Piezo Channel (Piezo通道)

Piezo channels are the trimeric mechanosensitive ion channels that open in response to mechanical stimuli such as shear stress and membrane stretch, allowing positively charged ions, including calcium, to flow into the cell. It is speculated that extracellular mechanical stimuli can be converted into tension from lipid molecules in the cell membrane to activate the Piezo channels. The intracellular beam might transmit tension from lipid molecules from the distal blade to the central pore module by means of a lever principle, which opens the central pore for ion-conducting. Most vertebrates have two channel isoforms, Piezo1 and Piezo2. Piezo1 and Piezo2 are involved in various mechanotransduction pathways, including touch sensation, proprioception, nociception, vascular development, and breathing. In humans, gain-of-function mutations in Piezo1 are linked to dehydrated hereditary stomatocytosis (DHS). Loss-of-function mutations in Piezo1 and Piezo2 are linked to congenital lymphatic dysplasia14 and defective touch perception and proprioception.