This randomized phase II trial studies how well lenalidomide alone compared to lenalidomide, ixazomib citrate, and dexamethasone work in treating patients with multiple myeloma that remains (residual) after donor stem cell transplant. Lenalidomide may help the immune system kill abnormal blood cells or cancer cells and may also prevent the growth of new blood vessels that are needed for cancer growth. Ixazomib citrate may stop the growth of cancer cells by interfering with proteins necessary for cell growth. Drugs used in chemotherapy, such as dexamethasone, work in different ways to stop the growth of cancer cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. It is not yet known whether lenalidomide is more effective with or without ixazomib citrate and dexamethasone in treating residual multiple myeloma.
PRIMARY OBJECTIVES: I. To determine the rate of minimal residual disease (MRD)-negative disease by multiparameter-flow cytometry at 12 months after randomization. SECONDARY OBJECTIVES: I. Evidence of response as demonstrated by the improvement of the depth of response by at least one category according to International Myeloma Working Group (IMWG) response criteria. II. Progression free survival (PFS). III. Overall survival (OS). IV. Duration of MRD-negative disease. V. Safety and tolerability of experimental arm (ixazomib citrate, lenalidomide, and low dose dexamethasone \[IRd\]) vs. control arm (lenalidomide \[Rd\]). TERTIARY OBJECTIVES: I. Determination of markers of response based on pre-treatment characteristics using methods described in correlative research. II. Evaluation of MRD by gene sequencing method using the Sequenta platform (LymphoSIGHT®) in parallel with multi-parameter flow cytometry (MFC). OUTLINE: Patients are randomized to 1 of 2 treatment arms. ARM I: Patients receive ixazomib citrate orally (PO) on days 1, 8, and 15, lenalidomide PO once daily (QD) on days 1-21, and dexamethasone PO on days 1, 8, 15, and 22 (of courses 1-4 only). ARM II: Patients receive lenalidomide PO as in Arm I. In both arms, treatment repeats every 28 days for 12 courses in the absence of disease progression or unacceptable toxicity. After the completion of treatment, patients are followed up at 30 days and then every 3 months for 2 years.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
42
University of Chicago
Chicago, Illinois, United States
Percentage of Participants With MRD Negativity
Rate of MRD negativity after 12 months of treatment with Ixazomib in combination with lenalidomide and dexamethasone compared to MRD negativity rate after 12 months of lenalidomide alone. For the majority of patients, where MRD positivity at screening will be determined by Multi-parameter Flow Cytometry (MFC), an improvement will be defined as a conversion from MRD-positive to MRD-negative disease by MFC. Additionally, in the fraction of patients with MRD-negative disease by MFC at screening, who were MRD-positive by Next Generation Sequencing (NGS), an improvement will be defined as a conversion from MRD-positive to MRD-negative disease by NGS
Time frame: At 12 months
Overall Response (Number of Participants With VGPR, CR, sCR)
Overall response was defined according to IMWG criteria as 1. very good partial response (VGPR) 2. complete response (CR) 3. stringent complete response (sCR)
Time frame: At 6 months
Duration of MRD-negative Disease
Duraion of MRD-negativie disease was defined as the duration from the date of MRD negative to the date of diseae progression or date of last clinical follow up.
Time frame: every 28 days, up to 2 years
Progression Free Survival
Time to event will be estimated using the product-limit method of Kaplan and Meier.
Time frame: up to 2 years
Overall Survival
OS is the time from randomization date to death date. Participants who have not died will be censored on the last date they are known to be alive.
Time frame: Up to 2 years
Number of Patients With Adverse Events
Graded by the National Cancer Institute Common Terminology Criteria for Adverse Events version 4.0
Time frame: Up to 30 days post-treatment, **up to 2 years**
Overall Response (Number of Participants With VGPR, CR, sCR)
Overall response was defined according to IMWG criteria as 1. very good partial response (VGPR) 2. complete response (CR) 3. stringent complete response (sCR)
Time frame: At 12 months
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