ArticleScientific reports2025
Umbilical cord serum metabolomics identifies amino acid alterations associated with impaired linear growth in small for gestational age infants.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Small-for-gestational-age (SGA) infants exhibit considerable heterogeneity in growth trajectories and metabolic outcomes; however, the metabolic basis underlying these variations remains incompletely understood. In this study, we analyzed umbilical cord serum samples from term infants (n = 52; SGA infants, n = 18; appropriate-for-gestational-age controls, n = 34) using gas chromatography-mass spectrometry to explore metabolic profiles. Multivariate and univariate analyses revealed that SGA infants exhibited significantly altered levels of metabolites involved in galactose metabolism, lactose degradation, and multiple pathways related to carbohydrate and energy metabolism. Further subgroup analysis demonstrated that SGA infants with both low weight and short birth length displayed distinct alterations in amino acid metabolism compared to SGA infants with preserved birth length, involving pathways related to glycine, serine, urea cycle, ammonia recycling, and glutathione metabolism. Among these, glutamine showed consistent changes across multiple analytic approaches. These findings suggest that metabolic subclassification based on birth-body proportionality may help identify distinct metabolic phenotypes in SGA infants. Such profiles may serve as early biomarkers of growth potential or future metabolic risk, highlighting the potential for targeted interventions in at-risk subgroups.
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