Receptor interacting protein kinase 1 (RIPK1) plays a crucial role in tumor necrosis factor (TNF)-induced necroptosis, suggesting that this pathway might be druggable. Most inhibitors of RIPK1 are classified as either type II or type III kinase inhibitors. This opened up some interesting perspectives for the discovery of novel inhibitors that target the active site of RIPK1. Tozasertib, a type I pan-aurora kinase (AurK) inhibitor, was found to show a very high affinity for RIPK1. Because tozasertib presents the typical structural elements of a type I kinase inhibitor, the development of structural analogues of tozasertib is a good starting point for identifying novel type I RIPK1 inhibitors. In this paper, we identified interesting inhibitors of mTNF-induced necroptosis with no significant effect on AurK A and B, resulting in no nuclear abnormalities as is the case for tozasertib. Compounds 71 and 72 outperformed tozasertib in an in vivo TNF-induced systemic inflammatory response syndrome (SIRS) mouse model.

中文翻译：

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Tozasertib 类似物作为坏死性细胞死亡的抑制剂

受体相互作用蛋白激酶 1 (RIPK1) 在肿瘤坏死因子 (TNF) 诱导的坏死性凋亡中起着至关重要的作用，这表明该途径可能是可药用的。大多数 RIPK1 抑制剂被归类为 II 型或 III 型激酶抑制剂。这为发现靶向 RIPK1 活性位点的新型抑制剂开辟了一些有趣的前景。Tozasertib 是一种 I 型泛极光激酶 (AurK) 抑制剂，被发现对 RIPK1 显示出非常高的亲和力。由于 tozasertib 具有 I 型激酶抑制剂的典型结构元素，因此开发 tozasertib 的结构类似物是识别新型 I 型 RIPK1 抑制剂的良好起点。在本文中，我们确定了有趣的 mTNF 诱导的坏死性凋亡抑制剂，对 AurK A 和 B 没有显着影响，导致没有像 tozasertib 那样的核异常。化合物在体内 TNF 诱导的全身炎症反应综合征 (SIRS) 小鼠模型中，71和72的表现优于 tozasertib。