Testing the Investigational Medication Combination of Daratumumab and Teclistamab Compared to the Usual Treatment (Daratumumab, Pomalidomide, Dexamethasone or Daratumumab, Carfilzomib, Dexamethasone) for Patients With High-risk Multiple Myeloma Refractory or in First Relapse

Phase 2

Not yet recruiting

• Conditions: Recurrent Multiple Myeloma; Refractory Multiple Myeloma
• Interventions: Procedure: Biospecimen Collection; Procedure: Bone Marrow Biopsy; Procedure: Computed Tomography; Drug: Carfilzomib; Drug: Daratumumab and Recombinant Human Hyaluronidase; Drug: Teclistamab; Drug: Dexamethasone; Procedure: FDG-Positron Emission Tomography; Drug: Pomalidomide

• Registration Number: NCT06948084
• Lead Sponsor: National Cancer Institute (NCI)

Brief Summary

This phase II trial compares the effect of the combination of daratumumab-hyaluronidase (daratumumab) and teclistamab to the usual treatment of daratumumab, pomalidomide, dexamethasone or daratumumab, carfilzomib and dexamethasone in treating patients with multiple myeloma that has not responded to previous treatment (refractory) or that has come back after a period of improvement (relapsed). Daratumumab is in a class of medications called monoclonal antibodies. It binds to a protein called CD38, which is found on some types of immune cells and cancer cells, including myeloma cells. Daratumumab may block CD38 and help the immune system kill cancer cells. Teclistamab is a bispecific antibody that can bind to two different antigens at the same time. Teclistamab binds to B-cell maturation antigen, a protein found on some B-cells and myeloma cells, and CD3 on T-cells (a type of white blood cell) and may interfere with the ability of cancer cells to grow and spread. Pomalidomide is in a class of medications called immunomodulatory agents. It works by helping the immune system kill cancer cells and by helping the bone marrow to produce normal blood cells. Dexamethasone is in a class of medications called corticosteroids. It is used to reduce inflammation and lower the body's immune response to help lessen the side effects of chemotherapy drugs. Carfilzomib, a type of proteasome inhibitor, blocks the action of enzymes called proteasomes, which may help keep cancer cells from growing and may kill them. Giving daratumumab and teclistamab may be more effective than the usual treatment of daratumumab, pomalidomide, dexamethasone or daratumumab, carfilzomib and dexamethasone in reducing myeloma cells to undetectable levels in patients with relapsed or refractory multiple myeloma.

Detailed Description

PRIMARY OBJECTIVE:

I. To determine whether patients with high-risk multiple myeloma (MM) that is refractory or in first relapse randomized to daratumumab and recombinant human hyaluronidase (daratumumab-hyaluronidase) in combination with teclistamab (DT) have superior efficacy measured by minimal residual disease (MRD)-negative status after 6 cycles of therapy compared to investigator's choice of daratumumab-hyaluronidase, pomalidomide and dexamethasone (DPd) or daratumumab-hyaluronidase, carfilzomib and dexamethasone (DKd).

SECONDARY CLINICAL OBJECTIVES:

I. To compare toxicity rates up to 6 cycles and overall on treatment between arms.

II. To compare progression-free and overall survival between arms. III. To evaluate best response per International Myeloma Working Group (IMWG) criteria after 6 cycles and overall on treatment.

IV. To evaluate safety and tolerability.

EXPLORATORY CLINICAL OBJECTIVES:

I. To evaluate treatment exposure and adherence. II. To evaluate time to progression and event free survival. III. To evaluate association of MRD-negative status after 6 cycles with best response per IMWG criteria and time to event outcomes.

EXPLORATORY THROMBOEMBOLISM RISK OBJECTIVES:

I. To estimate cumulative incidence of venous and arterial thromboembolic events.

II. To calculate IMPEDE and SAVED risk scores at baseline and at time of venous thromboembolic event.

III. To validate IMPEDE and SAVED risk stratification models. IV. To describe thromboprophylaxis strategies on treatment and assess the association with venous and arterial thromboembolic events.

V. To estimate incidence of clinically significant (major) bleeding events and assess association with thromboprophylaxis strategy.

VI. To assess the association of venous and arterial thromboembolic events and overall survival.

OUTLINE: Patients are randomized to 1 of 2 arms.

ARM A: Patients are assigned to 1 of 2 treatments per investigator's choice.

Treatment I (DPD): Patients receive daratumumab-hyaluronidase subcutaneously (SC) over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6, then on day 1 of subsequent cycles. Patients also receive pomalidomide orally (PO) on days 1-21 of each cycle, dexamethasone PO or intravenously (IV) on days 1, 8, 15, and 22 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.

Treatment II (DKD): Patients are assigned to 1 of 2 options for carfilzomib.

OPTION 1: Patients receive daratumumab-hyaluronidase SC over 3-5 minutes carfilzomib IV on days 1, 2, 8, 9, 15, and 16 of each cycle, and dexamethasone PO or IV on days 1, 2, 8, 9, 15, and 16 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.

OPTION 2: Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6 and on day 1 of subsequent cycles, carfilzomib IV on days 1, 8, and 15 of each cycle, and dexamethasone PO or IV on days 1, 8, 15, and 22 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.

ARM B:

Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6 and on day 1 of subsequent cycles. Patients also receive teclistamab SC on day 2, 4, 8, 15 and 22 of cycle 1, on days 1, 8, 15, and 22 of cycle 2, on days 1 and 15 of cycles 3-6 and then on day 1 of subsequent cycles. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.

Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and fludeoxyglucose F-18 (FDG) positron emission tomography (PET)/computed tomography (CT) throughout the study.

After completion of study treatment, patients are followed up every 3 months for up to year 2, every 6 months up to year 5 then yearly for up to 10 years from randomization.

Study Timeline

• Study First Submitted: 2025-04-26
• Study First Submitted QC: 2025-04-26
• Study First Posted: 2025-04-29
• Status Verified: 2025-05
• Last Update Submitted: 2025-05-06
• Last Update Posted: 2025-05-07
• Study Start: 2025-07-18
• Primary Completion: 2026-02-28
• Study Completion: 2026-02-28

Recruitment & Eligibility

• Status: NOT_YET_RECRUITING
• Sex: All
• Target Recruitment: 80

Inclusion Criteria

• Patient must be ≥ 18 years of age

• Patient must have an Eastern Cooperative Oncology Group (ECOG) performance status (PS) of 0-2 (PS 3 allowed if secondary to pain)

• Patient must have an identifiable dominant sequence (clonotype) established based on Adaptive Biotechnologies clonoSEQ® assay

• Patient must have received only one prior line of therapy

  • One prior line of systemic therapy is defined as 1 or more cycles of single agent or combination therapy, as well as a series of treatment regimens administered in a sequential manner (e.g., lenalidomide, bortezomib and dexamethasone induction therapy for 4 cycles followed by autologous stem cell transplantation and then lenalidomide +/- proteasome inhibitor or anti-CD38 monoclonal antibody (mAb) maintenance therapy would be considered 1 line of prior therapy)
  • NOTE: Autologous stem cell transplant is allowed provided the stem cell infusion was > 90 days prior to randomization. Allogeneic stem cell transplantation (SCT) patients are ineligible

• Patient must be diagnosed with relapsed or refractory (RR) multiple myeloma, as defined by disease progression, either an increase in serum or urine M protein of any level, or other evidence of progression biochemical or clinical as specified in the IMWG progression criteria (including disease which becomes non-responsive or progressive on therapy or within 60 days of the last treatment in patients who had achieved a partial response or better on prior therapy)

• Patient must be daratumumab-hyaluronidase (or isatuximab) naïve or daratumumab-hyaluronidase (or isatuximab) sensitive and > 180 days from their last dose of daratumumab-hyaluronidase (or isatuximab) at the time of randomization

• Patient must have high-risk multiple myeloma (HR-MM) as defined by one of the following either at diagnosis or at refractory status or at first relapse:

  • Evidence of deletion 17p by fluorescence in situ hybridization (FISH) testing on bone marrow
  • Evidence of t(4;14) by FISH testing on bone marrow
  • Evidence of t(14;16) by FISH testing on bone marrow
  • Evidence of t(14;20) by FISH testing on bone marrow
  • Evidence of chromosome 1 abnormalities either gain/amp 1q or deletion 1p by FISH testing on bone marrow OR
  • Evidence of non-hyperdiploid karyotype OR
  • Revised International Staging System (R-ISS) stage III beta2 microglobulin ≥ 5.5 mg/L and serum lactate dehydrogenase (LDH) > institutional upper limit of normal (ULN) OR
  • Patient in first relapse and ≤ 24 months from the start of induction for both allogeneic stem cell transplantation (ASCT) eligible or ASCT ineligible patients (regardless of FISH, cytogenetic or RISS stage)

• Patient must have measurable disease as defined by having one or more of the following, obtained within 28 days prior to randomization:

  • Serum M protein ≥ 0.5 g/dL (≥ 5 g/L)
  • Urine M protein ≥ 200 mg/24 hours
  • Serum free light chain (FLC) assay: Involved free light chain level ≥ 10 mg/dL (≥ 100 mg/L) provided serum FLC ratio is abnormal (< 0.26 or > 1.65)
  • Exception: patients without measurable disease in the serum or urine, but with bone or soft tissue plasmacytoma(s) ≥ 2 cm or who have bone marrow plasma cells ≥ 30% are eligible on study

• Patient must have serum protein electrophoresis (SPEP), urine protein electrophoresis (UPEP), and serum FLC assays along with bone marrow biopsy or aspirate performed within 28 days prior to randomization

  • NOTE: UPEP (on a 24 hour collection) is required, no substitute method is acceptable. Urine must be followed monthly if the baseline urine M-spike is ≥ 200 mg/24 hr. If both serum and urine M-components are measurable, both must be followed in order to confirm response
  • NOTE: The serum free light chain test is required to be done at each cycle

• Patient must not have any known allergies, hypersensitivity, or intolerance to corticosteroids, monoclonal antibodies or human proteins, or their excipients (refer to respective package inserts or investigator's brochure), or known sensitivity to mammalian-derived products

• Patients who have received prior systemic therapy for myeloma, including experimental therapy and steroids must have recovered from clinically significant adverse events prior to randomization

• Patient may not be on steroids (prednisone > 40mg/day or equivalent) at the time of randomization

• Patient may have received prior palliative and/or localized radiation, provided that it is completed by the time of randomization

• Absolute neutrophil count (ANC) ≥ 1,000/uL (=< 28 days prior to protocol randomization)

• Untransfused platelet count ≥ 50,000/uL (for patients with ≥ 50% plasma cells in the marrow) and untransfused platelet count > 75,000/uL (for patients with < 50% plasma cells in the marrow) (=< 28 days prior to protocol randomization)

• Untransfused hemoglobin ≥ 8.0 g/dL (=< 28 days prior to protocol randomization)

• Total bilirubin ≤ 1.5 x institutional ULN (upper limit of normal) (=< 28 days prior to protocol randomization)

• Aspartate aminotransferase (AST)(serum glutamic oxaloacetic transaminase [SGOT]) and alanine aminotransferase (ALT)(serum glutamic pyruvic transaminase [SGPT]) ≤ 3.0 × institutional ULN (=< 28 days prior to protocol randomization)

• Calculated creatinine clearance > 30 mL/min (=< 28 days prior to protocol randomization)

  • NOTE: Cockcroft-Gault equation should be used to calculate creatinine clearance

• Patient must not be pregnant or breast-feeding due to the potential harm to an unborn fetus and possible risk for adverse events in nursing infants with the treatment regimens being used

  • All patients of childbearing potential must have a blood test or urine study within 14 prior to randomization to rule out pregnancy. Patients randomized to Arm A and to receive the daratumumab-hyaluronidase, pomalidomide, dexamethasone (DPd) regimen must also have a second pregnancy test within 24 hours prior to the first dose of pomalidomide and agree to ongoing pregnancy testing while on protocol treatment
  • A patient of childbearing potential is defined as anyone, regardless of sexual orientation or whether they have undergone tubal ligation, who meets the following criteria: 1) has achieved menarche at some point, 2) has not undergone a hysterectomy or bilateral oophorectomy; or 3) has not been naturally postmenopausal (amenorrhea following cancer therapy does not rule out childbearing potential) for at least 24 consecutive months (i.e., has had menses at any time in the preceding 24 consecutive months)

• Patient must not expect to conceive or father children by using accepted and effective method(s) of contraception or by abstaining from sexual intercourse for the duration of their participation in the study and for 5 months after the last dose of protocol treatment for patients on Arm B and for 3 months after the last dose of protocol treatment for patients on Arm A. In addition, patients randomized to Arm A and receive the daratumumab-hyaluronidase, pomalidomide, dexamethasone (DPd) regimen must also agree to register to the mandatory Risk Evaluation and Mitigation Strategies (REMS®) program and be willing and able to comply with the requirements of the REMS program. All patients must not breastfeed while on protocol treatment and for patients on Arm B they must not breastfeed for an additional 5 months after the last dose of protocol treatment

• Patient may have primary plasma cell leukemia (pPCL), secondary plasma cell leukemia (sPCL) or extramedullary myeloma (EMM)

• Patient must not have evidence of active or untreated central nervous system (CNS) positive MM. Patients with prior CNS involvement are eligible provided they had demonstrated evidence of CNS disease resolution by imaging and/or 2 consecutively negative cerebrospinal fluid (CSF) samples for the presence of plasma cells

• Patient must not have active autoimmune disease

• Human immunodeficiency virus (HIV)-infected patients on effective anti-retroviral therapy with undetectable viral load within 6 months of randomization are eligible for this trial

• For patients with evidence of chronic hepatitis B virus (HBV) infection, the HBV viral load must be undetectable on suppressive therapy, if indicated

• Patients with a history of hepatitis C virus (HCV) infection must have been treated and cured. For patients with HCV infection who are currently on treatment, they are eligible if they have an undetectable HCV viral load

• Patients with a prior or concurrent malignancy whose natural history or treatment does not have the potential to interfere with the safety or efficacy assessment of the investigational regimen are eligible for this trial

• Patients with known history or current symptoms of cardiac disease, or history of treatment with cardiotoxic agents, should have a clinical risk assessment of cardiac function using the New York Heart Association Functional Classification. To be eligible for this trial, patients should be class 2B or better

• Patients with a history of chronic obstructive pulmonary disease (COPD) must have forced expiratory volume in 1 second (FEV1) testing done within 28 days prior to randomization and the forced expiratory volume in 1 second (FEV1) must be >= 50% of predicted normal

• Patient must not have moderate or severe persistent asthma within 2 years prior to randomization

  • NOTE: Patients who currently have controlled intermittent asthma or controlled mild persistent asthma are eligible

• Investigator must declare the intended chemotherapy regimen at the time of randomization should their patient be randomized to Arm A from the two options

Exclusion Criteria

Not provided

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Arm A Treatment II Option 1 (DKd)	Daratumumab and Recombinant Human Hyaluronidase	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes carfilzomib IV on days 1, 2, 8, 9, 15, and 16 of each cycle, and dexamethasone PO or IV on days 1, 2, 8, 9, 15, and 16 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm B (daratumumab, teclistamab)	Teclistamab	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6 and on day 1 of subsequent cycles. Patients also receive teclistamab SC on day 2, 4, 8, 15 and 22 of cycle 1, on days 1, 8, 15, and 22 of cycle 2, on days 1 and 15 of cycles 3-6 and then on day 1 of subsequent cycles. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment I (DPd)	Biospecimen Collection	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6, then on day 1 of subsequent cycles. Patients also receive pomalidomide PO on days 1-21 of each cycle, dexamethasone PO or IV on days 1, 8, 15, and 22 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment I (DPd)	Bone Marrow Biopsy	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6, then on day 1 of subsequent cycles. Patients also receive pomalidomide PO on days 1-21 of each cycle, dexamethasone PO or IV on days 1, 8, 15, and 22 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment I (DPd)	Computed Tomography	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6, then on day 1 of subsequent cycles. Patients also receive pomalidomide PO on days 1-21 of each cycle, dexamethasone PO or IV on days 1, 8, 15, and 22 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment I (DPd)	Daratumumab and Recombinant Human Hyaluronidase	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6, then on day 1 of subsequent cycles. Patients also receive pomalidomide PO on days 1-21 of each cycle, dexamethasone PO or IV on days 1, 8, 15, and 22 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment II Option 1 (DKd)	Dexamethasone	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes carfilzomib IV on days 1, 2, 8, 9, 15, and 16 of each cycle, and dexamethasone PO or IV on days 1, 2, 8, 9, 15, and 16 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment II Option 1 (DKd)	FDG-Positron Emission Tomography	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes carfilzomib IV on days 1, 2, 8, 9, 15, and 16 of each cycle, and dexamethasone PO or IV on days 1, 2, 8, 9, 15, and 16 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment II Option 2 (DKd)	Biospecimen Collection	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6 and on day 1 of subsequent cycles, carfilzomib IV on days 1, 8, and 15 of each cycle, and dexamethasone PO or IV on days 1, 8, 15, and 22 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment II Option 2 (DKd)	Bone Marrow Biopsy	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6 and on day 1 of subsequent cycles, carfilzomib IV on days 1, 8, and 15 of each cycle, and dexamethasone PO or IV on days 1, 8, 15, and 22 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment II Option 2 (DKd)	Carfilzomib	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6 and on day 1 of subsequent cycles, carfilzomib IV on days 1, 8, and 15 of each cycle, and dexamethasone PO or IV on days 1, 8, 15, and 22 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment II Option 2 (DKd)	Computed Tomography	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6 and on day 1 of subsequent cycles, carfilzomib IV on days 1, 8, and 15 of each cycle, and dexamethasone PO or IV on days 1, 8, 15, and 22 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment II Option 2 (DKd)	Daratumumab and Recombinant Human Hyaluronidase	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6 and on day 1 of subsequent cycles, carfilzomib IV on days 1, 8, and 15 of each cycle, and dexamethasone PO or IV on days 1, 8, 15, and 22 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment II Option 2 (DKd)	Dexamethasone	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6 and on day 1 of subsequent cycles, carfilzomib IV on days 1, 8, and 15 of each cycle, and dexamethasone PO or IV on days 1, 8, 15, and 22 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm B (daratumumab, teclistamab)	Biospecimen Collection	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6 and on day 1 of subsequent cycles. Patients also receive teclistamab SC on day 2, 4, 8, 15 and 22 of cycle 1, on days 1, 8, 15, and 22 of cycle 2, on days 1 and 15 of cycles 3-6 and then on day 1 of subsequent cycles. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm B (daratumumab, teclistamab)	Bone Marrow Biopsy	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6 and on day 1 of subsequent cycles. Patients also receive teclistamab SC on day 2, 4, 8, 15 and 22 of cycle 1, on days 1, 8, 15, and 22 of cycle 2, on days 1 and 15 of cycles 3-6 and then on day 1 of subsequent cycles. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm B (daratumumab, teclistamab)	Computed Tomography	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6 and on day 1 of subsequent cycles. Patients also receive teclistamab SC on day 2, 4, 8, 15 and 22 of cycle 1, on days 1, 8, 15, and 22 of cycle 2, on days 1 and 15 of cycles 3-6 and then on day 1 of subsequent cycles. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm B (daratumumab, teclistamab)	Daratumumab and Recombinant Human Hyaluronidase	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6 and on day 1 of subsequent cycles. Patients also receive teclistamab SC on day 2, 4, 8, 15 and 22 of cycle 1, on days 1, 8, 15, and 22 of cycle 2, on days 1 and 15 of cycles 3-6 and then on day 1 of subsequent cycles. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm B (daratumumab, teclistamab)	FDG-Positron Emission Tomography	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6 and on day 1 of subsequent cycles. Patients also receive teclistamab SC on day 2, 4, 8, 15 and 22 of cycle 1, on days 1, 8, 15, and 22 of cycle 2, on days 1 and 15 of cycles 3-6 and then on day 1 of subsequent cycles. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment I (DPd)	Dexamethasone	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6, then on day 1 of subsequent cycles. Patients also receive pomalidomide PO on days 1-21 of each cycle, dexamethasone PO or IV on days 1, 8, 15, and 22 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment II Option 2 (DKd)	FDG-Positron Emission Tomography	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6 and on day 1 of subsequent cycles, carfilzomib IV on days 1, 8, and 15 of each cycle, and dexamethasone PO or IV on days 1, 8, 15, and 22 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment I (DPd)	FDG-Positron Emission Tomography	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6, then on day 1 of subsequent cycles. Patients also receive pomalidomide PO on days 1-21 of each cycle, dexamethasone PO or IV on days 1, 8, 15, and 22 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment I (DPd)	Pomalidomide	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes on days 1, 8, 15, and 22 of cycles 1 and 2, on days 1 and 15 of cycles 3-6, then on day 1 of subsequent cycles. Patients also receive pomalidomide PO on days 1-21 of each cycle, dexamethasone PO or IV on days 1, 8, 15, and 22 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment II Option 1 (DKd)	Carfilzomib	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes carfilzomib IV on days 1, 2, 8, 9, 15, and 16 of each cycle, and dexamethasone PO or IV on days 1, 2, 8, 9, 15, and 16 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment II Option 1 (DKd)	Biospecimen Collection	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes carfilzomib IV on days 1, 2, 8, 9, 15, and 16 of each cycle, and dexamethasone PO or IV on days 1, 2, 8, 9, 15, and 16 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment II Option 1 (DKd)	Bone Marrow Biopsy	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes carfilzomib IV on days 1, 2, 8, 9, 15, and 16 of each cycle, and dexamethasone PO or IV on days 1, 2, 8, 9, 15, and 16 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.
Arm A Treatment II Option 1 (DKd)	Computed Tomography	Patients receive daratumumab-hyaluronidase SC over 3-5 minutes carfilzomib IV on days 1, 2, 8, 9, 15, and 16 of each cycle, and dexamethasone PO or IV on days 1, 2, 8, 9, 15, and 16 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo urine and blood sample collection, bone marrow biopsy, and FDG PET/CT throughout the study.

Primary Outcome Measures

Name	Time	Method
Minimal residual disease (MRD) negativity	After 6 cycles of treatment (cycle length = 28 days), assessed at 6 months	Will be determined by the Adaptive Biotechnologies clonoSEQ assay result. Analysis will be performed using Cochran-Mantel-Haenszel (CMH) test, stratified on prior anti-CD38 antibody therapy and investigator's choice of therapy if assigned to Arm A. MRD-negative status requires both MRD negativity and achievement of complete response. Will be summarized using descriptive statistics by treatment arm with two-sided exact binomial 80% confidence intervals (CI), Clopper-Pearson. The corresponding CMH odds ratio (OR) estimate with an 80% CI, and p-value will be reported. Logistic regression will be used to assess the treatment effect within subgroups including but not limited to age 70 status, prior anti-CD38 antibody therapy and high-risk by fluorescence in situ hybridization status.

Secondary Outcome Measures

Name	Time	Method
Incidence of adverse events (AEs)	Up to 6 cycles (cycle length = 28 days) and overall assessed up to 10 years	Will be graded according to the National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) and classified by Medical Dictionary for Regulatory Activities (MedDRA) system organ class. Maximum grade toxicity by AE type will be tabulated. Summaries (count and percentages) will be reported by AE type by arm.
Incidence of grade 3 or higher hematologic and/or non-hematologic AEs	Up to 6 cycles (cycle length = 28 days) and overall assessed up to 10 years	Will be graded according to the NCI CTCAE and classified by MedDRA system organ class. Maximum grade toxicity by AE type will be tabulated. Summaries (count and percentages) will be reported by AE type by arm. Rates of maximum grade 3 or higher (including grade 5) non-hematologic, hematologic and overall toxicity will be calculated along with 90% CIs. AEs will be further analyzed by arm in subsets of serious AEs per protocol, lethal AEs and treatment-emergent AEs status.
Progression-free survival (PFS)	From randomization until the earlier of progression or death due to any cause, assessed up to 10 years	PFS will be estimated in the treated population using the Kaplan-Meier method and compared between arms using the stratified log-rank test. Stratified cox proportional hazards (PH) regression will be used to produce the treatment hazard ratio (HR) along with the 90% CI, provided PH assumption is valid. Sensitivity analyses excluding untreated patients will be conducted.
Overall survival (OS)	From randomization to death due to any cause, assessed up to 10 years	OS will be estimated in the treated population using the Kaplan-Meier method and compared between arms using the stratified log-rank test. Stratified cox PH regression will be used to produce the treatment HR along with the 90% CI, provided PH assumption is valid. Sensitivity analyses excluding untreated patients will be conducted.
Response rates	After 6 cycles of treatment (cycle length = 28 days) and overall, assessed up to 10 years	Will be reported by treatment arm. Rates of stringent complete response (CR) or better, very good partial response (VGPR) or better and partial response (PR) or better will be computed along with 90% CIs in all treated patients. Stratified CMH test will be used to test the difference in VGPR or better rates between arms. Sensitivity analyses excluding untreated patients will be conducted.