Microbiome of the first stool and overweight at age 3 years: A prospective cohort study

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Abstract

Background: Several reports have revealed that the first-pass meconium hosts a diverse microbiome, but its clinical significance is not known. Objective: We designed a prospective population-based cohort study to evaluate whether the meconium microbiome predicts subsequent growth in children. Methods: The study comprised 212 consecutive newborns with a meconium sample and a follow-up sample at 1 year of age. Trained nurses measured the children for weight and length using standardized techniques. We used next-generation sequencing of bacterial 16S rRNA gene and machine-learning approach for the analysis. Results: The children with overweight at 3 years of age differed in their meconium microbiome from those with normal weight, having a higher proportion of Bacteroidetes phylum (29% vs 15%, P =.013). Using the machine-learning approach, the gut microbiome at birth predicted subsequent overweight with area under the curve 0.70 (SD 0.04). A lower proportion of Staphylococcus at birth was associated with greater length/height at 1 year (ß = −.68, P =.029) and 2 years of age (β = −.74, P =.030). Conclusions: The microbiome of the first-pass meconium predicted subsequent overweight at the age of 3 years. The association between the gut microbiome and overweight appears to start already during pregnancy and at birth.

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Korpela, K., Renko, M., Vänni, P., Paalanne, N., Salo, J., Tejesvi, M. V., … Tapiainen, T. (2020). Microbiome of the first stool and overweight at age 3 years: A prospective cohort study. Pediatric Obesity, 15(11). https://doi.org/10.1111/ijpo.12680

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