Alkyne-, azide- and triazole-containing flavonoids as modulators for multidrug resistance in cancers
申请人:The Hong Kong Polytechnic University
公开号:US10208025B2
公开(公告)日:2019-02-19
A triazole bridged flavonoid dimer compound library was efficiently constructed via the cycloaddition reaction of a series of flavonoid-containing azides (Az 1-15) and alkynes (Ac 1-17). These triazole bridged flavonoid dimers and their precursor alkyne- and azide-containing flavonoids were screened for their ability to modulate multidrug resistance (MDR) in P-gp-overexpressed cell line (LCC6MDR), MRP1-overexpressed cell line (2008/MRP1) and BCRP-overexpressed cell line (HEK293/R2 and MCF7-MX100). Generally, they displayed very promising MDR reversal activity against P-gp-, MRP1- and BCRP-mediated drug resistance. Moreover, they showed different levels of selectivity for various transporters. Overall, they can be divided into mono-selective, dual-selective and multi-selective modulators for the P-gp, MRP1 and BCRP transporters. The EC50 values for reversing paclitaxel resistance (141-340 nM) of LCC6MDR cells, DOX (78-590 nM) and vincristine (82-550 nM) resistance of 2008/MRP1 cells and topotecan resistance (0.9-135 nM) of HEK293/R2 and MCF7-MX100 cells were at nanomolar range. Importantly, a number of compounds displayed EC50 at or below 10 nM in BCRP-overexpressed cell lines, indicating that these bivalent triazoles more selectively inhibit BCRP transporter than the P-gp and MRP1 transporters. Most of the dimers are notably safe MDR chemosensitizers as indicated by their high therapeutic index values.
通过一系列含类黄酮的叠氮化物(Az 1-15)和炔烃(Ac 1-17)的环加成反应,有效地构建了三唑桥接类黄酮二聚体化合物库。研究人员筛选了这些三唑桥接类黄酮二聚体及其前体炔烃和叠氮化物类黄酮在P-gp过表达细胞系(LCC6MDR)、MRP1过表达细胞系(2008/MRP1)和BCRP过表达细胞系(HEK293/R2和MCF7-MX100)中调节多药耐药性(MDR)的能力。总体而言,它们对 P-gp、MRP1 和 BCRP 介导的耐药性表现出非常好的 MDR 逆转活性。此外,它们对各种转运体表现出不同程度的选择性。总的来说,它们可分为针对 P-gp、MRP1 和 BCRP 转运体的单选择性、双选择性和多选择性调节剂。这些化合物逆转 LCC6MDR 细胞紫杉醇耐药性(141-340 nM)、2008/MRP1 细胞 DOX 耐药性(78-590 nM)和长春新碱耐药性(82-550 nM)以及 HEK293/R2 和 MCF7-MX100 细胞拓扑替康耐药性(0.9-135 nM)的 EC50 值均在纳摩尔范围内。重要的是,一些化合物在BCRP过表达细胞系中的EC50达到或低于10 nM,表明这些二价三唑类化合物对BCRP转运体的抑制作用比对P-gp和MRP1转运体的抑制作用更具选择性。大多数二聚物的治疗指数值都很高,表明它们是安全的 MDR 化疗增敏剂。