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Updated: Jul 31, 2026

Isolation of Cortical Microglia with Preserved Immunophenotype and Functionality From Murine Neonates
Published on: January 30, 2014
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.
Abstract:
Aging is the major risk factor for neurodegeneration and is associated with structural and functional alterations in white matter. Myelin is particularly vulnerable to aging, resulting in white matter-associated microglia activation. Here we used pharmacological and genetic approaches to investigate microglial functions related to aging-associated changes in myelinated axons of mice. Our results reveal that maladaptive microglia activation promotes the accumulation of harmful CD8+ T cells, leading to the degeneration of myelinated axons and subsequent impairment of brain function and behavior. We characterize glial heterogeneity and aging-related changes in white matter by single-cell and spatial transcriptomics and reveal elaborate glial-immune interactions. Mechanistically, we show that the CXCL10-CXCR3 axis is crucial for the recruitment and retention of CD8+ T cells in aged white matter, where they exert pathogenic effects. Our results indicate that myelin-related microglia dysfunction promotes adaptive immune reactions in aging and identify putative targets to mitigate their detrimental impact.
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.
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