Gut microbiota regulates stress responsivity via the circadian system

Nov 6, 2024Cell metabolism

Gut bacteria influence stress responses through the body’s internal clock

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Abstract

Microbial depletion disrupts brain activity and hormone patterns, leading to hyper-activation of the stress response system.

  • The gut microbiota regulates the rhythm of the hypothalamic-pituitary-adrenal (HPA) axis.
  • Depleting gut microbes alters brain activity related to stress in the hippocampus and amygdala.
  • This alteration is linked to disrupted daily patterns of glucocorticoid secretion.
  • Microbial changes can lead to specific impairments in stress responses based on the time of day.
  • Transplanting gut microbes demonstrates that specific bacterial strains, like L. reuteri, may influence hormone release.

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