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Association of Changes in Oxidative and Proinflammatory States With Changes in Vascular Function After a Lifestyle Modification Trial Among Obese Children Publisher Pubmed



Kelishadi R5 ; Hashemi M2 ; Mohammadifard N3 ; Asgary S4 ; Khavarian N1
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Authors Affiliations
  1. 1. Preventive Pediatric Cardiology Department, Isfahan Cardiovascular Research Centre, Isfahan University of Medical Sciences
  2. 2. Isfahan School of Medicine, Isfahan University of Medical Sciences
  3. 3. Nutrition Department, Isfahan Cardiovascular Research Centre, Isfahan University of Medical Sciences
  4. 4. Basic Science Department, Isfahan Cardiovascular Research Centre, Isfahan University of Medical, Sciences
  5. 5. Preventive Pediatric Cardiology Department, Isfahan Cardiovascular Research Centre, Isfahan University of Medical Sciences, Isfahan, P.O. Box 81465-1148, Iran

Source: Clinical Chemistry Published:2008


Abstract

BACKGROUND: The association of changes in oxidative and proinflammatory states with vascular function after diet and exercise intervention among obese children has not been previously explored. METHODS: In this 6-week diet and exercise intervention study in 35 obese children, age 12 to 18 years, we evaluated the relationship between changes in anthropometric indices, measures of insulin resistance, C-reactive protein (CRP), oxidized LDL (ox-LDL), and oxidative stress markers with changes in carotid intima-media thickness (C-IMT) and flow mediated dilation (FMD) of the brachial artery. RESULTS: At the end of the study, body mass index (BMI), waist circumference, and percentage body fat were decreased (P <0.05), but participants remained overweight (BMI ≥ 95th percentile). Although FMD improved (P <0.05), the improvement in C-IMT did not reach statistical significance. The changes in BMI, waist circumference, fat mass, ox-LDL, malondialdehyde (MDA), CRP, insulin, and homeostasis model assessment for insulin resistance (HOMA-IR) had an inverse correlation with the changes in mean FMD after adjustment for age and sex, with the highest correlations documented for ox-LDL, CRP, and WC. The age-and sex-adjusted changes in ox-LDL, waist circumference, CRP, MDA, and body fat mass had the highest correlations with changes in C-IMT. CONCLUSIONS: Our findings suggest that a common inflammatory stress condition associated with childhood obesity, notably with abdominal fat deposition, may play a role in the development of the earliest stages of proatherosclerotic inflammatory processes and subsequent vascular dysfunction. These changes might be partially reversible by short-term diet and exercise intervention, even if patients do not reach ideal body weight. © 2007 American Association for Clinical Chemistry.
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