Antagonism of the Stat3-Stat3 Protein Dimer with Salicylic Acid Based Small Molecules
作者:Steven Fletcher、Brent D. G. Page、Xialoei Zhang、Peibin Yue、Zhi Hua Li、Sumaiya Sharmeen、Jagdeep Singh、Wei Zhao、Aaron D. Schimmer、Suzanne Trudel、James Turkson、Patrick T. Gunning
DOI:10.1002/cmdc.201100194
日期:2011.8.1
More than 50 new inhibitors of the oncogenic Stat3 protein were identified through a structure–activity relationship (SAR) study based on the previously identified inhibitor S3I‐201 (IC50=86 μM, Ki>300 μM). A key structural feature of these inhibitors is a salicylic acid moiety, which, by acting as a phosphotyrosine mimetic, is believed to facilitate binding to the Stat3 SH2 domain. Several of the
基于先前鉴定的抑制剂 S3I-201(IC 50 =86 μM , K i >300 μM ),通过构效关系 (SAR) 研究鉴定出 50 多种新的致癌 Stat3 蛋白抑制剂。这些抑制剂的一个关键结构特征是水杨酸部分,它通过充当磷酸酪氨酸模拟物,被认为有助于与 Stat3 SH2 结构域的结合。几种类似物在抑制 Stat3 DNA 结合活性方面表现出比先导化合物更高的效力,体外 IC 50范围为 18.7–51.9 μM ,并且破坏 Stat3–pTyr 肽相互作用, K i值在 15.5–41 μM 之间。米范围。特别是一种药物在乳腺癌和多发性骨髓瘤肿瘤细胞中表现出对 Stat3 磷酸化的有效抑制,抑制 Stat3 靶基因的表达,并在含有活化 Stat3 蛋白的肿瘤细胞中诱导抗肿瘤作用。