Study: NCT03617731

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Lenalidomide
Description: 25 mg per os on day 1-14 and d22-35 in induction cycle 1-3 (Arms IA and IB) 10 mg p.o. on day 1-28 in maintenance cycle 1-3, 15 mg p.o. on day 1-28 in maintenance cycle 4-39 (Arms IIA and IIB)

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Lenalidomide
Description: 25 mg per os on day 1-14 and d22-35 in induction cycle 1-3 (Arms IA and IB) 10 mg p.o. on day 1-28 in maintenance cycle 1-3, 15 mg p.o. on day 1-28 in maintenance cycle 4-39 (Arms IIA and IIB)

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Lenalidomide
Description: 25 mg per os on day 1-14 and d22-35 in induction cycle 1-3 (Arms IA and IB) 10 mg p.o. on day 1-28 in maintenance cycle 1-3, 15 mg p.o. on day 1-28 in maintenance cycle 4-39 (Arms IIA and IIB)

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Lenalidomide
Description: 25 mg per os on day 1-14 and d22-35 in induction cycle 1-3 (Arms IA and IB) 10 mg p.o. on day 1-28 in maintenance cycle 1-3, 15 mg p.o. on day 1-28 in maintenance cycle 4-39 (Arms IIA and IIB)

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Bortezomib
Description: all arms: 1,3 mg/m\^2 subcutaneous on day 1, 4, 8, 11, 22, 25, 29 32 in 3 induction cycles

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Bortezomib
Description: all arms: 1,3 mg/m\^2 subcutaneous on day 1, 4, 8, 11, 22, 25, 29 32 in 3 induction cycles

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Dexamethasone
Description: 20 mg per os on day 1,2 and 4,5 and 8,9 and 11,12 and 15 and 22,23 and 25,26 and 29,30 and 32,33 in induction cycles 1-3 (Arms IA and IB). Maintenance cycle 1 on day 1, 8, 15, 22 Dexamethasone 20 mg/d per os (Arm IIA). In Arm IIB Dexamethasone 20 mg i.v. on days of Isatuximab infusion in the first maintenance cycle (d 1, 8, 15, 22), dexamethasone will be administered intravenously as part of the premedication. If an isatuximab dose is skipped or discontinued dexamethasone should be administered orally.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Dexamethasone
Description: 20 mg per os on day 1,2 and 4,5 and 8,9 and 11,12 and 15 and 22,23 and 25,26 and 29,30 and 32,33 in induction cycles 1-3 (Arms IA and IB). Maintenance cycle 1 on day 1, 8, 15, 22 Dexamethasone 20 mg/d per os (Arm IIA). In Arm IIB Dexamethasone 20 mg i.v. on days of Isatuximab infusion in the first maintenance cycle (d 1, 8, 15, 22), dexamethasone will be administered intravenously as part of the premedication. If an isatuximab dose is skipped or discontinued dexamethasone should be administered orally.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Isatuximab
Description: 10 mg/kg in the vein( i.v) on day 1,8,15, 22, 29 in induction cycle 1 on day 1, 15 and 29 in induction cycle 2 and 3 (Arm IB). 10 mg/kg i.v. on day 1,8, 15 and 22 in maintenance cycle 1, 10 mg/kg i.v. on day 1 and 15 in maintenance cycle 2 and 3, 10 mg/kg i.v. on day 1 in maintenance cycle 4 - 39 (Arm IIB)

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Isatuximab
Description: 10 mg/kg in the vein( i.v) on day 1,8,15, 22, 29 in induction cycle 1 on day 1, 15 and 29 in induction cycle 2 and 3 (Arm IB). 10 mg/kg i.v. on day 1,8, 15 and 22 in maintenance cycle 1, 10 mg/kg i.v. on day 1 and 15 in maintenance cycle 2 and 3, 10 mg/kg i.v. on day 1 in maintenance cycle 4 - 39 (Arm IIB)