Antitrypanosomal Activity of 1,2-Dihydroquinolin-6-ols and Their Ester Derivatives
摘要:
The current chemotherapy for second stage human African trypanosomiasis is unsatisfactory. A synthetic optimization study based on the lead antitrypanosomal compound 1,2-dihydro-2,2,4-trimethylquinolin-6-yl 3,5-dimethoxybenzoate (TDR20364, 1a) was undertaken in an attempt to discover new trypanocides with potent in vivo activity. While 6-ether derivatives were less active than the lead compound, several N1-substituted derivatives displayed nanomolar IC50 values against T. b. rhodesiense STIB900 in vitro, with selectivity indexes up to > 18000. 1-Benzyl-1, 2-dlhydro-2,2,4-trimethylquinolin-6-yl acetate (10a) displayed an IC50 value of 0.014 mu M against these parasites and a selectivity index or 1700. Intraperitoneal administration of 10a at 50 (mg/kg)/day for 4 days caused a promising prolongation of lifespan in T. b. brucei STIB795-infected mice (> 14 days vs 7.75 days for untreated controls). Reactive oxygen species were produced when T. b. brucei were exposed to 10a in vitro, implicating oxidative stress in the trypanocidal mode of action of these 1,2-dihydroquinoline derivatives.
Antitrypanosomal Activity of 1,2-Dihydroquinolin-6-ols and Their Ester Derivatives
摘要:
The current chemotherapy for second stage human African trypanosomiasis is unsatisfactory. A synthetic optimization study based on the lead antitrypanosomal compound 1,2-dihydro-2,2,4-trimethylquinolin-6-yl 3,5-dimethoxybenzoate (TDR20364, 1a) was undertaken in an attempt to discover new trypanocides with potent in vivo activity. While 6-ether derivatives were less active than the lead compound, several N1-substituted derivatives displayed nanomolar IC50 values against T. b. rhodesiense STIB900 in vitro, with selectivity indexes up to > 18000. 1-Benzyl-1, 2-dlhydro-2,2,4-trimethylquinolin-6-yl acetate (10a) displayed an IC50 value of 0.014 mu M against these parasites and a selectivity index or 1700. Intraperitoneal administration of 10a at 50 (mg/kg)/day for 4 days caused a promising prolongation of lifespan in T. b. brucei STIB795-infected mice (> 14 days vs 7.75 days for untreated controls). Reactive oxygen species were produced when T. b. brucei were exposed to 10a in vitro, implicating oxidative stress in the trypanocidal mode of action of these 1,2-dihydroquinoline derivatives.
Antitrypanosomal Activity of 1,2-Dihydroquinolin-6-ols and Their Ester Derivatives
作者:Jean Fotie、Marcel Kaiser、Dawn A. Delfín、Joshua Manley、Carolyn S. Reid、Jean-Marc Paris、Tanja Wenzler、Louis Maes、Kiran V. Mahasenan、Chenglong Li、Karl A. Werbovetz
DOI:10.1021/jm900723w
日期:2010.2.11
The current chemotherapy for second stage human African trypanosomiasis is unsatisfactory. A synthetic optimization study based on the lead antitrypanosomal compound 1,2-dihydro-2,2,4-trimethylquinolin-6-yl 3,5-dimethoxybenzoate (TDR20364, 1a) was undertaken in an attempt to discover new trypanocides with potent in vivo activity. While 6-ether derivatives were less active than the lead compound, several N1-substituted derivatives displayed nanomolar IC50 values against T. b. rhodesiense STIB900 in vitro, with selectivity indexes up to > 18000. 1-Benzyl-1, 2-dlhydro-2,2,4-trimethylquinolin-6-yl acetate (10a) displayed an IC50 value of 0.014 mu M against these parasites and a selectivity index or 1700. Intraperitoneal administration of 10a at 50 (mg/kg)/day for 4 days caused a promising prolongation of lifespan in T. b. brucei STIB795-infected mice (> 14 days vs 7.75 days for untreated controls). Reactive oxygen species were produced when T. b. brucei were exposed to 10a in vitro, implicating oxidative stress in the trypanocidal mode of action of these 1,2-dihydroquinoline derivatives.