Healthy Subjects Clinical Trial
Official title:
A Proof-of-concept Study to Assess the Effect of ACT-451840 Against Early Plasmodium Falciparum Blood Stage Infection in Healthy Subjects
This was a single-center study using induced blood stage malaria infection to characterize the activity of ACT-451840 against early Plasmodium falciparum blood stage infection
The primary objective of the study was to characterize the activity of ACT-451840 administered orally on clearance of Plasmodium falciparum blood stage parasites from the blood in healthy subjects .The inoculum used for blood stage Plasmodium falciparum challenge (BSPC) contained an estimated 1,800 viable parasite-infected erythrocytes diluted into 2 mL of normal saline for injection. Blood was collected for malaria parasitemia assessment by polymerase chain reaction (PCR). Parasitemia ≥ 1,000 parasites/mL indicated that the subjects should be treated with ACT-451840 . If PCR counts were > 5,000 parasites/mL and symptomatic they were dosed within 24 hours. Subsequent PCR blood sampling were performed prior to ACT-451840 dosing and at 2, 4, 8, 12, 16, 20, 24, 30, 36, 48, 60, 72, 84, 96, 120, 144 hours post-dosing and then approximately times per week until 2 consecutive negative samples, until Riamet® rescue treatment and at the final visit. ;
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