Common dietary flavonoids inhibit the growth of the intraerythrocytic malaria parasite.

BMC Research Notes
Adele M Lehane, Kevin J Saliba

Abstract

Flavonoids are abundant plant phenolic compounds. More than 6000 have been identified to date, and some have been shown to possess antiparasitic activity. Here we investigate the effects of a range of common dietary flavonoids on the growth of two strains of the human malaria parasite Plasmodium falciparum. A chloroquine-sensitive (3D7) and a chloroquine-resistant (7G8) strain of P. falciparum were tested for in vitro susceptibility to a range of individual dietary flavonoids and flavonoid combinations. Parasite susceptibility was measured in 96-well plates over 96 h using a previously described [3H]hypoxanthine incorporation assay. Of the eleven flavonoids tested, eight showed antiplasmodial activity against the 3D7 strain (with IC50 values between 11 and 66 muM), and all showed activity against the 7G8 strain (with IC50 values between 12 and 76 muM). The most active compound against both strains was luteolin, with IC50 values of 11 +/- 1 muM and 12 +/- 1 muM for 3D7 and 7G8, respectively. Luteolin was found to prevent the progression of parasite growth beyond the young trophozoite stage, and did not affect parasite susceptibility to the antimalarial drugs chloroquine or artemisinin. Combining low concentrations of flavonoids ...Continue Reading

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