Under construction – not a live service
Sign in
Taking peoplePhase 1/2

Tests linvoseltamab in adults with relapsed or refractory multiple myeloma

Tests linvoseltamab for safety and dosing in adults with returning or resistant myeloma.

Key facts

Who runs it
Regeneron Pharmaceuticals
Where
Essen, Mainz, and Würzburg, GermanySee the 3 sitesAlso in 6 other countries, 37 sites
Registry title
Phase 1/2 Study of Linvoseltamab in Adult Patients With Relapsed or Refractory Multiple Myeloma
Status
Recruiting
Phase
Phase 1/2
People taking part
387 people, planned
Started
23 Jan 2019
Expected to end
16 Jun 2033
Type of study
Interventional, 4 groups
Treatments tested
  • Linvoseltamab
Record updated
26 October 2026

Who can take part

AI summary

From the trial's eligibility criteria. Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.

The trial is looking for adults with multiple myeloma that came back or stopped responding after several earlier treatments, to test the safety and dose of linvoseltamab.

Age
18 years or older
Sex
All sexes can join
Disease stage
Active multiple myeloma that can be measured and has come back or not responded. People need at least 3 earlier lines of treatment, or myeloma that did not respond to a proteasome inhibitor, an IMiD and an anti-CD38 antibody.
Earlier treatment
Earlier treatment with a proteasome inhibitor, an IMiD and an anti-CD38 antibody is needed. Earlier treatment with BCMA-directed immunotherapy (including BCMA bispecific antibodies) is not allowed. After BCMA CAR-T, there must have been a response of PR or better and a gap of at least 60 days.

Main reasons for not taking part

  • Plasma cell leukemia, primary light-chain amyloidosis, Waldenström macroglobulinemia or POEMS syndrome
  • Known myeloma in the brain or the membranes around it
  • Heart ejection fraction below 40%
  • Earlier donor (allogeneic) stem cell transplant, or own stem cell transplant within 12 weeks
  • Earlier BCMA-directed immunotherapy, including BCMA bispecific antibodies

The registry criteria, word for word

Show all 5 criteriaShow less

Who can take part

  • Eastern Cooperative Oncology Group (ECOG) performance status ≤ 1
  • Confirmed diagnosis of active Multiple Myeloma (MM) by International Myeloma Working Group (IMWG) diagnostic criteria
  • Patients must have myeloma that is response-evaluable according to the 2016 IMWG response criteria as defined in the protocol; Phase 1, Part 1 (Dose Escalation): Patients with MM who have exhausted all therapeutic options that are expected to provide meaningful clinical benefit, either through disease relapse, treatment refractory disease or intolerance of the therapy and including either:; Progression on or after at least 3 lines of therapy, or intolerance of therapy, including a proteasome inhibitor, an Immunomodulatory agent (IMiD), and an anti-CD38 antibody, OR b. Progression on or after an anti-CD38 antibody and have disease that is "double refractory" to a proteasome inhibitor and an IMiD, or intolerance of therapy. The anti-CD38 antibody may have been administered alone or in combination with another agent such as a proteasome inhibitor (PI). Refractory disease is defined as lack of response or relapse within 60 days of last treatment; Phase 1, Part 2 (SC Administration): Patients with MM whose disease meets the following criteria:; Progression on or after at least 3 prior lines of therapy including a(n) PI, IMiD, and anti-CD38 antibody, OR b. Patients must be triple-refractory, defined as being refractory to prior treatment with at least 1 anti-CD38 antibody, a proteasome inhibitor, and an IMiD; Phase 2 (Cohorts 1 and 2):; Patients with MM whose disease meets the following criteria:; Progression on or after at least 3 prior lines of therapy including a(n) PI, IMiD, and anti-CD38 antibody, OR b. Patients must be triple- refractory, defined as being refractory* to prior treatment with at least 1 PI, 1 IMiD, and an anti-CD38 antibody; Phase 2 (Cohort 3):; Patients with MM whose disease meets the following criteria:; Progression on or after at least 3 prior lines of therapy including a(n) PI, IMiD, and anti-CD38 antibody, OR; Patients must be triple- refractory, defined as being refractory* to prior treatment with at least 1 PI, 1 IMiD, and an anti-CD38 antibody; Refractory disease is defined as progression during treatment or within 60 days after completion of therapy, or <25% response to therapy; AND, for ALL patients, if they have relapsed after a BCMA-directed CAR-T cellular therapy then:; Treatment with a CAR-T must have been associated with a response of PR or better, and; If CAR-T cellular therapy was the most recent prior therapy, excluding corticosteroids, then treatment must have been a minimum of 60 days prior to treatment with linvoseltamab

Who cannot take part

  • History of allogeneic stem cell transplantation at any time, or autologous stem cell transplantation within 12 weeks of the start of study treatment; Note: Other protocol defined inclusion / exclusion criteria apply
  • Diagnosis of plasma cell leukemia, primary systemic light-chain amyloidosis, (excluding myeloma-associated amyloidosis), Waldenström macroglobulinemia (lymphoplasmacytic lymphoma), or POEMS syndrome (polyneuropathy, organomegaly, endocrinopathy, monoclonal protein, and skin changes) 2. Patients with known MM brain lesions or meningeal involvement 3. Cardiac ejection fraction <40% by echocardiogram or multi-gated acquisition scan (MUGA) 4. Prior treatment with BCMA-directed immunotherapies, including BCMA bispecific antibodies and BiTEs. Note: BCMA antibody-drug conjugates are not excluded and BCMA-directed CAR-T treatment is not excluded in Phase 2 Cohort 3

Where in Germany

Also in 6 other countries, 37 sites

  • Universitätsklinikum EssenEssen, GermanyContact: Clinical Trial AdministratorNo longer taking part
  • Universitaetsmedizin der Johannes Gutenberg Universitaet Mainz KoeRMainz, GermanyContact: Clinical Trial AdministratorNo longer taking part
  • Universitätsklinikum WürzburgWürzburg, GermanyContact: Clinical Trial AdministratorNo longer taking part

About the trial

What the trial wants to find out

The main purpose of this study is to learn about the safety of linvoseltamab and to find out what is the best dose of linvoseltamab to give to patients with multiple myeloma and to look for any signs that linvoseltamab can effectively treat cancer.

Read full original descriptionShow less

The study is looking at several other research questions, including:

* Side effects that may be experienced by people receiving linvoseltamab * How linvoseltamab works in the body * How much linvoseltamab is present in the blood * How linvoseltamab may work to treat cancer

The 4 groups in the trial

  • Linvoseltamab - Phase 1Treatment being tested

    Phase 1 has two parts. Part 1, consists of linvoseltamab intravenous (IV) dose escalation and Part 2, consists of subcutaneous (SC) administration.

    Treatment: Linvoseltamab

  • Linvoseltamab - Phase 2 - Cohort 1Treatment being tested

    Low Dose of linvoseltamab IV monotherapy.

    Treatment: Linvoseltamab

  • Linvoseltamab - Phase 2 - Cohort 2Treatment being tested

    High Dose of linvoseltamab IV monotherapy.

    Treatment: Linvoseltamab

  • Linvoseltamab - Phase 2 - Cohort 3Treatment being tested

    Anti-interleukin (IL)-6 receptor (R) prophylactic therapy followed by high dose of IV linvoseltamab monotherapy.

    Treatment: Linvoseltamab

Questions to ask the study team

  1. How often do I need to come in, and for how long each time?
  2. Are travel costs paid?
  3. Can I keep my own doctor?
  4. What happens if I want to stop?

Contact the study team: see the registry record → Contacts and Locations

Print a page for my doctor

Data and sources

Registry record
Listed on ClinicalTrials.gov and on the EU's official list of trials (CTIS).
Official title
Phase 1/2 FIH Study of REGN5458 (Anti-BCMA x Anti-CD3 Bispecific Antibody) in Patients With Relapsed or Refractory Multiple Myeloma
Plain-language title
Tests linvoseltamab in adults with relapsed or refractory multiple myelomaGenerated from the registry record. The registry title is the official one.
AI summary
From the trial's eligibility criteria. Read by machine on 12 November 2026.
Publications
Record updated
26 October 2026