Exercise facilitates post-stroke recovery through mitigation of neuronal hyperexcitability via interleukin-10 signaling

Nat Commun. 2025 Oct 8;16(1):8928. doi: 10.1038/s41467-025-62631-y.

Abstract

Physical exercise is an effective therapy for improving stroke recovery. However, the exact underlying molecular mechanisms of exercise-enhanced neuronal repair remain unclear. As exercise affects the immune system in healthy individuals, and the immune system in turn influences recovery after stroke, we hypothesized that immune mechanisms play a role in exercise-induced neurological recovery. Using a model of ischemic stroke in adult male mice, we here show that the presence of regulatory T cells (Treg) within the ischemic brain is a prerequisite for exercise-enhanced functional and structural recovery. Treg prevent excessive and sustained hyperexcitability of periinfarct neurons via IL-10 signaling. This reduced hyperexcitability precedes alterations in neuronal connectivity, which underlie functional improvement. Together, we delineate the interaction of exercise-therapy, the immune system and functional recovery after ischemic stroke. Our findings can have translational relevance for further development of immune-targeted therapies.

MeSH terms

  • Animals
  • Brain / pathology
  • Brain / physiopathology
  • Brain Ischemia / immunology
  • Brain Ischemia / physiopathology
  • Disease Models, Animal
  • Interleukin-10* / genetics
  • Interleukin-10* / metabolism
  • Ischemic Stroke* / immunology
  • Ischemic Stroke* / physiopathology
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Neurons* / metabolism
  • Neurons* / physiology
  • Physical Conditioning, Animal* / physiology
  • Recovery of Function
  • Signal Transduction
  • Stroke Rehabilitation* / methods
  • Stroke* / immunology
  • Stroke* / physiopathology
  • T-Lymphocytes, Regulatory / immunology
  • T-Lymphocytes, Regulatory / metabolism

Substances

  • Interleukin-10
  • IL10 protein, mouse