Microglia activation orchestrates CXCL10-mediated CD8+ T cell recruitment to promote aging-related white matter

Janos Groh1,2,3,4, Ruoqing Feng5,6, Xidi Yuan6,7,8

  • 1Institute of Neuronal Cell Biology, Technical University Munich, Munich, Germany. janos.groh@tum.de.

Nature Neuroscience
|May 22, 2025
PubMed

Insights

Aging causes harmful microglia activation, leading to T cell accumulation and white matter degeneration. Targeting the CXCL10-CXCR3 axis may protect brain function in aging neurodegeneration.

Area of Science:

  • Neuroscience
  • Immunology
  • Aging Research

Background:

  • Aging is a primary risk factor for neurodegeneration, impacting white matter structure and function.
  • Myelin, crucial for nerve function, is vulnerable to aging, triggering microglia activation in white matter.

Purpose of the Study:

  • To investigate microglial functions in aging-related white matter changes using mouse models.
  • To understand the role of glial-immune interactions in age-related neurodegeneration.

Main Methods:

  • Pharmacological and genetic approaches in mice.
  • Single-cell and spatial transcriptomics for glial heterogeneity analysis.
  • Investigation of the CXCL10-CXCR3 signaling pathway.

Main Results:

  • Maladaptive microglia activation promotes CD8+ T cell accumulation in aged white matter.
  • This T cell infiltration leads to myelinated axon degeneration and impaired brain function.
  • The CXCL10-CXCR3 axis is identified as critical for CD8+ T cell recruitment and retention.

Conclusions:

  • Myelin-related microglia dysfunction in aging drives detrimental adaptive immune responses.
  • Targeting the CXCL10-CXCR3 axis offers a potential therapeutic strategy for age-related white matter damage and neurodegeneration.