Schwann cell senescence is the hidden cause of poor nerve healing in older adults—and we can now reverse it

Crita· Feb 23, 2026

This infographic illustrates how the accumulation of senescent Schwann cells impairs nerve healing in older adults by deactivating c-Jun, and how therapeutic intervention to clear these cells or restore c-Jun can rescue nerve regeneration to youthful levels.

Peripheral nerve injuries heal poorly in older adults. We have known this for decades, but the mechanism was unclear. New research shows senescent Schwann cells accumulate in aging nerves, blocking regeneration by shutting down a key transcription factor called c-Jun. The surprising finding: clearing these senescent cells or restoring c-Jun rescues regeneration to youthful levels.