NS8593 hydrochloride 是一种有效的选择性的 SK channels (小电导钙激活钾通道)抑制剂。NS8593 hydrochloride 可逆地抑制 SK3 介导的电流，K_d 值为 77 nM。NS8593 hydrochloride 抑制所有 SK1-3 亚型的 Ca²⁺ 依赖性 (在 0.5 μM Ca²⁺ 时，K_d 分别为 0.42、0.60 和 0.73 μM)，并且不影响中间电导和大电导的钙激活钾通道 (分别为 hIK 和 hBK 通道)。

NS8593 hydrochloride is a potent and selective small conductance Ca-activated K channels (SK channels) inhibitor. NS8593 hydrochloride reversibly inhibits SK3-mediated currents with a K d value of 77 nM. NS8593 hydrochloride inhibits all the SK1-3 subtypes Ca-dependently (K d s of 0.42, 0.60, and 0.73 μM, respectively, at 0.5 μM Ca), and does not affect the Ca-activated K channels of intermediate and large conductance (hIK and hBK channels, respectively).

Solid

Kd: 0.42 μM (SK1), 0.60 μM (SK2) , and 0.73 μM (SK3)

When tested in excised patches, it is found that the inhibition by NS8593 (compound 14) decreased as the intracellular [Ca] is increased and that NS8593 is equipotent when applied from either the intracellular or the extracellular side of the cell membrane. A HEK293 cell transiently transfected with hSK3 channels is inhibited by 80% upon application of 100 nM apamin and by 75% after application of 300 nM NS8593. In contrast, NS8593 inhibits the mutated channel by 45% at 300 nM. NS8593 thus remains active on the apamin-insensitive SK3 channel, although the Kd value of 0.43 μM is 4-fold higher than found for a wild-type hSK3 channel (Kd of 0.10 μM). As the potency of NS8593 is dependent on the degree of SK3 channel activation, the decreased potency could thus reflect an increased apparent Ca-sensitivity of the mutated channels. Similar to the whole-cell exp

NS8593 (compound 14) (3 and 10 mg/kg intravenously) is able to affect firing rate and firing pattern of dopaminergic neurons in vivo in C57Bl/6 mice. has not independently confirmed the accuracy of these methods. They are for reference only.

Room temperature in continental US; may vary elsewhere.

4°C, sealed storage, away from moistur In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

[1]. S?rensen US, et al. Synthesis and structure-activity relationship studies of 2-(N-substituted)-aminobenzimidazoles as potent negative gating modulators ofsmall conductance Ca2+-activated K+ channels. J Med Chem. 2008 Dec 11;51(23):7625-34.
[2]. Str?baek D, et al. Inhibitory gating modulation of small conductance Ca2+-activated K+ channels by the synthetic compound (R)-N-(benzimidazol-2-yl)-1,2,3,4-tetrahydro-1-naphtylamine (NS8593) reduces afterhyperpolarizing current in hippocampal CA1 neurons.

In Vitro: DMSO : 83.33 mg/mL (277.95 mM; Need ultrasonic)H₂O : 1 mg/mL (3.34 mM; ultrasonic and warming and heat to 60°C)配制储备液