Janus kinase 1 (JAK1) plays a key role in most cytokine-mediated inflammatory and autoimmune responses through JAK/STAT signaling; thus, JAK1 inhibition is a promising therapeutic strategy for several diseases. Analysis of the binding modes of current JAK inhibitors to JAK isoforms allowed the design of N-alkyl-substituted 1-H-pyrrolo[2,3-b] pyridine carboxamide as a JAK1-selective scaffold, and the synthesis of various methyl amide derivatives provided 4-((cis-1-(4-chlorobenzyl)-2-methylpiperidin-4-yl)amino)-N-methyl-1H-pyrrolo[2,3-b]pyridine-5-carboxamide (31g) as a potent JAK1-selective inhibitor. In particular, the (S,S)-enantiomer of 31g (38a) exhibited excellent potency for JAK1 and selectivity over JAK2, JAK3, and TYK2. On investigating the effect of 31g on hepatic fibrosis, it was found that it reduces the proliferation and fibrogenic gene expression of TGF-β-induced hepatic stellate cells (HSCs). Specifically, 31g significantly inhibited TGF-β-induced migration of HSCs at 0.25 μM in wound-healing assays.

中文翻译：

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的发现和生物学评价ñ -甲基吡咯并[2,3- b ]吡啶-5-甲酰胺衍生物作为JAK1选择性抑制剂

Janus激酶1（JAK1）在大多数细胞因子介导的通过JAK / STAT信号传导的炎症和自身免疫反应中起关键作用；因此，抑制JAK1是对几种疾病的有前途的治疗策略。分析目前的JAK抑制剂与JAK同工型的结合方式，可以设计N-烷基取代的1- H-吡咯并[2,3- b ]吡啶羧酰胺作为JAK1选择性骨架，并合成各种甲基酰胺衍生物提供了4-（（顺式-1-（4-氯苄基）-2-甲基哌啶-4-基）氨基）-N-甲基-1H-吡咯并[2,3 - b ]吡啶-5-甲酰胺（31g），一种有效的JAK1选择性抑制剂。特别是（31 g（38a）的S，S） -对映异构体对JAK1表现出出色的效力，并具有超过JAK2，JAK3和TYK2的选择性。在研究31g对肝纤维化的作用时，发现它降低了TGF-β诱导的肝星状细胞（HSCs）的增殖和纤维生成基因表达。具体而言，在伤口愈合试验中，31g显着抑制TGF-β诱导的0.25μMHSC迁移。