSN :
20726643
Volume :
9
Issue :
11
Database :
Directory of Open Access Journals
Journal :
Nutrients
Publication Type :
Academic Journal
Accession number :
edsdoj.7529fc344bb14a6c86c97b0af22143d5
Document Type :
article
Full Text :
https://doi.org/10.3390/nu9111234