Design, synthesis and biological evaluation of LBM-A5 derivatives as potent P-glycoprotein-mediated multidrug resistance inhibitors

  • Bioorg Med Chem. 2016 May 15;24(10):2287-97. doi: 10.1016/j.bmc.2016.03.065.
Yuxiang Wu  1 ,  Miaobo Pan  1 ,  Yuxuan Dai  1 ,  Baomin Liu  2 ,  Jian Cui  1 ,  Wei Shi  1 ,  Qianqian Qiu  1 ,  Wenlong Huang  3 ,  Hai Qian  4
Affiliations
  • 1. Center of Drug Discovery, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China.
  • 2. Center of Drug Discovery, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China; Nan Jing Research and Development Center, CTTQ Pharmaceutical Research Institute, Building 9, NO. 699-8, Xuanwu Dadao, Xuanwu District, Nanjing, Jiangsu, PR China.
  • 3. Center of Drug Discovery, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China. Electronic address: [email protected].
  • 4. Center of Drug Discovery, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China. Electronic address: [email protected].
PMID: 27073052 DOI: 10.1016/j.bmc.2016.03.065
Abstract

A novel series of P-glycoprotein (P-gp)-mediated multidrug resistance (MDR) inhibitors with triazol-N-phenethyl-tetrahydroisoquinoline or triazol-N-ethyl-tetrahydroisoquinoline scaffold were designed and synthesized via click chemistry. Most of the synthesized compounds showed higher reversal activity than verapamil (VRP). Among them, the most potent compound 4 showed a comparable activity with the known potent P-gp inhibitor WK-X-34 with lower cytotoxicity toward K562 cells (IC50>100μM). Compared with VRP, compound 4 exhibited more potency in increasing drug accumulation in K562/A02 MDR cells. Moreover, compound 4 could significantly reverse MDR in a dose-dependent manner and also persist longer chemo-sensitizing effect than VRP with reversibility. Further mechanism studies revealed that compound 4 could remarkably increase the intracellular accumulation of Adriamycin (ADM) in K562/A02 cells as well as inhibit rhodamine-123 (Rh123) efflux from the cells. These results suggested that compound 4 may represent a promising candidate for developing P-gp-mediated MDR inhibitors.

Keywords
Click chemistry; Multidrug resistance inhibitors; P-glycoprotein; Reversal activity.