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Related Experiment Video

Updated: Jul 25, 2025

A Gut-on-a-Chip Model to Study the Gut Microbiome-Nervous System Axis
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The microbiota-gut-brain axis in hippocampus-dependent learning and memory: current state and future challenges.

Eloise J Kuijer1, Laura Steenbergen2

  • 1Leiden University Medical Centre, Leiden, the Netherlands; Department of Life Sciences, University of Bath, United Kingdom.

Neuroscience and Biobehavioral Reviews
|June 28, 2023
PubMed
Summary

The gut microbiota influences the hippocampus, affecting learning and memory. A new approach is proposed to study these gut-brain axis mechanisms for potential human health applications.

Keywords:
DysbiosisGut microbiotaHPA-axisHippocampusInflammationLearningMemoryMetabolitesMicrobiota-gut-brain axisNeurogenesisPrebioticProbioticShort chain fatty acidVagus nerve

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Area of Science:

  • Neuroscience
  • Microbiology
  • Gut-Brain Axis Research

Background:

  • Emerging research highlights the bidirectional communication between gut microbiota and the brain.
  • The microbiota-gut-brain axis is primarily studied in stress-related conditions like depression and anxiety.
  • Gut microbiota's impact on hippocampal function, learning, and memory is suggested by rodent studies.

Purpose of the Study:

  • To review current knowledge on gut microbiota-hippocampus interactions in rodents.
  • To propose a unified approach for studying these mechanisms in health and disease.
  • To facilitate the translation of preclinical findings to human applications for memory enhancement.

Main Methods:

  • Review of four primary gut microbiota-hippocampus pathways in rodents: vagus nerve, HPA axis, neuroactive substance metabolism, and inflammation.
  • Proposal for an evaluative framework to test these pathways.
  • Assessment of gut microbiota composition's influence on hippocampal function.

Main Results:

  • Identified four key routes connecting gut microbiota and the hippocampus in rodents.
  • Highlighted the need for a standardized approach to bridge preclinical and clinical research.
  • Emphasized the potential of microbiota-based strategies for cognitive function.

Conclusions:

  • A structured approach is crucial for understanding microbiota-hippocampus interactions.
  • This framework can advance the application of microbiota-based interventions for human cognitive health.
  • Further research is needed to optimize microbiota strategies for memory (dys)function.