RT Journal Article T1 Early-life fecal microbiome and metabolome dynamics in response to an intervention with infant formula containing specific prebiotics and postbiotics. A1 Rodriguez-Herrera, Alfonso A1 Tims, Sebastian A1 Polman, Jan A1 Porcel Rubio, Rocío A1 Muñoz Hoyos, Antonio A1 Agosti, Massimo A1 Lista, Gianluca A1 Corvaglia, Luigi T A1 Knol, Jan A1 Roeselers, Guus A1 Perez Navero, Juan L K1 early life K1 gut microbiota K1 infant formula K1 metabolomics AB This study examined fecal metabolome dynamics to gain greater functional insights into the interactions between nutrition and the activity of the developing gut microbiota in healthy term-born infants. The fecal samples used here originate from a randomized, controlled, double-blind clinical study that assessed the efficacy of infant formula with prebiotics and postbiotics (experimental arm) compared with a standard infant formula (control arm). A group of exclusively breast-fed term infants was used as a reference arm. First, conventional targeted physiological and microbial measurements were performed, which showed differences in fecal Bifidobacterium levels and corresponding activity (e.g., lactate levels). Next, the overall fecal microbiota composition was determined by 16S rRNA gene amplicon sequencing. The microbiota composition profiles showed several bacterial groups in the experimental arm to be significantly different from the control arm and mostly closer to the levels observed in the reference arm. Finally, we applied an untargeted UPLC-MS/MS approach to examine changes in the fecal metabolome. Fecal metabolome profiles showed the most distinct separation, up to 404 significantly different metabolites, between the study arms. Our data reveal that infant formula with specific prebiotics and postbiotics may trigger responses in the intestinal microbiota composition that brings the ensuing fecal metabolite profile of formula-fed infants closer toward those observed in breast-fed infants. Furthermore, our results demonstrate a clear need for establishing an infant gut metabolome reference database to translate these metabolite profile dynamics into functional and physiologically relevant responses.NEW & NOTEWORTHY Untargeted metabolomics techniques can provide a "snapshot" of an ecosystem in response to environmental stimuli, such as nutritional interventions. Our analyses of fecal samples from infants demonstrate the potential of phenotyping by metabolomics while deciphering the complex interactions of early-life nutrition and gut microbiome development. PB American Physiological Society YR 2022 FD 2022-03-28 LK http://hdl.handle.net/10668/20171 UL http://hdl.handle.net/10668/20171 LA en NO Rodriguez-Herrera A, Tims S, Polman J, Porcel Rubio R, Muñoz Hoyos A, Agosti M, et al. arly-life fecal microbiome and metabolome dynamics in response to an intervention with infant formula containing specific prebiotics and postbiotics. Am J Physiol Gastrointest Liver Physiol. 2022 Jun 1;322(6):G571-G582. DS RISalud RD Apr 9, 2025