Antimalarial, Antitrypanosomal, and Antileishmanial Activities and Cytotoxicity of Bis(9-amino-6-chloro-2-methoxyacridines): Influence of the Linker
摘要:
Forty bis(9-amino-6-chloro-2-methoxyacridines), in which acridine moieties are joined by alkanediamines, polyamines, or polyamines substituted by a side chain, were synthesized and tested for their in vitro activity upon the erythrocytic stage of Plasmodium falciparum, trypomastigote stage of Trypanosoma brucei, and amastigote stage of Trypanosoma cruzi and Leishmania infantum as well as for their cytotoxic effects upon MRC-5 cells. Results clearly showed the importance of the nature of the linker and of its side chain for antiparasitic activity, cytotoxicity, and cellular localization. Among several compounds devoid of cytotoxic effects at 25 mu M upon MRC-5 cells, one displayed IC50 values ranging from 8 to 18 nM against different P. falciparum strains while three others totally inhibited T. brucei at 1.56 mu M.
spacered dimericacridinecompounds was prepared. Their ability to interrupt the protein association of prion‐ and Alzheimer‐specific proteins and Ab peptides was explored using a fast screening system based on FACS analysis. The bis‐acridines displayed a higher activity than the corresponding monomers. Among these derivatives, best results were obtained with the 2,4‐dimethoxy‐6‐nitro compound 7h for