Abstract:
:We have investigated a series of novel 4-aminoquinoline analogues related to amodiaquine, that possess side chain modifications designed to influence both drug pKa and lipophilicity. These compounds have been used to determine the influence of physicochemical properties on antimalarial activity against, and accumulation by, both chloroquine-susceptible and chloroquine-resistant isolates of Plasmodium falciparum. The compounds tested exhibited a 500-fold range of absolute antimalarial potency. Absolute drug potency and drug accumulation were found to be significantly correlated in each of the four isolates of Plasmodium falciparum studied. The level of accumulation was unrelated to lipophilicity and was significantly greater than the predicted levels of accumulation based on drug pKa, compartmental pH, and Henderson-Hasselbach considerations. Further analysis of the relationship between 4-aminoquinoline accumulation and activity implicated the involvement of additional forces in the accumulation process.
journal_name
Biochem Pharmacoljournal_title
Biochemical pharmacologyauthors
Hawley SR,Bray PG,O'Neill PM,Park BK,Ward SAdoi
10.1016/0006-2952(96)00354-1subject
Has Abstractpub_date
1996-09-13 00:00:00pages
723-33issue
5eissn
0006-2952issn
1873-2968pii
0006-2952(96)00354-1journal_volume
52pub_type
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