25-OHD response to vitamin D supplementation in children: effect of dose but not GC haplotype.
Eur J Endocrinol
; 185(2): 333-342, 2021 Jul 07.
Article
en En
| MEDLINE
| ID: mdl-34128826
ABSTRACT
OBJECTIVE:
GC/DBP effects on response to vitamin D supplementation have not been well-studied. Thus we assessed free and total 25-OHD after vitamin D treatment across the six common GC haplotypes.DESIGN:
This double-blind, randomized study compared two vitamin D3 doses in healthy, urban-dwelling 6-month to 10-year-old children at-risk for vitamin D deficiency. Randomization was stratified by GC haplotype.METHODS:
Children were randomized to receive 2800 or 7000 International Units of vitamin D3 weekly. 25-OHD and 1,25(OH)2D were sampled at baseline and after 1-6 months of supplementation. RESULTS ANDCONCLUSIONS:
One hundred ninety-two of 225 enrolled subjects completed the study. After one month, total 25-OHD increased with both doses and were higher with 7000 IU/week (85.5 ± 22.8 nmol/L) compared to 2800 IU/week (76.8 ± 18.0 nmol/L), despite equivalent baseline levels. No further significant increase occurred at 6 months (89.8 ± 35.5 and 74.3 ± 18.3 nmol/L, respectively). Free 25-OHD similarly changed. 25-OHD differed among GC groups at baseline. Although no significant effects of individual GC haplotypes on incremental changes were evident, a trend toward an effect of combined 'at risk' GC alleles on response was evident (P = 0.06). Total 1,25(OH)2D showed modest increases, moreso with the larger dose. In urban-dwelling children at-risk for vitamin D deficiency, 1 month of vitamin D3 2800 IU/week increased 25-OHD across all GC haplotype groups, and somewhat enhanced with 7000 IU/week with no further significant increases after 6 months of supplementation. Free 25-OHD measures offer no monitoring advantage over total 25-OHD.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Deficiencia de Vitamina D
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Haplotipos
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25-Hidroxivitamina D 2
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Colecalciferol
Tipo de estudio:
Clinical_trials
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Diagnostic_studies
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Observational_studies
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Risk_factors_studies
Límite:
Child
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Child, preschool
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Female
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Humans
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Infant
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Male
Idioma:
En
Revista:
Eur J Endocrinol
Asunto de la revista:
ENDOCRINOLOGIA
Año:
2021
Tipo del documento:
Article
País de afiliación:
Estados Unidos