Abstract:
:We have previously shown that structural modification of chlorpromazine to introduce a basic side chain converts this chloroquine (CQ) resistance-reversing agent into a compound that has activity against Plasmodium falciparum in vitro. In an effort to further dissect the structural features that determine quinoline antimalarial activity and drug resistance-reversing activity, we have studied a series of aminoquinolines that are structurally related to CQ. We have analysed their haematin-binding activities, their antimalarial activities and their abilities to synergise the effect of CQ against drug-resistant P. falciparum. We found that a number of the aminoquinolines were able to interact with haematin but showed no or very weak antiparasitic activity. Interestingly, 4-amino-7-chloroquinoline, which is the CQ nucleus without the basic side chain, was able to act as a resistance-reversing agent. These studies point to structural features that may determine the resistance-modulating potential of weakly basic amphipaths. Interestingly, 4-amino-7-chloroquinoline is a metabolic breakdown product of CQ and may contribute to CQ activity against resistant parasites in vivo.
journal_name
Biochem Pharmacoljournal_title
Biochemical pharmacologyauthors
Kalkanidis M,Klonis N,Tschan S,Deady LW,Tilley Ldoi
10.1016/j.bcp.2003.12.005subject
Has Abstractpub_date
2004-04-01 00:00:00pages
1347-53issue
7eissn
0006-2952issn
1873-2968pii
S0006295203009432journal_volume
67pub_type
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