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Ixazomib Citrate in Treating Patients With Relapsed Multiple Myeloma That Is Not Refractory to Bortezomib

Phase 2 Trial of Ixazomib Combinations in Patients With Relapsed Multiple Myeloma

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT01415882
Enrollment
165
Registered
2011-08-12
Start date
2012-01-31
Completion date
2025-04-30
Last updated
2026-06-23

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Recurrent Plasma Cell Myeloma, Refractory Plasma Cell Myeloma

Brief summary

This phase II trial studies how well ixazomib citrate works in treating patients with multiple myeloma that has returned after a period of improvement (relapsed) but is not resistant to bortezomib (refractory). Ixazomib citrate may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth.

Detailed description

PRIMARY OBJECTIVES: I. To determine the confirmed overall response rate (\>= partial response \[PR\]) of ixazomib \[ixazomib citrate\], used as a single agent in patients with relapsed multiple myeloma, who are proteasome inhibitor naive (including bortezomib) naive OR have received less than 6 cycles of therapy with bortezomib and had a better than PR with no progression at the time of discontinuation. (Arm A - Permanently closed to accrual as of Addendum 5) II. To determine the confirmed overall response rate (\>= PR) of ixazomib at a 4 mg dose level in combination with dexamethasone in patients with relapsed multiple myeloma, who are proteasome inhibitor naive (including bortezomib) naive OR have received less than 6 cycles of therapy with bortezomib and had a better than PR with no progression at the time of discontinuation. (Arm B) III. To determine the confirmed overall response rate (\>= PR) of ixazomib at a 5.5 mg dose level in combination with dexamethasone in patients with relapsed multiple myeloma, who are proteasome inhibitor naive (including bortezomib) naive OR have received less than 6 cycles of therapy with bortezomib and had a better than PR with no progression at the time of discontinuation. (Arm C) IV. To determine the confirmed overall response rate (\>= PR) of ixazomib in combination with cyclophosphamide and dexamethasone in patients with relapsed multiple myeloma, who are proteasome inhibitor naive (including bortezomib) naive OR have received less than 6 cycles of therapy with bortezomib and had a better than PR with no progression at the time of discontinuation. (Arm D) V. To determine the confirmed overall response rate (\>= PR) of ixazomib in combination with cyclophosphamide, daratumumab, and dexamethasone in patients with relapsed multiple myeloma. (Arm E) SECONDARY OBJECTIVES: I. To determine the overall response rate of ixazomib in combination with dexamethasone, when dexamethasone is added to ixazomib for lack of response or for progression. (Arm A) II. To determine the event free survival and overall survival among patients with relapsed myeloma following treatment with ixazomib with dexamethasone added for lack of response or progression. (Arm A) III. To determine the event free survival and overall survival among patients with relapsed myeloma following treatment with ixazomib at two different doses, in combination with dexamethasone. (Arms B and C) IV. To determine the event free survival and overall survival among patients with relapsed myeloma following treatment with ixazomib in combination with cyclophosphamide and dexamethasone. (Arm D) V. To determine the event free survival and overall survival among patients with relapsed myeloma following treatment with ixazomib in combination with cyclophosphamide, daratumumab, and dexamethasone. (Arm E) OUTLINE: Patients are randomized to 1 of 4 treatment arms (Arm A permanently closed to accrual as of Addendum 5). ARM A: Patients receive ixazomib citrate orally (PO) on days 1, 8, and 15. Patients with lack of minor response by the end of the second cycle or lack of partial response by the end of the fourth cycle also receive dexamethasone PO on days 1, 2, 8, 9, 15, and 16. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. ARM B: Patients receive ixazomib citrate PO on days 1, 8, and 15 and dexamethasone PO on days 1, 8, and 15. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. ARM C: Patients receive higher dose of ixazomib citrate PO on days 1, 8, and 15 and dexamethasone PO on days 1, 8, and 15. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. ARM D: Patients receive ixazomib citrate PO on days 1, 8, and 15 and cyclophosphamide PO (cycles 1-18 only) and dexamethasone PO on days 1, 8, 15, and 22. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. ARM E: Patients receive ixazomib citrate PO on days 1, 8, and 15, cyclophosphamide PO (cycles 1-12 only) on days 1, 8, 15, 22, and daratumumab intravenously (IV) on days 1, 8, 15, 22 (cycles 1-2), days 1 and 15 (cycles 3-6), and day 1 in all subsequent cycles. Patients also receive dexamethasone IV or PO on days 1, 8, 15, and 22. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up every 6 or 12 months for 2 years.

Interventions

DRUGCyclophosphamide

Given PO

BIOLOGICALDaratumumab

Given IV

DRUGDexamethasone

Given PO or IV

DRUGIxazomib Citrate

Given PO

OTHERLaboratory Biomarker Analysis

Correlative studies

Sponsors

Mayo Clinic
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Calculated creatinine clearance (using Cockcroft-Gault equation) \>= 30 mL/min (obtained =\< 14 days prior to registration) * Absolute neutrophil count \>= 1000/mL (obtained =\< 14 days prior to registration) * Untransfused platelet count \>= 75000/mL (obtained =\< 14 days prior to registration) * Hemoglobin \>= 8.0 g/dL (obtained =\< 14 days prior to registration) * Total bilirubin =\< 1.5 x the upper limit of the normal range (ULN) (obtained =\< 14 days prior to registration) * Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) =\< 3 x ULN (obtained =\< 14 days prior to registration) * Patients with relapsed multiple myeloma who have already received one or more standard treatment regimens * Measurable disease of multiple myeloma as defined by at least ONE of the following: * Serum monoclonal protein \>= 1.0 g/dL * \>= 200 mg of monoclonal protein in the urine on 24 hour electrophoresis * Serum immunoglobulin free light chain \>= 10 mg/dL AND abnormal serum immunoglobulin kappa to lambda free light chain ratio * For patients with extramedullary disease (EMD) measurable disease by computed tomography (CT) or magnetic resonance imaging (MRI) or the CT portion of the positron emission tomography (PET)/CT: Must have at least one lesion that has a single diameter of \>= 2 cm. Skin lesions can be used if the area is \>= 2 cm in at least one diameter and measured with a ruler * Plasma cell count \>= 0.5 x 10\^9/L or 5 percent of the peripheral blood white cells * Plasma cell count if determined by flow cytometry, \>= 200/150,000 events * Eastern Cooperative Oncology Group (ECOG) performance status (PS) 0, 1, 2 * Provide informed written consent * Negative pregnancy test done =\< 7 days prior to registration, for women of childbearing potential only * Willing to return to consenting Mayo Clinic institution for follow-up during the Active Monitoring Phase of the study; Note: during the Active Monitoring Phase of a study (i.e., active treatment and observation), participants must be willing to return to the consenting institution for follow-up * Recovered (i.e., \< grade 1 toxicity) from the reversible effects of prior antineoplastic therapy * Arms A - D only: Patients should be proteasome inhibitor naive (including bortezomib and carfilzomib) OR have received less than 6 cycles of therapy with a bortezomib or carfilzomib containing regimen and were not refractory to the bortezomib or carfilzomib based regimen (less than a PR or progression on or within 60 days of discontinuation) * Arm E only: Negative hepatitis B test (defined by a negative test for hepatitis B surface antigen \[HBsAg\], or antibodies to hepatitis B surface and/or core antigens \[antiHBs or antiHBc\]) (added as of addendum 9); Note: patients with serologic findings suggestive of hepatitis B virus (HBV) vaccination (antiHBs positivity as the only serologic marker) AND a known history of prior HBV vaccination do not need to be tested for HBV deoxyribonucleic acid (DNA) by polymerase chain reaction (PCR); those who are PCR positive will be excluded

Exclusion criteria

* Recent prior chemotherapy: * Alkylators (e.g. melphalan, cyclophosphamide) =\< 14 days prior to registration * Anthracyclines =\< 14 days prior to registration * High dose corticosteroids, immune modulatory drugs (thalidomide or lenalidomide) =\< 7 days prior to registration * Prior therapy with any proteasome inhibitor other than bortezomib, carfilzomib, or ixazomib * Concomitant high dose corticosteroids other than what is part of treatment protocol (concurrent use of corticosteroids); EXCEPTION: patients may be on chronic steroids (maximum dose 20 mg/day prednisone equivalent) if they are being given for disorders other than myeloma, i.e., adrenal insufficiency, rheumatoid arthritis, etc * Diagnosed or treated for another malignancy within 2 years before study enrollment or previously diagnosed with another malignancy and have any evidence of residual disease; patients with nonmelanoma skin cancer or carcinoma in situ of any type are not excluded if they have undergone complete resection * Any of the following: * Pregnant women or women of reproductive ability who are unwilling to use 2 effective methods of contraception from the time of signing the informed consent form through 90 days after the last dose of study drug * Nursing women * Men who are unwilling to use a condom (even if they have undergone a prior vasectomy) while having intercourse with any woman, while taking the drug and for 30 days after stopping treatment * Other co-morbidity which would interfere with patient's ability to participate in trial, e.g. uncontrolled infection, uncompensated heart or lung disease * Other concurrent chemotherapy, radiotherapy, or any ancillary therapy considered investigational; NOTE: bisphosphonates are considered to be supportive care rather than therapy, and are thus allowed while on protocol treatment * Patient has \>= grade 3 peripheral neuropathy, or grade 2 with pain on clinical examination during the screening period * Major surgery within 14 days before study registration * Systemic treatment with strong inhibitors of cytochrome P450, family 1, subfamily A (CYP3A) inducers (rifampin, rifapentine, rifabutin, carbamazepine, phenytoin, phenobarbital), or use of Ginkgo biloba or St. John's wort within 14 days before the first dose of study treatment * Evidence of current uncontrolled cardiovascular conditions, including cardiac arrhythmias, congestive heart failure, angina, or myocardial infarction within the past 6 months; Note: prior to study entry, any electrocardiogram (ECG) abnormality at screening must be documented by the investigator as not medically relevant * Known human immunodeficiency virus (HIV) positive * Known hepatitis B surface antigen-positive status, or known or suspected active hepatitis C infection * Any serious medical or psychiatric illness that could, in the investigator's opinion, potentially interfere with the completion of treatment according to this protocol * Known allergy to any of the study medications, their analogues or excipients in the various formulations * Known gastrointestinal (GI) disease or GI procedure that could interfere with the oral absorption or tolerance of ixazomib including difficulty swallowing * Diarrhea \> grade 1, based on the National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) grading, in the absence of antidiarrheals * Arm E only: Refractory to any combination of a proteasome inhibitor and daratumumab * Arm E only: Known chronic obstructive pulmonary disease with a forced expiratory volume in 1 second (FEV1) \< 50% of predicted normal. (Note that FEV1 testing is required for subjects suspected of having chronic obstructive pulmonary disease and subjects must be excluded if FEV1 \< 50% of predicted normal.) * Arm E only: Known moderate or severe persistent asthma within the past 2 years or currently has uncontrolled asthma of any classification

Design outcomes

Primary

MeasureTime frameDescription
Proportion of Confirmed Responses With Ixazomib Citrate Alone (Arm A [Closed]), Ixazomib Citrate With Dexamethasone (Arms B + C), or With Dexamethasone and Cyclophosphamide (Arm D), or With Dexamethasone, Cyclophosphamide, Daratumumab (Arm E)2.5 yearsA confirmed response is defined as stringent complete response, complete response (CR), very good partial response, or partial response (PR) noted as the objective status on 2 separate evaluations while receiving ixazomib citrate with or without dexamethasone. The proportion of successes will be estimated by the number of successes divided by the total number of evaluable patients. 95% confidence intervals for the true success proportion will be calculated by the exact binomial method.

Secondary

MeasureTime frameDescription
Confirmed Response Rate With the Addition of Dexamethasone (Arm A Only)2.5 yearsEstimated by the number of patients who achieve a confirmed response at any time (with single agent ixazomib citrate or ixazomib citrate plus dexamethasone) divided by the number of evaluable patients. 95% confidence intervals for the true confirmed response rate will be calculated by the exact binomial method.
Overall Survival2.5 yearsThe distribution of survival time will be estimated using the method of Kaplan-Meier.
Event-free SurvivalFrom registration to disease progression while receiving ixazomib citrate and dexamethasone, death due to any cause, or subsequent treatment for multiple myeloma, assessed up to 2.5 yearsDate of progression will be defined as the date that the criteria for progressive disease were first met after initiation of dexamethasone. The distribution of event-free survival will be estimated using the method of Kaplan-Meier.
Incidence of Adverse Events2.5 yearsGraded according to National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) version 3.0. The maximum grade for each type of adverse event, regardless of causality, will be recorded. The percentage of patients that experience a grade 3 or higher adverse event will be reported by arm.

Countries

United States

Contacts

PRINCIPAL_INVESTIGATORShaji K. Kumar, M.D.

Mayo Clinic in Rochester

Participant flow

Participants by arm

ArmCount
Arm A (Ixazomib Citrate and Dexamethasone, Closed to Accrual)
Patients receive ixazomib citrate PO on days 1, 8, and 15. Patients with lack of minor response by the end of the second cycle or lack of partial response by the end of the fourth cycle also receive dexamethasone PO on days 1, 2, 8, 9, 15, and 16. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.
33
Arm B (Ixazomib Citrate and Dexamethasone)
Patients receive ixazomib citrate PO on days 1, 8, and 15 and dexamethasone PO on days 1, 8, and 15. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.
36
Arm C (Higher-dose Ixazomib Citrate and Dexamethasone)
Patients receive higher doses of ixazomib citrate PO on days 1, 8, and 15 and dexamethasone PO on days 1, 8, and 15. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.
35
Arm D (Ixazomib Citrate, Dexamethasone, and Cyclophosphamide)
Patients receive ixazomib citrate PO on days 1, 8, and 15 and cyclophosphamide PO (cycles 1-18 only) and dexamethasone PO on days 1, 8, 15, and 22. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.
37
Arm E (Ixazomib Citrate, Cyclophosphamide, Daratumumab)
Patients receive ixazomib citrate PO on days 1, 8, and 15, cyclophosphamide PO (cycles 1-12 only) on days 1, 8, 15, 22, and daratumumab IV on days 1, 8, 15, 22 (cycles 1-2), days 1 and 15 (cycles 3-6), and day 1 in all subsequent cycles. Patients also receive dexamethasone IV or PO on days 1, 8, 15, and 22. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.
24
Total165

Baseline characteristics

CharacteristicArm A (Ixazomib Citrate and Dexamethasone, Closed to Accrual)Arm B (Ixazomib Citrate and Dexamethasone)Arm C (Higher-dose Ixazomib Citrate and Dexamethasone)Arm D (Ixazomib Citrate, Dexamethasone, and Cyclophosphamide)Arm E (Ixazomib Citrate, Cyclophosphamide, Daratumumab)Total
Age, Continuous66.3 years
STANDARD_DEVIATION 9.4
70.0 years
STANDARD_DEVIATION 8.4
67.8 years
STANDARD_DEVIATION 7.9
69.1 years
STANDARD_DEVIATION 10.6
68.1 years
STANDARD_DEVIATION 8.7
68.3 years
STANDARD_DEVIATION 9.1
Ethnicity (NIH/OMB)
Hispanic or Latino
2 Participants1 Participants2 Participants1 Participants0 Participants6 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
30 Participants34 Participants32 Participants36 Participants24 Participants156 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
1 Participants1 Participants1 Participants0 Participants0 Participants3 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants0 Participants0 Participants1 Participants0 Participants1 Participants
Race (NIH/OMB)
Black or African American
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
33 Participants36 Participants35 Participants36 Participants24 Participants164 Participants
Sex: Female, Male
Female
15 Participants19 Participants13 Participants15 Participants6 Participants68 Participants
Sex: Female, Male
Male
18 Participants17 Participants22 Participants22 Participants18 Participants97 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
EG004
affected / at risk
deaths
Total, all-cause mortality
5 / 335 / 354 / 358 / 366 / 24
other
Total, other adverse events
33 / 3335 / 3535 / 3536 / 3624 / 24
serious
Total, serious adverse events
16 / 3311 / 3511 / 3514 / 3614 / 24

Outcome results

Primary

Proportion of Confirmed Responses With Ixazomib Citrate Alone (Arm A [Closed]), Ixazomib Citrate With Dexamethasone (Arms B + C), or With Dexamethasone and Cyclophosphamide (Arm D), or With Dexamethasone, Cyclophosphamide, Daratumumab (Arm E)

A confirmed response is defined as stringent complete response, complete response (CR), very good partial response, or partial response (PR) noted as the objective status on 2 separate evaluations while receiving ixazomib citrate with or without dexamethasone. The proportion of successes will be estimated by the number of successes divided by the total number of evaluable patients. 95% confidence intervals for the true success proportion will be calculated by the exact binomial method.

Time frame: 2.5 years

Population: All eligible patients that received treatment and a disease evaluation.

ArmMeasureValue (NUMBER)
Arm A (Ixazomib Citrate and Dexamethasone)Proportion of Confirmed Responses With Ixazomib Citrate Alone (Arm A [Closed]), Ixazomib Citrate With Dexamethasone (Arms B + C), or With Dexamethasone and Cyclophosphamide (Arm D), or With Dexamethasone, Cyclophosphamide, Daratumumab (Arm E)0.1563 proportion of participants
Arm B (Ixazomib Citrate and Dexamethasone)Proportion of Confirmed Responses With Ixazomib Citrate Alone (Arm A [Closed]), Ixazomib Citrate With Dexamethasone (Arms B + C), or With Dexamethasone and Cyclophosphamide (Arm D), or With Dexamethasone, Cyclophosphamide, Daratumumab (Arm E)0.3143 proportion of participants
Arm C (Higher-dose Ixazomib Citrate and Dexamethasone)Proportion of Confirmed Responses With Ixazomib Citrate Alone (Arm A [Closed]), Ixazomib Citrate With Dexamethasone (Arms B + C), or With Dexamethasone and Cyclophosphamide (Arm D), or With Dexamethasone, Cyclophosphamide, Daratumumab (Arm E)0.5429 proportion of participants
Arm D (Ixazomib Citrate, Dexamethasone, and Cyclophosphamide)Proportion of Confirmed Responses With Ixazomib Citrate Alone (Arm A [Closed]), Ixazomib Citrate With Dexamethasone (Arms B + C), or With Dexamethasone and Cyclophosphamide (Arm D), or With Dexamethasone, Cyclophosphamide, Daratumumab (Arm E)0.6667 proportion of participants
Arm E (Ixazomib Citrate, Cyclophosphamide, Daratumumab)Proportion of Confirmed Responses With Ixazomib Citrate Alone (Arm A [Closed]), Ixazomib Citrate With Dexamethasone (Arms B + C), or With Dexamethasone and Cyclophosphamide (Arm D), or With Dexamethasone, Cyclophosphamide, Daratumumab (Arm E)0.750 proportion of participants
Secondary

Confirmed Response Rate With the Addition of Dexamethasone (Arm A Only)

Estimated by the number of patients who achieve a confirmed response at any time (with single agent ixazomib citrate or ixazomib citrate plus dexamethasone) divided by the number of evaluable patients. 95% confidence intervals for the true confirmed response rate will be calculated by the exact binomial method.

Time frame: 2.5 years

ArmMeasureValue (NUMBER)
Arm A (Ixazomib Citrate and Dexamethasone)Confirmed Response Rate With the Addition of Dexamethasone (Arm A Only)0.3438 proportion of participants
Secondary

Event-free Survival

Date of progression will be defined as the date that the criteria for progressive disease were first met after initiation of dexamethasone. The distribution of event-free survival will be estimated using the method of Kaplan-Meier.

Time frame: From registration to disease progression while receiving ixazomib citrate and dexamethasone, death due to any cause, or subsequent treatment for multiple myeloma, assessed up to 2.5 years

ArmMeasureValue (MEDIAN)
Arm A (Ixazomib Citrate and Dexamethasone)Event-free Survival11.5 Months
Arm B (Ixazomib Citrate and Dexamethasone)Event-free Survival8.4 Months
Arm C (Higher-dose Ixazomib Citrate and Dexamethasone)Event-free Survival7.8 Months
Arm D (Ixazomib Citrate, Dexamethasone, and Cyclophosphamide)Event-free Survival18.8 Months
Arm E (Ixazomib Citrate, Cyclophosphamide, Daratumumab)Event-free Survival29.5 Months
Secondary

Incidence of Adverse Events

Graded according to National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) version 3.0. The maximum grade for each type of adverse event, regardless of causality, will be recorded and reported for each patient, and frequency tables will be reviewed to determine adverse event patterns.

Time frame: Up to 30 days after the last day of study drug treatment

Secondary

Overall Survival

The distribution of survival time will be estimated using the method of Kaplan-Meier.

Time frame: 2.5 years

Population: All eligible patients that started treatment.

ArmMeasureValue (MEDIAN)
Arm A (Ixazomib Citrate and Dexamethasone)Overall SurvivalNA Months
Arm B (Ixazomib Citrate and Dexamethasone)Overall SurvivalNA Months
Arm C (Higher-dose Ixazomib Citrate and Dexamethasone)Overall SurvivalNA Months
Arm D (Ixazomib Citrate, Dexamethasone, and Cyclophosphamide)Overall SurvivalNA Months
Arm E (Ixazomib Citrate, Cyclophosphamide, Daratumumab)Overall SurvivalNA Months

Source: ClinicalTrials.gov · Data processed: Jun 24, 2026