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.
COMPOSITIONS AND METHODS RELATING TO HIV PROTEASE INHIBITION
申请人:Carlson Heather A.
公开号:US20110105477A1
公开(公告)日:2011-05-05
The present invention relates to HIV protease, and methods for inhibiting the function of HIV protease. In particular, present invention provides compounds that inhibit or block the biological activity of HIVp, thereby causing the replication of the HIV virus to be inhibited or to terminate. These compounds, as well as pharmaceutical compositions that contain these compounds and optionally other anti-viral agents as active ingredients, are suitable for treating patients or hosts infected with the HIV virus, which is known to cause AIDS. The compounds and formulations also find use in diagnostic and research settings.