Allogeneic Regulatory Dendritic Cell (DCreg) Renal Study

This clinical trial is a single-center, open-label, dose-escalation, phase 1 study, enrolling N=14 de novo kidney transplant recipients and their respective living donors. The study objective is to evaluate the safety and feasibility of a single infusion of donor-derived regulatory dendritic cell (DCreg) treatment. Transplant recipients will receive combination immunosuppressive agents according to the site's Standard of Care (SOC) regimen, with two exceptions: * mycophenolic acid (MPA) will be initiated 7 days before transplant, at the time of donor DCreg infusion, instead of on the day of transplant; and * the pre-transplant dose of MPA will be half the standard post-transplant dose, due to increased drug bioavailability in recipients with low kidney function defined by glomerular filtration rate (GFR). Consequently, participants will be maintained on triple immunosuppressive therapy with MPA, tacrolimus, and prednisone after transplant, a combination regimen widely applied as SOC at many transplant centers in North America and worldwide. Note: Participants will not be withdrawn from known effective therapy for the purpose of participating in this research.