Eric Topol unpacks landmark Immunity study linking GZMK+/GZMB+ T cell ratio to healthspan
EricTopol · x · 2026-10-12
Eric Topol breaks down a landmark immune-aging study published Oct 9 in Immunity, led by Maxim Artyomov's team.
Scale
- 8 international cohorts, 2,609 people aged 18–98, over 12.39 million single white blood cells profiled via sc-RNA seq, harmonized into 59 immune cell types
Key findings
- Thymic involution after puberty drives a steady loss of naive T cells and recent thymic emigrants — the strongest predictor of chronological age
- Healthy vs. unhealthy immune aging tracks the ratio of GZMK+ to GZMB+ CD8+ effector memory T cells: a higher ratio marks healthier trajectories
- This ratio offers a practical, measurable indicator of immune status with real implications for extending healthspan
Related event: Landmark 12-million-cell study maps immune aging(3 posts)→
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