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Song, Se Jin; Wang, Jincheng; Martino, Cameron; Jiang, Lingjing; Thompson, Wesley K; Shenhav, Liat; McDonald, Daniel; Marotz, Clarisse; Harris, Paul R; Hernandez, Caroll D; Henderson, Nora; Ackley, Elizabeth; Nardella, Deanna; Gillihan, Charles; Montacuti, Valentina; Schweizer, William; Jay, Melanie; Combellick, Joan; Sun, Haipeng; Garcia-Mantrana, Izaskun; Gil Raga, Fernando; Collado, Maria Carmen; Rivera-Viñas, Juana I; Campos-Rivera, Maribel; Ruiz-Calderon, Jean F; Knight, Rob; Dominguez-Bello, Maria Gloria
Med, 08/2021, Volume: 2, Issue: 8Journal Article
Early microbiota perturbations are associated with disorders that involve immunological underpinnings. Cesarean section (CS)-born babies show altered microbiota development in relation to babies born vaginally. Here we present the first statistically powered longitudinal study to determine the effect of restoring exposure to maternal vaginal fluids after CS birth. Using 16S rRNA gene sequencing, we followed the microbial trajectories of multiple body sites in 177 babies over the first year of life; 98 were born vaginally, and 79 were born by CS, of whom 30 were swabbed with a maternal vaginal gauze right after birth. Compositional tensor factorization analysis confirmed that microbiota trajectories of exposed CS-born babies aligned more closely with that of vaginally born babies. Interestingly, the majority of amplicon sequence variants from maternal vaginal microbiomes on the day of birth were shared with other maternal sites, in contrast to non-pregnant women from the Human Microbiome Project (HMP) study. The results of this observational study prompt urgent randomized clinical trials to test whether microbial restoration reduces the increased disease risk associated with CS birth and the underlying mechanisms. It also provides evidence of the pluripotential nature of maternal vaginal fluids to provide pioneer bacterial colonizers for the newborn body sites. This is the first study showing long-term naturalization of the microbiota of CS-born infants by restoring microbial exposure at birth. C&D, Emch Fund, CIFAR, Chilean CONICYT and SOCHIPE, Norwegian Institute of Public Health, Emerald Foundation, NIH, National Institute of Justice, Janssen.
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