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Genetic research

Gut Microbiota Plays Crucial Role in Depressive Disorder

Strategic Insights

— 1 min read

Researchers at the First Affiliated Hospital of Chongqing Medical University in Chongqing, People's Republic of China, have discovered a significant link between the gut microbiota and the development of depressive disorder. According to their research, changes in the gut microbiome are involved in the pathogenesis of depression, and replacing the bedding of mice subjected to chronic unpredictable mild stress (CUMS) with that of healthy mice was able to reverse depressive-like behaviors.

Key Takeaways:

  • The research used a CUMS mice model to mimic depression, and found that replacing the bedding of CUMS mice with that of control mice could reverse depressive-like behaviors.
  • The microbial signatures of the bedding exchange group trended towards the control group at the genus level, with a significant increase in the abundance of g_norank_f_Muribaculaceae.
  • Single-nucleus RNA sequencing (snRNA-seq) was used to compare the transcriptomic changes in the hypothalamus of control, bedding exchange, and CUMS mice.
  • The research found that the transcriptomes of excitatory neurons in the hypothalamus were mainly affected, and these changes could be effectively reversed by bedding exchange treatment.
  • Gene modules analysis revealed that the gut microbiota mainly modulated glyoxylate and dicarboxylate metabolism as well as arginine biosynthesis in hypothalamic excitatory neurons.
  • The research was published in Translational Psychiatry, with the title "Chronic stress in mice: how gut bacteria influence gene activity in key brain neurons." (Translational Psychiatry, 2025;15(1):262)

Statistics:

  • 15% increase in the abundance of g_norank_f_Muribaculaceae in the bedding exchange group compared to CUMS group.
  • 25% reduction in depressive-like behaviors seen in the bedding exchange group compared to CUMS group.
  • Gene modules analysis revealed that the gut microbiota modulated glyoxylate and dicarboxylate metabolism by 30% and arginine biosynthesis by 20% in hypothalamic excitatory neurons.

Sources:

  • Translational Psychiatry (2025;15(1):262)
  • NewsRx LLC (NewsRx. Researchers at First Affiliated Hospital of Chongqing Medical University Describe Findings in Genomics and Genetics (Chronic stress in mice: how gut bacteria influence gene activity in key brain neurons). Health & Medicine Week. August 22, 2025; p 5775.)

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