SHP2 is a nonreceptor protein tyrosine phosphatase encoded by the PTPN11 gene and is involved in cell growth and differentiation via the MAPK signaling pathway. SHP2 also plays an important role in the programed cell death pathway (PD-1/PD-L1). As an oncoprotein as well as a potential immunomodulator, controlling SHP2 activity is of high therapeutic interest. As part of our comprehensive program targeting SHP2, we identified multiple allosteric binding modes of inhibition and optimized numerous chemical scaffolds in parallel. In this drug annotation report, we detail the identification and optimization of the pyrazine class of allosteric SHP2 inhibitors. Structure and property based drug design enabled the identification of protein–ligand interactions, potent cellular inhibition, control of physicochemical, pharmaceutical and selectivity properties, and potent in vivo antitumor activity. These studies culminated in the discovery of TNO155, (3S,4S)-8-(6-amino-5-((2-amino-3-chloropyridin-4-yl)thio)pyrazin-2-yl)-3-methyl-2-oxa-8-azaspiro[4.5]decan-4-amine (1), a highly potent, selective, orally efficacious, and first-in-class SHP2 inhibitor currently in clinical trials for cancer.

中文翻译：

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鉴定TNO155，一种变构SHP2抑制剂，用于治疗癌症。

SHP2是由PTPN11编码的非受体蛋白酪氨酸磷酸酶基因并通过MAPK信号通路参与细胞生长和分化。SHP2在程序性细胞死亡途径（PD-1 / PD-L1）中也起着重要作用。作为癌蛋白以及潜在的免疫调节剂，控制SHP2活性具有很高的治疗意义。作为针对SHP2的全面计划的一部分，我们鉴定了多种抑制变构结合的方式，并并行优化了许多化学支架。在此药物注释报告中，我们详细介绍了变构SHP2抑制剂吡嗪类的鉴定和优化。基于结构和特性的药物设计使蛋白质-配体相互作用，有效的细胞抑制，理化，药物和选择性特性的控制以及体内的有效作用得以鉴定抗肿瘤活性。这些研究最终发现了TNO155，（3 S，4 S）-8-（6-氨基-5-（（2-氨基-3-氯吡啶-4-基）硫代吡嗪-2-基）-3 -methyl-2-oxa-8-azaspiro [4.5] decan-4-amine（1），一种有效的，选择性的，口服有效的，一流的SHP2抑制剂，目前在癌症的临床试验中。