西洛司特; 153259-65-5

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抑制剂描述：

产品名称：Cilomilast

产品别名：见爱必信官网

英文别名：Cilomilast

靶点：PDE

CAS：153259-65-5

纯度：>98%

外观：见爱必信官网

保存方法：Store at -20℃ for one year（Powder）；Store at 2-4℃ for two weeks；Store at -20℃ for six months after dissolution.

描述：

Cilomilast是一种有效的PDE4抑制剂，IC50为110 nM，具有抗炎活性和弱的中枢神经系统活性。Cilomilast作用于U937细胞，使cAMP含量增多，这种作用存在浓度依赖性。在分离的人类单核细胞中Cilomilast和(R)-rolipram抑制 LPS诱导的TNF-α形成时，效果差不多，IC50分别为7.0 和7.2。Cilomilast和(R)-rolipram 都适度抑制fMLP诱导的人类中性白细胞脱粒。

溶解性：DMSO ：69 mg/mL (200.92 mM)
Ethanol ：50 mg/mL (145.59 mM)

体外研究：

Cilomilast produces a concentration-dependent increase in cAMP content in U937 cells. Cilomilast produces a concentration-dependent increase in cAMP content in U937 cells. In isolated human monocytes, Cilomilast and (R)-rolipram are equipotent at suppressing LPS-induced TNF-α formation with -log (IC50) of 7.0 and 7.2, respectively. Both Cilomilast and (R)-rolipram produces a modest prevention of fMLP-induced degranulation of human neutrophils. Cilomilast and (R)-rolipram are equipotent at suppressing neutrophil activation with -log (IC50) of 7.1 and 6.4, respectively. Cilomilast significantly decreases the expression of TNF-α in the cornea and IL-1α, IL-1β, and TNF-α in the conjunctivaas compared to vehicle control. Cilomilast treatment markedly decreases the presence of CD11b+ antigen-presenting cells in the central and peripheral cornea, and leads to decreased conjunctival expression of cytokines IL-6, IL-23, and IL-17. Moreover, Cilomilast decreases the expression of IL-17 and IL-23 in the draining lymph nodes. Cilomilast reduces TLR4 expression, IL-8 release and neutrophil chemotactic activity as well as it increased IP-10 release and lymphocyte chemotactic activity.

体内研究：Cilomilast inhibits human TNFα production with oral ED50 of 4.9 mg/kg. In contrast to their equipotent activity against TNFα production, Cilomilast (ED50 = 2.3 mg/kg, p.o.) is 10-fold less potent than R-rolipram (ED50 = 0.23 mg/kg, p.o.) in reversing reserpine-induced hypothermia, a model of antidepressant activity. In time course studies, Cilomilast (30 mg/kg, p.o.) suppresses TNFα production for at least 10 hour. The ability of Cilomilast to modulate interleukin-4 productionin vivo is assessed in a chronic oxazolone-induced contact sensitivity model in Balb/c mice. Topical administration of Cilomilast (1000 μg) inhibits intralesional concentrations of interleukin-4. Orally administered cilomilast dose-dependently inhibits production of interleukin-4, TNF-α, and cysteinyl leukotrienes, as well as leukocyte infiltration in bronchoalveolar lavage fluid from the airways of ovalbumin-sensitized Brown Norway rats.

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