Age-dependent mechanical stress underlies unexpected vestibular differentiation and regeneration patterns

Mechanical stress in mouse vestibular explants changes with age and, when perturbed, shifts hair-cell differentiation and regeneration patterns linked to Notch-mediated lateral inhibition deviations.

• Why it matters: Regeneration of inner-ear hair cells declines rapidly during early postnatal development, but the mechanisms behind this age dependence are unclear.
• What they did: Using live imaging with single–hair-cell ablation in mouse vestibular explants, the authors tracked development and regeneration and built a mathematical model with local mechanical regulation of Notch signaling.
• The result: The model and experiments jointly capture age-dependent differentiation and regeneration patterns, suggesting local mechanics–Notch coupling shapes regenerative responses and may explain the early postnatal decline.

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