Regulatory & Program Update

The Company has completed a Type C meeting with the FDA to seek guidance on key elements of a future registrational trial of PBFT02 for FTD-GRN patients. Based on the feedback received, the FDA has indicated that a randomized controlled registrational study design is required for PBFT02 in this indication. A randomized controlled registrational trial poses substantial ethical concerns for patients and their families as well as logistical and financial challenges. As such, the Company is evaluating potential next steps in the clinical development of PBFT02 in FTD-GRN and FTD-C9orf72 in the upliFT-D trial.