The effect of a thieno[2,3-b]pyridine PLC-γ inhibitor on the proliferation, morphology, migration and cell cycle of breast cancer cells
作者:Euphemia Leung、Joy M. Hung、David Barker、Jóhannes Reynisson
DOI:10.1039/c3md00290j
日期:——
3-Amino-N-(3-chlorophenyl)-5-oxo-5,6,7,8-tetrahydrothieno[2,3-b]quinoline-2-carboxamide (compound 1) is a putative phosphoinositide specific-phospholipase C-γ (PLC-γ) enzyme inhibitor. This enzyme is a plausible anticancer target linked to cell motility, important for the invasion and dissemination of tumour cells. In this work it is shown that IC50 values of compound 1 are in the low nanomolar range against a host of breast cancer cell lines as a consequence of anti-proliferative activity. These results correlate well with previously published results (Feng et al., Eur. Med. Chem., 54, 2012, 463â469) on tumour cell viability confirming the efficacy of compound 1. Flow cytometry experiments revealed that compound 1 arrests the cell cycle in the G2/M phases. Furthermore, the morphology and cell migration for the MDA-MB-231 breast cancer cell line are severely affected by administration of compound 1, which fits the hypothesis of PLC-γ inhibition. Finally, a detailed docking study against PLC reveals that the side chains of the amino acids His356, Glu341, Arg549 and Lys438 are involved in hydrogen bonding with ligand 1 as well as a lipophilic pocket is occupied by the phenyl moiety. The results presented in this study are particularly interesting because compound 1 affects triple-negative breast cancer cells, which are difficult to treat in the clinic and are in a dire need for an effective targeted therapy. We believe that compound 1 and its thieno[2,3-b]pyridine derivatives demonstrate that such a therapy can be developed.
3-氨基-N-(3-氯苯基)-5-氧代-5,6,7,8-四氢噻吩并[2,3-b]喹啉-2-甲酰胺(化合物 1)是一种假定的磷脂酶 Cδ³(PLC-δ³)酶抑制剂。这种酶是一种与细胞运动有关的抗癌靶点,对肿瘤细胞的侵袭和扩散非常重要。这项研究表明,由于化合物 1 具有抗增殖活性,它对多种乳腺癌细胞株的 IC50 值都在低纳摩尔范围内。这些结果与之前发表的关于肿瘤细胞活力的结果(Feng 等,《欧洲医药化学》,54,2012,463-469)密切相关,证实了化合物 1 的功效。 流式细胞仪实验显示,化合物 1 能使细胞周期停滞在 G2/M 阶段。此外,服用化合物 1 会严重影响 MDA-MB-231 乳腺癌细胞系的形态和细胞迁移,这符合 PLC-γ 抑制作用的假设。最后,针对 PLC 的详细对接研究显示,氨基酸 His356、Glu341、Arg549 和 Lys438 的侧链参与了与配体 1 的氢键结合,苯基分子还占据了一个亲油性口袋。本研究的结果特别有趣,因为化合物 1 能影响三阴性乳腺癌细胞,而这种细胞在临床上很难治疗,急需一种有效的靶向疗法。我们相信,化合物 1 及其噻吩并[2,3-b]吡啶衍生物证明这种疗法是可以开发出来的。