Scientists discover a hidden force that helps wire the brain

Scientists discovered that Piezo1, a protein in developing brains, connects physical and chemical signals that guide neuron growth. When brain tissue becomes stiffer, Piezo1 detects this change and triggers cells to produce chemical guidance molecules like Semaphorin 3A, which direct axons along proper pathways. This protein also maintains tissue stability by regulating adhesion proteins that keep cells connected. The breakthrough reveals how mechanical forces directly control chemical signaling in brain development, potentially leading to new treatments for developmental disorders and cancer.