Document Detail


Impact of maternal dietary n-3 and n-6 fatty acids on milk medium chain fatty acids and the implications for neonatal liver metabolism.
MedLine Citation:
PMID:  21791621     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Levels of n-6, n-3 and medium chain fatty acids (MCFA) in milk are highly variable. Higher carbohydrate intakes are associated with increased mammary gland MCFA synthesis, but the role of unsaturated fatty acids for milk MCFA secretion is unclear. This study addressed whether n-6 and n-3 fatty acids, which are known to inhibit hepatic fatty acid synthesis, influence MCFA in rat and human milk, and the implications of varying MCFA, n-6 and n-3 fatty acids in rat milk for metabolic regulation in the neonatal liver. Rats were fed a low-fat diet or one of six higher fat diets, varying in 16:0, 18:1n-9, 18:2n-6, 18:3n-3 and long chain (LC) n-3 fatty acids. Higher maternal dietary 18:2n-6 or 18:3n-3 did not influence milk MCFA, but lower maternal plasma triglycerides, due to either a low fat or a high fat-high LC n-3 diet led to higher milk MCFA. MCFA levels were inversely associated with 18:1n-9, 18:2n-6 and 18:3n-3 in human milk, likely reflecting the association between dietary total fat and unsaturated fatty acids. High LC n-3 fatty acid in rat milk was associated with lower hepatic Pklr, Acly, Fasn and Scd1 and higher Hmgcs2 in the milk-fed rat neonate, with no effect of milk 18:1n-9, 18:2n-6 or MCFA. These studies show that the dietary fatty acid quality does not impact MCFA secretion in milk, but the fatty acid quality of milk, particularly the LC n-3 fatty acid is relevant to hepatic metabolic regulation in the milk-fed neonate.
Authors:
Elizabeth M Novak; Sheila M Innis
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-7-26
Journal Detail:
Title:  American journal of physiology. Endocrinology and metabolism     Volume:  -     ISSN:  1522-1555     ISO Abbreviation:  -     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-7-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100901226     Medline TA:  Am J Physiol Endocrinol Metab     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1University of British Columbia.
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