Up-front CART-BCMA With or Without huCART19 in High-risk Multiple Myeloma

The target dose for CART-BCMA and huCART19 will be 5x108 CAR-expressing cell for each product. Split dose infusions will consist of a 10% dose (of one or both products) on the first infusion day, 30% dose (of one or both products) on the second infusion day, or 60% dose (of one or both products) on the third infusion day. Infusion days may be spread over 7 calendar days due to scheduling constraints or to allow observation of suspected early cytokine release syndrome or other toxicity. Infusions will begin 3 days (+/- 1 day) after completion of lymphodepleting chemotherapy with cyclophosphamide + fludarabine.

The target dose for CART-BCMA and huCART19 will be 5x108 CAR-expressing cell for each product. Cohort 1 refers to the group of subjects assigned to receive CART-BCMA alone; Cohort 2 refers to the group of subjects assigned to receive CART-BCMA + huCART19. Split dose infusions will consist of a 10% dose (of one or both products) on the first infusion day, 30% dose (of one or both products) on the second infusion day, or 60% dose (of one or both products) on the third infusion day. Infusion days may be spread over 7 calendar days due to scheduling constraints or to allow observation of suspected early cytokine release syndrome or other toxicity. Infusions will begin 3 days (+/- 1 day) after completion of lymphodepleting chemotherapy with cyclophosphamide + fludarabine.

The target dose for CART-BCMA and huCART19 will be 5x108 CAR-expressing cell for each product. Cohort 1 refers to the group of subjects assigned to receive single dose infusions of CART-BCMA alone; Cohort 2 refers to the group of subjects assigned to receive single dose infusions of CART-BCMA + huCART19. Infusions will begin 3 days (+/- 1 day) after completion of lymphodepleting chemotherapy with cyclophosphamide + fludarabine.

The target dose for CART-BCMA and huCART19 will be 5x108 CAR-expressing cell for each product. Split dose infusions will consist of a 10% dose (of one or both products) on the first infusion day, 30% dose (of one or both products) on the second infusion day, or 60% dose (of one or both products) on the third infusion day. Infusion days may be spread over 7 calendar days due to scheduling constraints or to allow observation of suspected early cytokine release syndrome or other toxicity. Infusions will begin 3 days (+/- 1 day) after completion of lymphodepleting chemotherapy with cyclophosphamide + fludarabine.