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Gut microbiota trajectory in pediatric patients undergoing hematopoietic SCT

E Biagi1, D Zama2, C Nastasi2

  • 1Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy.

Bone Marrow Transplantation
|April 21, 2015
PubMed

Insights

Hematopoietic stem cell transplantation (HSCT) disrupts gut microbiota, impacting acute graft-versus-host disease (aGvHD). Specific pre-transplant gut bacteria signatures may predict and potentially prevent aGvHD, aiding HSCT success.

Area of Science:

  • Microbiome research
  • Immunology
  • Hematopoietic stem cell transplantation

Background:

  • Acute graft-versus-host disease (aGvHD) is a major complication following hematopoietic stem cell transplantation (HSCT).
  • Understanding the gut microbiota's role in HSCT outcomes is crucial for improving patient care.

Purpose of the Study:

  • To longitudinally analyze gut microbiota changes (phylogenetic and functional) in pediatric HSCT patients.
  • To identify gut microbial signatures associated with the development of aGvHD.
  • To explore the potential of pre-HSCT microbiota modulation for better HSCT outcomes.

Main Methods:

  • Longitudinal study of pediatric patients undergoing HSCT.
  • Analysis of gut microbiota composition and short-chain fatty acid production.
  • Comparison of microbiota trajectories in patients with and without aGvHD, including pre-HSCT samples.

Main Results:

  • HSCT causes temporary disruption and subsequent recovery of the gut microbial ecosystem over 100 days.
  • Specific gut microbiota signatures before and after HSCT are linked to aGvHD onset.
  • Patients not developing aGvHD had higher pre-HSCT levels of propionate-producing Bacteroidetes.

Conclusions:

  • Gut microbiota structure and dynamics are critical factors for HSCT success.
  • Pre-HSCT gut microbiota composition, particularly the abundance of certain beneficial bacteria, may predict aGvHD.
  • Targeting the gut microbiota before HSCT offers a potential strategy to improve outcomes by promoting beneficial microbes with immunomodulatory functions.

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