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Related Concept Videos

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Serotonin, a crucial neurotransmitter synthesized by enterochromaffin cells, plays a cardinal role in regulating gastrointestinal (GI) motility. With over 90% of the body's total serotonin in the GI tract, its influence on digestive processes is profound. Serotonin is swiftly released upon various stimuli, such as food boluses or certain drugs, triggering intrinsic sensory neurons in the myenteric plexus and extrinsic vagal and spinal sensory neurons. This leads to the activation of the...
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Updated: Jun 17, 2025

Immunometabolic Circuits in Infection for Advancing Host Directed Therapies
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Host-microbe serotonin metabolism.

Emilia Nunzi1, Marilena Pariano1, Claudio Costantini1

  • 1Department of Medicine and Surgery, University of Perugia, Perugia, Italy.

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Serotonin, a key neurotransmitter, also regulates host-microbe interactions and tryptophan metabolism for homeostasis. Understanding these connections is vital for both physiology and disease.

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Area of Science:

  • Microbiology
  • Neuroscience
  • Physiology

Background:

  • Serotonin (5-hydroxytryptamine) is a crucial neurotransmitter with diverse physiological functions.
  • Recent research highlights serotonin's role in host-microbe interactions.
  • This interaction occurs at the tryptophan metabolic pathway, impacting homeostasis.

Purpose of the Study:

  • To review the multifaceted role of serotonin at the host-microbe interface.
  • To explore the interplay between host and microbial tryptophan degradation pathways.
  • To elucidate how these pathways influence serotonin's functions in health and disease.

Main Methods:

  • Literature review of existing studies on serotonin, host-microbe interactions, and tryptophan metabolism.
  • Analysis of current findings on the dual role of serotonin.
  • Discussion of the implications for understanding physiological and pathological conditions.

Main Results:

  • Serotonin exhibits a dual role at the host-microbe interface, influencing local and systemic homeostasis.
  • Host and microbial pathways of tryptophan degradation are interconnected.
  • These interconnections are key to understanding serotonin's versatility.

Conclusions:

  • Unraveling the complex interplay of tryptophan metabolism pathways is essential.
  • This understanding can help explain serotonin's diverse roles in physiology and pathology.
  • Targeting these pathways may offer therapeutic potential for various conditions.