作者: Timothy G. Geary , Alan D. Divo , James B. Jensen , Marina Zangwill , Hagai Ginsburg
DOI: 10.1016/0006-2952(90)90302-2
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摘要: The antimalarial mode of action chloroquine (CQ) has been investigated in great detail recent years, but the overall mechanism is still controversial. Instead further probing molecular aspects partial reactions, a model based on weak base properties CQ and its delta pH-driven accumulation acid parasite compartments devised, integrated response to drug under different experimental conditions assayed verify validity model. Factors such as inoculum size (parasitemia.hematocrit) medium pH were altered using CQ-sensitive (FCC1) -resistant (FCR3, VNS) isolates Plasmodium falciparum. Experimental results full agreement with predictions model, implying that therapeutic concentrations do not raise food vacuole, i.e. alkalinization an insufficient explanation for activity CQ, there no need invoke active QC efflux pump explain resistance. Calculations data demonstrate resistance correlated higher and/or intracellular target concentration vacuole. also have implications design interpretation vitro inhibitory tests.