Glucose-6-phosphatedehydrogenase is also increased in erythrocytes from adolescents with Down syndrome.

For some time it has been claimed that trisomic cells are more sensitive to oxidative stress since there is an imbalance in hydrogen peroxide metabolism due to an increase in superoxide dismutase (SOD) catalytic activity. We designed the present study to assess activity levels of antioxidant enzymes [superoxide dismutase (SOD), glutathione peroxidase (GPx), catalase (CAT) and glucose-6-phosphate-dehydrogenase (G6PDH)] in erythrocytes in 31 male adolescents with Down syndrome (mean age 16.3 +/- 1.1). An increase of 35.2%, 15.3% and 14.9% in the catalytic activity of SOD, GPx and G6PDH respectively was observed in male adolescents with Down syndrome compared to age-matched controls. For CAT, a slight increase of 6.0% was also found. It is concluded that our data are consistent with previous evidence of the existence of oxidative stress in individuals with Down syndrome as revealed by significantly enhanced activities of SOD and GPx. The most striking feature was that G6PDH, in contrast to CAT, presented a similar behaviour. Further studies are required to identify other antioxidant enzymes in red blood cells as well as in white blood cells in order to increase the range of potential bioindicators of oxidative stress.

[Anthropometrical measurements as predictor of serum lipid profile in adolescents with Down syndrome]. / Medidas antropométricas como predictores del comportamiento lipídico sénrico en adolescentes con síndrome de Down.

Current findings suggest that more attention needs to be given to the increase in body mass being achieved by disabled populations in general and individuals with mental retardation in particular, to minimize long-term negative health consequences. Given that physical activity programs have been reported as one of the most effective ways of improving the health of individuals with Down syndrome, it would be of interest facilitate different tools to contribute to their clinical follow-up. Consequently, this study was designed to assess the correlation between anthropometrical parameters and lipid profile in adolescents with Down syndrome. Anthropometric variables such as body mass index, waist circumference and waist-to-hip ratio as well as serum lipids (total cholesterol, high-density-lipoprotein cholesterol, total-cholesterol/high-density-lipoprotein cholesterol and triglycerides) were measured in 21 male adolescents (16.3 +/- 1.1 years) with Down syndrome. Anthropometric parameters presented a positive association with serum lipids except for high-density-lipoprotein cholesterol that was negative. It should be emphasized the strongest association of waist-to-hip ratio to total cholesterol/high-density-lipoprotein cholesterol ratio (r = 0.48; p < 0.05). It is concluded waist circumference and waist-to-hip ratio may be highly recommended in clinical practice as appropriate anthropometric predictors of lipid profile in adolescents with Down syndrome. Further studies are required to assess their behavior during physical activity programs as well as to determine more correlations in these individuals.

Medidas antropométricas como predictores del comportamiento lipídico sérico en adolescentes con síndrome de Down / Anthropometrical measurements as predictor of serum lipid profile in adolescents with Down syndrome

Current findings suggest that more attention needs to be given to the increase in body mass being achieved by disabled populations in general and individuals with mental retardation in particular, to minimize long-term negative health consequences. Given that physical activity programs have been reported as one of the most effective ways of improving the health of individuals with Down syndrome, it would be of interest facilitate different tools to contribute to their clinical follow-up. Consequently, this study was designed to assess the correlation between anthropometrical parameters and lipid profile in adolescents with Down syndrome. Anthropometric variables such as body mass index, waist circumference and waist-to-hip ratio as well as serum lipids (total cholesterol, high-density-lipoprotein cholesterol, total-choles-terol/high-density-lipoprotein cholesterol and triglycerides) were measured in 21 male adolescents (16.3 ± 1.1 years) with Down syndrome. Anthropometric parameters presented a positive association with serum lipids except for high-density-lipoprotein cholesterol that was negative. It should be emphasized the strongest association of waist-to-hip ratio to total cholesterol/high-density-lipoprotein cholesterol ratio (r = 0.48; p < 0.05). It is concluded waist circumference and waist-to-hip ratio may be highly recommended in clinical practice as appropriate anthropometric predictors of lipid profile in adolescents with Down syndrome. Further studies are required to assess their behavior during physical activity programs as well as to determine more correlations in these individuals.

Si la obesidad como epidemia está alcanzando cotas preocupantes en la población general, la situación es aún más alarmante entre poblaciones con retraso mental en general y síndrome de Down en particular. Afortunadamente, recientes estudios sugieren que los programas de actividad física parecen una buena estrategia para combatirla, especialmente a edades tempranas. Para facilitar el seguimiento clínico de los mismos, diseñamos este trabajo para determinar las correlaciones más significativas entre parámetros antropométricos (índice masa corporal; índice cintura cadera; perímetro cadera) y el perfil lipídico sérico (colesterol total; colesterol-HDL; ratio colesterol total/HDL; triglicéridos) de 21 jóvenes adolescentes (16.3 ± 1.1) con trisomía 21. El coeficiente de correlación de Pearson demostró que las variables antropométricas ensayadas mostraron una correlación positiva con los distintos parámetros lipidicos excepto para colesterol-HDL que fue negativa. En líneas generales el perímetro de la cintura mostró el mejor comportamiento, mientras el índice cintura cadera mostró la mayor fuerza de asociación con la ratio colesterol-total/colesterol-HDL (r = 0.48; p < 0.05). Futuros estudios en los que se confirme la utilidad de estos hallazgos durante la aplicación de programas de actividad física y en los que se evalúen nuevas asociaciones son necesarios para contribuir a un mejor seguimiento y manejo de estos pacientes.