SJ733 Induced Blood Stage Malaria Challenge Study

(+)-SJ000557733 (SJ733), in short SJ733, will be the second PfATP4 inhibitor to enter clinical development after KAE609 (Novartis) which is currently in Phase 2 stage. KAE609 (cipargamin; previously known as NITD609) is a spirotetrahydro-β-carbolines (spiroindolone). KAE609 inhibits QP15C20\_SJ733\_Challenge Protocol\_v2.0\_26July2016 Page 28 of 110 PfATP4, which results in a disruption of parasite sodium homeostasis. Compared to KAE609, SJ733 has the potential to be a very fast acting, antimalarial drug for human therapeutic application and may have a different safety profile in human participants. Finally, SJ733 blocks parasite transmission in vivo at potencies close to those where it is efficacious in blood stages, indicating its potential for transmission blockade in humans.