Genetic variation in FADS genes is associated with maternal long-chain PUFA status but not with cognitive development of infants in a high fish-eating observational study. (December 2015)

• Record Type: Journal Article
• Authors: Yeates, Alison J.; Love, Tanzy M.; Engström, Karin; Mulhern, Maria S.; McSorley, Emeir M.; Grzesik, Katherine; Alhamdow, Ayman; Wahlberg, Karin; Thurston, Sally W.; Davidson, Philip W.; van Wijngaarden, Edwin; Watson, Gene E.; Shamlaye, Conrad F.; Myers, G.J.; Strain, J.J.; Broberg, Karin
• Is Part Of: Prostaglandins, leukotrienes, and essential fatty acids. Volume 102/103(2015:Nov.)
• Page Start: 13
• Page End: 20
• Publication Date: 2015-12
• Subjects: AA Arachidonic acid -- ALA Alpha-linolenic acid -- BSID-II Bayley's Scales of Infant Development II -- Δ5D Δ5-desaturase -- Δ6D Δ6-desaturase -- LA Linoleic acid -- LC-PUFA Long-chain polyunsaturated fatty acids -- MDI Mental Developmental Index -- NC1 Nutrition Cohort 1 -- NC2 Nutrition Cohort 2 -- PDI Psychomotor Developmental Index -- SCDS Seychelles Child Development Study.; Δ-5 Desaturase (Δ5D) -- Δ-6 Desaturase (Δ6D) -- Maternal fish consumption -- Neurodevelopment -- Seychelles Child Development Study (SCDS); Lipids -- Periodicals; Unsaturated fatty acids -- Periodicals; Prostaglandins -- Periodicals; Leukotrienes -- Periodicals; Fatty Acids, Unsaturated -- Periodicals; Acides gras insaturés -- Périodiques; Prostaglandines -- Périodiques; Leucotriènes -- Périodiques; Lipides -- Périodiques; 612.01577
• DOI: 10.1016/j.plefa.2015.08.004
• Languages: English
• ISSNs: 0952-3278

Abstract

Abstract: Long-chain n-6 and n-3 PUFA (LC-PUFA), arachidonic acid (AA) (20:4n-6) and DHA (22:6n-3), are critical for optimal brain development. These fatty acids can be consumed directly from the diet, or synthesized endogenously from precursor PUFA by Δ-5 (encoded by FADS1 ) and Δ-6 desaturases (encoded by FADS2 ). The aim of this study was to determine the potential importance of maternal genetic variability in FADS1 and FADS2 genes to maternal LC-PUFA status and infant neurodevelopment in populations with high fish intakes. The Nutrition Cohorts 1 (NC1) and 2 (NC2) are longitudinal observational mother-child cohorts in the Republic of Seychelles. Maternal serum LC-PUFA was measured at 28 weeks gestation and genotyping for rs174537 ( FADS1 ), rs174561 ( FADS1 ), rs3834458 ( FADS1 - FADS2 ) and rs174575 ( FADS2 ) was performed in both cohorts. The children completed the Bayley Scales of Infant Development II (BSID-II) at 30 months in NC1 and at 20 months in NC2. Complete data were available for 221 and 1310 mothers from NC1 and NC2 respectively. With increasing number of rs3834458 minor alleles, maternal concentrations of AA were significantly decreased (NC1 p =0.004; NC2 p <0.001) and precursor:product ratios for linoleic acid (LA) (18:2n-6)-to-AA (NC1 p <0.001; NC2 p <0.001) and α-linolenic acid (ALA) (18:3n-3)-to-DHA were increased (NC2 p =0.028). There were no significant associations between maternal FADS genotype and BSID-II scores in either cohort. A trend for improved PDI was found among infants born to mothers with the minor rs3834458 allele.In these high fish-eating cohorts, genetic variability in FADS genes was associated with maternal AA status measured in serum and a subtle association of the FADS genotype was found with neurodevelopment.