Description | VU0134992 hydrochloride is the first subtype-preferring, orally active and selective blocker of Kir4.1 potassium channel pore(IC50 : 0.97 μM). |
In vitro | 在全细胞膜片钳电生理实验中,VU0134992以0.97 µM的IC50值抑制Kir4.1,并且相比Kir4.1/5.1联合通道(IC50 = 9 µM)呈现9倍选择性,在-120 mV下。在铊(Tl+)通量实验中,VU0134992对Kir4.1的选择性超过Kir1.1、Kir2.1和Kir2.2 30倍以上;对Kir2.3、Kir6.2/SUR1和Kir7.1有弱抑制作用;而对Kir3.1/3.2、Kir3.1/3.4和Kir4.2的活性相同。这一效力和选择性概况优于Kir4.1抑制剂Amitriptyline、诺替林和Fluoxetine 。化合物化学研究确认了VU0134992中对抑制Kir4.1至关重要的组成部分。膜片钳电生理、分子建模和定点突变实验鉴定了通道封锁的关键残基为内衬谷氨酸158和异亮氨酸159。 |
In vivo | VU0134992在大鼠血浆中显示出较高的未结合游离部分(fu值为0.213)。VU0134992的口服给药导致了剂量依赖性的利尿、排钠及排钾效应。VU0134992是首个具有体内活性的工具化合物,用于探索Kir4.1作为治疗高血压的新型利尿靶标的治疗潜力。 |
Animal experiments | VU0134992 hydrochloride (250-300 g Male Sprague-Dawley rats;50 and 100 mg/kg) Oral gavage |
molecular weight | 447.84 |
Molecular formula | C20H32BrClN2O2 |
CAS | 1052515-91-9 |
Storage | Powder: -20°C for 3 years | In solvent: -80°C for 1 year |
Solubility | DMSO: 230 mg/mL (513.58 mM), Sonication is recommended. |
References | 1. Kharade SV, et al. Discovery, Characterization, and Effects on Renal Fluid and Electrolyte Excretion of the Kir4.1 Potassium Channel Pore Blocker, VU0134992. Mol Pharmacol. 2018 Aug;94(2):926-937. |