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A Phase 1/2 Study of Linvoseltamab in Patients With Relapsed or Refractory Systemic Light Chain Amyloidosis


Description

This study is researching an experimental drug called linvoseltamab ("study drug"). This study is focused on patients who have AL amyloidosis that has returned or have failed other therapies and need to be treated again. The study consists of 2 phases (Phase 1 and Phase 2): * In Phase 1, linvoseltamab will be given to a small number of participants to study the side effects of the study drug and to determine the recommended doses of the study drug to be given to participants in Phase 2. * In Phase 2, linvoseltamab will be given to more participants to continue to assess the side effects of the study drug and to evaluate the ability of linvoseltamab to treat AL amyloidosis. The study is looking at several other research questions, including: * How many participants treated with linvoseltamab have improvement in the abnormal proteins that cause organ problems and for how long * How many participants treated with linvoseltamab have improvement in the heart or kidney and for how long

Trial Eligibility

Key Inclusion Criteria: 1. Confirmed diagnosis of AL amyloidosis, as described in the protocol 2. Measurable disease as defined by serum difference between involved and uninvolved free light chains (dFLC) concentration, as described in the protocol 3. Previously treated after at least 1 prior therapy and no more than 4 lines of therapy (including autologous stem cell transplant) and requiring further treatment as assessed by the Investigator 4. N-terminal pro b-type natriuretic peptide (NT-proBNP) ≤8500 ng/L during screening 5. Adequate hepatic, hematologic, renal, and cardiac function, as described in the protocol 6. Eastern Cooperative Oncology Group (ECOG) performance score ≤2 at screening Key Exclusion Criteria: 1. History of other non-AL amyloidosis 2. Greater than 60% plasmacytosis on a bone marrow biopsy and/or aspirate during screening 3. Presence of lytic bone lesion(s) or extramedullary plasmacytoma on imaging during screening 4. Myocardial infarction within the past 6 months prior to the first screening visit 5. Known active infection requiring hospitalization or treatment with IV anti-infectives within 28 days of first administration of study drug NOTE: Other protocol defined inclusion/exclusion criteria apply

Study Info

Organization

Regeneron Pharmaceuticals


Primary Outcome

Incidence of dose-limiting toxicity (DLTs)


Outcome Timeframe Up to 28 Days

NCTID NCT06292780

Phases PHASE1,PHASE2

Primary Purpose TREATMENT

Start Date 2024-08-07

Completion Date 2028-08-20

Enrollment Target 220

Interventions

DRUG Linvoseltamab

Locations Recruiting

City of Hope

United States, California, Duarte


University Hospital Son Espases

Spain, Balearic Islands, Palma


Clinica Universidad de Navarra

Spain, Navarra, Pamplona


University Hospital La Fe

Spain, Valencia


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