James Kirkland

Director of the Center for Advanced Gerotherapeutics at Cedars-Sinai, senior author of the study

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Last updated Oct 14, 2026

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Scientists find protein that lets 'zombie cells' hide from immune system

New Capabilities

Active researcher at Cedars-Sinai

A protein called PD-L2 helps aging "zombie cells" hide from the immune system, scientists at Cedars-Sinai reported. Blocking the protein in mice let the immune system clear these cells, reduced inflammation, and improved blood sugar regulation and grip strength.

Updated Oct 14