Excel · study · 2026
CX3CL1 (fractalkine)-CX3CR1 Interface Drives CD8⁺ T Cell-Induced Neurodegeneration in Human Brain Organoids
Listed in NCBI GEO
Immune-neuron interactions play a critical role in neuroinflammatory and neurodegenerative diseases, such as Alzheimer’s disease (AD), but how CD8⁺ T cells contribute to brain pathology remains poorly understood.
Description
Amyloid-β (Aβ), a hallmark of AD, is known to trigger neuronal stress and inflammation. Here, we established a human cortical organoid (hCO) model to investigate CD8⁺ T cell responses to Aβ-induced neurodegenerative stress.
Aβ exposure increased neuronal expression of CX3CL1 (fractalkine), which engages its receptor CX3CR1 on CD8⁺ T cells. Transwell migration assays showed enhanced recruitment of CX3CR1⁺ CD8⁺ T cells toward Aβ-treated hCOs. In parallel, Aβ upregulated IL-15 expression, a cytokine that supports CD8⁺ T cell activation.
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The infiltration of CD8⁺ T cells led to neuronal injury, marked by MAP2 loss and cleaved Caspase-3 activation, accompanied by an increase in gene signatures for cell death and inflammation. Exposure to the conditioned medium of activated CX3CR1high CD8⁺ T cell recapitulated this damage, and the neutralization of CD8+ T cell cytokines and cytotoxic molecules rescued the phenotype. These findings identify the CX3CL1-CX3CR1 axis and CD8⁺ T cell effector programs as drivers of neurotoxicity and establish brain organoids as a platform to study immune-driven neurodegeneration.
Links
Get the data
- GEO FTP directory ftp.ncbi.nlm.nih.gov/geo/series/GSE318nnn/GSE318014 ↗
download · from NCBI GEO
Where it is published
- GEO accession page ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE318014 ↗
landing page · from NCBI GEO
Documentation and papers
- PRJNA1416322 ncbi.nlm.nih.gov/bioproject/PRJNA1416322 ↗
project · from NCBI GEO
Topics
- Stated by source
- Expression profiling by high throughput sequencing · Homo sapiens
- From keywords
- Life Sciences
- Inferred from text
- Disease 75%
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NCBI GEO | GSE318014 | 14 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NCBI GEO | connector:ncbi_geo@1.0.0 | |
| concepts[disease].local:disease:disease | enrichment · NCBI GEO | keyword-concept-rules@1.0.0 | title+description (75%) |
| concepts[field].local:field:life-sciences | mapping · NCBI GEO | connector:ncbi_geo@1.0.0 | |
| concepts[method].geo_series_type:expression-profiling-by-high-throughput-sequencing | source · NCBI GEO | connector:ncbi_geo@1.0.0 | /gdstype |
| concepts[organism].NCBITaxon:9606 | source · NCBI GEO | connector:ncbi_geo@1.0.0 | /taxon |
| description | source · NCBI GEO | connector:ncbi_geo@1.0.0 | /summary |
| publication_date | source · NCBI GEO | connector:ncbi_geo@1.0.0 | |
| title | source · NCBI GEO | connector:ncbi_geo@1.0.0 | /title |