Muscle builds itself where the squeeze is strongest

Muscle fibres form when precursor cells fuse — and a team at Germany's Max Planck Center for Physics and Medicine has found that the 'where' is written in force, not just chemistry. As young muscle cells organise, they remodel the scaffold around them, creating hot spots of mechanical stress; it is exactly at those hot spots that cells preferentially fuse into fibres, the team reports in Nature Communications. The scaffold even keeps a memory of the pattern, guiding fresh cells later — a physical rulebook that could one day inform how we regrow damaged muscle.

SDG 9 · Industry, innovation and infrastructure — Mechanism: tech innovation