title: A Pharmacokinetic Study of Antimalarial 3,5-Diaryl-2-aminopyridine Derivatives.
abstract: Malaria caused by Plasmodium falciparum is responsible for approximately 80% of the incidence and 90% of deaths which occur in the World Health Organization (WHO) African region, with children and pregnant women having the highest incidence. P. falciparum has developed resistance, and therefore new effective candidate antimalarial drugs need to be developed. Previous studies identified 3,5-diaryl-2-aminopyridines as potential antimalarial drug candidates; therefore, derivatives of these compounds were synthesized in order to improve their desired properties and pharmacokinetic (PK) properties of the derivatives were investigated in a mouse model which was dosed orally and intravenously. Collected blood samples were analyzed using liquid chromatography coupled to mass spectrometer (LC-MS/MS). The mean peak plasma level of 1.9 μM was obtained at 1 hour for compound 1 and 3.3 μM at 0.5 hours for compound 2. A decline in concentration was observed with a half-life of 2.53 and 0.87 hours for compound 1 in mice dosed orally and intravenously, respectively. For compound 2 a half-life of 2.96 and 0.68 hours was recorded. The bioavailability was 69% and 59.7% for compound 1 and compound 2, respectively.
authors.affiliation: Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Observatory, Cape Town 7925, South Africa.
authors.forename: Ntokozo
authors.initials: N
authors.lastname: Dambuza
authors.affiliation: Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Observatory, Cape Town 7925, South Africa.
authors.forename: Peter
authors.initials: P
authors.lastname: Smith
authors.affiliation: Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Observatory, Cape Town 7925, South Africa.
authors.forename: Alicia
authors.initials: A
authors.lastname: Evans
authors.affiliation: Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Observatory, Cape Town 7925, South Africa.
authors.forename: Dale
authors.initials: D
authors.lastname: Taylor
authors.affiliation: Department of Chemistry, University of Cape Town, Rondebosch, Cape Town 7700, South Africa.
authors.forename: Kelly
authors.initials: K
authors.lastname: Chibale
authors.affiliation: Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Observatory, Cape Town 7925, South Africa.
authors.forename: Lubbe
authors.initials: L
authors.lastname: Wiesner