Phase 1b Study Evaluating OPomD in Relapsed or Refractory Multiple Myeloma

Inclusion Criteria

• Participant must have a pathologically documented, definitively diagnosed, multiple myeloma relapse, or refractory progressive disease after at least 2 lines of therapy for multiple myeloma. Prior therapeutic treatment or regimens must include a proteasome inhibitor and lenalidomide.
• Participant must be willing and able to undergo bone marrow aspirate per protocol (with or without bone marrow biopsy per institutional guidelines).
• Measurable disease (assessed within 28 days prior to day 1).
• Eastern Cooperative Oncology Group (ECOG) performance status of <= 2.
• Other Inclusion Criteria May Apply

Exclusion Criteria

• Currently receiving treatment in another investigational device or drug study, or less than 28 days or 5 half-lives whichever is shorter since ending treatment on another investigational device or drug study(s).
• Previously received an allogeneic stem cell transplant and the occurrence of one or more of the following: received the transplant within 6 months prior to study day 1; received immunosuppressive therapy within the last 3 months prior to study day 1; having signs or symptoms of acute or chronic graft-versus-host disease.
• Autologous stem cell transplant < 90 days prior to study day 1.
• Multiple myeloma with IgM subtype.
• POEM syndrome (polyneuropathy, organomegaly, endocrinopathy, monoclonal protein, and skin changes).
• Plasma cell leukemia (> 2.0 X10^9/L circulating plasma cells by standard differential).
• Waldenstrom's macroglobulinemia.
• Other Exclusion Criteria May Apply