Engineered mechanosensitive channel (EMC) (EMC)

The Engineered Mechanosensitive Channel (EMC), also known as the Sensor-Actuator-Modulator (SAM), is a synthetic ion channel derived from the bacterial Mechanosensitive Channel of Large Conductance (MscL). It is designed to function as an autonomous, tension-activated pressure-release valve when expressed in the plasma membrane of transduced mammalian cells. In the context of glaucoma therapy, the EMC is delivered via an adeno-associated virus (AAV) vector to the trabecular meshwork, where it remains closed under normal physiological conditions. When intraocular pressure rises, the resulting increase in membrane tension triggers the channel to open its large, non-selective pore, facilitating the drainage of aqueous humor and restoring pressure homeostasis. This barogenetic approach offers a mutation-agnostic gene therapy that could potentially eliminate the need for daily eye drops or invasive surgical procedures. Beyond its application in ophthalmology, engineered mechanosensitive channels are being investigated for use in sonogenetics to enable non-invasive neuromodulation and to improve the delivery of membrane-impermeable therapeutic agents.

Other names

Sensor-Actuator-ModulatorSAMEngineered MscLMechanosensitive channel of large conductance (engineered)Barogenetic channel

The engineered mechanosensitive channel (EMC) acts as a tension-activated pressure release valve. When expressed in the plasma membrane of transduced cells, it remains closed at normal pressures but opens its large non-selective pore in response to increased membrane tension caused by elevated intraocular pressure, allowing for the efflux of fluid and autonomous reduction of pressure.