New modification strategy of matrine as Hsp90 inhibitors based on its specific L conformation for cancer treatment
作者:Yiming Xu、Dewang Jing、Dong Zhao、Yongji Wu、Lu Xing、Haroon ur Rashid、Haodong Wang、Lisheng Wang、Huiling Cao
DOI:10.1016/j.bmc.2020.115305
日期:2020.2
The similarity of spatial structure between radicicol and matrine urged us to perform conformation modification of matrine, followed by L-shaped matrine derivatives, 6, 12, 21a-h and 22a-h were originally designed, synthesized and evaluated for Hsp90(N) inhibitors as anticancer agents. TSA (Thermal Shift Assay) results indicated that 21e, 22a-c and 22e-g exhibited strong binding force against Hsp90(N) with vertical bar Delta Tm vertical bar > 3, meanwhile, MTT assay also revealed these compounds displayed potent anticancer activity with IC50 values below 25 mu M against HepG2, HeLa and MDA-MB-231 cells lines. Then, compound 22g with a high Delta Tm = 10.92 was chosen as a representative to perform further mechanism study. It can induce cell apoptosis, arrest the cell cycle at the S phase and decrease the expression level of Hsp90 in Hela cell. These results originally provided targeted modification strategy for matrine derivatives to serve as Hsp90 inhibitors for cancer therapy.