Abstract

ACOSTA GARCIA, Edgar et al. Inflammatory markers in pubertal adolescents. Acta bioquím. clín. latinoam. [online]. 2015, vol.49, n.2, pp.201-207. ISSN 0325-2957.

Obesity coexists with a chronic inflammatory state of low intensity. In adipose tissue (AT), inflammatory factors are produced by adipocytes and by inflammatory cells associated with the AT, such as macrophages. The objective of this work was to evaluate serum concentrations (Sc) of inflammatory markers IL-6, TNF-á and CRP, and their differences by anthropometric nutritional status and the presence or absence of insulin resistance (IR) in pubertal adolescents in Valencia, Venezuela. The study was descriptive, correlational, and cross country. A total of 80 adolescents between 12 and 15 years of age (50% male) took part. Nutritional status, waist circumference (WC) and stage of sexual maturation were evaluated. Sc glucose and insulin were measured and HOMA-IR index was calculated. Serum levels (Sl) hsCRP, TNF-á and IL-6 were measured. Associations between variables were assessed using the correlational tests of Pearson and Spearman, mean comparisons with Student's t, Mann-Whitney, Kruskal-Wallis and ANOVA. The body mass index (BMI), the Sc glucose, insulin, hsCRP, TNF-á, IL-6 and HOMA-IR index did not differ by sex. The Sc hsCRP correlated only with BMI and WC (p<0.05) and IL-6 did with insulin and HOMA-IR index (p<0.05), whereas TNF-á did not correlate with variables and anthropometric indicators or IR indicators Sc hsCRP were higher in overweight adolescents (p=0.025), while IL-6 IR subjects outperformed those who did not have IR (p=0.011). Adolescents with overweight and IR (n=25) had Sn of IL-6 higher than those exhibited by adolescents with overweight but without IR (n=25) and those who were normal weight without IR (control group, n=30) (p=0.037). Sc hsCRP and TNF-á showed no significant differences among the three groups studied. Overweight and IR in adolescents is associated with Sl of IL-6 elevations, which reveals an inflammatory condition that is not present in normal weight adolescents without IR.

Keywords : Overweight; Insulin resistance; Ultrasensitive CRP; Interleukin 6; Tumor necrosis factor alpha.

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