AbstractThe epithelial growth factor receptor (EGFR) signaling pathway has been proposed to benefit non‐small cell lung cancer (NSCLC) treatment. In this manuscript, we investigated the modification of 2‐aryl‐4‐aminoquinazoline, the classical backbone of the fourth‐generation EGFR inhibitors, in addition to obtaining a series of novel 2‐aryl‐4‐aminothienopyrimidine derivatives (A1~A45), we also gained further understanding of the modification of this framework. Derivatives were tested for cytotoxicity against cancer cell lines (cervical cancer cell line Hela, lung cancer cell lines A549, H1975, and PC‐9, Ba/F3‐EGFRDel19/T790M/C797S cells, and human normal hepatocytes LO2) as well as for the derivative‘s inhibitory activity against EGFRWT, EGFRL858R/T790M, and EGFRDel19/T790M/C797S kinase inhibitory activities. The results showed that most of the target compounds showed moderate to excellent activity against one or more cancer cell lines. Among them, the antitumor activity (IC50) of the most promising A9 against A549 and H1975 cell lines was 0.77±0.08 μM, 6.90±0.83 μM, respectively. At concentration of 10 μM, A9 can be employed as the fourth‐generation of EGFR inhibitors with the ability to overcome the C797S drug resistance since it can suppress EGFRDel19/T790M/C797S cells and kinase by 98.90 % and 85.88 %, respectively. Moreover, the tumor‐bearing nude mice experiment further shows that A9 can significantly inhibit the growth of tumor in vivo, with the tumor inhibition rate (TIR) of 55.92 %, which was equivalent to the positive group. After that, from the result of HE staining experiment and blood biochemical analysis experiment, A9 show low toxicity and good safety, which is worthy of further research and development.
摘要上皮生长因子受体(EGFR)信号通路被认为有利于非小细胞肺癌(NSCLC)的治疗。在本手稿中,我们研究了第四代表皮生长因子受体抑制剂的经典骨架 2-芳基-4-氨基喹唑啉的修饰,除了获得一系列新型 2-芳基-4-氨基噻吩嘧啶衍生物(A1~A45)外,我们还进一步了解了该框架的修饰。我们测试了衍生物对癌细胞株(宫颈癌细胞株 Hela、肺癌细胞株 A549、H1975 和 PC-9、Ba/F3-EGFRDel19/T790M/C797S 细胞和人类正常肝细胞 LO2)的细胞毒性,以及衍生物对 EGFRWT、EGFRL858R/T790M 和 EGFRDel19/T790M/C797S 激酶抑制活性的抑制作用。结果表明,大多数靶向化合物对一种或多种癌细胞株具有中等至卓越的活性。其中,最有希望的 A9 对 A549 和 H1975 细胞株的抗肿瘤活性(IC50)分别为 0.77±0.08 μM、6.90±0.83 μM。在10 μM浓度下,A9对EGFRDel19/T790M/C797S细胞和激酶的抑制率分别为98.90%和85.88%,可作为第四代表皮生长因子受体抑制剂,具有克服C797S耐药性的能力。此外,肿瘤裸鼠实验进一步表明,A9能显著抑制体内肿瘤的生长,肿瘤抑制率(TIR)为55.92%,与阳性组相当。此外,从 HE 染色实验和血液生化分析实验结果来看,A9 毒性低,安全性好,值得进一步研究和开发。