Open AccessEfficacy of two different doses of oral vitamin D supplementation on inflammatory biomarkers and maternal and neonatal outcomes
Author(s) -
Motamed Soudabe,
Nikooyeh Bahareh,
Kashanian Maryam,
Hollis Bruce W.,
Neyestani Tirang R.
Publication year - 2019
Publication title -
maternal and child nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.181
H-Index - 63
eISSN - 1740-8709
pISSN - 1740-8695
DOI - 10.1111/mcn.12867
Subject(s) - medicine , vitamin d and neurology , cord blood , gestational age , birth weight , apgar score , gestation , pregnancy , vitamin , gastroenterology , obstetrics , genetics , biology
Hypovitaminosis D during pregnancy is suggested to have a link with complications in both mother and infant. We aimed to evaluate the efficacy of two doses of vitamin D3 supplementation during pregnancy on maternal and cord blood vitamin D status, inflammatory biomarkers, and maternal and neonatal outcomes. A total of 84 pregnant women (gestational age of <12 weeks) were randomly allocated to one of two groups: (a) 1,000‐IU/d vitamin D and (b) 2,000 IU/d. Biochemical assessments (25‐hydroxycalciferol (25(OH)D), hs‐CRP, and cell‐culture supernatant concentrations of IL‐1β, IL‐6, and TNF‐α) of mothers were performed at the beginning and 34 weeks of gestation. Assessments of infants at delivery comprised cord blood serum concentrations of 25(OH)D, hs‐CRP, IL‐1β, IL‐6, TNF‐α, birth sizes, and Apgar score. Circulating concentrations of 25(OH)D increased in both intervention groups with more increment in 2,000 IU/d than in 1,000 IU/d (46.7 ± 30.7 vs. 24.0 ± 21.07 nmol L −1 , P = .001). Concentrations of TNF‐α decreased significantly in group 2,000 (−913.1 ± 1261.3 ng L −1 , P = .01). The cord blood concentration of IL‐6 in group 2,000 IU/d, compared with 1,000 IU/d, was significantly lower (25.9 ± 32.0 vs. 4.6 ± 1.4 ng L −1 , P = .03). The birth sizes including weight, length, and head circumference of the infants of group 2,000 IU/d were significantly higher than the infants' of group 1,000 IU/d. Supplementation with 2,000‐IU/d vitamin D3 is more effective than 1,000 IU/d in pregnant women in terms of increasing circulating 25(OH)D, ameliorating pro‐inflammatory markers notably TNF‐α in mother and IL‐6 in cord blood, and improving neonatal outcomes including the birth sizes.