Reporter brief
Systematic review finds platelet factor 4 modulates cognitive, immune, and hematopoietic aging through multiple signaling pathways.
What happened
This systematic review examined evidence for platelet factor 4 (PF4) in age-related dysfunction across cognitive, immune, and hematopoietic systems. The authors report that PF4 engages CXCR3 and LDLR receptors to activate downstream signaling, with reported effects including reduced hippocampal neuroinflammation, enhanced synaptic plasticity, restored T-cell balance, and preserved hematopoietic stem cell function in aging. Clinical observational studies identified correlations between circulating PF4 levels and conditions including Alzheimer's disease, sarcopenia, stroke, and coronary artery disease.
Why it matters
Assessment pending; this report does not establish a change in evidence.
What it does NOT prove
- Limitations have not been recorded; consult the primary source.
Study design and sample
Systematic review; Animal.
Not recorded.
- Design
- Systematic review
- Sample
- —
- Journal
- Frontiers in Immunology
- Published
- Sep 2, 2026
Effect size
Not recorded.
Caveats
- Assessment: Pending.
- Only the source material recorded on this evidence page was assessed.
Conflicts and funding
Not recorded.
Previous evidence
See the Klotho timeline and recorded assessment for prior evidence.
Primary source
Cancel Death charts and briefs may be reproduced editorially with attribution to CancelDeath.com. This brief is generated from the primary recorded source facts and assessment. Its review status is shown below; verify quotations against the paper before publication.