Just shy of four years ago, MEI Pharma Inc. and Helsinn Group hashed out a $464 million deal to develop and commercialize pracinostat. Now an interim futility analysis has persuaded them to halt their phase III study in acute myeloid leukemia (AML) while, pending further evaluation, patients enrolled in other pracinostat studies continue their treatment.
The checkpoint molecule CD47 has high hopes riding on it in oncology as being the innate immune equivalent of PD-1. Multiple companies are developing blockers against CD47 and/or its ligand, SIRPa, for the treatment of various tumors.