A Phase 3 interventional study of Linvoseltamab and Elotuzumab in Relapsed Refractory Multiple Myeloma (RRMM), sponsored by Regeneron Pharmaceuticals. Recruiting at 159 sites in 18 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-09-30.
Sponsored by Regeneron Pharmaceuticals · Phase 3, Interventional, and Treatment
This study is researching an experimental drug called linvoseltamab, also called REGN5458.
Linvoseltamab has previously been studied by itself (without other cancer drugs) in participants who had advanced multiple myeloma that returned and needed to be treated again after many other therapies had failed. These participants were no longer benefiting from standard medications and had no good treatment options. In that study, some participants who were treated with linvoseltamab had improvement of their myeloma (shrinkage of their tumors), including some participants who had complete responses (that is, the treatment got rid of all evidence of myeloma in their bodies).
This study is focused on participants who have multiple myeloma that has returned or needs to be treated again after one to four prior treatments and have standard cancer treatment options available to them. The aim of this study is to see how safe and effective linvoseltamab is compared to a combination of three cancer drugs: elotuzumab, pomalidomide and dexamethasone, (called EPd) in participants who have returned after having received prior treatment that included lenalidomide, a proteosome inhibitor, and (for participants in some countries) a cluster of differentiation 38 (CD38) antibody. Half of the participants in this study will get linvoseltamab, and the other half will get EPd.
This study is looking at several other research questions, including:
Key Inclusion Criteria:
Received at least 1 and no more than 4 prior lines of anti-neoplastic MM therapies, including lenalidomide and a proteasome inhibitor and demonstrated disease progression on or after the last therapy as defined by the 2016 IMWG criteria. Participants who have received only 1 line of prior line of antimyeloma therapy must be lenalidomide refractory, as described in the protocol.
Note: Participants in Israel also must have previously received a CD38 antibody. Participants in the EU and the UK must have previously received 2 to 4 prior lines of therapy, including a CD38 antibody.
Key Exclusion Criteria:
NOTE: Other protocol defined inclusion/exclusion criteria apply
Randomization 1:1
Drug: Linvoseltamab
Randomization 1:1
Drug: Elotuzumab · Drug: Pomalidomide · Drug: Dexamethasone
REGN5458 will be administered by intravenous (IV) infusion
Also known as: REGN5458, Lynozyfic™
Elotuzumab will be administered by IV infusion
Also known as: Empliciti
Pomalidomide capsules will be administered by mouth (PO)
Also known as: Pomalyst
Dexamethasone tablets/capsules will be administered PO and/or by IV infusion
Also known as: Decadron
Progression Free Survival (PFS) per International Myeloma Working Group (IMWG) response criteria determined by Independent Review Committee (IRC) in CD38 antibody exposed participants
Time frame: Up to approximatively 5 years
PFS per IMWG response criteria determined by IRC in all participants
Time frame: Up to approximatively 5 years
Objective Response (OR) of Complete Response (CR) or better per IMWG response criteria as determined by IRC in CD38 antibody exposed participants
Time frame: Up to approximatively 5 years
OR of CR or better per IMWG response criteria as determined by IRC in all participants
Time frame: Up to approximatively 5 years
Overall Survival (OS) in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
OS in all participants
Time frame: Up to approximatively 5 years
Incidence of minimal residual disease (MRD) negative status in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
Incidence of MRD negative status in all participants
Time frame: Up to approximatively 5 years
Mean change in the worst pain score measured by Brief Pain Inventory-Short Form (BPI-SF) Item 3 in participants previously exposed to CD38 antibodies
The BPI-SF is a validated, self-administered questionnaire designed to measure a participant's perceived level of pain. The BPI-SF Item 3 uses a numeric rating scale to assess pain severity and pain interference in the past 24 hours. The numeric rating scale ranges from 0 (no pain) to 10 (worst imaginable pain), where higher scores indicate greater intensity of pain.
Time frame: Baseline to week 12
Mean change in the worst pain score measured by BPI-SF Item 3 in all participants
The BPI-SF is a validated, self-administered questionnaire designed to measure a participant's perceived level of pain. The BPI-SF Item 3 uses a numeric rating scale to assess pain severity and pain interference in the past 24 hours. The numeric rating scale ranges from 0 (no pain) to 10 (worst imaginable pain), where higher scores indicate greater intensity of pain.
Time frame: Baseline to week 12
Incidence of treatment emergent adverse events (TEAEs) in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
Incidence TEAEs in all participants
Time frame: Up to approximatively 5 years
Severity of TEAEs in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
Severity of TEAEs in all participants
Time frame: Up to approximatively 5 years
Incidence of adverse events of special interest (AESI) in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
Incidence of AESI in all participants
Time frame: Up to approximatively 5 years
Severity of AESI in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
Severity AESI in all participants
Time frame: Up to approximatively 5 years
Incidence of Serious Adverse Events (SAE) in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
Incidence of SAE in all participants
Time frame: Up to approximatively 5 years
Severity of SAE in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
Severity of SAE in all participants
Time frame: Up to approximatively 5 years
PFS per IMWG response criteria as determined by the investigator in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
PFS per IMWG response criteria as determined by the investigator in all participants
Time frame: Up to approximatively 5 years
OR of Partial Response (PR) or better per IMWG response criteria as determined by the IRC in CD38 antibody exposed participants
Time frame: Up to approximatively 5 years
OR of PR or better per IMWG response criteria as determined by the IRC in all participants
Time frame: Up to approximatively 5 years
OR of Very Good Partial Response (VGPR) or better per IMWG response criteria as determined by IRC in CD38 antibody exposed participants
Time frame: Up to approximatively 5 years
OR of VGPR or better per IMWG response criteria as determined by IRC in all participants
Time frame: Up to approximatively 5 years
OR of PR or better per IMWG response criteria as determined by the investigator in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
OR of PR or better per IMWG response criteria as determined by the investigator in all participants
Time frame: Up to approximatively 5 years
OR of VGPR or better per IMWG response criteria as determined by the investigator in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
OR of VGPR or better per IMWG response criteria as determined by the investigator in all participants
Time frame: Up to approximatively 5 years
OR of CR or better per IMWG response criteria as determined by the investigator in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
OR of CR or better per IMWG response criteria as determined by the investigator in all participants
Time frame: Up to approximatively 5 years
Duration of Response (DoR) as per IMWG response criteria as determined by the investigator in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
DoR as per IMWG response criteria as determined by the investigator in all participants
Time frame: Up to approximatively 5 years
DoR as per IMWG response criteria as determined by the IRC in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
DoR as per IMWG response criteria as determined by the IRC in all participants
Time frame: Up to approximatively 5 years
Duration of MRD negative status in the bone marrow in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
Duration of MRD negative status in the bone marrow in all participants
Time frame: Up to approximatively 5 years
Time from randomization to objective response (≥PR) as per IMWG response criteria as determined by the investigator in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
Time from randomization to objective response (≥PR) as per IMWG response criteria as determined by the investigator in all participants
Time frame: Up to approximatively 5 years
Time from randomization to objective response (≥PR) as per IMWG response criteria as determined by the IRC in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
Time from randomization to objective response (≥PR) as per IMWG response criteria as determined by the IRC in all participants
Time frame: Up to approximatively 5 years
Concentration of linvoseltamab in the serum over time in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
Concentration of linvoseltamab in the serum over time in all participants
Time frame: Up to approximatively 5 years
Incidence of antidrug antibodies (ADAs) in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
Incidence of ADAs in all participants
Time frame: Up to approximatively 5 years
Titer of ADAs in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
Titer of ADAs in all participants
Time frame: Up to approximatively 5 years
Incidence of neutralizing antibodies (Nabs) to linvoseltamab over time in participants previously exposed to CD38 antibodies
Time frame: Up to approximatively 5 years
Incidence of Nabs to linvoseltamab over time in all participants
Time frame: Up to approximatively 5 years
Proportion of Pain Responders in participants previously exposed to CD38 antibodies
Defined by at least a 2-point reduction from baseline in the BPI-SF Item 3 without an increase in analgesic use using the modified Analgesic Quantification Algorithm (AQA).
Time frame: At week 12
Proportion of Pain Responders in all participants
Defined by at least a 2-point reduction from baseline in the BPI-SF Item 3 without an increase in analgesic use using the modified Analgesic Quantification Algorithm (AQA).
Time frame: At week 12
Change in patient-reported global health status/quality of life (QoL), per European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC QLQ-C30) in participants previously exposed to CD38 antibodies
The EORTC-QLQ-C30 is a 30-item subject self-report questionnaire composed of both multi-item and single scales, including global health status/quality of life, functional Scales (physical, role, emotional, cognitive, and social), symptom scales (fatigue, nausea and vomiting, and pain), and 6 single items (dyspnea, insomnia, appetite loss, constipation, diarrhea, and financial difficulties). Participants rate items on a 4-point scale, with 1 as "not at all" and 4 as "very much."
Time frame: Baseline to week 12
Change in patient-reported QoL, per EORTC QLQ-C30 in all participants
The EORTC-QLQ-C30 is a 30-item subject self-report questionnaire composed of both multi-item and single scales, including global health status/quality of life, functional Scales (physical, role, emotional, cognitive, and social), symptom scales (fatigue, nausea and vomiting, and pain), and 6 single items (dyspnea, insomnia, appetite loss, constipation, diarrhea, and financial difficulties). Participants rate items on a 4-point scale, with 1 as "not at all" and 4 as "very much."
Time frame: Baseline to week 12
Change in patient reported disease symptoms per EORTC Quality of Life Questionnaire-Multiple Myeloma (MM) module 20 [QLQ-MY20]) in participants previously exposed to CD38 antibodies
The EORTC QLQ-MY20 is a self -administered instrument to assess QoL in persons with MM. This 20-item questionnaire measures the following domains: symptom scales, including disease symptoms (6 items) and symptoms related to side effects of treatment (10 items); function scale and future perspective (3 items); and body image (1 item). A high score represents a high level of symptoms or problems.
Time frame: Baseline to week 12
Change in patient reported disease symptoms per EORTC QLQ-MY20 in all participants
The EORTC QLQ-MY20 is a self -administered instrument to assess QoL in persons with MM. This 20-item questionnaire measures the following domains: symptom scales, including disease symptoms (6 items) and symptoms related to side effects of treatment (10 items); function scale and future perspective (3 items); and body image (1 item). A high score represents a high level of symptoms or problems.
Time frame: Baseline to week 12
Patient-Reported Outcomes in Patient Global Impression of Symptom Severity (PGIS) in participants previously exposed to CD38 antibodies
The PGIS is a single 1-item questionnaire designed to assess participant's overall impression of disease severity at a given point in time by using a 4-point Likert scale that ranges from (1) = "none (no symptoms)" to (4) = "severe". The global anchor, PGIS will be used for interpretation of EORTC QLQ-C30, EORTC QLQ-MY20, and BPI-SF.
Time frame: Baseline to week 12
Patient-Reported Outcomes in PGIS in all participants
The PGIS is a single 1-item questionnaire designed to assess participant's overall impression of disease severity at a given point in time by using a 4-point Likert scale that ranges from (1) = "none (no symptoms)" to (4) = "severe". The global anchor, PGIS will be used for interpretation of EORTC QLQ-C30, EORTC QLQ-MY20, and BPI-SF.
Time frame: Baseline to week 12
Patient-Reported Outcomes in Patient Global Impression of Change (PGIC) in participants previously exposed to CD38 antibodies
The PGIC is a single-item questionnaire designed to assess the participant's overall sense of whether there has been a change since starting treatment as rated on a 5-point Likert scale anchored by (1) "much better" to (5) "much worse", with (4) = "no change". The global anchor, PGIC will be used for interpretation of EORTC QLQ-C30, EORTC QLQ-MY20, and BPI-SF.
Time frame: Baseline to week 12
Patient-Reported Outcomes in PGIC in all participants
The PGIC is a single-item questionnaire designed to assess the participant's overall sense of whether there has been a change since starting treatment as rated on a 5-point Likert scale anchored by (1) "much better" to (5) "much worse", with (4) = "no change". The global anchor, PGIC will be used for interpretation of EORTC QLQ-C30, EORTC QLQ-MY20, and BPI-SF.
Time frame: Baseline to week 12
Change in patient-reported general health status per EuroQoL-5 Dimension-5 Level Scale [EQ-5D-5L]) in participants previously exposed to CD38 antibodies
The EQ-5D-5L consists of EQ-5D descriptive system comprises five dimensions: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. Each dimension has 5 levels: no problems, slight problems, moderate problems, severe problems and extreme problems.
Time frame: Baseline to week 12
Change in patient-reported general health status per EQ-5D-5L in all participants
The EQ-5D-5L consists of EQ-5D descriptive system comprises five dimensions: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. Each dimension has 5 levels: no problems, slight problems, moderate problems, severe problems and extreme problems.
Time frame: Baseline to week 12
Showing the first 100 of 159 sites across 18 countries.
Plan to share: Yes — All Individual Patient Data (IPD) that underlie publicly available results will be considered for sharing
Supporting information: Study protocol, Sap, Icf, Csr, Analytic code
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