Document Detail

Polyunsaturated fatty acid levels in blood during pregnancy, at birth and at 7 years: their associations with two common FADS2 polymorphisms.
MedLine Citation:
PMID:  22194195     Owner:  NLM     Status:  MEDLINE    
Minor alleles of polymorphisms in the fatty acid desaturase (FADS) gene cluster have been associated with reduced desaturation of the precursor polyunsaturated fatty acids (FAs) in small studies. The effects of these polymorphisms during progressive developmental stages have not previously been reported. Data from blood samples for 4342 pregnant women, 3343 umbilical cords reflecting the newborn's blood supply and 5240 children aged 7 years were analysed to investigate the associations of polyunsaturated FAs with rs1535 and rs174575-two polymorphisms in the FADS2 gene. Strong positive associations were observed between the minor G allele for these two markers, especially rs1535, and the substrates linoleic (18:2n-6) and α-linolenic (18:3n-3) acid. Negative associations were observed for the more highly unsaturated FAs such as arachidonic acid (20:4n-6), timnodonic acid (EPA, 20:5n-3) and cervonic acid (DHA, 22:6n-3). Bivariable genetic associations using the mother and child genotypes suggested that the newborn metabolism had a greater capacity to synthesize the more highly unsaturated omega-6 FAs than the more highly unsaturated omega-3 FAs. Nevertheless, despite the immaturity of the neonate, there was evidence that synthesis of DHA was occurring. However, by 7 years, no associations were observed with the maternal genotype. This suggested that the children's FA levels were related only to their own metabolism with no apparent lasting influences of the in utero environment.
Colin D Steer; Joseph R Hibbeln; Jean Golding; George Davey Smith
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2011-12-21
Journal Detail:
Title:  Human molecular genetics     Volume:  21     ISSN:  1460-2083     ISO Abbreviation:  Hum. Mol. Genet.     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-03-12     Completed Date:  2012-11-19     Revised Date:  2014-02-24    
Medline Journal Info:
Nlm Unique ID:  9208958     Medline TA:  Hum Mol Genet     Country:  England    
Other Details:
Languages:  eng     Pagination:  1504-12     Citation Subset:  IM    
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MeSH Terms
Fatty Acid Desaturases / genetics*
Fatty Acids, Unsaturated / blood*
Infant, Newborn
Polymorphism, Single Nucleotide*
Sex Factors
Grant Support
092731//Wellcome Trust; G0600705//Medical Research Council; G9815508//Medical Research Council
Reg. No./Substance:
0/Fatty Acids, Unsaturated; EC 1.14.19.-/Fatty Acid Desaturases; EC protein, human

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