ML67-33 rapidly and reversibly affects K2P2.1 (TREK-1) (EC50s: 36.3 μM and 9.7 μM in cell-free and HEK293 cells, respectively). ML67-33 is a selective activator of temperature- and mechano-sensitive K2P channels.
Lig4-4 is a TREK-1 current inhibitor (IC50 = 2.06 μM) that has demonstrated potential for use as a protective agent against cerebral ischemia. It has been postulated that the neuroprotective effects of Lig4-4 against cerebral ischemia may be attributed to the modulation of Bcl-2 and cleaved-caspase-3 expression, leading to the inhibition of neuronal apoptosis.