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In vitro and in vivo antiplasmodial activities of risedronate and its interference with protein prenylation in Plasmodium falciparum.


ABSTRACT: The increasing resistance of malarial parasites to almost all available drugs calls for the identification of new compounds and the detection of novel targets. Here, we establish the antimalarial activities of risedronate, one of the most potent bisphosphonates clinically used to treat bone resorption diseases, against blood stages of Plasmodium falciparum (50% inhibitory concentration [IC50] of 20.3±1.0 ?M). We also suggest a mechanism of action for risedronate against the intraerythrocytic stage of P. falciparum and show that protein prenylation seems to be modulated directly by this drug. Risedronate inhibits the transfer of the farnesyl pyrophosphate group to parasite proteins, an effect not observed for the transfer of geranylgeranyl pyrophosphate. Our in vivo experiments further demonstrate that risedronate leads to an 88.9% inhibition of the rodent parasite Plasmodium berghei in mice on the seventh day of treatment; however, risedronate treatment did not result in a general increase of survival rates.

SUBMITTER: Jordao FM 

PROVIDER: S-EPMC3088194 | biostudies-literature | 2011 May

REPOSITORIES: biostudies-literature

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In vitro and in vivo antiplasmodial activities of risedronate and its interference with protein prenylation in Plasmodium falciparum.

Jordão Fabiana Morandi FM   Saito Alexandre Yukio AY   Miguel Danilo Ciccone DC   de Jesus Peres Valnice V   Kimura Emília Akemi EA   Katzin Alejandro Miguel AM  

Antimicrobial agents and chemotherapy 20110228 5


The increasing resistance of malarial parasites to almost all available drugs calls for the identification of new compounds and the detection of novel targets. Here, we establish the antimalarial activities of risedronate, one of the most potent bisphosphonates clinically used to treat bone resorption diseases, against blood stages of Plasmodium falciparum (50% inhibitory concentration [IC50] of 20.3±1.0 μM). We also suggest a mechanism of action for risedronate against the intraerythrocytic sta  ...[more]

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