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Post term dietary-induced changes in DHA and AA status relate to gains in weight, length, and head circumference in
Monique van de Lagemaat1, Joost Rotteveel, Frits A J Muskiet
1Department of Pediatrics, VU University Medical Center, PO Box 7057, 1007 MB Amsterdam, The Netherlands. m.vandelagemaat@vumc.nl
Insights
Supplementing preterm infants with higher levels of docosahexaenoic (DHA) and arachidonic (AA) acids in postdischarge formula may enhance postnatal growth. This study found associations between erythrocyte DHA and AA levels and infant growth metrics.
Area of Science:
- Neonatal nutrition
- Pediatric growth and development
- Essential fatty acid metabolism
Background:
- Premature infants experience rapid postnatal declines in docosahexaenoic acid (DHA) and arachidonic acid (AA).
- Supplementation is crucial to mitigate these declines and support optimal development.
- Understanding the impact of different feeding strategies on fatty acid status and growth is essential.
Purpose of the Study:
- To investigate the associations between erythrocyte DHA and AA levels and growth in preterm infants.
- To compare the effects of different postdischarge feeding formulas on erythrocyte DHA and AA concentrations and subsequent growth.
Main Methods:
- A cohort of 139 preterm infants were fed human milk with fortifier or preterm formula until term.
- Postdischarge feeding included postdischarge formula (PDF), term formula (TF), or human milk (HM).
- Erythrocyte DHA and AA levels and growth parameters (weight, length, head circumference) were assessed at term and six months corrected age.
Main Results:
- Postdischarge formula (PDF) resulted in significantly higher erythrocyte DHA and AA levels compared to term formula (TF).
- No significant differences in growth were observed between the feeding groups from term to six months corrected age.
- Erythrocyte DHA positively correlated with weight and length gain but negatively with head circumference gain.
- Erythrocyte AA positively correlated with head circumference gain but negatively with weight and length gain.
Conclusions:
- Postdischarge formula (PDF) with higher DHA and AA concentrations than term formula (TF) may support better postnatal growth in preterm infants.
- Individual fatty acid associations with specific growth parameters suggest complex regulatory mechanisms.
- Further research is warranted to optimize DHA and AA supplementation strategies for preterm infants.
Abstract:
Preterms need supplementation with docosahexaenoic (DHA) and arachidonic (AA) acids to prevent steep postnatal declines. Associations between growth and erythrocyte (RBC) DHA and AA were studied in 139 preterms (51% male, gestational age 30.3±1.5 weeks, birth weight 1341±288g) fed human milk with breast milk fortifier or preterm formula until term, followed by postdischarge formula (PDF; n=52, 0.4% DHA, 0.4% AA), term formula (TF; n=41, 0.2% DHA, 0.2% AA), or human milk (HM; n=46). At six months, PDF resulted in higher RBC-DHA than TF and HM, while RBC-AA was higher than TF, but similar to HM. There were no between-group differences in growth between term and six months. RHC-DHA related positively with gain in weight and length and negatively with gain in head circumference. RBC-AA related positively with gain in head circumference and negatively with gain in weight and length. In conclusion, PDF with higher DHA and AA than TF may promote postnatal growth of preterms.
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