NMB-1

NMB-1 (Noxious mechanosensation blocker 1) is an analogue of a peptide isolated from a marine conesnail. This 19 amino acid peptide has shown a 30 fold selectivity in inhibiting slowly adapting mechanically activated currents over rapidly adapting ones. It is an interesting tool to distinguish between RA and SA currents. NMB-1 significantly blocks SA currents at 1 µM in sensory neurons contrary to GsMTx4. Some results suggest that NMB-1 could also block mechanosensitive ion channels in cochlear hair cells at 5 µM.