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Title: Synergism between pyronaridine and retinol in Plasmodium falciparum in vitro
Authors: Pippa Proell
Kanungnit Congpuong
Franz F. Reinthaler
Gunther Wernsdorfer
Ursula Wiedermann
Walther H. Wernsdorfer
Medizinische Universitat Graz
Thailand Ministry of Public Health
Mahidol University
Medizinische Universitat Wien
Keywords: Medicine
Issue Date: 1-Oct-2009
Citation: Wiener Klinische Wochenschrift. Vol.121, No.SUPPL. 3 (2009), 32-36
Abstract: Pyronaridine, a naphthyridine derivative and Mannich base, is a highly active blood schizontocide and currently being explored as partner in artemisinin-based combination therapy (ACT). In this study, carried out 2008 in Mae Sot, Thailand, the activity of pyronaridine was found to be compromised, obviously as the result of mono-therapy in an adjacent area. The pyronaridine sensitivity and the interaction between pyronaridine and retinol at concentrations corresponding to the 50th, 65thand 80thpercentile of the physiological retinol levels in healthy adults were assessed in 38 fresh isolates of P. falciparum. The mean IC50, IC90 and IC99 values for pyronaridine were 12.7, 201.4 and 3084.2 nM, those for pyronaridine + retinol "low" 1.2, 14.0 and 102.6 nM, those for pyronaridine + retinol "medium" 0.6, 7.4 and 54.8 nM, and those for pyronaridine + retinol "high" 0.9, 8.2 and 47.8 nM. There was significant evidence of strong synergism between pyronaridine and retinol against P. falciparum. © 2009 Springer-Verlag.
ISSN: 00435325
Appears in Collections:Scopus 2006-2010

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