生物活性 | |||
---|---|---|---|
靶点 |
|
||
描述 | Leukotrienes (LT) are metabolites of arachidonic acid (AA) formed from the 5-lipoxygenase (5-LOX) pathway. They exhibit a number of biological effects such as contraction of smooth muscles, especially bronchoconstriction, increased vascular permeability, and migration of leukocytes to areas of inflammation. Zileuton is a potent and selective inhibitor of 5-lipoxygenase with antiasthmatic properties[3]. In macrophages, zileuton overinterfered with arachidonic acid (AA) release to inhibit PG biosynthesis. In activated mouse peritoneal macrophages and macrophage J774, zileuton significantly reduces PGE2 and 6-ketone prostaglandin F1α (PGF1α) levels[4]. In anti-CD3-treated cells, IL-2 decreased in zileuton-treated and untreated cells with increasing incubation time. Zileuton likely reduced IL-2 levels by inhibiting 5-lipoxygenase[3]. Zileuton treatement on rats with TNB colitis, however, showed a significant reduction in the macroscopic damage score after four weeks of treatment compared with 5-ASA and placebo groups. The intracolonic administration of 50 mg/kg of zileuton after colitis induction decreased the local peak release of LTB4 by 90%[5]. In zileuton (5 mg/kg, p.o.) treated ischemia/reperfusion (I/R) rat, the effect of zileuton to decrease NF-κB expression did not change significantly in the presence of COX inhibitors, and the group revealed significantly lower level of NF-κB staining. Zileuton (5 mg/kg, p.o.) treatment given to I/R rats decreased apoptotic index significantly. In 5-LOX gene knockout mice, administration of zileuton before I/R significantly reduced the degree of renal dysfunction (urea, creatinine) and injury (AST, histology). In addition, zileuton reduced the expression of ICAM-1 and the associated polymorphonuclear leukocyte infiltration caused by I/R of the mouse kidney[6]. Although zileuton inhibited LTB4 production in the peritonitis model more effectively than the LTA4H inhibitor, the influx of neutrophils into the peritoneum after 1 and 2h was significantly higher in zileuton- versus JNJ-26993135-treated animals[7]. |
临床研究 | |||||
---|---|---|---|---|---|
NCT号 | 适应症或疾病 | 临床期 | 招募状态 | 预计完成时间 | 地点 |
NCT00595114 | - | Completed | - | United States, Massachusetts ... 展开 >> Brigham and Women's Hospital Boston, Massachusetts, United States, 02115 收起 << | |
NCT00595114 | - | Completed | - | - | |
NCT01125748 | - | Completed | - | - |
实验方案 | |||
---|---|---|---|
1mg | 5mg | 10mg | |
1 mM 5 mM 10 mM |
4.23mL 0.85mL 0.42mL |
21.16mL 4.23mL 2.12mL |
42.32mL 8.46mL 4.23mL |
参考文献 |
---|