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This study is a randomized placebo-controlled trial of oral weekly vitamin D3 (cholecalciferol) supplementation during the third trimester of pregnancy among women in Dhaka, Bangladesh. The overall goal of the study is to establish whether there is evidence that improving vitamin D status among pregnant women in Bangladesh will enhance the resistance of the infant offspring to infection.
The aims of the study are to assess the effect of supplementation on 1) maternal and infant vitamin D status (based on blood concentrations of a vitamin D metabolite) and, 2) markers of neonatal immune function.
The primary aims of this study are:
AIM #1 - To assess the effect of weekly antenatal administration of oral vitamin D3 (875 mcg/week = 35,000 IU week ≈ 5,000 IU per day) started in the third trimester (26-29 weeks gestation) on maternal vitamin D status and fetal-neonatal vitamin D status (cord blood), in comparison to a placebo control supplement.
AIM #2 - To demonstrate the maternal and fetal safety of weekly maternal antenatal (second and third-trimester) vitamin D supplementation at a dose of 875 mcg/week by monitoring maternal serum calcium, urinary calcium excretion, cord blood calcium concentration, and newborn clinical parameters.
AIM #3 - To measure the effect of antenatal vitamin D supplementation on selected biomarkers of fetal-neonatal immune function in cord blood: in vitro stimulated cord blood mononuclear cell (CBMC) LL-37 expression, gene expression related to inflammatory and immunoregulatory pathways, Th1/Th2 cytokine secretion, and bactericidal properties.
Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Prevention
Vitamin D3, Placebo control
International Centre for Diarrheal Disease Research, Bangladesh (ICDDR,B)
Not yet recruiting
Johns Hopkins Bloomberg School of Public Health
Published on BioPortfolio: 2014-07-23T21:09:02-0400
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A lipid cofactor that is required for normal blood clotting. Several forms of vitamin K have been identified: VITAMIN K 1 (phytomenadione) derived from plants, VITAMIN K 2 (menaquinone) from bacteria, and synthetic naphthoquinone provitamins, VITAMIN K 3 (menadione). Vitamin K 3 provitamins, after being alkylated in vivo, exhibit the antifibrinolytic activity of vitamin K. Green leafy vegetables, liver, cheese, butter, and egg yolk are good sources of vitamin K.
A nutritional condition produced by a deficiency of VITAMIN D in the diet, insufficient production of vitamin D in the skin, inadequate absorption of vitamin D from the diet, or abnormal conversion of vitamin D to its bioactive metabolites. It is manifested clinically as RICKETS in children and OSTEOMALACIA in adults. (From Cecil Textbook of Medicine, 19th ed, p1406)
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OXIDOREDUCTASES which mediate vitamin K metabolism by converting inactive vitamin K 2,3-epoxide to active vitamin K.
A family of phylloquinones that contains a ring of 2-methyl-1,4-naphthoquinone and an isoprenoid side chain. Members of this group of vitamin K 1 have only one double bond on the proximal isoprene unit. Rich sources of vitamin K 1 include green plants, algae, and photosynthetic bacteria. Vitamin K1 has antihemorrhagic and prothrombogenic activity.
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