Using a previously reported flexible alignment model we have designed, synthesized, and evaluated a series of compounds at the human histamine H 4 receptor (H 4R) from which 2-(4-methyl-piperazin-1-yl)-quinoxaline ( 3) was identified as a new lead structure for H 4R ligands. Exploration of the structure-activity relationship (SAR) of this scaffold led to the identification of 6,7-dichloro 3-(4-methylpiperazin-1-yl)quinoxalin-2(1 H)-one (VUF 10214, 57) and 2-benzyl-3-(4-methyl-piperazin-1-yl)quinoxaline (VUF 10148, 20) as potent H 4R ligands with nanomolar affinities. In vivo studies in the rat reveal that compound 57 has significant anti-inflammatory properties in the carrageenan-induced paw-edema model.

中文翻译：

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基于片段的新型H4受体配体在体内具有抗炎特性。

使用先前报告的灵活比对模型，我们已经设计，合成和评估了人类组胺H 4受体（H 4R）上的一系列化合物，其中2-（4-甲基-哌嗪-1-基）-喹喔啉（3）被鉴定为H 4R配体的新的先导结构。探索该支架的构效关系（SAR）导致鉴定出6,7-二氯3-（4-甲基哌嗪-1-基）喹喔啉-2（1 H）-一（VUF 10214，57）和2-苄基-3-（4-甲基-哌嗪-1-基）喹喔啉（VUF 10148，20）作为具有纳摩尔亲和力的强效H 4R配体。在大鼠体内的研究表明，化合物57在角叉菜胶诱导的爪水肿模型中具有显着的抗炎特性。