Daratumumab, VELCADE (Bortezomib), Lenalidomide and Dexamethasone Compared to VELCADE, Lenalidomide and Dexamethasone in Subjects With Previously Untreated Multiple Myeloma

Daratumumab will be given at a dose of 1800 mg SC weekly in Cycles 1 and 2, then every 2 weeks in Cycles 3-6. In maintenance Cycles 7+, subjects will receive daratumumab once every 4 weeks until disease progression or unacceptable toxicity. MRD-negative subjects will stop daratumumab after sustained MRD negativity for 12 months \& after a min. of 24 months of maintenance. Daratumumab should be restarted at recurrence of MRD or confirmed loss of CR without disease progression.

Bortezomib will be given at a dose of 1.3 mg/m2 SC twice a week (Days 1, 4, 8, and 11) in Cycles 1-6; four 28-day induction cycles (Cycles 1 to 4), and two 28-day consolidation cycles (Cycles 5-6). Subjects will not receive bortezomib after Cycle 6. On treatment days when both bortezomib and daratumumab are administered, bortezomib must be administered after the daratumumab administration.

Lenalidomide will be administered PO at 25 mg on Days 1 to 21 in Cycles 1-6; four 28-day induction cycles and two 28-day consolidation cycles. Following consolidation, subjects will then start maintenance therapy, during which they will receive lenalidomide 10 mg daily PO on Days 1 to 28 (continuously) of each 28-day cycle until disease progression or unacceptable toxicity. After 3 cycles of maintenance therapy, if well tolerated, the lenalidomide dose may be increased to 15 mg daily, at the discretion of the investigator.

Dexamethasone will be administered PO at 40 mg daily on Days 1-4 and Days 9-12 of each 28-day cycle during induction and consolidation (Cycles 1-6). On daratumumab administration days, during induction/consolidation, dexamethasone may be administered intravenously 1 hour before the daratumumab administration. On days when daratumumab is not administered, dexamethasone is administered PO. Dexamethasone tablets are to be taken with or immediately after a meal or snack, preferably in the morning.