Mechanosensitive cation channel (MSC)

Mechanosensitive cation channels (MSCs) are specialized pore-forming membrane proteins that gate in response to physical stimuli, such as membrane tension, shear stress, and pressure (Coste et al., 2010, Science). They serve as the primary molecular transducers for mechanosensation, converting mechanical force into ionic currents that trigger downstream signaling pathways (Ranade et al., 2015, Neuron). The most prominent members of this class in mammals are the Piezo proteins, specifically Piezo1 and Piezo2, which are essential for physiological processes including touch perception, proprioception, and vascular development (Li et al., 2014, Nature). Dysregulation of these channels is implicated in various human diseases, such as dehydrated hereditary stomatocytosis, lymphatic dysplasia, and chronic mechanical allodynia (Alper, 2017, Current Opinion in Physiology). Pharmacological modulation of MSCs is an active area of research, with small molecules like Yoda1 acting as chemical activators and the peptide GsMTx4 serving as a potent inhibitor (Syeda et al., 2015, eLife). Given their widespread expression in the cardiovascular, respiratory, and nervous systems, these channels represent significant therapeutic targets for treating hypertension, pain, and skeletal disorders (Douguet et al., 2019, Annual Review of Physiology).

Other names

Stretch-activated channelSACMechanically gated ion channelMechanotransducer channelStretch-activated cation channel

Modulation of channel gating in response to mechanical membrane tension or direct ligand binding to stabilize open or closed states.