Relationship between bone mineral density, leptin and insulin concentration in Brazilian obese adolescents.

Despite the epidemic of adolescent obesity, the effect of obesity and hormones on bone mineral accrual during growth is poorly understood. Studies using dual-energy X-ray to examine the effect of obesity on bone mass in children and adolescents have yielded conflicting results. The aim of this study was to explore the combined and independent contributions of body mass index, body composition, leptin, insulin, glucose levels and Homeostasis Model Assessment Insulin Resistance (HOMA-IR) to bone mineral density (BMD) and bone mineral content in a group of Brazilian obese adolescents.

Platelet and leptin in obese adolescents.

Objective: To analyze the influence of obesity status on immune cell count and concentration of the hormones cortisol and leptin, in order to establish a relationship among the variables analyzed.

Methods: We recruited 27 obese [body mass index (BMI) > or = 95th percentile] and 21 non-obese (BMI < or = 75th percentile) adolescent boys and girls, aged 15-19 years at the post-pubertal stage. BMI was calculated as body weight divided by height squared, and body composition was estimated by plethysmography in the Bod Pod system.

Hormonal alteration in obese adolescents with eating disorder: effects of multidisciplinary therapy.

Background/aims: Ghrelin and leptin play important roles in the physiopathology of eating disorders, starting generally in infancy and adolescence. The aim of this study was to evaluate the effects of multidisciplinary short-term therapy on ghrelin and leptin concentrations, bulimia nervosa symptoms, binge eating disorder symptoms, body composition, and visceral and subcutaneous fat in obese adolescents.

Methods: Twenty obese adolescents with simple obesity (BMI >95th percentile, 36.

Short- and long-term beneficial effects of a multidisciplinary therapy for the control of metabolic syndrome in obese adolescents.

Visceral fat is highly correlated with metabolic syndrome in obese adolescents. The aims of this study were to determine the prevalence of metabolic syndrome and to assess the effect of a long-term (1 year) intervention with multidisciplinary therapy in predicting metabolic syndrome among obese adolescents, as well as to compare short- with long-term therapy. Eighty-three postpuberty obese adolescents were recruited, including 37 boys (body mass index [BMI], 36.