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Related Experiment Video

Updated: Jun 12, 2025

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Tryptophan-producing bacteria to mitigate osteoporosis and intestinal dysfunction.

Bo Tian1, Heng Wang2, Yue Zhang2

  • 1Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, 215004, China.

Bioactive Materials
|June 9, 2025
PubMed
Summary
This summary is machine-generated.

Decreased gut tryptophan metabolites are linked to osteoporosis. Supplementing with tryptophan-producing bacteria repaired gut barriers and reduced bone loss in mice, offering a new therapy for osteoporosis.

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Area of Science:

  • Microbiology
  • Metabolomics
  • Bone Biology

Background:

  • The gut microbiota influences host health via metabolites.
  • Microbiota-derived metabolites are critical in the gut-organ axis.
  • Tryptophan derivatives are key microbial metabolites affecting host physiology.

Purpose of the Study:

  • To investigate the role of gut microbial metabolites in osteoporosis.
  • To explore the link between gut barrier function and bone health.
  • To evaluate a synthetic biology approach for osteoporosis treatment.

Main Methods:

  • Analysis of microbial metabolites in osteoporosis mouse models.
  • Induction of intestinal epithelial barrier dysfunction.
  • Supplementation with tryptophan-producing bacteria in mouse models.
  • Assessment of bone loss and inflammatory responses.

Main Results:

  • Osteoporosis mice exhibited significantly decreased tryptophan derivative levels.
  • Loss of tryptophan led to intestinal epithelial barrier dysfunction and bone inflammation.
  • Tryptophan-producing bacteria supplementation repaired gut barriers and mitigated bone loss in colitis and aged mice.

Conclusions:

  • Gut microbiota-derived tryptophan is crucial for maintaining intestinal barrier integrity and preventing osteoporosis.
  • Targeting gut tryptophan metabolism via bacterial supplementation is a promising therapeutic strategy for osteoporosis.
  • This approach shows potential for treating age-related osteoporosis in aging populations.