A Randomized, Double-Blind, Placebo-Controlled Dose-Escalation Study to Determine the Safety and Efficacy of Intravenous Infusion of Human Placenta-Derived Cells (PDA001) for the Treatment of Crohn's Disease

This is a randomized, double-blind, placebo-controlled, dose-escalation study to study 3 cohorts of subjects with Crohn's Disease including (but not limited to) those with colonic involvement. Each cohort (n = 9) will include PDA001 treated subjects (n = 6) as well as placebo (vehicle control) treated subjects (n = 3). Cohorts will be enrolled sequentially, beginning with the lowest dose cohort (1/4 unit PDA001) and progressing until the maximum tolerated dose of IV PDA001 is determined.