Assessing the viability of transplanted gut microbiota by sequential tagging with D-amino acid-based metabolic probes

Nat Commun. 2019 Mar 21;10(1):1317. doi: 10.1038/s41467-019-09267-x.

Abstract

Currently, there are more than 200 fecal microbiota transplantation (FMT) clinical trials worldwide. However, our knowledge of this microbial therapy is still limited. Here we develop a strategy using sequential tagging with D-amino acid-based metabolic probes (STAMP) for assessing the viabilities of transplanted microbiotas. A fluorescent D-amino acid (FDAA) is first administered to donor mice to metabolically label the gut microbiotas in vivo. The labeled microbiotas are transplanted to recipient mice, which receive a second FDAA with a different color. The surviving transplants should incorporate both FDAAs and can be readily distinguished by presenting two colors simultaneously. Isolation of surviving bacteria and 16S rDNA sequencing identify several enriched genera, suggesting the importance of specific bacteria in FMT. In addition, using STAMP, we evaluate the effects on transplant survival of pre-treating recipients using different antibiotics. We propose STAMP as a versatile tool for deciphering the complex biology of FMT, and potentially improving its treatment efficacy.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acids / administration & dosage*
  • Amino Acids / chemistry
  • Animals
  • Anti-Bacterial Agents / pharmacology
  • Fecal Microbiota Transplantation / methods*
  • Feces / microbiology
  • Fluorescent Dyes / chemistry
  • Gastrointestinal Microbiome / drug effects*
  • Gastrointestinal Microbiome / genetics
  • Gastrointestinal Tract / microbiology*
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Microbial Viability / drug effects
  • RNA, Ribosomal, 16S / genetics*
  • Staining and Labeling / methods*
  • Stereoisomerism

Substances

  • Amino Acids
  • Anti-Bacterial Agents
  • Fluorescent Dyes
  • RNA, Ribosomal, 16S