基于结构设计的新型mTOR抑制剂的抗宫颈癌活性研究（英文）

激酶mTOR是PI3K-AKT信号通路的关键组成部分,该激酶在宫颈癌细胞中被高度激活。本文运用基于结构的药物发现等手段发现了一系列mTOR激酶抑制剂并对其进行生物学评价,发现其可发挥有效的抗宫颈癌作用。酶活性测定结果显示化合物C3具有潜在的mTOR抑制作用(IC₅₀=1.57μM)。随后利用分子对接和动力学模拟探究并预测m TOR激酶和C3的结合模式,初步探讨了化合物的构效关系。在多种肿瘤细胞系上进行细胞增殖活性实验时发现,C3对宫颈癌细胞He La表现出较好的增殖抑制活性(IC₅₀=0.38μM)。此外, C3还能浓度依赖性地降低磷酸化核糖体S6 (p-S6)蛋白在HeLa细胞内的表达水平。值得注意的是,C3发挥显著的抗宫颈癌活性很有可能是mTOR通路和其他细胞内通路的共同作用。本研究表明C3可进一步开发为宫颈癌的治疗药物。

Structure-based design and biological evaluation of novel mTOR inhibitors as potential anti-cervical agents

The mammalian target of rapamycin (mTOR) is a critical component of the PI3K-AKT signaling pathway. It is highly activated in cervical cancer, which continues to pose an important clinical challenge with an urgent need for new and improved therapeutic approaches. Herein, we describe the structure-based drug discovery and biological evaluation of a series of mTOR kinase inhibitors as potential anti-cervical cancer agents. The results of enzymatic activity assays supported C3 as a potential mTOR inhibitor, which exhibited high inhibitory activity with an IC₅₀ of 1.57 μM. Molecular docking and dynamics simulation were conducted to predict the binding patterns, suggesting relationships between structure and activity. The anti-proliferative assay against diverse cancer cell lines was displayed subsequently, revealing that C3 exhibited significant proliferation inhibition against cervical cancer cell HeLa (IC₅₀ = 0.38 μM) compared with other cell lines. Moreover, C3 could effectively reduce the expression of phospho-ribosomal S6 protein (p-S6) in HeLa cells in a dose-dependent manner. Noteworthily, mTOR signaling and other cellular pathways might contribute to the significant effect of C3 against cervical cancer simultaneously. These data indicated that C3 represented a good lead molecule for further development as a therapeutic agent for cervical cancer treatment.