期刊
CHEMMEDCHEM
卷 7, 期 4, 页码 587-605出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cmdc.201100554
关键词
aminoacridines; antiparasitic agents; malaria; Plasmodium falciparum; topoisomerases; ss-hematin
资金
- Ministere de l'Education Nationale et de la Recherche Scientifique
- Marie Curie actions-Research Training Networks (SOLAR) [33499]
New N-alkylaminoacridine derivatives attached to nitrogen heterocycles were synthesized, and their antimalarial potency was examined. They were tested in vitro against the growth of Plasmodium falciparum, including chloroquine (CQ)-susceptible and CQ-resistant strains. This biological evaluation has shown that the presence of a heterocyclic ring significantly increases the activity against P. falciparum. The best compound shows a nanomolar IC50 value toward parasite proliferation on both CQ-susceptible and CQ-resistant strains. The antimalarial activity of these new acridine derivatives can be explained by the two mechanisms studied in this work. First, we showed the capacity of these compounds to inhibit heme biocrystallization, a detoxification process specific to the parasite and essential for its survival. Second, in our search for alternative targets, we evaluated the in vitro inhibitory activity of these compounds toward Sulfolobus shibatae topoisomerase VI-mediated DNA relaxation. The preliminary results obtained reveal that all tested compounds are potent DNA intercalators, and significantly inhibit the activity of S. shibatae topoisomerase VI at concentrations ranging between 2.0 and 2.5 mu M.
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