Related Experiment Video
Updated: Jul 10, 2026

Standard Membrane Feeding Assay for the Detection of Plasmodium falciparum Infection in Anopheles Mosquito Vectors
Published on: May 12, 2022
Specific pharmacokinetic interaction between lumefantrine and monodesbutyl-benflumetol in Plasmodium falciparum
Peter Starzengruber1, Gunther Wernsdorfer, Maria Parizek
1Institute of Specific Prophylaxis and Tropical Medicine, Center for Physiology and Pathophysiology, Medical University of Vienna, Vienna, Austria.
Abstract:
The blood schizontocidal activity of lumefantrine, monodesbutyl-benflumetol (DBB) and a 999:1 combination of both compounds has been investigated in 26 fresh isolates of Plasmodium falciparum from northwestern Thailand, using the WHO standard protocol Mark II for determining the inhibition of schizont maturation. The geometric mean cut-off concentrations of schizont maturation (GMCOC) were 943.2 nM for lumefantrine, 146.3 nM for DBB and 182.2 nM for the 999:1 combination of lumefantrine and DBB. The EC(50) values were 27.3 nM for lumefantrine, 5.7 nM for DBB, and 16.5 nM for the combination, and the EC(90) values 163.1 nM for lumefantrine, 44.1 nM for DBB, and 78.3 nM for the combination. Despite the very low concentration in the combination, DBB exerted significant synergistic activity with lumefantrine that was strongest at the EC(90) and EC(99) levels. Correlation analysis indicates that DBB is the leading determinant for the activity of the combination.
Related Concept Videos
Malaria
Nonlinear Pharmacokinetics: Dependence of Elimination Half-Life and Dose Clearance
A study on guinea pigs examined the...
Pharmacokinetics: Drug–Food and Drug–Viral Interactions
Pharmacokinetic–Pharmacodynamic Relationship: Duration of Dose-Effect Relationship
Pharmacokinetics: Drug–Drug Interactions
Effect of Hepatic Disease on Pharmacokinetics: Active Drug, Metabolite and Fraction of Metabolized Drug

