Design, synthesis, and biological evaluation of novel napabucasin-melatonin hybrids as potent STAT3 inhibitors

被引:5
作者
Zhang, Chong [1 ]
Yang, Limin [1 ]
Yang, Xiaojuan [2 ]
Gao, Qinghe [1 ]
Qu, Yan [3 ]
Wu, Liqiang [1 ]
机构
[1] Xinxiang Med Univ, Sch Pharm, Xinxiang 453003, Peoples R China
[2] Xinxiang Univ, Sch Pharm, Xinxiang 453003, Peoples R China
[3] Xinxiang Med Univ, Sch Basic Med Sci, Xinxiang 453003, Peoples R China
基金
中国国家自然科学基金;
关键词
Napabucasin; Melatonin; STAT3; Antitumor; TRANSCRIPTION FACTOR STAT3; SMALL-MOLECULE INHIBITOR; SIGNAL TRANSDUCER; CANCER; ACTIVATOR; BREAST; DERIVATIVES; DISCOVERY; CELLS;
D O I
10.1016/j.bioorg.2023.106541
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The current work developed diverse novel napabucasin-melatonin hybrids as potent STAT3 inhibitors. Several biological studies have suggested many compounds demonstrating potent inhibition against different tumor cells. Among these, compound 7e depicted enhanced inhibition against HepG2, MDA-MB-231, and A549 cells than napabucasin, with IC50 values of 1.06, 1.38, and 1.3 mu M, respectively. Based on fluorescence polarization analysis, compound 7e was bound to the SH2 domain in STAT3, with an IC50 value of 12.95 mu M. Molecular docking further confirmed the 7e binding mode inside the SH2 domain of STAT3. Further mechanistic studies indicated that 7e inhibited the activation of STAT3 (Y705), and thus reduced the expression of STAT3 down-stream genes (CyclinD1, Bcl-2 and c-Myc) instead of affecting p-STAT1 expression. Meanwhile, the phosphory-lation levels of its upstream kinases JAK2 and bypass kinase Erk1/2 remain unaffected. Simultaneously, 7e induced cancer cell apoptosis in a concentration-dependent manner. Significantly, 20 mg/kg (i.p.) compound 7e suppressed the mouse HepG2 xenograft development in vivo without body weight loss, suggesting that it could be an effective antitumor agent.
引用
收藏
页数:13
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