Poverty and InequalitySexual and Reproductive HealthFamily, Maternal & Child HealthMethodology

Longitudinal trajectory of vitamin D status from birth to early childhood in the development of food sensitization

TitleLongitudinal trajectory of vitamin D status from birth to early childhood in the development of food sensitization
Publication TypeJournal Article
Year of Publication2013
AuthorsLiu, X, Arguelles, L, Zhou, Y, Wang, G, Chen, Q, Tsai, HJ, Hong, X, Liu, R, Price, HE, Pearson, C, Apollon, S, Cruz, N, Schleimer, R, Langman, CB, Pongracic, JA, Wang, X
JournalPediatric Research
Date PublishedSep
ISBN Number1530-0447 (Electronic)0031-3998 (Linking)
Accession Number23797532

BACKGROUND: Increasing evidence supports the immunomodulatory effect of vitamin D on allergic diseases. The combined role of prenatal and postnatal vitamin D status in the development of food sensitization (FS) and food allergy remains understudied. METHODS: Plasma 25-hydroxyvitamin D (25(OH)D) levels of 460 children in the Boston Birth Cohort (BBC) were measured at birth and early childhood, and the subjects were genotyped for rs2243250 (C-590T) in the IL4 gene. We defined FS as specific IgE levels of >/=0.35 kUA/l to any of eight common food allergens; we defined persistently low vitamin D status as cord blood 25(OH)D <11 ng/ml and postnatal 25(OH)D <30 ng/ml. RESULTS: We observed a moderate correlation between cord blood 25(OH)D at birth and venous blood 25(OH)D measured at 2-3 y (r = 0.63), but a weak correlation at <1 y (r = 0.28). There was no association between low vitamin D status and FS at any single time point alone. However, in combination, persistence of low vitamin D status at birth and in early childhood increased the risk of FS (odds ratio (OR) = 2.03, 95% confidence interval (CI): 1.02-4.04), particularly among children carrying the C allele of rs2243250 (OR = 3.23, 95% CI: 1.37-7.60). CONCLUSION: Prenatal and early postnatal vitamin D levels, along with individual genetic susceptibility, should be considered in assessing the role of vitamin D in the development of FS and food allergy.