Gender, age and plasma lipids differences associated with apolipoprotein E polymorphism in school children

Nelsy Loango, Martha Lucía Gallego, Beatriz Restrepo, Patricia Landázuri, .

Keywords: Polymorphism, genetic, apolipoproteins E, lipids, cholesterol, triglycerides, hormones, child, adolescent

Abstract

Introduction. Apolipoprotein E (apoE) polymorphism is a genetic determinant of total cholesterol and LDL-c levels. Several studies have examined the relationship between variations at the APO E and cardiovascular disease. It is important to determine this relationship in the Colombian population.
Objectives. The relationship of apoE polymorphisms was associated with lipid profile by age and sex.
Materials and methods. A sample of 500 children aged 8 to 18 years, were selected from school populations in Quindio Province, Colombia. ApoE genotypes were determined by polymerase chain reaction and restriction enzyme. Lipid profiles were obtained by commercial kits.
Results. The apoE allele frequencies were as follows: E3 - 91.6%, E2 - 5.3, and E4 - 3.1%. Genotypic frequencies were as follows: E3/E3 - 90.8%, E2/E3 - 5.6%, and E3/E4 - 3.2%. No homozygotes for E2/E2 and E4/E4 were recovered. Similar genotypic and allelic distribution was found for each gender. ApoE genotype and gender had a significant effect on total serum cholesterol (CT) and low density lipoprotein cholesterol (c-LDL). In boys these variables were related as follows: E4>E3>E2 (p<0.05); in girls the relationships were somewhat changed Polimorfismos apoE y lípidos en escolares
(E3>E4>E2). High density lipoprotein cholesterol (c-HDL) levels in boys were related as follows: E2>E4>E3; for girls, E4>E2>E3. In boys, for all variables, the protector effect was in E2; but in girls this allele was only a protector for CT and c-LDL, For triacylglycerol (TAG), very low density lipoprotein cholesterol (c-VLDL) and c-HDL, this the protector effect was associated with the E4 allele, (p<0.05).
Conclusion. The results suggested that modulation of apoE genotype on plasma lipids was influenced by gender and age, especially in girls older than 10 years.

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  • Nelsy Loango Grupo de Enfermedades Cardiovasculares y Metabólicas, Facultad de Ciencias de la Salud, Universidad del Quindío, Armenia, Colombia. Programa de Biología, Facultad de Ciencias Básicas y Tecnologías, Universidad del Quindío, Armenia, Colombia
  • Martha Lucía Gallego Grupo de Enfermedades Cardiovasculares y Metabólicas, Facultad de Ciencias de la Salud, Universidad del Quindío, Armenia, Colombia
  • Beatriz Restrepo Grupo de Enfermedades Cardiovasculares y Metabólicas, Facultad de Ciencias de la Salud, Universidad del Quindío, Armenia, Colombia
  • Patricia Landázuri Grupo de Enfermedades Cardiovasculares y Metabólicas, Facultad de Ciencias de la Salud, Universidad del Quindío, Armenia, Colombia

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How to Cite
1.
Loango N, Gallego ML, Restrepo B, Landázuri P. Gender, age and plasma lipids differences associated with apolipoprotein E polymorphism in school children. biomedica [Internet]. 2009 Sep. 1 [cited 2024 May 18];29(3):382-91. Available from: https://revistabiomedica.org/index.php/biomedica/article/view/10

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