化合物 Quinine hydrobromide T61999

Product Introduction
Bioactivity


英文名: Quinine hydrobromide

描述: Quinidine hydrobromide 是有效的、选择性的的、具有口服活性的细胞色素 P450db (cytochrome P450db) 抑制剂。Quinidine hydrobromide 是 K+通道 (K+channel) 的有效阻断剂（IC50= 19.9 μM）。Quinidine hydrobromide 具有抗心律失常的作用。Quinidine hydrobromide 也可用作疟疾的研究。

体外活性: Quinidine hydrobromide is an anti-arrythmic drug which affects ionic currents in heart muscle and which has also been shown to be a potent blocker of several classes of K + channel in a variety of cell types [1]. Bath application of quinidine hydrobromide causes a dose-dependent reduction of the peak amplitude of I k. The K d for blockade of I k at 0 mV is estimated to be 41 μM [1]. Quinidine hydrobromide elicits a dose-dependent increase of the rate of the decay of I k and this effect is enhanced by membrane depolarization. Quinidine also causes a 5 mV hyperpolarizing shift of the steady-state inactivation curve and increases the half-time for recovery from inactivation. Quinidine hydrobromide does not affect the onset of inactivation measured at -30 mV [1].

体内活性: Quinidine hydrobromide is rapidly absorbed, with peak plasma concentrations 60-90 min after an oral dose. Other salts (gluconate, polygalacturonate) are more slowly absorbed, with lower peak concentrations [2]. Quinidine hydrobromide is approximately 70-90 % bound to plasma proteins. It undergoes hepatic oxidative metabolism to form an N-oxide, a 3-hydroxy form, an O-demethyl form and 2'-quinidinone [2]. Quinidine hydrobromide inhibits metabolism of amphetamine in rats. Quinidine hydrobromide pretreatment results in a significant decrease in the excretion of p-hydroxyamphetamine at 24 and 48 h to 7.2 and 24.1% of the vehicle-control levels, respectively, accompanied by a significant increase in amphetamine excretion between 24 and 48 h to 542% of the control [3].

存储条件: Powder: -20°C for 3 years | In solvent: -80°C for 1 year

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