Tissue-wide Erk oscillations set the pace of zebrafish notochord segmentation

Tissue-wide Erk oscillations synchronize zebrafish notochord segmentation, controlling the formation of mineralizing segments with a periodic rhythm.

• Why it matters: Understanding signaling oscillators in development is crucial because they coordinate the timing of repeated structures, yet few such mechanisms are known in vertebrate patterning.
• What they did: The study used live imaging and molecular analysis to identify synchronous Erk activity oscillations in the zebrafish notochord, driven by feedback from spry, dusp, and Egf ligand expression.
• The result: These Erk oscillations set the pace for segmentation, providing a tissue-wide clock that orchestrates vertebral column development, highlighting a novel signaling oscillator in vertebrate morphogenesis.