Cemsidomide plus elranatamab for relapsed or refractory multiple myeloma
Official title: A Phase 1B, Open-label, Multicenter Study to Evaluate the Safety and Preliminary Efficacy of Cemsidomide in Combination With Elranatamab in Relapsed/Refractory Multiple Myeloma Subjects
Run by C4 Therapeutics, Inc. · NCT07280013 · Data updated 2026-11-12
This will try giving cemsidomide pills together with elranatamab injections to see if the combination is safe and helps people with relapsed or refractory multiple myeloma.
Quick facts
| Phase | Phase 1 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 60 (estimated) |
| Sponsor | C4 Therapeutics, Inc. Industry-sponsored |
| Drugs / interventions | CAR-T, elranatamab |
| Locations | 19 sites (Gilbert, Arizona and 18 other locations) |
| Status | Recruiting |
| Started | February 6, 2026 |
| Main results expected | December 2028 |
| Study ends | June 2029 |
| Registry record updated | October 30, 2026 |
| Trial ID | NCT07280013 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are adults with measurable relapsed or refractory multiple myeloma, ECOG 0–2, and who have received the required prior lines of therapy (2–4 for escalation, 1–3 for expansion).
✕Probably not a fit
Patients who previously received BCMA-directed T-cell engagers or CAR-T therapy, have active uncontrolled infections, recent stem-cell transplant, or other excluded plasma cell disorders are unlikely to be eligible and thus may not benefit from this trial.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This Phase 1 study tests escalating oral doses of cemsidomide given 14 days on/14 days off in combination with subcutaneous elranatamab administered twice monthly to determine safety and tolerability in patients with relapsed or refractory multiple myeloma. The trial begins with a dose-escalation portion exploring about three dose levels of cemsidomide, followed by an expansion cohort at a selected safe dose to further evaluate tolerability and early anti-myeloma activity. Dexamethasone is given weekly for up to four cycles until a confirmed response, and participants must have measurable disease and meet prior-therapy requirements. Key exclusion criteria include prior BCMA-directed T-cell engager or CAR-T therapy, recent transplant, active uncontrolled infections, and certain plasma cell disorders.
Why it matters
Potential benefit: If successful, the combination could offer a new treatment option that controls disease for some patients who have relapsed or become refractory to prior therapies.
How similar studies have gone: Other early-phase studies of BCMA-targeting bispecific antibodies and combinations with cereblon modulators have shown promising response signals, but combining cemsidomide with elranatamab is a relatively new approach still under study.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Diagnosis of multiple myeloma as defined by IMWG criteria * Measurable disease based on IMWG criteria * Received 2-4 prior lines of therapy (escalation part) and 1-3 prior lines of therapy (expansion part) for multiple myeloma, consisting of at least 1 immunomodulatory drug (i.e., IKZF 1/3 degrader) * ECOG performance status 0-2 Exclusion Criteria: * Active plasma cell leukemia, Smoldering multiple myeloma, POEMS Syndrome, systemic light chain amyloidosis, MDS * Stem cell transplant within 12 weeks prior to enrollment or active graft vs host disease * Participants with any active, uncontrolled bacterial, fungal, or viral infection * Prior treatment with a BCMA-directed TCE or BCMA-directed CAR-T therapy * Administration with an investigational product within 30 days preceding the first dose of study intervention * Inability or difficulty swallowing tablets, malabsorption syndrome, or any disease or medical condition significantly affecting gastrointestinal function
Where it's running
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Banner MD Anderson Cancer Center
Gilbert, Arizona, United States Recruiting -
UC Davis Comprehensive Cancer Center
Sacramento, California, United States Recruiting -
UCLA Health, Jonsson Comprehensive Cancer Center
Santa Monica, California, United States Recruiting -
Winship Cancer Institute, Emory University
Atlanta, Georgia, United States Recruiting -
Norton Cancer Institute St. Matthews
Louisville, Kentucky, United States Recruiting -
University of Maryland Greenbaum Comprehensive Cancer Center
Baltimore, Maryland, United States Recruiting
Show 13 more locations
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START Midwest
Grand Rapids, Michigan, United States Recruiting -
Dartmouth-Hitchcock Medical Center
Lebanon, New Hampshire, United States Recruiting -
Perlmutter Cancer Center at NYU Langone Hospital
Brooklyn, New York, United States Recruiting -
Memorial Sloan Kettering Cancer Center
New York, New York, United States Recruiting -
Duke Cancer Center
Durham, North Carolina, United States Recruiting -
Houston Methodist Hospital
Houston, Texas, United States Recruiting -
University of Miami
Miami, Florida, United States Not yet recruiting -
Loyola University Medical Center
Maywood, Illinois, United States Not yet recruiting -
Indiana University
Indianapolis, Indiana, United States Not yet recruiting -
University of Nebraska
Omaha, Nebraska, United States Not yet recruiting -
Ohio State University Comprehensive Cancer Center
Columbus, Ohio, United States Not yet recruiting -
Baylor University Medical Center
Dallas, Texas, United States Not yet recruiting -
Huntsman Cancer Institute, University of Utah
Salt Lake City, Utah, United States Not yet recruiting
Study contacts
- Study coordinator: Study Medical Officer
- Email: clinicaltrials@c4therapeutics.com
- Phone: (617) 231-0700
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.