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首页> 外文期刊>Oncogene >Novel synthetic bisindolylmaleimide alkaloids inhibit STAT3 activation by binding to the SH2 domain and suppress breast xenograft tumor growth
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Novel synthetic bisindolylmaleimide alkaloids inhibit STAT3 activation by binding to the SH2 domain and suppress breast xenograft tumor growth

机译:新型合成双吲哚马来酰亚胺生物碱通过与 SH2 结构域结合抑制 STAT3 激活并抑制乳腺异种移植肿瘤生长

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摘要

Signal transducer and activator of transcription 3 (STAT3) is constitutively activated in malignant tumors and plays important roles in multiple aspects of cancer aggressiveness. Thus, targeting STAT3 promises to be an attractive strategy for the treatment of advanced metastatic tumors. Bisindolylmaleimide alkaloid (BMA) has been shown to have anticancer activities and was thought to suppress tumor cell growth by inhibiting protein kinase C. In this study, we show that a newly synthesized BMA analog, BMA097, is effective in suppressing tumor cell and xenograft growth and in inducing spontaneous apoptosis. We also provide evidence that BMA097 binds directly to the SH2 domain of STAT3 and inhibits STAT3 phosphorylation and activation, leading to reduced expression of STAT3 downstream target genes. Structure activity relationship analysis revealed that the hydroxymethyl group in the 2,5-dihydropyrrole-2,5-dione prohibits STAT3 inhibitory activity of BMA analogs. Altogether, we conclude that the synthetic BMA analogs may be developed as anti-cancer drugs by targeting and binding to the SH2 domain of STAT3 and inhibiting the STAT3 signaling pathway.
机译:信号转导和转录激活因子 3 (STAT3) 在恶性肿瘤中组成型激活,并在癌症侵袭性的多个方面发挥重要作用。因此,靶向 STAT3 有望成为治疗晚期转移性肿瘤的一种有吸引力的策略。双吲哚马来酰亚胺生物碱 (BMA) 已被证明具有抗癌活性,并被认为通过抑制蛋白激酶 C 来抑制肿瘤细胞生长。在这项研究中,我们发现新合成的BMA类似物BMA097可有效抑制肿瘤细胞和异种移植物的生长以及诱导自发细胞凋亡。我们还提供了证据表明 BMA097 直接与 STAT3 的 SH2 结构域结合并抑制 STAT3 磷酸化和激活,导致 STAT3 下游靶基因的表达降低。结构活性关系分析表明,2,5-二氢吡咯-2,5-二酮中的羟甲基抑制BMA类似物的STAT3抑制活性。总而言之,我们得出结论,合成的 BMA 类似物可以通过靶向和结合 STAT3 的 SH2 结构域并抑制 STAT3 信号通路来开发为抗癌药物。

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