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Vitamin D supplementation, the metabolic syndrome and oxidative stress in obese children
Journal article   Peer reviewed

Vitamin D supplementation, the metabolic syndrome and oxidative stress in obese children

Tal Grunwald, Shruti Fadia, Bruce Bernstein, Matthew Naliborski, Shufang Wu, Francesco De Luca and Francesco DeLuca
Journal of pediatric endocrinology & metabolism : JPEM, v 30(4), pp 383-388
01 Apr 2017
PMID: 27977406

Abstract

Adolescent Adult Child Child, Preschool Dietary Supplements Female Follow-Up Studies Humans Male Metabolic Syndrome - etiology Metabolic Syndrome - prevention & control Obesity - complications Oxidative Stress - drug effects Prognosis Retrospective Studies Risk Factors Vitamin D - administration & dosage Vitamin D Deficiency - etiology Vitamin D Deficiency - prevention & control Young Adult
Previous studies suggest that vitamin D may play a role in cardiovascular and metabolic health. Oxidative stress has also been implicated in the development of cardiovascular disease. Evidence suggests that vitamin D deficiency may contribute to the occurrence of oxidative stress. This study aimed to determine whether treatment and correction of vitamin D deficiency in obese children led to changes in their metabolic profile, independent of changes in adiposity. In addition, we aimed to determine whether vitamin D deficiency and oxidative stress are causally related in obese children. In the retrospective arm, chart review identified 32 obese children who experienced normalization of vitamin D deficiency or insufficiency with vitamin D supplementation. We then correlated laboratory and anthropometric data with vitamin D levels. In the prospective arm of the study, urinary 8-isoprostane and hydrogen peroxide were measured before and after correction of vitamin D deficiency/insufficiency and correlated to vitamin D levels in seven patients. In our predominantly Hispanic population of obese children in an urban setting, we demonstrated a cause-effect relationship between vitamin D deficiency and oxidative stress. In contrast, we found no association between vitamin D status, adiposity, and markers of insulin sensitivity, nor any effect of vitamin D treatment on the same parameters. These discordant findings suggest a differential effect of vitamin D on cardiovascular risk factors such as oxidative stress and insulin resistance. To confirm these findings, further prospective studies with larger sample size and longer follow-up are warranted.

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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Endocrinology & Metabolism
Pediatrics
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