The peroxide-containing antimalarial drug arteflene (Ro 42-1611) generates an alkyl radical after the reductive homolytic cleavage of the peroxide bond in the presence of a heme model Mn(II)(TPP). This alkyl radical has been trapped by TEMPO, and the different products of the reduction activation of arteflene have been characterized. These data suggest that, in these experimental conditions, arteflene is not a significant alkylating agent compared to artemisinin, a trioxane-containing antimalarial drug.
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http://dx.doi.org/10.1021/jo990744z | DOI Listing |
J Org Chem
September 1999
Laboratoire de Chimie de Coordination du CNRS, 205 route de Narbonne, 31077 Toulouse Cedex 4, France.
Antimicrob Agents Chemother
October 2000
Laboratoire d'Immunologie et Parasitologie, UFR Sciences Pharmaceutiques, F-34060 Montpellier Cedex 2, France.
The in vitro potentiation of artemisinin by synthetic manganese porphyrin complexes has been recently reported (F. Benoit-Vical, A. Robert, and B.
View Article and Find Full Text PDFJ Pharmacol Exp Ther
April 1999
Department of Pharmacology and Therapeutics, University of Liverpool, Liverpool, United Kingdom.
Ro 42-1611 (arteflene) is a synthetic endoperoxide antimalarial. The antimalarial activity of endoperoxides is attributed to iron(II)-mediated generation of carbon-centered radicals. An alpha, beta-unsaturated ketone (enone; 4-[2',4' bis(trifluoromethyl)phenyl]-3-buten-2-one), obtained from arteflene by reaction with iron(II), was identified previously as the stable product of a reaction that, by inference, also yields a cyclohexyl radical.
View Article and Find Full Text PDFDiagn Microbiol Infect Dis
October 1996
Medical Microbiology Division, University of Iowa College of Medicine, Iowa City, 52242, USA.
Antibacterial agents are often used in malarial endemic areas for antimalarial prophylaxis (such as doxycycline and clindamycin). Gonococcal infections may coexist in the same geographic area, thus becoming suppressed by compounds directed toward malarial parasites. We tested 11 drugs with activity for Plasmodium species against 105 Neisseria gonorrhoeae strains.
View Article and Find Full Text PDFTrop Med Parasitol
June 1995
Dept. of Infectious Diseases, University Hospital (Rigshospitalet), University of Copenhagen, Denmark.
The purpose of this study was to investigate the ability of the antimalarial drug, Ro 42-1611 to block parasite mediated cytokine induction in vitro as well as cytoadherence of infected erythrocytes to melanoma cells in vitro. The biological activity of Ro 42-1611 was confirmed as it blocked Plasmodium falciparum growth in cultures. Ro 42-1611, had no major effect on TNF, IL-alpha or IL-6 cytokine release from mononuclear cells stimulated with malaria antigens or lipopolysaccharide and it did not affect cell viability.
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