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Zileuton

现货
Catalog No.
A5384
5-脂氧合酶(5-LOX)抑制剂
组合的产品项目
规格价格库存 数量
10mM (in 1mL DMSO)
¥ 550.00
现货
100mg
¥ 1,000.00
现货

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Background

IC50: Zileuton inhibited 5-hydroxyeicosatetraenoic aicd synthesis in rat basophilic leukemia cell and polymorphonuclear leukocytes (IC50 = 0.5 and 0.3 μM), respectively [1].
5-Lipoxygenase pathway is to form leukotrienes, including leukotriene B4 (LTB4), 5-oxo-6E,8Z,11Z,14Z-eicosatetranoic acid and the cysteinyl leukotrienes (LTC4, LTD4 and LTE4) and activates all four leukotriene receptors, BLT1, BLT2, cysLT1 and cysLT2. Zileuton is the only commercially available inhibitor of the 5-Lipoxygenase pathway.
In vitro: Treatment of H9c2 cells with zileuton efficiently induced COX-2 expression and PGE2 biosynthesis in a time- and dose-dependent manner. Zileuton also exerted a profound protective effect against H2O2-induced oxidative stress, a mimic of reperfusion damage in vitro, and this protective effect was abolished by COX-2-selective inhibitor. Furthermore, zileuton-stimulated ERK1/2 and Akt phosphorylation was attenuated by rottlerin, indicating that PKCδ might act upstream of ERK1/2 and Akt. These results suggest that zileuton-induced COX-2 expression is sequentially mediated through PKCδ-dependent activation of ERK1/2 and Akt. Based on these findings, we propose that zileuton might provide a new therapeutic strategy for ischemia/reperfusion injury of the heart [2].
In vivo: To investigate the mechanism underlying zileuton's neuroprotection, SD rats underwent permanent middle cerebral artery occlusion (MCAO), then received treatment with zileuton or vehicle after the onset of ischemia. Zileuton was found to significantly reduce neurological deficit scores, cerebral infarct volume, MPO activity, and the lipid peroxidation levels. It also inhibited the expression of NF-kappaB and decreased the expression and activity of iNOS in rat brain. In addition, zileuton attenuated the release of TNF-alpha and IL-1beta in serum. These results suggested that zileuton reduces inflammatory reaction and brain damage in a rat model of permanent focal cerebral ischemia. The neuroprotective effect of zileuton in cerebral ischemia might be associated with the inhibition of inflammatory reaction [3].
Clinical trial:
Zileuton (trade name ZYFLO) is an orally active inhibitor of 5-lipoxygenase, and thus inhibits leukotrienes (LTB4, LTC4, LTD4, and LTE4) formation. Zileuton is used for the maintenance treatment of asthma. Zileuton was introduced in 1996 by Abbott Laboratories and is now marketed in two formulations by Cornerstone Therapeutics Inc. under the brand names ZYFLO and ZYFLO CR. Given the important role that leukotrienes play in airway inflammation, zileuton provides an additional therapeutic option in the management of chronic, persistent asthma, particularly those asthmatics with more severe disease. In addition, zileuton has shown promise in a number of other conditions, including upper airway inflammatory conditions, dermatological disease and chronic obstructive pulmonary disease. The development of new formulations, including a controlled release tablet formulation for b.i.d. dosing and an intravenous preparation for acute asthma exacerbations may enhance clinical utility and expand therapeutic indications.
Reference:
[1] Carter GW, Young PR, Albert DH, Bouska J, Dyer R, Bell RL, Summers JB, Brooks DW. 5-lipoxygenase inhibitory activity of zileuton. J Pharmacol Exp Ther. 1991;256(3):929-37.
[2] Hyun-Jeong Kwak, Kyoung-Mi Park, Hye-Eun Choi, Hyun-Joung Lim, Jin-Hee Park, Hyun-Young Park. The cardioprotective effects of zileuton, a 5-lipoxygenase inhibitor, are mediated by COX-2 via activation of PKCδ. Cellular Signalling 22 (2010) 80-87
[3] Tu XK, Yang WZ, Wang CH, Shi SS, Zhang YL, Chen CM, Yang YK, Jin CD, Wen S.Zileuton reduces inflammatory reaction and brain damage following permanent cerebral ischemia in rats. Inflammation. 2010;33(5):344-52.

Chemical Properties

Physical AppearanceA solid
StorageStore at -20°C
M.Wt236.29
Cas No.111406-87-2
FormulaC11H12N2O2S
Solubility≥13.3mg/mL in DMSO, ≥12.73 mg/mL in EtOH, <2.49 mg/mL in H2O
Chemical Name1-[1-(1-benzothiophen-2-yl)ethyl]-1-hydroxyurea
SDFDownload SDF
Canonical SMILESCC(C1=CC2=CC=CC=C2S1)N(C(=O)N)O
运输条件试用装:蓝冰运输。 其他可选规格:常温运输或根据您的要求用蓝冰运输。
一般建议为了使其更好的溶解,请用37℃加热试管并在超声波水浴中震动片刻。不同厂家不同批次产品溶解度各有差异,仅做参考。若实验所需浓度过大至产品溶解极限,请添加助溶剂助溶或自行调整浓度。

试验操作

细胞实验 [1]:

细胞系

H9c2细胞

制备方法

在DMSO中的溶解度大于13.3 mg/mL。若配制更高浓度的溶液,一般步骤如下:请将试管置于37 °C加热10分钟和/或将其置于超声波浴中震荡一段时间。原液于-20 °C可放置数月。

反应条件

0 ~ 100 μM;0 ~ 24小时

实验结果

Zileuton呈时间和剂量依赖性地诱导COX-2蛋白表达,但不改变COX-1蛋白水平。使用50 μM Zileuton处理5小时后,COX-2蛋白水平达到峰值,上述水平持续长达12小时。此外,Zileuton治疗显著抑制H2O2诱导的细胞死亡。

动物实验 [2]:

动物模型

大鼠永久MCAO模型

给药剂量

50 mg/kg;口服给药

实验结果

在大鼠永久MCAO模型中,Zileuton显著减少神经损伤和脑梗死体积。 HE染色结果显示,Zileuton减少坏死性或缺血性损伤神经元。此外,Zileuton还显著减少MCAO诱导的MPO活性、MDA含量、NF-κB p65免疫阳性细胞、iNOS mRNA和iNOS蛋白表达、以及血清TNF-α和IL-1β水平的升高。

注意事项

请于室内测试所有化合物的溶解度。虽然化合物的实际溶解度可能与其理论值略有不同,但仍处于实验系统误差的允许范围内。

References:

[1]. Hyun-Jeong Kwak, Kyoung-Mi Park, Hye-Eun Choi, Hyun-Joung Lim, Jin-Hee Park, Hyun-Young Park. The cardioprotective effects of zileuton, a 5-lipoxygenase inhibitor, are mediated by COX-2 via activation of PKCδ. Cellular Signalling 22 (2010) 80-87.

[2]. Tu XK, Yang WZ, Wang CH, Shi SS, Zhang YL, Chen CM, Yang YK, Jin CD, Wen S.Zileuton reduces inflammatory reaction and brain damage following permanent cerebral ischemia in rats. Inflammation. 2010;33(5):344-52.

质量控制

化学结构

Zileuton