Dmn. Gakunju et al., POTENT ANTIMALARIAL ACTIVITY OF THE ALKALOID NITIDINE, ISOLATED FROM A KENYAN HERBAL REMEDY, Antimicrobial agents and chemotherapy, 39(12), 1995, pp. 2606-2609
Bioassay-guided fractionation of extracts of Toddalia asiatica, a plan
t used by the Pokot tribe of Kenya to treat fevers, has yielded the al
kaloid nitidine as the major antimalarial component. Fractions contain
ing nitidine have in vitro 50% inhibitory concentrations against Plasm
odium falciparum in the range of 9 to 108 ng/ml for a range of chloroq
uine-susceptible and -resistant strains. The results show a lack of cr
oss-resistance between chloroquine and nitidine.