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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
immunology and microbiology
Plasmodium berghei: Efficacy of 5-fluoroorotate in combination with commonly used antimalarial drugs in a mouse model
Experimental Parasitology, Volume 121, No. 4, Year 2009
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Description
Resistance to antimalarial antifolates necessitates a search for new antimetabolites targeting other enzymes of the folate metabolic pathway. In this study, 5-fluoroorotate (FOA), reported to be an inhibitor of thymidylate synthase, was assayed against Plasmodium berghei NK 65 in mice, with(out) an oral uridine supplement. FOA (2.5 and 5.0 mg/kg bw.) was tested alone, or in a double and triple combination with a fixed oral dose of 1.25 and 2.5 mg/kg of pyrimethamine (PYR); 1.0 and 2.0 mg/kg of dapsone (DAP); 1.0 and 2.0 mg/kg of artesunate (ART). FOA achieved high suppression which ranged from 95.7% to aparasitaemic, activity that was dose-dependent. At the highest dosages used, FOA-PYR and FOA-DAP-ART combinations were synergistic with 100% cure rate, while FOA-PYR-ART was antagonistic. Drugs in a synergistic combination may exert less resistance selection pressure, thus FOA-PYR and FOA-DAP-ART warrant further evaluation with an ultimate object of possible clinical use against drug-resistant malaria. © 2009 Elsevier Inc. All rights reserved.
Authors & Co-Authors
Muregi, Francis Wamakima
Japan, Hamamatsu
Hamamatsu University School of Medicine
Kenya, Nairobi
Kenya Medical Research Institute
Kano, Shigeyuki
Japan, Tokyo
National Center for Global Health and Medicine
Kino, Hideto
Japan, Hamamatsu
Hamamatsu University School of Medicine
Ishih, Akira
Japan, Hamamatsu
Hamamatsu University School of Medicine
Statistics
Citations: 11
Authors: 4
Affiliations: 3
Identifiers
Doi:
10.1016/j.exppara.2009.01.009
ISSN:
00144894
e-ISSN:
10902449
Research Areas
Health System And Policy
Infectious Diseases
Noncommunicable Diseases