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Area of Science:

  • Neuroimmunology
  • Microbiome research
  • Peripheral nervous system regeneration

Background:

  • Interleukin-17 (IL-17) production, influenced by the gut microbiota, is known to affect the central nervous system (CNS) and animal behavior.
  • The specific role of IL-17 in the peripheral nervous system (PNS) remains largely unexplored.

Purpose of the Study:

  • To investigate the function of Th17 cells and IL-17 signaling in peripheral nerve regeneration following injury.

Main Methods:

  • Utilized mouse models to study the response of commensal-specific Th17 cells after tissue injury.
  • Analyzed the role of IL-17 signaling pathways in peripheral neurons during the regeneration process.

Main Results:

  • Demonstrated that commensal-specific Th17 cells are recruited to sites of peripheral nerve injury.
  • Showed that these Th17 cells support local nerve regeneration through IL-17 signaling.
  • Identified IL-17 signaling as a critical mediator acting directly on peripheral neurons to promote repair.

Conclusions:

  • Commensal-specific Th17 cells play a crucial role in supporting peripheral nerve regeneration post-injury.
  • IL-17 signaling on peripheral neurons is essential for orchestrating this regenerative response, highlighting a novel link between the microbiota and PNS repair.