Host/microbiota interactions-derived tryptophan metabolites modulate oxidative stress and inflammation via aryl hydrocarbon receptor signaling

Apr 3, 2022Free radical biology & medicine

Tryptophan metabolites from host and gut bacteria influence oxidative stress and inflammation through aryl hydrocarbon receptor signaling

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Abstract

Aryl hydrocarbon receptor (AhR) is associated with the regulation of redox homeostasis and immune responses.

  • AhR is a transcription factor that activates genes involved in various biological processes.
  • Research is shifting focus from xenobiotic-induced AhR activation to its response to physiological ligands.
  • Host/gut microbiota-derived tryptophan metabolites serve as significant endogenous ligands for AhR.
  • AhR signaling pathways can be categorized into canonical and non-canonical mechanisms.
  • Evidence suggests that AhR influences oxidative stress and inflammation in conditions like diabetes and kidney disease.
  • The review highlights both limitations and potential breakthroughs regarding endogenous AhR ligands derived from tryptophan catabolism.

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