Overview
The purpose of this study is to evaluate the safety and tolerability of mRNA-2808 in participants with relapsed or refractory multiple myeloma (RRMM).
Eligibility
Key Inclusion Criteria:
- RRMM with prior exposure to a proteasome inhibitor, an immunomodulatory drug (IMiD), and an anti-cluster of differentiation (CD38) monoclonal antibody.
- Measurable disease defined as at least 1 of the following:
- Serum M-protein ≥0.5 grams/deciliter
- Urine M-protein ≥200 milligrams (mg)/24-hour
- Involved free light chain (FLC) ≥100 mg/liter and an abnormal FLC ratio
- Plasmacytoma with a single diameter ≥2 centimeters
- Bone marrow plasma cells >30%
Key Exclusion Criteria:
- Known central nervous system (CNS) myeloma or clinical signs and symptoms of CNS involvement of myeloma.
- Active plasma cell leukemia, defined as peripheral blood plasma cells ≥20%.
- Radiotherapy or cytotoxic chemotherapy within 2 weeks prior to Day 1 (Baseline), except palliative radiotherapy of limited field is permissible within 2 weeks after discussion with the Sponsor medical monitor.
- Antibody-based immunotherapy (monoclonal antibody, bispecific antibody, antibody drug conjugate) within 21 days prior to Day 1 (Baseline).
- Proteasome inhibitor therapy or immunomodulatory agent within 14 days prior to Day 1 (Baseline).
- Autologous hematopoietic cell transplant within 100 days prior to Day 1 (Baseline).
- Allogeneic hematopoietic cell transplant within 180 days prior to Day 1 (Baseline).
- Genetically modified adoptive autologous or allogeneic cellular therapy (for example, chimeric antigen receptor T cell, chimeric antigen receptor natural killer) within 12 weeks prior to Day 1 (Baseline).
- Corticosteroid therapy ≥140 mg prednisone or equivalent cumulative dose within 14 days prior to Day 1 (Baseline).
Note: Other inclusion and exclusion criteria may apply.