Influência do sobrepeso e da obesidade em adolescentes na geração de lipoproteínas de baixa densidade eletronegativa (LDL) / Influence of overweight and obesity in adolescents in generation of electronegative low density lpoproteins

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

Introduction: Some evidence suggests that the prevalence of overweight and obesity has significantly increased in the pediatric population. Obesity represents a chronic and inflammatory disease, where oxidative modification is associated. Many factors modulate the oxidative susceptibility of LDL and produces the LDL- and diet is considered very important in this process. Subnormal antioxidant levels may contribute to the increased risk of atherosclerosis in obese subjects. Objective: to evaluate the influence of overweight and obesity on eletronegative low density lipoprotein (LDL-) in adolescents. Methodology: The sample was composed for 150 adolescents, with 10 to 15 years old, both gender. They were evaluated by anthropometric profile and habitual food consumption. After 12 hour of fat, a blood sample was collected, and from the serum, was analyzed the serum lipids, LDL- and you respective antibodies, inflammatory profile (PCR and IL-6) and the alfa-tocopherol and retinol concentrations. Results: The serum lipids had a significant difference between Eutrophic and Obese group for of total- cholesterol (p=0,007), HDL-c (p=0,001) and LDL-c (p=0,033), but for VLDL-c and TG they were similar (p=0,126). On the content of LDL- in plasma, in Eutrophic group had lower values than Overweight (p=0,021) and Obeso groups (p=0015). For the concentrations of Auto-antibodies anti-LDL- there was no significant difference between groups. For the concentration of IL-6 the 3 groups had statistically similar behavior (p=0678). In contrary, the plasma concentration of CRP in Overweight and Obese groups was higher than Eutrophic group (p<0001). Judging from the antioxidants, the concentration of alfa-tocopherol in the Eutrophic group showed values greater than Overweight (p=0012) and Obese groups (p<0001), wich are similar to each other (p=0798). The assessment of habitual food consumption, through the FFQ, the Obese group presented consumption of energy, protein, carbohydrate, vitamins A, E and C and fiber above the group Eutrophic (p=0016, p=0045, p=0004, p=0028, p=0017, respectively). After adjusting for energy, only protein (p=0002) and retinol (p=0049) had different values between the groups. Conclusions: The present study shows that overweight and obese adolescents showed a metabolic and oxidative profile worse than eutrophic adolescents. Therefore, the monitoring of clinical and biochemical variables in adolescents, it is important for early diagnosis of obesity and related diseases.

ASSUNTO(S)

nutrition dislipidemias adolescents adolescentes dyslipidemia lipoproteina de baixa densidade eletronegativa electronegative lowdensity lipoprotein nutrição oxidação oxidation obesidade obesity

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