What the trial was testing
The trial enrolled 50 patients with multiple myeloma. The study was sponsored by Millennium Pharmaceuticals and tracked outcomes across the full group of patients who matched the trial's eligibility profile.
It was an early-stage trial — researchers are still confirming safety and getting an early look at how well the treatment works. Trials at this stage are designed to produce evidence regulators and physicians can act on — not just observations to follow up later.
What the results showed
47% tumor response rate — and responses lasted nearly 2 years.
Blood Neoplasia · 2024 · NCT03439280
These findings — that rate at 600 mg mezagitamab in heavily pretreated relapsed multiple myeloma — were published in the Blood Neoplasia and represent the headline result of the study.
Researchers tracked outcomes across 50 patients enrolled in the trial. The result was consistent enough across the group that the team felt confident reporting it.
What this means for patients
For patients with multiple myeloma, this result changes the calculus on what to ask their care team about. Whether it changes day-to-day care depends on factors like disease subtype, prior treatments, and where the patient is in their care journey.
What you can do now
Mezagitamab is still in development and not yet FDA-approved for multiple myeloma. Daratumumab (Darzalex) and isatuximab (Sarclisa) — two other anti-CD38 antibodies — are FDA-approved and available now for myeloma. The drug company has decided not to pursue further myeloma development. Ask a hematologist about approved CD38 options.
Eligibility for the treatments mentioned above depends on specific test results and clinical history. Bring this summary, the trial name, and your most recent labs or pathology report to your next visit.
Open multiple myeloma trials
Olanzapine 2.5 vs 5 mg in Quadruplet Nausea/Vomiting Prophylaxis Before High-Dose Melphalan
Patients who receive a chemotherapy called melphalan are at high risk of having nausea and vomiting. A medication called olanzapine has been shown to decrease nausea and vomiting after chemotherapy. A previous research study found the 10 mg dose of olanzapine (combined with 3 standard medications used routinely to prevent nausea/vomiting) to be effective for patients who received melphalan chemotherapy, but several other studies have shown many patients have a side effect of sleepiness (e.g., sedation) with that dose of the medication. Our study will compare two lower doses of olanzapine (5 mg and 2.5 mg) in combination with the 3 standard medications used to prevent nausea/vomiting in the patients who receive melphalan chemotherapy to determine which dose is effective in preventing nausea and vomiting with the lowest amount of sleepiness side effect.
Study of Iberdomide, Bortezomib, Dexamethasone With Isatuximab Added on Demand for ND-NTE MM Patients
This study will evaluate efficacy and tolerability of iberdomide, bortezomib, dexamethasone and isatuximab on demand administered in combination for newly diagnosed transplant-ineligible multiple myeloma patients.