Document Detail


Selenium in pediatric nutrition.
MedLine Citation:
PMID:  2000274     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Se is an essential nutrient that provides antioxidant protection in concert with vitamin E. Several selenoproteins have been identified, but only one, SeGSHpx, has a known function, that of neutralizing toxic hydroperoxides. Plasma Se concentration, being responsive to changes in Se intake, is the most practical and widely used measure of nutritional Se status. The plasma Se concentrations of the majority of healthy infants and children fall within the range of 50 to 150 micrograms/L. Although SeGSHpx activity measures the metabolically functional form of Se, the lack of a standardized analytical method has limited its usefulness as an index of nutritional Se status. Se deficiency was first observed in animals, but it is now recognized to occur in humans. Two human diseases associated with severe nutritional Se deficiency have been reported from China: a juvenile cardiomyopathy named Keshan disease and a chondrodystrophy named Kaschin-Beck disease. Long-term TPN, which provides negligible amounts of intrinsic Se, has been demonstrated in some cases to result in biochemical and clinical impairment. Although there are no consistent signs and symptoms characteristic of TPN-associated Se deficiency in addition to the low blood selenium levels, some patients will experience leg muscle pain and altered serum transaminase and creatine kinase activities. These manifestation of Se deficiency usually take years to develop. Recent information about the amount of dietary Se needed to maximize plasma SeGSHpx activity in adult men has allowed for better estimates of the Se requirement for humans. Recommended daily dietary allowances published recently by the National Academy of Sciences have been revised for infants and children in this paper by making appropriate adjustments for the protein requirements of these age-groups. These recommended intakes for Se can generally be met by consuming adequate amounts of cereals, meat, eggs, dairy products, human milk, and infant formula, which are good sources of highly available Se and are of low risk of providing excess amounts of Se. Suboptimal Se intakes by pregnant women may predispose their infants to low Se status at birth, which in turn may affect the infants ability to maintain adequate Se status during the first few months of life. In those situations where protein intake is restricted, such as in phenylketonuria and maple syrup urine disease, Se-supplemented formulas should be used. The most critical situation for Se supplementation is in pediatric patients receiving long-term TPN therapy.(ABSTRACT TRUNCATED AT 400 WORDS)
Authors:
R E Litov; G F Combs
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Pediatrics     Volume:  87     ISSN:  0031-4005     ISO Abbreviation:  Pediatrics     Publication Date:  1991 Mar 
Date Detail:
Created Date:  1991-04-05     Completed Date:  1991-04-05     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0376422     Medline TA:  Pediatrics     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  339-51     Citation Subset:  AIM; IM    
Affiliation:
Mead Johnson Research Center, Bristol-Myers Squibb Company, Evansville, Indiana 47721-0001.
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MeSH Terms
Descriptor/Qualifier:
Diet
Food Analysis
Humans
Infant
Infant Nutritional Physiological Phenomena*
Infant, Newborn
Milk, Human
Nutritional Requirements
Selenium* / adverse effects,  analysis,  blood,  deficiency,  metabolism
Chemical
Reg. No./Substance:
7782-49-2/Selenium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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