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Abatacept, Ixazomib Citrate, and Dexamethasone in Treating Patients With Multiple Myeloma Resistant to Chemotherapy

Phase II Study of Targeting CD28 in Multiple Myeloma With Abatacept (CTLA4-Ig) to Overcome Resistance to Chemotherapy

Status
Terminated
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03457142
Enrollment
15
Registered
2018-03-07
Start date
2018-09-11
Completion date
2024-11-06
Last updated
2025-03-04

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 abatacept, ixazomib citrate, and dexamethasone work in treating patients with multiple myeloma that is resistant to chemotherapy. Abatacept may block certain proteins that are present on multiple myeloma cells that have been shown to protect against chemotherapy. Drugs used in chemotherapy, such as ixazomib citrate 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 abatacept, ixazomib citrate, and dexamethasone may work better at treating patients with multiple myeloma resistant to chemotherapy.

Detailed description

PRIMARY OBJECTIVES: I. To determine the therapeutic efficacy (as measured by response rate) of abatacept + ixazomib citrate (ixazomib) + dexamethasone in multiple myeloma patients who have relapsed (or who are primary refractory) following treatment with their first proteasome inhibitor-containing regimen (excluding ixazomib), compared to historical controls of ixazomib + dexamethasone. SECONDARY OBJECTIVES: I. To assess the toxicity profile of abatacept + ixazomib + dexamethasone in multiple myeloma patients who have relapsed (or who are primary refractory) following treatment with their first proteasome inhibitor-containing regimen, compared to historical controls of ixazomib + dexamethasone. II. To assess progression-free and overall survival profile of abatacept + ixazomib + dexamethasone in multiple myeloma patients who have relapsed (or who are primary refractory) following treatment with their proteasome inhibitor-containing regimen, compared to historical controls of ixazomib + dexamethasone. TERTIARY OBJECTIVES: I. Assess whether myeloma expression of CD28, CD86, serum kynurenine and/or IL-6 are correlated with specific clinical outcomes. OUTLINE: Patients receive abatacept intravenously (IV) over 30 minutes on day 1 of course 1, then subcutaneously (SC) on days 2, 8, 15, and 22 of course 1, and then on days 1, 8, 15, and 22 of subsequent courses. Patients also receive ixazomib citrate orally (PO) once daily (QD) on days 1, 8, and 15 and dexamethasone on days 1, 8, 15, and 22. Courses repeat every 28 days in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up at 30 days and then every 3 months thereafter.

Interventions

BIOLOGICALAbatacept

Given IV and SC

DRUGDexamethasone

Given PO

DRUGIxazomib Citrate

Given PO

OTHERLaboratory Biomarker Analysis

Correlative studies

Sponsors

Bristol-Myers Squibb
CollaboratorINDUSTRY
Roswell Park Cancer Institute
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

* Patients with multiple myeloma who have relapsed (or who are primary refractory) following treatment with a proteasome inhibitor-containing regimen (excluding ixazomib) and who have not been treated with a second proteasome inhibitor (ixazomib, bortezomib, carfilzomib or other proteasome inhibitor). * Have an Eastern Cooperative Oncology Group (ECOG) performance status of =\< 2 at study entry * Must be free of systemic infection: * Subjects with active infections (whether or not they require antibiotic therapy) may be eligible after complete resolution of the infection * Subjects on antibiotic therapy must be off antibiotics for at least 7 days before beginning treatment * Absolute neutrophil count \>= 750/mm\^3 * Platelet count \>= 25,000/mm\^3 * Creatinine clearance \>= 30 mL/min * Total bilirubin =\< 3 x upper limit of normal (ULN) * Aspartate aminotransferase (AST) (serum glutamic-oxaloacetic transaminase \[SGOT\]) and alanine aminotransferase (ALT) (serum glutamate pyruvate transaminase \[SGPT\]) =\< 3 x ULN * Patient's multiple myeloma cells are positive for CD28 or CD86 expression by flow cytometry or immunohistochemistry (in any proportion) CD28 or CD86 positivity can have been determined on previous bone marrow aspirates or biopsies * Disease free of prior malignancies for \> 2 years with exception of currently treated basal cell, squamous cell carcinoma of the skin, or carcinoma ?in situ? of the cervix or breast * Participants of child-bearing potential must agree to use adequate contraceptive methods (e.g., hormonal or barrier method of birth control; abstinence) prior to study entry; should a woman become pregnant or suspect she is pregnant while she or her partner is participating in this study, she should inform her treating physician immediately * Participant must understand the investigational nature of this study and sign an Independent Ethics Committee/Institutional Review Board approved written informed consent form prior to receiving any study related procedure

Exclusion criteria

* Prior treatment with ixazomib * Inability to take ixazomib or abatacept * Life expectancy less than 4 months * Patients with a known diagnosis of plasma cell leukemia * Known active tuberculosis or fungal infection * Known seropositive for or active viral infection with, human immunodeficiency virus (HIV), hepatitis B virus (HBV) or hepatitis C virus (HCV) * Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements * Any condition, including the presence of laboratory abnormalities, which places the subject at unacceptable risk if he/she were to participate in the study or, which confounds the ability to interpret data from the study * Pregnant or nursing female participants * Unwilling or unable to follow protocol requirements * Any condition which in the investigator?s opinion deems the participant an unsuitable candidate to receive study drug * Received an investigational agent within 30 days prior to enrollment

Design outcomes

Primary

MeasureTime frameDescription
Response Rate of Abatacept + Ixazomib Citrate + Dexamethasone in Multiple Myeloma Patients1 cycle of 28 daysWill be compared to historical controls of ixazomib citrate + dexamethasone. Responses to treatment will be measured by serum immunoglobulins, serum free kappa and lambda light chains, serum protein electrophoresis/immunofixation electrophoresis, and 24-hour urine protein electrophoresis/immunofixation. International uniform response criteria will be used. The anti-myeloma activity will be evaluated on an exploratory basis and will be summarized using descriptive statistics or graphical methods. No formal comparison will be carried forth.

Secondary

MeasureTime frameDescription
Incidence of Adverse Events Assessed Using National Cancer Institute Common Terminology Criteria for Adverse Events Version 4.0Up to 30 days after last doseThe adverse events and drug related toxicities will be summarized by grade using frequencies and relative frequencies. The rate of grade 3 or higher toxicities that are probably or definitely related to abatacept will be reported with 90% confidence intervals obtained using Jeffrey?s prior method.
Overall SurvivalFrom the date of the first study treatment until initiation of a new therapy, death, or end of follow-up (up to 5 years); whichever occurs first.Defined as the time from treatment initiation until death or last follow-up. Will be summarized using standard Kaplan-Meier methods; where estimates of median survival and survival rates will be obtained with 90% confidence intervals.
Progression-free SurvivalFrom the date of the first study treatment to the date of first observed disease progression or death due to any cause, assessed up to 5 yearsDefined as the time from treatment initiation until disease progression, death, or last follow-up. Will be summarized using standard Kaplan-Meier methods; where estimates of median survival and survival rates will be obtained with 90% confidence intervals.

Other

MeasureTime frameDescription
CD28 and CD86 Expression Assessed by Flow CytometryUp to 5 yearsThe expression/levels and response will be evaluated using logistic regression models.
Serum Kynurenine and IL-6 LevelsUp to 5 yearsThe association between CD28, CD86, serum kynurenine and IL-6 expression/levels and response will be evaluated using logistic regression models.

Countries

United States

Participant flow

Participants by arm

ArmCount
Treatment (Abatacept, Ixazomib Citrate, Dexamethasone)
Patients receive abatacept IV over 30 minutes on day 1 of course 1, then SC on days 2, 8, 15, and 22 of course 1, and then on days 1, 8, 15, and 22 of subsequent courses. Patients also receive ixazomib citrate PO QD on days 1, 8, and 15 and dexamethasone on days 1, 8, 15, and 22. Courses repeat every 28 days in the absence of disease progression or unacceptable toxicity. Abatacept: Given IV and SC Dexamethasone: Given PO Ixazomib Citrate: Given PO Laboratory Biomarker Analysis: Correlative studies
15
Total15

Withdrawals & dropouts

PeriodReasonFG000
Overall StudyDeath1

Baseline characteristics

CharacteristicTreatment (Abatacept, Ixazomib Citrate, Dexamethasone)
Age, Continuous64.2 years
STANDARD_DEVIATION 10.2
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
Race (NIH/OMB)
Asian
0 Participants
Race (NIH/OMB)
Black or African American
0 Participants
Race (NIH/OMB)
More than one race
0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
White
15 Participants
Region of Enrollment
United States
15 participants
Sex: Female, Male
Female
5 Participants
Sex: Female, Male
Male
10 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
1 / 15
other
Total, other adverse events
14 / 15
serious
Total, serious adverse events
1 / 15

Outcome results

Primary

Response Rate of Abatacept + Ixazomib Citrate + Dexamethasone in Multiple Myeloma Patients

Will be compared to historical controls of ixazomib citrate + dexamethasone. Responses to treatment will be measured by serum immunoglobulins, serum free kappa and lambda light chains, serum protein electrophoresis/immunofixation electrophoresis, and 24-hour urine protein electrophoresis/immunofixation. International uniform response criteria will be used. The anti-myeloma activity will be evaluated on an exploratory basis and will be summarized using descriptive statistics or graphical methods. No formal comparison will be carried forth.

Time frame: 1 cycle of 28 days

Population: 1 patient experienced death prior to disease response assessment.

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
Treatment (Abatacept, Ixazomib Citrate, Dexamethasone)Response Rate of Abatacept + Ixazomib Citrate + Dexamethasone in Multiple Myeloma PatientsComplete Response1 Participants
Treatment (Abatacept, Ixazomib Citrate, Dexamethasone)Response Rate of Abatacept + Ixazomib Citrate + Dexamethasone in Multiple Myeloma PatientsPartial Response4 Participants
Treatment (Abatacept, Ixazomib Citrate, Dexamethasone)Response Rate of Abatacept + Ixazomib Citrate + Dexamethasone in Multiple Myeloma PatientsStable Disease8 Participants
Treatment (Abatacept, Ixazomib Citrate, Dexamethasone)Response Rate of Abatacept + Ixazomib Citrate + Dexamethasone in Multiple Myeloma PatientsProgressive Disease1 Participants
Secondary

Incidence of Adverse Events Assessed Using National Cancer Institute Common Terminology Criteria for Adverse Events Version 4.0

The adverse events and drug related toxicities will be summarized by grade using frequencies and relative frequencies. The rate of grade 3 or higher toxicities that are probably or definitely related to abatacept will be reported with 90% confidence intervals obtained using Jeffrey?s prior method.

Time frame: Up to 30 days after last dose

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Treatment (Abatacept, Ixazomib Citrate, Dexamethasone)Incidence of Adverse Events Assessed Using National Cancer Institute Common Terminology Criteria for Adverse Events Version 4.05 Participants
90% CI: [0.17, 0.54]
Secondary

Overall Survival

Defined as the time from treatment initiation until death or last follow-up. Will be summarized using standard Kaplan-Meier methods; where estimates of median survival and survival rates will be obtained with 90% confidence intervals.

Time frame: From the date of the first study treatment until initiation of a new therapy, death, or end of follow-up (up to 5 years); whichever occurs first.

ArmMeasureValue (MEDIAN)
Treatment (Abatacept, Ixazomib Citrate, Dexamethasone)Overall Survival33.6 months
Secondary

Progression-free Survival

Defined as the time from treatment initiation until disease progression, death, or last follow-up. Will be summarized using standard Kaplan-Meier methods; where estimates of median survival and survival rates will be obtained with 90% confidence intervals.

Time frame: From the date of the first study treatment to the date of first observed disease progression or death due to any cause, assessed up to 5 years

ArmMeasureValue (MEDIAN)
Treatment (Abatacept, Ixazomib Citrate, Dexamethasone)Progression-free Survival11.1 months
Other Pre-specified

CD28 and CD86 Expression Assessed by Flow Cytometry

The expression/levels and response will be evaluated using logistic regression models.

Time frame: Up to 5 years

Population: These measurements were not collected and are not available for reporting.

Other Pre-specified

Serum Kynurenine and IL-6 Levels

The association between CD28, CD86, serum kynurenine and IL-6 expression/levels and response will be evaluated using logistic regression models.

Time frame: Up to 5 years

Population: These measurements were not collected and are not available for reporting.

Source: ClinicalTrials.gov · Data processed: Feb 9, 2026