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Related Experiment Video

Updated: Nov 2, 2025

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Altered Gut Microbiota in a Fragile X Syndrome Mouse Model.

Francisco Altimiras1,2, José Antonio Garcia1, Ismael Palacios-García3,4

  • 1Faculty of Engineering, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile.

Frontiers in Neuroscience
|June 14, 2021
PubMed
Summary

The human gut microbiome in Fragile X syndrome (FXS) mouse models shows significant bacterial and metabolic pathway alterations. These findings suggest a link between the gut microbiome and FXS, potentially leading to new treatment avenues.

Keywords:
autism spectrum disordersbiomarkersdrug developmentdrug targetsfragile X syndromegut microbiotamouse modelsneuroinflammation

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Area of Science:

  • Microbiology
  • Neuroscience
  • Genetics

Background:

  • The human gut microbiome plays a role in various disorders.
  • Fragile X syndrome (FXS) is a leading genetic cause of intellectual disability and autism.
  • The gut microbiome's role in FXS is not well understood.

Purpose of the Study:

  • To investigate the gut microbiome composition and function in a mouse model of Fragile X syndrome.
  • To identify specific bacterial species and metabolic pathways altered in FXS.

Main Methods:

  • Utilized 16S ribosomal RNA gene sequencing for gut microbiome analysis.
  • Employed a Fragile X syndrome mouse model (fmr1 KO2).

Main Results:

  • Identified significant alterations in bacterial species, including Akkermansia, Sutterella, and Bacteroides.
  • Observed changes in metabolic pathways such as menaquinone degradation, catechol degradation, and nucleotide metabolism.
  • Noted overlap in altered pathways with those previously found in autism.

Conclusions:

  • The study reveals a potential association between the gut microbiome and Fragile X syndrome.
  • Findings open avenues for developing novel therapeutic strategies and non-invasive biomarkers for FXS.