title: In vitro susceptibility of P. falciparum populations from Colombia and Tanzania to a new synthetic peroxide (OZ277).
abstract: Sensitivity of Plasmodium falciparum populations from Colombia (N = 38) and Tanzania (N = 45) to the newly developed, fully synthetic peroxide OZ277 was investigated using a standard isotopic microtest. OZ277 showed excellent activity against chloroquine-resistant isolates in Colombia with median IC(50) [range] values of 2.5 ng/mL [0.34-8] (4.4 nM [0.6-14]) and Tanzania with 1.5 ng/mL [0.22-10] (2.65 nM [0.4-17.7]). The potency of OZ277 was similar to artesunate, showing median IC(50) values of 1.5 ng/mL [0.42-8.6] (3.8 nM [1.1-22.3]) and 1.8 ng/mL [0.2-10] (4.7 nM [0.5-26.04]) in Colombia and Tanzania, respectively. These results support the development of this new antimalarial compound.
authors.affiliation: International Center for Medical Research and Training CIDEIM, Cali, Colombia. lydaosorio@cideim.org.co
authors.forename: Lyda
authors.initials: L
authors.lastname: Osorio
authors.forename: Claribel
authors.initials: C
authors.lastname: Murillo
authors.forename: Samanda
authors.initials: S
authors.lastname: Aponte
authors.forename: Valeriana
authors.initials: V
authors.lastname: Mayagaya
authors.forename: Christian
authors.initials: C
authors.lastname: Scheurer
authors.forename: Reto
authors.initials: R
authors.lastname: Brun
authors.forename: Hugues
authors.initials: H
authors.lastname: Matile
authors.forename: Sergio
authors.initials: S
authors.lastname: Wittlin
mesh_terms: D000818:Animals; D000962:Antimalarials / Q000494:pharmacology*; D002648:Child; D002675:Child, Preschool; D003105:Colombia; D006573:Heterocyclic Compounds, 1-Ring / Q000494:pharmacology*; D006801:Humans; D007223:Infant; D020128:Inhibitory Concentration 50; D016778:Malaria, Falciparum / Q000469:parasitology*; D010545:Peroxides / Q000494:pharmacology*; D010963:Plasmodium falciparum / Q000187:drug effects* / Q000254:growth & development / Q000302:isolation & purification; D013141:Spiro Compounds / Q000494:pharmacology*; D013636:Tanzania
chemical_list: D000962:Antimalarials; D006573:Heterocyclic Compounds, 1-Ring; D010545:Peroxides; D013141:Spiro Compounds; C489136:arterolane