Fosmidomycin, a novel chemotherapeutic agent for malaria.

Antimicrobial Agents and Chemotherapy
Bertrand LellPeter G Kremsner

Abstract

In previous studies, fosmidomycin has been shown to possess activity against Plasmodium falciparum in vitro and in the mouse model. It has a novel mode of action through inhibition of 1-deoxy-D-xylulose 5-phosphate reductoisomerase, an enzyme of the nonmevalonate pathway of isoprenoid biosynthesis, which is absent in humans. In this open-label, uncontrolled trial, the efficacy and safety of fosmidomycin, in an oral dose of 1,200 mg every 8 h for 7 days, were evaluated in the treatment of acute uncomplicated Plasmodium falciparum malaria in 20 adult subjects in Gabon and Thailand. Clinical assessments were performed and thick blood smears were evaluated every 8 h until parasite clearance and resolution of symptoms were achieved; assessments continued at weekly intervals thereafter for the duration of the 28-day followup period. All subjects were clinically and parasitologically cured on day 7 (primary end point). Parasite and fever clearance were rapid, with means of 44 and 41 h, respectively. On day 28, seven out of nine subjects (78%) were cured in Gabon and two out of nine subjects (22%) were cured in Thailand. The drug was well tolerated, although mild gastrointestinal side effects were recorded for five subjects. Analysis o...Continue Reading

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