Gut Microbes (Dec 2024)

Fecal transplant from vaginally seeded infants decreases intraabdominal adiposity in mice

  • Sivaranjani Namasivayam,
  • Curtis Tilves,
  • Hua Ding,
  • Shaoguang Wu,
  • Jada C Domingue,
  • Camilo Ruiz-Bedoya,
  • Ankit Shah,
  • Eric Bohrnsen,
  • Benjamin Schwarz,
  • Mickayla Bacorn,
  • Qing Chen,
  • Shira Levy,
  • Maria Gloria Dominguez Bello,
  • Sanjay K Jain,
  • Cynthia L Sears,
  • Noel T Mueller,
  • Suchitra K Hourigan

DOI
https://doi.org/10.1080/19490976.2024.2353394
Journal volume & issue
Vol. 16, no. 1

Abstract

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Exposing C-section infants to the maternal vaginal microbiome, coined “vaginal seeding”, partially restores microbial colonization. However, whether vaginal seeding decreases metabolic disease risk is unknown. Therefore, we assessed the effect of vaginal seeding of human infants on adiposity in a murine model. Germ-free mice were colonized with transitional stool from human infants who received vaginal seeding or control (placebo) seeding in a double-blind randomized trial. There was a reduction in intraabdominal adipose tissue (IAAT) volume in male mice that received stool from vaginally seeded infants compared to control infants. Higher levels of isoleucine and lower levels of nucleic acid metabolites were observed in controls and correlated with increased IAAT. This suggests that early changes in the gut microbiome and metabolome caused by vaginal seeding have a positive impact on metabolic health.

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