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Updated: Apr 17, 2026
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Flow Cytometry Analysis of Immune Cells Within Murine Aortas
Published on: July 1, 2011
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CD8+ T cells contribute to arterial aging in mice
David J Buckley1, Sogol Zahedi1, Alexandra Canizales1
1Department of Kinesiology, College of Nursing and Health Innovation, The University of Texas at Arlington, Arlington, TX, United States.
Journal of Immunology (Baltimore, Md. : 1950)
|April 15, 2026
Summary
Aging arteries involve T cells, specifically CD8+ T cells, which accumulate in older mice and drive arterial dysfunction. Depleting these CD8+ T cells improved arterial health in aged mice.
Area of Science:
- Immunology
- Cardiovascular Science
- Aging Research
Background:
- T cells accumulate in arteries with age, contributing to dysfunction.
- The specific T cell subtype responsible for arterial aging remains unidentified.
- CD8+ T cells show greater age-related susceptibility than CD4+ T cells.
Purpose of the Study:
- To determine if CD8+ T cell depletion ameliorates age-related arterial stiffness and endothelial dysfunction.
- To investigate the role of CD8+ versus CD4+ T cells in arterial aging.
Main Methods:
- Comparison of T cell subtypes (CD8+ and CD4+) in young and old mouse aortas and mesenteries.
- Pharmacological depletion of CD8+ or CD4+ T cells in aged mice.
- Assessment of aortic stiffness, collagen content, and endothelium-dependent dilation (nitric oxide bioavailability).
Main Results:
- Old mice showed increased aortic and mesenteric accumulation of CD8+ T cells, but not CD4+ T cells.
- Depletion of CD8+ T cells, not CD4+ T cells, reduced aortic stiffness and collagen.
- CD8+ T cell depletion in old mice enhanced endothelium-dependent dilation and nitric oxide bioavailability.
Conclusions:
- CD8+ T cells are the specific T cell subtype driving age-related arterial dysfunction.
- Targeting CD8+ T cells may represent a therapeutic strategy for arterial aging.
