title: Enantiomeric 1,2,4-trioxanes display equivalent in vitro antimalarial activity versus Plasmodium falciparum malaria parasites: implications for the molecular mechanism of action of the artemisinins.
abstract: The aim of this study was to synthesise pure enantiomers of potent antimalarial 1,2,4-trioxanes, which are related to the natural antimalarial artemisinin, and then to assay each against a panel of Plasmodium falciparum strains. The working hypothesis was that if the artemisinin derivatives interact with a specific protein-target site, then there should be stereoselective differences in their activity. In five different P. falciparum isolates, however, the trioxane enantiomers (+)-7 a, (-)-7 a and (+)-7 b, (-)-7 b, showed the same level of in vitro antiparasitic activity.
authors.affiliation: Department of Chemistry, University of Liverpool, The Robert Robinson Laboratories, Oxford Street, Liverpool, L69 7ZD, UK. p.m.oneill01@liv.ac.uk
authors.forename: Paul M
authors.initials: PM
authors.lastname: O'Neill
authors.forename: Sarah L
authors.initials: SL
authors.lastname: Rawe
authors.forename: Kristina
authors.initials: K
authors.lastname: Borstnik
authors.forename: Alison
authors.initials: A
authors.lastname: Miller
authors.forename: Stephen A
authors.initials: SA
authors.lastname: Ward
authors.forename: Patrick G
authors.initials: PG
authors.lastname: Bray
authors.forename: Jill
authors.initials: J
authors.lastname: Davies
authors.forename: Chang Ho
authors.initials: CH
authors.lastname: Oh
authors.forename: Gary H
authors.initials: GH
authors.lastname: Posner
mesh_terms: D000818:Animals; D000962:Antimalarials / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D037621:Artemisinins / Q000378:metabolism / Q000494:pharmacology*; D015195:Drug Design; D006571:Heterocyclic Compounds / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D020128:Inhibitory Concentration 50; D015394:Molecular Structure; D021261:Parasitic Sensitivity Tests; D010963:Plasmodium falciparum / Q000187:drug effects*; D013237:Stereoisomerism
chemical_list: C503429:1,2,4-trioxane; D000962:Antimalarials; D037621:Artemisinins; D006571:Heterocyclic Compounds