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Vol. 61. Issue 1.
Pages 16-22 (1 July 2004)
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Vol. 61. Issue 1.
Pages 16-22 (1 July 2004)
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Peroxidación lipídica y concentración de vitamina E plasmática en niños hipercolesterolémicos de Medellín (Colombia)
Lipid peroxidation and plasma vitamin e concentration in hypercholesterolemic children from medellin (Colombia)
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C.M. Velásquez Rodrígueza,
Corresponding author
claver@pijaos.udea.edu.co

Correspondencia: Calle 75, n.° 65–87, bloque 44. Oficina 107. Ciudadela Robledo. Universidad de Antioquia. Medellín, Colombia
, R.M. Uscátegui Peñuelaa, L.C. Burgos Herrerab
a Centro de Investigación en Alimentación y Nutrición. Escuela de Nutrición y Dietética. Universidad de Antioquia
b Departamento de Bioquímica y Fisiología. Facultad de Medicina. Universidad de Antioquia. Colombia
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Antecedentes

Las alteraciones de los lípidos séricos en edades tempranas son factores de riesgo para desarrollar aterosclerosis; proceso en el que se cree que desempeña un papel importante la peroxidación lipídica junto con la hipercolesterolemia

Objetivo

Comparar entre dos grupos de niños, unos con niveles de lipoproteínas de baja densidad (LDL) igual o superior a 130mg/dl (hipercolesterolémicos) y otros con LDL inferior a 130mg/dl (control), las concentraciones plasmáticas de malondialdehído y vitamina E

Métodos

Estudio cruzado. Se incluyeron en el estudio escolares sanos de los colegios de la ciudad de Medellín seleccionados por personal de la Universidad de Antioquia basándose en una muestra probabilística

Sujetos

134 niños entre 6 y 9 años de edad, distribuidos en dos grupos: uno con 67 niños con hipercolesterolemia (LDL ≥ 130mg/dl) y otro control con 67 niños normocolesterolémicos (LDL < 130mg/dl)

Resultados

Los niños hipercolesterolémicos con una concentración sérica promedio de LDL de 147,7 ± 15,5mg/dl y un colesterol total de 212 ± 17mg/dl tenían mayores concentraciones plasmáticas de malondialdehído que el grupo control (0,18 ± 0,1 μM; 0,08 ± 0,06 μM, respectivamente; p < 0,0001). En el grupo de niños hipercolesterolémicos se encontró correlación negativa, entre la relación alfatocoferol/lípidos totales y la concentración de malondialdehído (r –0,337, p < 0,01)

Conclusión

La peroxidación lipídica fue mayor en niños hipercolesterolémicos y ésta aumentó a medida que disminuía la relación plasmática de alfatocoferol/lípidos totales (mg/g). La hipercolesterolemia y la peroxidación lipídica son factores de riesgo cardiovascular que coexisten y se instauran desde la edad escolar

Palabras clave:
Peroxidación lipídica
Alfatocoferol
LDL Hipercolesterolemia
Niños
Malondialdehído
Background

Serum lipid abnormalities in early childhood are risk factors for atherosclerosis. Lipid peroxidation might play an important role in this process, along with hypercholesterolemia

Objective

To compare plasma concentrations of malondialdehyde (MDA) and vitamin E in two groups of children: one group with low density lipoproteins (LDL) concentrations ≥ 130mg/dL and another group with LDL concentrations < 130mg/dL

Methods

Cross-sectional study

Healthy schoolchildren from the city of Medellin selected by probabilistic sampling performed by staff at the Universidad de Antioquia in Colombia

Sample

There were 134 subjects, aged 6 to 9 years old, divided into two groups: a group of 67 hypercholesterolemic children (LDL ≥ 130mg/dL) and a control group of 67 normocholesterolemic children (LDL < 130mg/dL)

Results

Hypercholesterolemic children with a mean serum LDL concentration of 147.7 ± 15.5mg/dL and a total cholesterol concentration of 212 ± 17mg/dL had higher MDA plasma concentrations than the control group (0.18 ± 0.1 ± μM; 0.08 ± 0.06 μM, p < 0,0001, respectively). A negative correlation was observed between -tocopherol/total lipids ratio and MDA values in children with hypercholesterolemia (r=–0.337 p < 0.01)

Conclusion

Lipid peroxidation was higher in hypercholesterolemic children than in the control group and was even higher when there was a deficit in the -tocopherol/total lipids ratio. Hypercholesterolemia and lipid peroxidation are co-existing risk factors that are established during school age

Key words:
Lipid peroxidation
α -tocopherol
LDL
Hypercholesterolemia
Children
Malondialdehyde
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