Associations of 25-hydroxyvitamin D2 and D3 with cardiovascular risk factors in childhood: cross-sectional findings from the Avon Longitudinal Study of Parents and Children

Williams, D.M., Fraser, A., Sayers, A., Fraser, W.D., Hingorani, A., Deanfield, J., Davey Smith, G., Sattar, N. and Lawlor, D.A. (2012) Associations of 25-hydroxyvitamin D2 and D3 with cardiovascular risk factors in childhood: cross-sectional findings from the Avon Longitudinal Study of Parents and Children. Journal of Clinical Endocrinology and Metabolism, 97(5), pp. 1563-1571. (doi:10.1210/jc.2011-2335)

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Abstract

Context: Studies in adults have reported associations of low circulating total 25-hydroxyvitamin D with increased cardiovascular disease and risk factors. Evidence of associations in children, however, is limited, and it is unknown whether associations with risk factors differ for each 25-hydroxyvitamin D analog [25-hydroxyvitamin D2 (25[OH]D2) and 25-hydroxyvitamin D2 (25[OH]D3)]

Objective: The objective of the study was to compare associations of 25(OH)D2 and 25(OH)D3 with cardiovascular risk factors in children.

Design/Setting: The design of the study was a cross-sectional study of 4274 children (mean age 9.9 yr) from the Avon Longitudinal Study of Parents and Children.

Main Outcomes: The main outcomes included blood pressure, lipids [triglycerides, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol (HDL-C)], apolipoproteins (Apo-A1 and Apo-B), adiponectin, leptin, C-reactive protein, and IL-6.

Results: In confounder-adjusted models, 25(OH)D2 was inversely associated with Apo-A1 (change per doubling of exposure: −0.74mg/dl; 95% confidence interval −0.14, −0.04) and triglycerides (relative percentage change per doubling of exposure: −1.64%; −3.27, 0.01) and positively associated with C-reactive protein (8.42%; 3.40, 13.58) and IL-6 (5.75%; 1.83, 9.25). 25(OH)D3 was positively associated with HDL-C (0.04 mmol/liter; 0.02, 0.06), Apo-A1 (1.96 mg/dl; 0.65, 3.24), and adiponectin (0.47 μg/ml; 0.15, 0.79). There was statistical evidence that associations of 25(OH)D2 and 25(OH)D3 with HDL-C, Apo-A1, and IL-6 differed from each other (all P values for differences ≤0.02).

Conclusions: Higher circulating 25(OH)D3 was associated with cardioprotective levels of HDL-C, Apo-A1, and adiponectin in children. Associations of 25(OH)D2 with cardiovascular risk factors were in mixed directions. It is necessary to see whether these associations are replicated in large prospective studies.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Davey Smith, Professor George and Sattar, Professor Naveed
Authors: Williams, D.M., Fraser, A., Sayers, A., Fraser, W.D., Hingorani, A., Deanfield, J., Davey Smith, G., Sattar, N., and Lawlor, D.A.
College/School:College of Medical Veterinary and Life Sciences > Institute of Cardiovascular and Medical Sciences
Journal Name:Journal of Clinical Endocrinology and Metabolism
ISSN:0021-972X
ISSN (Online):1945-7197
Published Online:16 February 2012

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