title: Serum alpha-tocopherol and selenium in Belgian infants and children.
abstract: Previous studies showed low selenium (Se) concentrations in Belgian children. Serum alpha-tocopherol, retinol, total cholesterol, high-density lipoprotein and low-density lipoprotein cholesterol, selenium (Se), and thiobarbituric acid-reactive substances were examined. In order to obtain further information on the Se status in Belgian children, Se, alpha-tocopherol, retinol, and lipid concentrations were examined and signs of peroxidative lipid damage were evaluated in a subgroup. The study was performed in 524 children (0-14 yr old) during vaccination campaigns. Three age groups were analyzed: 0-1, 1-4, and 4-14 yr. In 87 of them, where sufficient amounts of serum were available, analysis of thiobarbituric acid-reactive substances was done. Infants have high serum alpha-tocopherol concentrations: (23.2 micromol/L [median and interquartile range: 18.6-30.2]) and low Se concentrations (0.37 mol/L [0.27-0.47]). Se concentrations rise significantly during the first 4 yr (p < 0.0001) (Mann-Whitney U-test, tied p-values): 0.70 micromol/L (0.59-0.82); in the 4-14 yr olds, it was 0.75 micromol/L (0.67-0.86). These values remain low compared to results coming from other parts of the world. Alpha-tocopherol concentrations decrease significantly after infancy (p < 0.0001). The ratio alpha-tocopherol/total cholesterol is higher in infants. This is induced by the high vitamin E content of infant formulas. Signs of serum lipid peroxidation could not be detected by analysis of serum malondialdehyde concentrations. High alpha-tocopherol concentrations, as those observed in infant serum lipids, could be one of the protective mechanisms from the peroxidative lipid damages, sometimes observed in a low-Se status.
authors.affiliation: Department of Pediatrics, AZ St-Jan, Brugge, Belgium.
authors.forename: S
authors.initials: S
authors.lastname: Van Biervliet
authors.forename: J P
authors.initials: JP
authors.lastname: Van Biervliet
authors.forename: D
authors.initials: D
authors.lastname: Bernard
authors.forename: M
authors.initials: M
authors.lastname: Matthys
authors.forename: R
authors.initials: R
authors.lastname: Vercaemst
authors.forename: V
authors.initials: V
authors.lastname: Blaton
mesh_terms: D000293:Adolescent; D000367:Age Factors; D001530:Belgium; D002624:Chemistry, Clinical / Q000379:methods; D002648:Child; D002675:Child, Preschool; D002784:Cholesterol / Q000097:blood; D008076:Cholesterol, HDL / Q000097:blood; D008078:Cholesterol, LDL / Q000097:blood; D002851:Chromatography, High Pressure Liquid; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D012643:Selenium / Q000097:blood*; D014810:Vitamin E / Q000097:blood*
chemical_list: D008076:Cholesterol, HDL; D008078:Cholesterol, LDL; D014810:Vitamin E; D002784:Cholesterol; D012643:Selenium