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Smoldering Plasma Cell MyelomaPhase 2NCT04776395

Iberdomide Alone or in Combination With Dexamethasone for the Treatment of Intermediate- or High-Risk Smoldering Multiple Myeloma

A Phase 2 study testing Dexamethasone, Iberdomide Hydrochloride and Quality-of-Life Assessment in people with Smoldering Plasma Cell Myeloma, run by Emory University at 1 site in United States.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

This phase II trial studies the effects of iberdomide when given alone or in combination with dexamethasone in treating intermediate or high-risk smoldering multiple myeloma patients. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Smoldering Plasma Cell Myeloma
What is being tested?
Dexamethasone, Iberdomide Hydrochloride and Quality-of-Life Assessment
Could I receive a placebo?
No, everyone receives an active treatment
How many people
68 participants
Where
1 siteUnited States
Study dates
9 Jul 2021to 1 Sep 2029
Phase
Phase 2
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Subject must have intermediate- or high risk smoldering multiple myeloma (SMM) as confirmed by at least one of the following factors either at screening or within 28 days of screening:
  • Bone marrow clonal plasma cells >= 20% confirmed on either screening bone marrow biopsy or by outside pathology ≤5 years from initiation of study drug.
  • Abnormal serum free light chain ratio > 20 by serum free light chain (FLC) assay
  • Serum monoclonal protein >= 2 g/dL
  • Subject must have been diagnosed with SMM =< 5 years from initiation of study drug
  • Both men and women of all races and ethnic groups are eligible for this study
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  • Eastern Cooperative Oncology Group (ECOG) performance status 0-2 (Karnofsky >= 60%) is required for eligibility
  • Absolute neutrophil count (ANC) >= 1500/uL
  • Hemoglobin (Hgb) > 11 g/dL
  • Platelet count >= 100,000 cells/mm^3 and must be platelet and packed red blood cells (PRBC) transfusion independent with no granulocyte colony-stimulating factor (G-CSF) to ensure eligibility within 8 weeks of screening
  • Estimated creatinine clearance >= 30 mL/min as defined by Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) or Cockcroft-Gault
  • Total bilirubin < 2 mg/dL except in subjects with congenital bilirubinemia such as Gilbert syndrome, in which case direct bilirubin =< 2 times the institutional upper limit of normal is required
  • Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) < 2.5 times the institutional upper limit of normal
  • Left ventricular ejection fraction >= 40%
  • Females of childbearing potential (FCBP) must have two negative pregnancy tests as verified by the investigator prior to starting study treatment. The effects of Iberdomide on the developing human fetus are unknown. For this reason, women of child-bearing potential must agree to ongoing pregnancy testing during the course of the study, and after end of study treatment. This applies even if the subject practices true abstinence from heterosexual contact. A FCBP must either commit to true abstinence from heterosexual contact (which must be reviewed on a monthly basis and source documented) or agree to use, and be able to comply with two forms of contraception: one highly effective, and one additional effective (barrier) measure of contraception without interruption 28 days prior to starting investigational product, during the study treatment (including dose interruptions), and for at least 28 days after the last dose of iberdomide. 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
  • Female of childbearing potential (FCBP) is a sexually mature woman who:
  • Has not undergone a hysterectomy or bilateral oophorectomy; or
  • Has not been naturally postmenopausal for at least 24 consecutive months (i.e., has had menses at any time in the preceding 24 consecutive months)
  • The subject must be willing to comply with fertility requirements as below:
  • Male subjects must agree to use an adequate method of contraception for the duration of the study and for 3 months afterwards
  • Female subjects must be either postmenopausal, free from menses >= 2 years (yrs), surgically sterilized, willing to use two adequate barrier methods of contraception to prevent pregnancy, or agree to abstain from heterosexual activity starting with screening and for 3 months after last treatment in all patients
  • Patients must agree not to donate blood, sperm/ova while taking protocol therapy and for at least 4 weeks after stopping treatment
  • Subject must understand and voluntarily sign an informed consent form (ICF) prior to any study-related assessments/procedures being conducted
  • Subject is willing and able to adhere to the study visit schedule and other protocol requirements
  • Subjects with a prior or concurrent malignancy whose natural history or treatment does not have the potential to interfere with the safety or efficacy assessment of the investigational regimen are eligible for this trial

Who cannot join

  • Multiple myeloma requiring treatment as defined by SLiM-CRAB criteria
  • Monoclonal gammopathy of undetermined significance (MGUS), polyneuropathy, organomegaly, endocrinopathy, monoclonal gammopathy, and skin changes (POEMS syndrome), plasma cell leukemia, primary systemic light chain (AL) amyloidosis, or Waldenstroms macroglobulinemia
  • Concurrent intravenous bisphosphonate use more often than once a year
  • Prior or ongoing treatment for plasma cell disorder
  • Active hepatitis B or C due to risk of infection made worse by study drug
  • If subject has human immunodeficiency virus (HIV), they must have a CD4 count >= 350, no history of acquired immune deficiency syndrome-related illness, and not currently prescribed zidovudine or stavudine
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  • Subjects may be receiving concomitant low dose corticosteroids (e.g., prednisone up to but no more than 10 mg by mouth daily or its equivalent) for symptom management and comorbid conditions
  • Uncontrolled illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure (New York Heart Association [NYHA] class III or IV), unstable angina pectoris, cardiac arrhythmia, myocardial infarction in the preceding 6 months, or psychiatric illness/social situations that would limit compliance with study requirements
  • Subjects with gastrointestinal disease that may significantly alter the absorption of iberdomide
  • Pregnant women are excluded from this study because protocol therapy has the potential for teratogenic or abortifacient effects. Because there is an unknown but potential risk for adverse events in nursing infants secondary to protocol treatment of the mother, breastfeeding should be discontinued
  • Current or prior use of immunosuppressive medication within 14 days prior to the first dose of iberdomide. The following are exceptions to this criterion: intranasal, inhaled, topical or local steroid injections (e.g., intra-articular injection); systemic corticosteroids at physiologic doses that do not exceed 10 mg/day of prednisone or equivalent steroids as premedication for hypersensitivity reactions (e.g, computed tomography [CT] scan pre-medications)

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Nisha S. Joseph, MD contact

404-778-1900

nisha.sara.joseph@emory.edu

United States1 site, 1 recruiting
  • Emory University Hospital/Winship Cancer Institute

    Atlanta, Georgia, 30322

    Bryan Burton, 404-778-1780, bryan.james.burton@emory.edu

    Nisha S. Joseph, MD

    Recruiting

Other trials in United States

About this study

Official title: Iberdomide in Intermediate- and High-Risk Smoldering Myeloma (SMM) Patients: A Phase 2 Study With a Safety Run-in

This phase II trial studies the effects of iberdomide when given alone or in combination with dexamethasone in treating intermediate or high-risk smoldering multiple myeloma patients. Immunotherapy with iberdomide may induce changes in body's immune system and may interfere with the ability of cancer cells to grow and spread. Dexamethasone is a synthetic steroid (similar to steroid hormones produced naturally in the adrenal gland), and is used with other drugs in the treatment of some types of cancer. Giving iberdomide with dexamethasone my improve time to progression to symptomatic myeloma with improved tolerability.

Read the detailed description

PRIMARY OBJECTIVE:

  1. To determine the overall response rate (ORR) of iberdomide hydrochloride (iberdomide) and iberdomide with dexamethasone in intermediate- and high-risk smoldering multiple myeloma (SMM).

SECONDARY OBJECTIVES:

  1. To determine the 1- and 2- year progression free survival rates of patients receiving iberdomide with and without dexamethasone in intermediate-risk and high-risk smoldering myeloma.

II. To determine the time to progression, and overall survival of patients with intermediate- and high-risk smoldering myeloma receiving iberdomide with and without dexamethasone.

III. To study the risk of adverse hematologic and non-hematologic events observed in patients receiving iberdomide with and without dexamethasone for treatment of intermediate- and high-risk smoldering myeloma.

IV. To evaluate stem cell mobilization failure and early stem cell mobilization feasibility.

TERTIARY/EXPLORATORY OBJECTIVES:

  1. To assess the effects of iberdomide on cereblon targets Aiolos and Ikaros in natural killer (NK)- and T- cells.

II. To measure the effect of iberdomide with and without dexamethasone on T-cell and NK-cell counts and activation.

III. To determine the prognostic impact of high-risk cytogenetic abnormalities on clinical outcomes.

IV. To assess minimal residual disease (MRD) on bone marrow samples in subjects who achieved a complete response (CR) or better and evaluate the correlation between MRD status and clinical outcome measures.

  1. To assess the association between anti-tumor activity and immune cells in tumor and blood.

OUTLINE: Patients are randomized to 1 of 2 arms.

ARM A: Patients receive iberdomide hydrochloride orally (PO) once daily (QD) on days 1-21 and dexamethasone PO on days 1, 8, 15, and 22. Treatment repeats every 28 days for 4 cycles in the absence of disease progression or unacceptable toxicity. Patients then receive iberdomide hydrochloride PO QD on days 1-21. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.

ARM B: Patients receive iberdomide hydrochloride PO QD on days 1-21. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.

After completion of study treatment, patients are followed up for 4 weeks and then every 6 months thereafter.

Being tested
Dexamethasone, Iberdomide Hydrochloride, Quality-of-Life Assessment
Medical subject headings
Smoldering Multiple Myeloma

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • DexamethasoneDrug

    Also called Aacidexam, Adexone, Aknichthol Dexa, Alba-Dex

    Given PO

  • Iberdomide HydrochlorideDrug

    Also called CC-220 Hydrochloride

    Given PO

  • Quality-of-Life AssessmentOther

    Also called Quality of Life Assessment

    Ancillary studies

Study groups in NCT04776395
Study groupRoleWhat they receive
Arm A (iberdomide hydrochloride, dexamethasone)ExperimentalPatients receive iberdomide hydrochloride PO QD on days 1-21 and dexamethasone PO on days 1, 8, 15, and 22. Treatment repeats every 28 days for 4 cycles in the absence of disease progression or unacceptable toxicity. Patients then receive iberdomide hydrochloride PO QD on days 1-21. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.
Receives: Drug: Dexamethasone; Drug: Iberdomide Hydrochloride; Other: Quality-of-Life Assessment
Arm B (iberdomide hydrochloride)Active comparatorPatients receive iberdomide hydrochloride PO QD on days 1-21. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.
Receives: Drug: Dexamethasone; Drug: Iberdomide Hydrochloride; Other: Quality-of-Life Assessment

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Overall response rate

    Assessed per International Myeloma Working Group response criteria (to be done with serum and urine immunologic studies monthly; bone marrow biopsy and repeat imaging at either complete response or progressive disease).

    Measured: Up to 3 years

Secondary outcomes (5)
  1. Progression-free survival

    Will be estimated with the Kaplan-Meier method with 95% confidence interval (CI) for the two randomized arms separately and combined. Cox proportional hazards models will be further used to compare the two randomized arm with hazard ratio and its 95% CI reported.

    Measured: From start of protocol therapy to disease progression or death from any cause, whichever comes first, assessed at 1 and 2 years

  2. Time to progression

    Will be estimated with the Kaplan-Meier method with 95% CI for the two randomized arms separately and combined. Cox proportional hazards models will be further used to compare the two randomized arm with hazard ratio and its 95% CI reported.

    Measured: From start of protocol therapy to disease progression, assessed at 1 and 2 years

  3. Overall survival

    Will be estimated with the Kaplan-Meier method with 95% CI for the two randomized arms separately and combined. Cox proportional hazards models will be further used to compare the two randomized arm with hazard ratio and its 95% CI reported.

    Measured: From start of protocol therapy to death, censoring patients who are alive at last follow-up, assessed at 1 and 2 years

  4. Rate of grade 3-4 adverse events

    Adverse event data will be described and graded per the National Cancer Institute Common Terminology Criteria for Adverse Events guidelines. Grade 3-4 adverse events will be estimated as frequency and percentage, and then compared between the two patient groups using Chi-Square test.

    Measured: Up to 30 days after the last day of study participation

  5. Successful stem cell mobilization

    Defined as collection of 3.5 x 10^6 CD34 cells per kilogram weight.

    Measured: Up to 3 years

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted1 Mar 2021
  2. Study start9 Jul 2021
  3. Primary completion1 Sep 2027 (estimated)
  4. Study completion1 Sep 2029 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
68 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04776395
Sponsor's protocol ID
STUDY00001731
Other IDs
NCI-2020-08351, WINSHIP5157-20, P30CA138292
Status last verified
May 2026
First submitted
11 Feb 2021
Last updated
1 Jun 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Dexamethasone, Iberdomide Hydrochloride and Quality-of-Life Assessment in people with Smoldering Plasma Cell Myeloma, run by Emory University at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 25 inclusion and 11 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 1 Jun 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Nisha S. Joseph, MD (404-778-1900, nisha.sara.joseph@emory.edu), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Overall response rate (time frame: Up to 3 years). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 1 Jun 2026.

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