郭良琦, 刘雅丽, 谭潇, 翟婷, 盛德乔, 刘亚云. 角鲨烯环氧化酶新型抑制剂的筛选及其抗肝癌的作用J. 药学学报, 2023, 58(9): 2707-2714. DOI: 10.16438/j.0513-4870.2023-0788
引用本文: 郭良琦, 刘雅丽, 谭潇, 翟婷, 盛德乔, 刘亚云. 角鲨烯环氧化酶新型抑制剂的筛选及其抗肝癌的作用J. 药学学报, 2023, 58(9): 2707-2714. DOI: 10.16438/j.0513-4870.2023-0788
GUO Liang-qi, LIU Ya-li, TAN Xiao, ZHAI Ting, SHENG De-qiao, LIU Ya-yun. Screening novel inhibitors of squalene epoxidase and their effects on hepatocellular carcinomaJ. Acta Pharmaceutica Sinica, 2023, 58(9): 2707-2714. DOI: 10.16438/j.0513-4870.2023-0788
Citation: GUO Liang-qi, LIU Ya-li, TAN Xiao, ZHAI Ting, SHENG De-qiao, LIU Ya-yun. Screening novel inhibitors of squalene epoxidase and their effects on hepatocellular carcinomaJ. Acta Pharmaceutica Sinica, 2023, 58(9): 2707-2714. DOI: 10.16438/j.0513-4870.2023-0788

角鲨烯环氧化酶新型抑制剂的筛选及其抗肝癌的作用

Screening novel inhibitors of squalene epoxidase and their effects on hepatocellular carcinoma

  • 摘要: 角鲨烯环氧化酶(squalene epoxidase, SQLE) 是治疗肝癌的潜在靶点, 生信分析表明SQLE的高表达与肝癌患者的临床分期和不良预后密切相关, 但现有的针对SQLE第195位酪氨酸残基(Y195) 的抑制剂由于毒副作用严重而无法用于临床。本研究通过计算机虚拟筛选得到35个靶向SQLE第335位酪氨酸残基(Y335) 的小分子化合物, 结合MTT实验得到3个对肝癌细胞系Huh7的增殖具有显著抑制作用的候选化合物(编号19#、31#和35#)。进一步研究发现这3个化合物均能抑制Huh7细胞的迁移, 减少胞内总胆固醇和游离胆固醇的含量, 上调抑癌基因PTEN的表达, 下调PI3K和AKT的蛋白表达。研究结果表明, 靶向SQLE Y335位点的新型抑制剂, 可降低Huh7细胞内胆固醇含量, 抑制细胞的增殖与迁移, 进而发挥抗肝癌作用。

     

    Abstract: Squalene epoxidase (SQLE) is a potential target for the treatment of liver cancer. Bioinformatics analysis indicated that the high expression of SQLE was closely related to the clinical stage and poor prognosis of patients with liver cancer. However, the existing inhibitors against SQLE 195 tyrosine residue (Y195) cannot be used clinically due to severe side effects. In this study, 35 small-molecule compounds targeting SQLE 335 tyrosine residue (Y335) were selected by computer virtual screening. Combined with MTT assay, 3 candidate compounds (19#, 31# and 35#) with significant inhibitory effects on the proliferation of Huh7 cell line were obtained. Further studies showed that these 3 compounds could inhibit the migration of Huh7 cells, reduce the contents of total and free cholesterol, up-regulate the expression of tumor suppressor gene PTEN, and down-regulate the expression of PI3K and AKT proteins. The results showed that the novel inhibitors 19#, 31# and 35# targeting SQLE Y335 could reduce cholesterol content, inhibit the proliferation and migration of Huh7, thus playing an anti-liver cancer role.

     

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