Free 25(OH)D concentrations are associated with atopy and lung function in children with asthma.
Ann Allergy Asthma Immunol
; 119(1): 37-41, 2017 07.
Article
em En
| MEDLINE
| ID: mdl-28533007
BACKGROUND: Evidence suggests free mono-hydroxyvitamin D (25[OH]D) concentrations are more strongly linked to certain outcomes than total concentrations; however, no studies have examined the relation between free 25(OH)D and respiratory or allergic disease. OBJECTIVE: To examine associations between total and free 25(OH)D concentrations and asthma outcomes. METHODS: We quantified total and free 25(OH)D concentrations in 137 Peruvian children with asthma and 152 children without asthma and examined associations with asthma outcomes. RESULTS: Mean age ± SD was 13 ± 2.5 years, and 50.2% were boys. Mean total and measured free 25(OH)D concentrations were 29 ± 9.5 ng/mL and 5.0 ± 1.3 pg/mL, respectively. Lower free but not total 25(OH)D concentrations were significantly associated with atopy in all children (total, odds ratio [OR] 1.3 per 10-ng/mL decrease, 95% confidence interval [CI] 0.95-1.7, P = .12; vs free, OR 1.3 per 1-pg/mL decrease, 95% CI 1.0-1.6, P = .02) and children with asthma (total, OR 1.1 per 10-ng/mL decrease, 95% CI 0.75-1.7, P = .57; vs free, OR 1.6 per 1-pg/mL decrease, 95% CI 1.0-2.5, P = .04). Free but not total 25(OH)D levels were significantly associated with pre-bronchodilator forced expiratory volume in 1 second (total, 0.11 L, -0.12 to 0.34, P = .34; vs free, 0.20 L, 0.021-0.39, P = .03) and forced vital capacity (total, 0.13 L, -0.12 to 0.37, P = .31; vs free, 0.22 L, 0.026-0.42, P = .03) Z-scores in children with asthma. CONCLUSION: Atopy, forced expiratory volume in 1 second, and forced vital capacity were more strongly linked to free than to total 25(OH)D concentrations, suggesting the free form might be more relevant in modulating allergic disease risk and pulmonary function in children with asthma.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Asma
/
Calcifediol
/
Hipersensibilidade Imediata
/
Pulmão
Tipo de estudo:
Etiology_studies
/
Observational_studies
/
Prevalence_studies
/
Risk_factors_studies
Limite:
Adolescent
/
Adult
/
Child
/
Female
/
Humans
/
Male
País/Região como assunto:
America do sul
/
Peru
Idioma:
En
Revista:
Ann Allergy Asthma Immunol
Assunto da revista:
ALERGIA E IMUNOLOGIA
Ano de publicação:
2017
Tipo de documento:
Article
País de publicação:
Estados Unidos