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Serum n-6 and n-9 Fatty Acids Correlate with Serum IGF-1 and Growth Up to Four Months of Age in Healthy Infants.

Journal article
Authors Emma Kjellberg
Josefine Roswall
Stefan Bergman
Birgitta Strandvik
Jovanna Dahlgren
Published in Journal of pediatric gastroenterology and nutrition
Volume 66
Issue 1
Pages 141-146
ISSN 1536-4801
Publication year 2018
Published at Institute of Medicine, Department of Public Health and Community Medicine
Institute of Clinical Sciences, Department of Pediatrics
Pages 141-146
Language en
Links dx.doi.org/10.1097/MPG.000000000000...
www.ncbi.nlm.nih.gov/entrez/query.f...
Subject categories Pediatrics

Abstract

To study the relationship between insulin-like growth factor 1 (IGF-1), serum phospholipid fatty acids and growth in healthy full-term newborns during infancy.Prospective observational study of a population-based Swedish cohort comprising 126 healthy, term infants investigating cord blood and serum at two days and four months of age for IGF-1 and phospholipid fatty acid profile and breast milk for fatty acids at two days and four months, compared to anthropometric measurements (SDS).At all time-points arachidonic acid (AA) was negatively associated with IGF-1. IGF-1 had positive associations with Linoleic acid (LA) at two days and four months and Mead acid (MA) showed positive associations in cord blood. Multiple regression analyses adjusted for maternal factors (BMI, weight gain, smoking, education), gender, birth weight and feeding modality confirmed a negative association for the ratio AA/LA to IGF-1. MA in cord blood correlated to birth size. Changes in the ratios of n-6/n-3 and AA/docosahexaenoic acid from day two to four months together with infants' weight and feeding modality determined 55% of the variability of delta-IGF-1. Breastfed infants at four months had lower IGF-1 correlating with lower LA and higher AA concentrations, which in girls correlated with lower weight gain from birth to four months of age.Our data showed interaction of n-6 fatty acids with IGF-1 during the first four months of life, and an association between MA and birth size when adjusted for confounding factors. Further follow-up might indicate if these correlations are associated with later body composition.

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