Tryptophan Metabolism: A Link Between the Gut Microbiota and Brain

Dec 12, 2019Advances in nutrition (Bethesda, Md.)

How Gut Bacteria and Brain Are Connected Through Tryptophan Breakdown

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Abstract

Tryptophan is the sole precursor of serotonin, a key neurotransmitter involved in brain and gut functions.

  • Tryptophan contributes to the normal growth and health of both animals and humans.
  • It plays a modulatory role in the gut-brain axis, affecting both central neurotransmission and intestinal functions.
  • Tryptophan can be metabolized into kynurenine, tryptamine, and indole, influencing neuroendocrine and immune responses in the gut.
  • The gut microbiota significantly influences tryptophan metabolism, potentially affecting brain function.
  • Recent advances show how gut microbes modulate tryptophan metabolism and its impact on brain activities.
  • Modulating intestinal tryptophan metabolism may offer therapeutic options for addressing brain and gastrointestinal disorders.

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