k+ current

Sematilide is a blocker of selective IKr channel.

Ibutilide Fumarate (U70226E) 是一种 III 类抗心律失常药物，可作用于急性心梗阻塞。

Flecainide hydrochloride 是一种用于预防和治疗异常快速心率的药物。这包括室性和室上性心动过速。

Dimethindene (Dimetindeno) 是 H1受体的选择性拮抗剂，阻断 K+电流。Dimethindene 表现出抗组胺和抗胆碱作用。

Cloperastine hydrochloride (HT-11 hydrochloride) 是 hERG K+电流的抑制剂，IC50为 27 nM，具有浓度依赖性。

Propafenone (Propafenonum) 是钠通道阻滞剂，它对 β 受体具有高亲和力 (IC50=32 nM)。它能够阻断瞬时外向钾电流 (Ito) (IC50: 4.9 nM) 和持续延迟整流器K+电流 (Isus) (IC50: 8.6 nM) ，具有抗心律失常的作用。它能够诱导线粒体功能障碍及诱导细胞凋亡，从而抑制食管癌增殖。

Cloperastine fendizoate (Hustazol) 是 hERG K+ 电流的抑制剂，IC50 为 27 nM。

Verapamil (CP-16533-1) 是一种非二氢吡啶类钙通道阻滞剂，一种 P-gp 抑制剂，也是一种 CYP3A4 抑制剂，具有口服活性。Verapamil 可以用于治疗高血压、心绞痛、心肌梗塞等。

MK-0448是一种新型和选择性的Kv1.5（KCNA5）通道阻滞剂，KCNA5是参与心脏复极的关键通道，与心房特异性超快速K+电流I Kur相关。

(R)-MK-0448是MK-0448的异构体。MK-0448是一种新型和选择性的Kv1.5（KCNA5）通道阻滞剂，KCNA5是参与心脏复极的关键通道，与心房特异性超快速K+电流I Kur相关。

Linopirdine (DuP 996) 是一种口服有效的，选择性 M 型 K+电流 (IM；Kv7；KCNQ Channels) 抑制剂，IC50为 2.4 μM。Linopirdine 是TRPV1激活剂。Linopirdine 是一种公认的认知增强药物，可增加大鼠脑组织中乙酰胆碱的释放。

Sematilide hydrochloride (CK-1752) 是一种选择性的 IKr 通道阻滞剂。Sematilide 以浓度依赖性抑制延迟整流钾通道 (K+current)，IC50为 25 μM。Sematilide 是一种 III 类抗心律不齐剂。

Almokalant is a class III antiarrhythmic drug, acts as a potassium channel blocker. And it inhibits a specific component (Ikr) of the time-dependent delayed rectifier K+ current.

slow delayed rectifier K+ current (IKs) blocker

LY303511 是 LY294002 的结构类似物，可增强 SHEP-1 神经母细胞瘤细胞的TRAIL 敏感性，还可逆地阻断 MIN6 胰岛瘤细胞中的K+电流，IC50为64.6±9.1 μM。

17R(18S)-EpETE is an oxylipin and a cytochrome P450 metabolite of eicosapentaenoic acid .1,217R(18S)-EpETE is an activator of large-conductance calcium-activated potassium (BKCa) channels, increasing the potassium current amplitude by 15-fold in isolated rat cerebral artery vascular smooth muscle cells (VSMCs) at +60 mV when used at a concentration of 50 nM.2It has negative chronotropic effects in isolated neonatal rat cardiomyocytes (NRCMs; EC50= ~1-2 nM) and prevents calcium-induced increases in the spontaneous beating of NRCMs.3,4 1.Schwarz, D., Kisselev, P., Ericksen, S.S., et al.Arachidonic and eicosapentaenoic acid metabolism by human CYP1A1: Highly steroselective formation of 17(R), 18(S)-epoxyeicosatetraenoic acidBiochem. Pharmacol.67(8)1445-1457(2004) 2.Lauterbach, B., Barbosa-Sicard, E., Wang, M.H., et al.Cytochrome P450-dependent eicosapentaenoic acid metabolites are novel BK channel activatorsHypertension39(2 Pt. 2)609-613(2002) 3.Falck, J.R., Wallukat, G., Puli, N., et al.17(R),18(S)-Epoxyeicosatetraenoic acid, a potent eicosapentaenoic acid (EPA) derived regulator of cardiomyocyte contraction: Structure-activity relationships and stable analoguesJ. Med. Chem.54(12)4109-4118(2011) 4.Arnold, C., Markovic, M., Blossey, K., et al.Arachidonic acid-metabolizing cytochrome P450 enzymes are targets of omega-3 fatty acidsJ. Biol. Chem.285(43)32720-32733(2010)

Zonisamide-13C2,15N is intended for use as an internal standard for the quantification of zonisamide by GC- or LC-MS. Zonisamide is an antiepileptic agent.1 It selectively inhibits the repeated firing of sodium channels (IC50 = 2 μg ml) in mouse embryo spinal cord neurons and inhibits spontaneous channel firing when used at concentrations greater than 10 μg ml.2 In rat cerebral cortex neurons, zonisamide (1-1,000 μM) inhibits T-type calcium channels with a maximum reduction of 60% of the calcium current.3 Zonisamide inhibits H. pylori recombinant carbonic anhydrase (CA) and the human CA isoforms I, II, and V with Ki values of 218, 56, 35, and 21 nM, respectively.4,5 In mice, it has anticonvulsant activity against maximal electroshock seizure (MES) and pentylenetetrazole-induced maximal, but not minimal, seizures (ED50s = 19.6, 9.3, and >500 mg kg, respectively). Zonisamide (40 mg kg, p.o.) prevents MPTP-induced decreases in the levels of dopamine , but not homovanillic acid or dihydroxyphenyl acetic acid , and increases MPTP-induced decreases in the dopamine turnover rate in mouse striatum in a model of Parkinson's disease.6 Formulations containing zonisamide have been used in the treatment of partial seizures in adults with epilepsy. |1. Masuda, Y., Ishizaki, M., and Shimizu, M. Zonisamide: Pharmacology and clinical efficacy in epilepsy. CNS Drug Rev. 4(4), 341-360 (1998).|2. Rock, D.M., Macdonald, R.L., and Taylor, C.P. Blockade of sustained repetitive action potentials in cultured spinal cord neurons by zonisamide (AD 810, CI 912), a novel anticonvulsant. Epilepsy Res. 3(2), 138-143 (1989).|3. Suzuki, S., Kawakami, K., Nishimura, S., et al. Zonisamide blocks T-type calcium channel in cultured neurons of rat cerebral cortex. Epilepsy Res. 12(1), 21-27 (1992).|4. Nishimori, I., Vullo, D., Minakuchi, T., et al. Carbonic anhydrase inhibitors: Cloning and sulfonamide inhibition studies of a carboxyterminal truncated α-carbonic anhydrase from Helicobacter pylori. Bioorg. Med. Chem. Lett. 16(8), 2182-2188 (2006).|5. De Simone, G., Di Fiore, A., Menchise, V., et al. Carbonic anhydrase inhibitors. Zonisamide is an effective inhibitor of the cytosolic isozyme II and mitochondrial isozyme V: Solution and X-ray crystallographic studies. Bioorg. Med. Chem. Lett. 15(9), 2315-2320 (2005).|6. Yabe, H., Choudhury, M.E., Kubo, M., et al. Zonisamide increases dopamine turnover in the striatum of mice and common marmosets treated with MPTP. J. Pharmacol. Sci. 110(1), 64-68 (2009).

Resibufogenin (Bufogenin) 是华蟾素的成分之一，表现出抑制氧化应激及肿瘤再生的活性。

Irdabisant (CEP-26401) hydrochloride 是一种选择性、口服活性的组胺H3受体拮抗剂 逆激动剂，具备良好的血脑屏障渗透性。该化合物对大鼠和人类的H3受体具有高亲和力，其Ki值分别为7.2 nM和2.0 nM。此外，Irdabisant hydrochloride在抑制hERG电流方面表现出较低的活性，IC50为13.8 μM。在大鼠社会认知模型中，它展现了认知增强和唤醒的效果，可作为精神分裂症或认知障碍研究的潜在工具。

F 15845 is a blocker of the persistent sodium current prevents consequences of hypoxia in rat femoral artery. F15845 has been shown to selectively inhibit the persistent sodium current of Nav1.5[1] exerting cardioprotective effects following ischemia. In vitro testing showed minimal effects of F15845 on other important ion channels of the heart, including major Ca2+ and K+ channels.[1] This characteristic is thought to account for the limited effect of F15845 to change other heart parameters such as basal cardiac function, hemodynamic functions and ventricular fibrillation. F15845 was also shown to exert improved effects when the membrane potential was depolarized,[1] by acting on the extracellular side of the channel.

AmmTX3 TFA为来源于蝎子Androctonus mauretanicus毒液的肽类毒素，特异性拮抗Kv4通道，有效抑制A型K+电流（Ki: 131 nM）。

Chlorahololide C is a potent and selective potassium channel blocker, it exerts potent and selective inhibition on the delayed rectifier (I(K)) K(+) current with the IC(50) value of 3.6 + - 10.1 mu M.

Phe-met-arg-phe amide trifluoroacetate is an activator of K+ current with an ED50 of 23nm on the fundus nerve.

Phe-Met-Arg-Phe, amide dose-dependently (ED50=23 nM) activates a K+ current in peptidergic caudodorsal neurons and appears to localize with neuropeptide Y in some brain regions.