Uses
NS5806, a potent potassium current activator, increases KV4.3/KChIP2 peak current amplitudes with an EC50 of 5.3 μM. NS5806 slows KV4.3 and KV4.2 current dacay in channel complexes containing KChIP2[1].
Biochem/physiol Actions
NS5806 increases peak current amplitude of the potassium channel Kv4.3 (EC50 = 5.3 uM). NS5806 also slows Kv4.3 and Kv4.2 current dacay in channel complexes containing KChIP2. In ventricular cardiomycytes, NS5806 increases transient outward current and reproduces the electrocardiographic profile of Brugada syndrome.
References
[1] Lundby A, et al. Effect of the I(to) activator NS5806 on cloned KV4 channels depends on the accessory protein KChIP2. Br J Pharmacol. 2010 Aug;160(8):2028-44. doi: 10.1111/j.1476-5381.2010.00859.x. DOI:
10.1111/j.1476-5381.2010.00859.x[2] Cheng H, et al. Differential responses of rabbit ventricular and atrial transient outward current (Ito) to the Itomodulator NS5806. Physiol Rep. 2017 Mar;5(5). pii: e13172. DOI:
10.14814/phy2.13172
