Elotuzumab, Selinexor, and Dexamethasone for Relapsed Refractory Multiple Myeloma — ESdRRMM  

Refractory Multiple Myeloma Clinical Trial

Official title: A Phase II, Single-Arm, Study of Elotuzumab, Selinexor, and Dexamethasone in Patients With Relapsed Refractory Multiple Myeloma

Status Withdrawn

Clinical Trial Summary

The food and drug administration (FDA) has approved the use of Selinexor, an oral, first-in class, exportin 1 (XPO1) inhibitor, in combination with low-dose dexamethasone in patients with triple-refractory (disease refractory to proteasome inhibitors (PI), immunomodulatory imid agents (IMiD), and anti-Cluster of Differentiation 38 (CD38) monoclonal antibodies (mAb)), or relapsed refractory multiple myeloma (RRMM). SLAMF7 (human Signaling Lymphocyte Activation Molecule Family 7) is a receptor that is present on immune cells, NK (Natural Killer) cells, and plasma cells. Elotuzumab, a mAb directed against the extracellular domain of SLAMF7, is used in combination with an IMiD and dexamethasone to treat RRMM. In this clinical trial, the investigators are proposing the addition of Elotuzumab to Selinexor and low-dose dexamethasone (ESd) in RRMM, previously treated with one or a combination of PI's, IMiD's, and anti-CD38 mAb.

Clinical Trial Description

Selinexor reversibly inhibits nuclear export of tumor suppressor proteins (TSPs) resulting in a pro-apoptotic effect. In addition, previous studies found that selinexor alone or in combination with anti-PD-L1 (Programmed Death-Ligand 1) antibody significantly increased the frequency of natural killer cells on immunophenotypic analysis of splenocytes by flow cytometry. Elotuzumab activates NK cells through SLAMF7 and results in NK cell-mediated antibody dependent cellular toxicity (ADCC.) This clinical trial is designed on the premise that these two medications could have a synergistic effect resulting in a better clinical response in the treatment of RRMM.

The investigators will evaluate the ORR (overall response rate), CR (Complete Response), VGPR (Very Good Partial Response), PR (Partial Response) rates and the duration of response. Special consideration will be given to multiple myeloma patients with t(11;14) (q13;q32), given it is the most common chromosome translocation in multiple myeloma with early reported activity of Selinexor on BCR (Breakpoint Cluster Region Protein) inhibition. Finally, the investigators will evaluate the correlation between NK function and the response rate to possibly develop a predictive model of response rate to the combination based on NK activity measurements, pre, during, and post treatment. Quantitative testing includes the number of NK (CD3-, CD56/16+) cells, NK subsets (CD56bright to CD56dim ratio) and qualitative testing includes chromium release assay (using 51Cr) for cytotoxicity testing. In addition, the investigators will follow the response of African American patients to this regimen in an ancillary, ad hoc study given the under representation in the STORM (Selinexor Treatment of Refractory Myeloma) trial. ;

Related Conditions & MeSH terms

• Multiple Myeloma
• Neoplasms, Plasma Cell
• Refractory Multiple Myeloma
• Relapsed Multiple Myeloma

• NCT number: NCT05170789
• Study type: Interventional
• Source: Tulane University
• Status: Withdrawn
• Phase: Phase 2
• Start date: April 27, 2022
• Completion date: April 27, 2022