Higher Plasma Fractalkine Is Associated With Better 6-Month Outcome From Ischemic Stroke
Open accessAbstract
BACKGROUND AND PURPOSE: Fractalkine (CX3CL1) is a unique chemokine that is constitutively expressed on neurons where it serves as an adhesion molecule for lymphocytes and monocytes. CX3CL1 may also be cleaved from the surface of these cells and enter the circulation to act as a traditional chemokine. CX3CL1 could thus influence the inflammatory response after stroke. We hypothesized that patients with higher plasma CX3CL1 after stroke would have a more robust inflammatory response and experience worse outcome. METHODS: Plasma CX3CL1 concentrations were assessed in 85 patients who were part of a larger study evaluating immune responses after ischemic stroke; CX3CL1 values were available from Day 1 to Day 180 after stroke onset. CX3CL1 was correlated to measures of inflammation and its effect on outcome assessed. RESULTS: At 1 day after stroke, CX3CL1 was lower in patients with severe strokes. At 180 days after stroke, CX3CL1 concentrations were lower in patients with poor outcome. The association of CX3CL1 and outcome at 180 days was independent of initial stroke severity. Plasma CX3CL1 at 180 days was inversely associated with systemic markers of inflammation, including white blood cell counts and high-sensitivity C-reactive protein. CONCLUSIONS: In contrast to our original hypothesis, lower concentrations of CX3CL1 are associated with worse stroke outcome. In light of recent studies suggesting an immunomodulatory and neuroprotective role for CX3CL1 in a variety of neurodegenerative diseases, a therapeutic role for CX3CL1 in stroke recovery should be considered.
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Fractalkine upregulation reduces tau pathology and neurodegeneration in an animal model, and elevated plasma fractalkine levels were protective in a stroke population.
“upregulation of fractalkine, a chemokine that dampens the pro-inflammatory state of microglia and plays a role in adult neurogenesis, has been shown to reduce tau pathology and neurodegeneration in an animal model [57], and elevated plasma fractalkine levels were protective in a stroke population [58].”
From Evaluation of exploratory fluid biomarkers from a phase 1 senolytic trial in mild Alzheimer's disease (2025) · cites this paper as [58]
The Results (page not provided) report that plasma fractalkine was lower at 180 days in ischemic-stroke patients with poor outcomes, independently of initial stroke severity. This supports an association between higher levels and better outcomes, but the observational study does not establish that elevated fractalkine was protective. The animal-model claim is attached to a different citation [57]. (LLM, conf=0.86)
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- Authors
- Donohue, M. M., Cain, K., Zierath, D., Shibata, D., Tanzi, P. M., & Becker, K. J.
- Affiliations
- University of Washington (US)
- Venue
- Stroke
- Published
- 2012-09
- Volume
- 43
- Issue
- 9
- Pages
- 2300-2306
- ISSN
- 0039-2499 (ISSN-L)
- 1524-4628
- PMC
- PMC3429728
- OpenAlex
- W2100293635
- Cited by
- 53
- References
- 42
- Citations by year
- 2026: 4 · 2025: 1 · 2024: 3 · 2023: 4 · 2022: 1 · 2021: 7 · 2020: 2 · 2019: 4 · 2018: 4 · 2017: 3 · 2016: 5 · 2015: 6 · 2014: 6 · 2013: 3
- FWCI
- 2.42
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Stroke (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institute of Neurological Disorders and Stroke (R01NS049197)
- Topics
- Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
- Health Sciences › Medicine › Epidemiology › Acute Ischemic Stroke Management
- Health Sciences › Medicine › Oncology › Chemokine receptors and signaling
- Keywords
- fractalkine, ischemic stroke, plasma biomarkers, stroke outcome, systemic inflammation, C-reactive protein, white blood cell count, stroke severity, neuroinflammation, neuroprotection
- MeSH terms
- Aged, C-Reactive Protein, Cerebral Infarction, Brain Ischemia, Female, Humans, Leukocyte Count, Male, Middle Aged, Biomarkers, Treatment Outcome, Intercellular Adhesion Molecule-1, Vascular Cell Adhesion Molecule-1, Stroke, Glasgow Outcome Scale, Chemokine CX3CL1
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