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Therapeutic Potential of Targeting the Oncogenic SHP2 Phosphatase

机译:靶向致癌SHP2磷酸酶的治疗潜力

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摘要

, The Src homology 2 domain containingprotein tyrosine phosphatase-2(SHP2) is an oncogenic phosphatase associated with various kinds ofleukemia and solid tumors. Thus, there is substantial interest indeveloping SHP2 inhibitors as potential anticancer and antileukemiaagents. Using a structure-guided and fragment-based library approach,we identified a novel hydroxyindole carboxylic acid-based SHP2 inhibitor 11a-1, with an IC50 value of 200 nMand greater than 5-fold selectivity against 20 mammalian PTPs. Structuraland modeling studies reveal that the hydroxyindole carboxylic acidanchors the inhibitor to the SHP2 active site, while interactionsof the oxalamide linker and the phenylthiophene tail with residuesin the β5–β6 loop contributeto 11a-1’s binding potency and selectivity.Evidence suggests that 11a-1 specificallyattenuates the SHP2-dependent signaling inside the cell. Moreover, 11a-1 blocks growth factor mediated Erk1/2 andAkt activation and exhibits excellent antiproliferative activity inlung cancer and breast cancer as well as leukemia cell lines.
机译:,包含蛋白酪氨酸磷酸酶2(SHP2)的Src同源2域是与多种白血病和实体瘤相关的致癌磷酸酶。因此,在开发作为潜在抗癌药和抗白血病药的SHP2抑制剂方面引起了极大的兴趣。使用结构指导和基于片段的文库方法,我们鉴定了一种新型的基于羟基吲哚羧酸的SHP2抑制剂11a-1,IC50值为200 nM,对20种哺乳动物PTP的选择性大于5倍。结构和模型研究表明,羟基吲哚羧酸可将抑制剂锚定在SHP2活性位点上,而草酰胺键和苯噻吩尾与β5–β6环中的残基之间的相互作用则有助于11a-1的结合力和选择性。细胞内依赖SHP2的信号传导。此外,11a-1阻断生长因子介导的Erk1 / 2和Akt活化,并在肺癌,乳腺癌以及白血病细胞系中表现出出色的抗增殖活性。

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