This phase I/II trial studies the best dose and side effects of ibrutinib when given together with lenalidomide and dexamethasone and how well they work in treating patients with multiple myeloma that are not eligible for transplant. Ibrutinib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Drugs used in chemotherapy, such as lenalidomide and dexamethasone, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Giving ibrutinib, lenalidomide, and dexamethasone may work better in treating patients with multiple myeloma.
PRIMARY OBJECTIVES: I. To determine the maximum tolerated dose (MTD) of ibrutinib that can be combined with lenalidomide and dexamethasone in relapsed multiple myeloma (MM) patients. (Phase I) II. To estimate the overall response rate (ORR) including partial response (PR) or better of the combination of ibrutinib, lenalidomide, and dexamethasone in subjects with newly diagnosed MM who are not candidates for high dose chemotherapy and autologous stem cell transplantation (ASCT). (Phase II) SECONDARY OBJECTIVES: I. To evaluate the safety profile of this regimen in relapsed MM patients. (Phase I) II. To evaluate the progression free survival (PFS) of the combination of ibrutinib, lenalidomide, and dexamethasone in MM patients. (Phase II) III. To evaluate the safety profile of this regimen in untreated MM patients. (Phase II) IV. To evaluate the duration of response for patients treated with this 3-drug regimen. (Phase II) V. To evaluate overall survival (OS) for patients treated with this 3-drug regimen. (Phase II) EXPLORATORY OBJECTIVES: I. To explore compliance to treatment. II. To assess effects of treatment on patient-reported quality of life (QoL) measures. CORRELATIVE RESEARCH OBJECTIVES: I. To determine the role of members of the BTK signalosome in achievement or lack thereof of response to ibrutinib. II. To explore biologic effects of ibrutinib on microenvironment in MM and correlate with response to treatment. III. To evaluate pharmacodynamic measures including receptor occupancy for BTK prior to introducing lenalidomide in patients treated with ibrutinib and dexamethasone. IV. To evaluate the impact of ibrutinib on platelet aggregation. OUTLINE: This is a phase I, dose-escalation study of ibrutinib followed by a phase II study. PHASE I: Patients receive ibrutinib orally (PO) on days 1-28, lenalidomide PO on days 1-21, and dexamethasone PO on days 1, 8, 15, and 22. Treatment repeats every 28 days for up to 24 courses in the absence of disease progression or unacceptable toxicity. Beginning course 25, patients receive lenalidomide PO on days 1-21 and dexamethasone PO on days 1, 8, 15, and 22. Courses repeat every 84 days in the absence of disease progression or unacceptable toxicity. PHASE II: Patients receive ibrutinib and dexamethasone as in phase I and lenalidomide PO on days 1-21 beginning course 2. Beginning course 25, patients receive lenalidomide and dexamethasone as in phase I. After completion of study treatment, patients are followed up every 3 months, then every 6 months for up to 3 years.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
18
Given PO
Given PO
Correlative studies
Given PO
Correlative studies
Ancillary studies
Mayo Clinic in Florida
Jacksonville, Florida, United States
Maximum tolerated dose (MTD) defined as the dose level below the lowest dose that induces dose-limiting toxicity in at least one-third of patients assessed by Common Terminology Criteria for Adverse Events (CTCAE) version (v) 4.0 (Phase I)
Time frame: Up to 28 days
Rate of confirmed response defined as patient who has achieved a stringent (s) complete response (CR), CR, very good partial response (VGPR), or partial response (PR) on two consecutive evaluations at any time during treatment (Phase II)
Response will be evaluated using all cycles of treatment. Responses will be summarized by simple descriptive summary statistics delineating depth of response as well as stable and progressive disease in this patient population. Ninety-five percent confidence intervals for the true success proportion will be calculated according to the approach of Duffy and Santner.
Time frame: Up to 3 years
Progression-free survival (Phase II)
The distribution of progression-free survival will be estimated using the method of Kaplan-Meier.
Time frame: From registration to the time of progression or death due to any cause, assessed up to 3 years
Overall survival (Phase II)
The distribution of survival time will be estimated using the method of Kaplan-Meier.
Time frame: From registration to death due to any cause, assessed up to 3 years
Duration of response (Phase II)
The distribution of duration of response will be estimated using the method of Kaplan-Meier.
Time frame: The date at which the patient's objective status is first noted to be a sCR, CR, VGPR, or PR to the earliest date progression is documented, assessed up to 3 years
Incidence of adverse events assessed by CTCAE v 4.0 (Phase II)
The number and severity of all adverse events (overall and by dose-level) will be tabulated and summarized in this patient population. The grade 3+ adverse events will also be described and summarized in a similar fashion. Overall toxicity incidence as well as toxicity profiles by dose level and patient will be explored and summarized. Frequency distributions, graphical techniques and other descriptive measures will form the basis of these analyses.
Time frame: Up to 30 days after last dose of study treatment
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