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Gut microbiome-gut brain axis-depression: interconnection.

Ruhina Afroz Patel1, Archana N Panche1, Sanjay N Harke1

  • 1Institute of Biosciences and Technology, MGM University, Aurangabad, India.

The World Journal of Biological Psychiatry : the Official Journal of the World Federation of Societies of Biological Psychiatry
|December 23, 2024
PubMed
Summary
This summary is machine-generated.

The gut microbiome influences mental health via the gut-brain axis. Imbalances (dysbiosis) and altered microbial metabolites are linked to depression, with epigenetic mechanisms playing a key role.

Keywords:
Gut-brain axisMicrobial metabolitesdepressiondysbiosisepigeneticsgut microbiomeneurotransmitterssignalling pathways

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Area of Science:

  • Microbiology
  • Neuroscience
  • Psychiatry

Background:

  • The gut microbiome plays a critical role in maintaining physiological balance and influences health through the gut-brain axis.
  • Dysbiosis, an imbalance in gut microbial composition, disrupts this axis and is associated with worsened depressive symptoms.
  • Factors such as diet, antibiotic use, and lifestyle choices can contribute to gut microbiome dysbiosis.

Purpose of the Study:

  • To review the intricate relationship between the gut microbiome, microbial metabolites, dysbiosis, and depression.
  • To explore the mechanisms through which the gut microbiome influences mental health via the gut-brain axis.
  • To highlight the potential of microbiome-targeted therapies, including psychobiotics, for novel depression treatments.

Main Methods:

  • Literature review examining the connection between microbial metabolites, dysbiosis, and depression.
  • Analysis of how gut microbiome alterations impact the gut-brain axis, including immune, neurotransmitter, hormonal, and epigenetic processes.
  • Exploration of epigenetic mechanisms such as DNA methylation and histone modifications in the context of gut microbiota and mental health.

Main Results:

  • Imbalances in the gut microbiome (dysbiosis) disrupt the gut-brain axis, contributing to depression through inflammation and altered neurotransmitter regulation.
  • Microbial metabolites, including short-chain fatty acids and neurotransmitters, are vital for gut-brain communication, and their altered production is linked to depression.
  • Epigenetic modifications influenced by the gut microbiota are crucial factors in the gut-brain axis's impact on mental health.

Conclusions:

  • The gut microbiome's influence on mental health, particularly depression, is mediated by the gut-brain axis, microbial metabolites, and epigenetic mechanisms.
  • Understanding these complex interactions opens avenues for innovative therapeutic strategies targeting the gut microbiome for depression.
  • Further research is essential to elucidate causative relationships and optimize microbiome-based interventions for mental health disorders.