DALY II USA/ MB-CART2019.1 for DLBCL

A prospective, single arm, open label, multi-center, phase II study of autologous T cells engineered against both CD19 and CD20 antigens for subjects with relapsed or refractory DLBCL after receiving at least two lines of therapy. The investigational agent is the MB-CART2019.1 cells. Additional cohorts include transplant-ineligible subjects with relapsed and/or refractory DLBCL after first-line therapy (i.e. DLBCL transplant-ineligible 2nd-line), r/r B-cell primary or secondary central nervous system (CNS) lymphoma (PCNSL) and (SCNSL), mantle cell lymphoma (MCL) and Richter's transformation (RT) after receiving at least one line of therapy. After successful screening, subjects will undergo leukapheresis to collect product for manufacturing. In preparation for the fresh product infusion, subjects will undergo a lymphodepleting regimen with cyclophosphamide and fludarabine, or bendamustine. Cell infusion will be administered intravenously at a dose of 2.5 x 106 CAR+ cells/kg body weight. The study will start with enrollment of 3 subjects in the lead-in safety phase, and after safety is evaluated, the study will continue with enrollment of the remaining subjects. Subjects will be followed for up to 2 years, for efficacy and safety outcomes as well as health-related quality of life (HRQol). Additional long-term follow-up will be conducted for participants under a separate long-term follow-up protocol.