Strain inheritance and neonatal gut microbiota development: A meta-analysis
JournalInternational journal of medical microbiology : IJMM
MetadataShow full item record
AbstractAs many inflammatory and metabolic disorders have been associated with structural deficits of the human gut microbiota, the principles and mechanisms that govern its initialization and development are of considerable scientific interest and clinical relevance. However, our current understanding of the developing gut microbiota dynamics remains incomplete. We carried out a large-scale, comprehensive meta-analysis of over 1900 available metagenomic shotgun samples from neonates, infants, adolescents, and their families, using our recently introduced SameStr program for strain-level microbiota profiling and the detection of microbial strain transfer and persistence. We found robust associations between fecal microbiota composition and age, as well as delivery mode, which was measurable for up to two years of life. C-section was associated with increased relative abundances of non-gut species and delayed transition from a predominantly oxygen-tolerant to intolerant microbial community. Unsupervised networks based on shared strain profiles generated family-specific clusters connecting infants, their siblings, parents and grandparents and, in one case, suggested strain transfer between neonates from the same hospital ward, but could also be used to identify potentially mislabeled metagenome samples. Vaginally delivered newborns shared more strains with their mothers than C-section infants, but strain sharing was reduced if mothers underwent antibiotic treatment. Shared strains persisted in infants throughout the first year of life and belonged to the same bacterial species as strains that were shared between adults and their parents. Irrespective of delivery type, older children shared strains with their mothers and fathers and, into adulthood, could be accurately distinguished from unrelated sample pairs. Prominent fecal commensal bacteria were both among frequently transferred (e.g. Bacteroides and Sutterella) and newly acquired taxa (e.g. Blautia, Faecalibacterium, and Ruminococcus). Our meta-analysis presents a more detailed and comprehensive picture of the highly dynamic neonatal and infant fecal microbiota development than previous studies and presents evidence for taxonomic and functional compositional differences early in life between infants born naturally or by C-section, which persist well into adolescence. © 2021 The Authors
Rights/TermsCopyright © 2021 The Authors. Published by Elsevier GmbH.. All rights reserved.
Identifier to cite or link to this itemhttp://hdl.handle.net/10713/14981
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