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- W1995567124 abstract "Our objectives were to 1) assess cord blood vitamin D concentrations from healthy term newborns, 2) ascertain whether cord blood vitamin D insufficiency precludes optimal induction of the Toll-like receptor (TLR) antimicrobial pathway in monocytes, and 3) determine whether in vitro supplementation with 25-hydroxyvitamin D3 [25(OH)D3] and/or 1,25-dihydroxyvitamin D3 [1,25(OH)2D3] restores TLR-induced antimicrobial responses. Plasma concentrations of 25(OH)D and 1,25(OH)2D were measured from cord blood of 23 newborns. Human monocytes were cultured in cord blood plasma and stimulated with TLR2 and TLR4 ligands, and then antimicrobial gene expression was analyzed using quantitative PCR. Cord blood 25(OH)D and 1,25(OH)2D concentrations were positively correlated to each other (r = 0.78; P <0.0001). Compared with those conditioned in vitamin D-sufficient plasma [25(OH)D > 75 nmol/liter], monocytes cultured in severely vitamin D-deficient plasma [25(OH)D < 30 nmol/liter] exhibited decreased TLR-induced cathelicidin expression (P <0.05). Supplementation in vitro of vitamin D-deficient plasma with 25(OH)D3 increased antimicrobial peptide gene expression. Cord blood vitamin D deficiency, by its effects on TLR-induced antimicrobial production, altered in vitro monocyte responses. The observation that exogenous 25(OH)D3 in vitro recovered TLR-induced antimicrobial responses suggests the need for additional prospective investigations to further delineate the role of vitamin D in the newborn immune response." @default.
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- W1995567124 date "2011-06-01" @default.
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- W1995567124 title "Cord Blood Vitamin D Status Impacts Innate Immune Responses" @default.
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- W1995567124 doi "https://doi.org/10.1210/jc.2010-1559" @default.
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