A Proof-of-Concept Study to Learn Whether Linvoseltamab Can Eliminate Abnormal Plasma Cells That May Lead to Multiple Myeloma in Adult Patients With High-Risk Monoclonal Gammopathy of Undetermined Significance or Non-High-Risk Smoldering Multiple Myeloma

NCT ID: NCT06140524

Last Updated: 2026-01-22

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

PHASE2

Total Enrollment

116 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-09-16

Study Completion Date

2032-05-18

Brief Summary

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This study is researching an investigational drug called linvoseltamab ("study drug") in participants at moderate risk of developing multiple myeloma (about 3 to 10% average annual risk), a group that consists of patients with precancerous conditions called High-Risk Monoclonal Gammopathy of Undetermined Significance (HR-MGUS) and Non-High-Risk Smoldering Multiple Myeloma (NHR-SMM).

The primary purpose of the study is to understand how well the study drug can eliminate abnormal plasma cells and laboratory signs of HR-MGUS and NHR-SMM.

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

* How many participants treated with linvoseltamab have improvement of their HR-MGUS or NHR-SMM?
* What side effects may happen from taking the study drug?
* How much study drug is in the blood at different times?
* Whether the body makes antibodies against the study drug (which could make the drug less effective or could lead to side effects).

Detailed Description

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Conditions

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Monoclonal Gammopathy of Undetermined Significance (MGUS) Smoldering Multiple Myeloma (SMM)

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

SEQUENTIAL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Safety Run-In (Part 1)

Sequential groups of participants will be enrolled to assess the initial safety and tolerability of the step-up regimen leading up to the start of different full doses of linvoseltamab.

Group Type EXPERIMENTAL

Linvoseltamab

Intervention Type DRUG

Administered per the protocol

Expansion (Part 2) - Dose regimen 1

Participants will be randomized in a 1:1:1:1 ratio across 4 dosing regimens

Group Type EXPERIMENTAL

Linvoseltamab

Intervention Type DRUG

Administered per the protocol

Expansion (Part 2) - Dose regimen 2

Participants will be randomized in a 1:1:1:1 ratio across 4 dosing regimens

Group Type EXPERIMENTAL

Linvoseltamab

Intervention Type DRUG

Administered per the protocol

Expansion (Part 2) - Dose regimen 3

Participants will be randomized in a 1:1:1:1 ratio across 4 dosing regimens

Group Type EXPERIMENTAL

Linvoseltamab

Intervention Type DRUG

Administered per the protocol

Expansion (Part 2) - Dose regimen 4

Participants will be randomized in a 1:1:1:1 ratio across 4 dosing regimens

Group Type EXPERIMENTAL

Linvoseltamab

Intervention Type DRUG

Administered per the protocol

Interventions

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Linvoseltamab

Administered per the protocol

Intervention Type DRUG

Other Intervention Names

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REGN5458 Lynozyfic™

Eligibility Criteria

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Inclusion Criteria

1. HR-MGUS or NHR-SMM as defined in the protocol
2. Eastern Cooperative Oncology Group (ECOG) performance status ≤1
3. Adequate hematologic and hepatic function, as described in the protocol
4. Estimated glomerular filtration rate (GFR) ≥30 mL/min/1.73 m\^2 by the Modification of Diet in Renal Disease (MDRD) equation

Exclusion Criteria

1. High-risk SMM, as defined in the protocol
2. Evidence of any of myeloma-defining events, as described in the protocol
3. Diagnosis of systemic light-chain amyloidosis, Waldenström macroglobulinemia (lymphoplasmacytic lymphoma), solitary plasmacytoma, or symptomatic MM
4. Clinically significant cardiac or vascular disease within 3 months of study enrollment, as described in the protocol
5. Any infection requiring hospitalization or treatment with intravenous (IV) anti-infectives within 28 days of the first dose of linvoseltamab
6. Uncontrolled Human Immunodeficiency Virus (HIV), Hepatitis B Virus (HBV), or Hepatitis C Virus (HCV) infection; or other uncontrolled infection or unexplained signs of infection, as described in the protocol
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Regeneron Pharmaceuticals

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Clinical Trial Management

Role: STUDY_DIRECTOR

Regeneron Pharmaceuticals

Locations

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Johns Hopkins Hospital

Baltimore, Maryland, United States

Site Status RECRUITING

Dana-Farber Cancer Institute

Boston, Massachusetts, United States

Site Status RECRUITING

University of Michigan Health

Ann Arbor, Michigan, United States

Site Status RECRUITING

Stony Brook University Hospital

Stony Brook, New York, United States

Site Status RECRUITING

Thomas Jefferson University Hospital

Philadelphia, Pennsylvania, United States

Site Status RECRUITING

University of Washington

Seattle, Washington, United States

Site Status RECRUITING

Hospital Universitario Virgen de las Nieves

Granada, Andalusia, Spain

Site Status RECRUITING

Hospital Universitari Mutua Terrassa

Terrassa, Barcelona, Spain

Site Status RECRUITING

Hospital Clinico Universitario Virgen De La Arrixaca

El Palmar, Murcia, Spain

Site Status RECRUITING

Hospital de Cabuenes

Gijón, Principality of Asturias, Spain

Site Status RECRUITING

Hospital Sant Pau

Barcelona, , Spain

Site Status RECRUITING

Universitaru Hospital La Princesa

Madrid, , Spain

Site Status RECRUITING

Hospital General Universitario Morales Meseguer

Murcia, , Spain

Site Status RECRUITING

Countries

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United States Spain

Central Contacts

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Clinical Trials Administrator

Role: CONTACT

844-734-6643

Other Identifiers

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2023-505242-25-00

Identifier Type: CTIS

Identifier Source: secondary_id

R5458-ONC-2257

Identifier Type: -

Identifier Source: org_study_id

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