First-in-Human Study of an Oral Plasmodium Falciparum Plasma Membrane Protein Inhibitor

Summary

Malaria is an infectious disease caused by a parasite that is passed to humans when an infected mosquito bites a person. About 3.4 billion people live in areas of the world where malaria is regularly found. In many countries, malaria is one of the leading causes of illness and death. Despite this, there are a limited number of drugs, called antimalarials, that can be used to treat malaria and increasing reports of resistance to existing antimalarials. The purpose of this research study is to test a new experimental antimalarial drug called SJ733 to first assess its safety, tolerability and blood levels in healthy adult volunteers. Single-dose, multi-dose and boosted-dose cohorts (both single and multi-dose) will be studied. The pharmacoenhancer (booster), cobicistat, will be given in combination with SJ733 in the boosted dose-cohorts. PRIMARY OBJECTIVES: * To assess the preliminary safety and tolerability of escalating doses of antimalarial SJ733 in healthy human volunteers. * To investigate the pharmacokinetic (PK) profile of escalating doses of antimalarial SJ733 and its metabolite in healthy human volunteers. * To identify a dose of SJ733 that can be tested in a separate Phase 1b human malaria challenge study. * To assess the preliminary safety and tolerability of SJ733 in healthy adult volunteers after multiple oral dosing. * To assess the pharmacokinetics of SJ733 and its metabolite SJ506 after multiple dosing of SJ733 in healthy adult volunteers. * To assess the preliminary safety and tolerability of escalating single oral doses of SJ733 in combination with cobicistat among healthy adult volunteers. * To assess the pharmacokinetics of SJ733 and its metabolite SJ506 after single oral doses of SJ733 in combination with cobicistat among healthy adult volunteers. * To assess the preliminary safety and tolerability of SJ733 in combination with cobicistat in healthy adult volunteers after multiple oral dosing. * To assess the pharmacokinetics of SJ733 and its metabolite SJ506 after multiple dosing of SJ733 in combination with cobicistat among healthy volunteers. SECONDARY OBJECTIVE: * To assess the impact of food intake on the pharmacokinetic profile of antimalarial SJ733.

Timeline

Start

2016-03-01

Primary completion

2018-03-09

Completion

2018-03-09

Publications

• Gaur AH, Panetta JC, Smith AM, Dallas RH, Freeman BB 3rd, Stewart TB, Tang L, John E, Branum KC, Patel ND, Ost S, Heine RN, Richardson JL, Hammill JT, Bebrevska L, Gusovsky F, Maki N, Yanagi T, Flynn PM, McCarthy JS, Chalon S, Guy RK. Combining SJ733, an oral ATP4 inhibitor of Plasmodium falciparum, with the pharmacokinetic enhancer cobicistat: An innovative approach in antimalarial drug development. EBioMedicine. 2022 Jun;80:104065. doi: 10.1016/j.ebiom.2022.104065. Epub 2022 May 19.
• Gaur AH, McCarthy JS, Panetta JC, Dallas RH, Woodford J, Tang L, Smith AM, Stewart TB, Branum KC, Freeman BB 3rd, Patel ND, John E, Chalon S, Ost S, Heine RN, Richardson JL, Christensen R, Flynn PM, Van Gessel Y, Mitasev B, Mohrle JJ, Gusovsky F, Bebrevska L, Guy RK. Safety, tolerability, pharmacokinetics, and antimalarial efficacy of a novel Plasmodium falciparum ATP4 inhibitor SJ733: a first-in-human and induced blood-stage malaria phase 1a/b trial. Lancet Infect Dis. 2020 Aug;20(8):964-975. doi: 10.1016/S1473-3099(19)30611-5. Epub 2020 Apr 8.

Drugs

Indications