06/03/2026
A single-dose cure has arrived for HAT (human African trypanosomiasis). A benzoxaborole, acoziborole is a reversibly-covalent binder of CPSF3 in Trypanosoma parasites that leaves human CPSF3 untouched. The compound’s late-stage optimization helped tune compound CNS exposure, resulting in a PK profile that delivered a 100% cure rate in a CNS mouse infection model.
Acoziborole delivered a 95% cure rate in a Ph. 2/3 trial as an oral 960 mg single-dose, curing patients in both early- and late-stage disease–differentiating itself from the other completely oral sleeping sickness regimen, fexinidazole, which is ineffective in severe stage 2 infections.
Following fexinidazole’s 2018 approval, acoziborole is the second fully oral treatment for HAT and the first single-dose cure. The drug received a positive scientific opinion from the EMA in February 2026 and awaits formal registration in endemic countries.
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