Microbiota-derived metabolite Indoles induced aryl hydrocarbon receptor activation and inhibited neuroinflammation in APP/PS1 mice

Aug 12, 2022Brain, behavior, and immunity

Gut bacteria chemicals called indoles may activate a brain receptor and reduce brain inflammation in Alzheimer's model mice

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Abstract

Microbiota-derived indoles may alleviate neuroinflammation in Alzheimer's disease models.

  • Indoles derived from gut microbiota can prevent the accumulation of amyloid-beta and hyperphosphorylation of Tau, which are key features in Alzheimer's disease.
  • Indoles enhance synaptic plasticity and improve cognitive and behavioral abilities in APP/PS1 mice.
  • An imbalance in indole-producing bacteria and a deficiency in tryptophan were observed in male APP/PS1 mice.
  • Indoles upregulated the production of the aryl hydrocarbon receptor and inhibited the NF-κB signaling pathway.
  • These compounds reduced the release of inflammatory cytokines, thereby alleviating the inflammatory response associated with Alzheimer's disease.

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