作者:Jean Jacques Vanden Eynde、Annie Mayence、Melissa T. Johnson、Tien L. Huang、Margaret S. Collins、Sandra Rebholz、Peter D. Walzer、Melanie T. Cushion、Isaac O. Donkor
DOI:10.1007/s00044-005-0130-2
日期:2005.4
Among a library of 17 bisbenzamidines connected with various linkers, compounds with a flexible pentanediamide (10) or hexanediamide (12) linker were the most potent derivatives against rat Pneumocystis carinii (IC50 values of 3 and 2 nM, respectively) and had the highest selectivity index ratios (GI(50) of human tumor cells/IC50 of rat P. carinii cells) of > 10(4). Seven compounds caused 50% growth inhibition (GI(50)) of tumor cells at concentrations of < 100 mu M while the remaining ten were not cytotoxic. DNA binding affinity (Delta T-m) of the tested compounds did not correlate with either their anti-P. carinii activity or cytotoxicity.