Cell therapy targets a marker on myeloma cells
NCT ID NCT04649073
First seen Sep 14, 2026 · Last updated Sep 15, 2026 · Updated 1 time
Summary
Researchers are testing a cell therapy called OPC-415 in adults with multiple myeloma that has come back or stopped responding to standard treatments. Participants must have the MMG49 antigen on their cancer cells and have already tried at least two prior regimens. The trial measures safety and side effects in its first stage, then tracks how many patients see their cancer shrink in the second stage.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- OPC-415, an experimental cell therapy that targets the MMG49 antigen on myeloma cells
- What this could lead to
- If it works, this could offer a new treatment option for people whose multiple myeloma has returned after several prior therapies.
- What could go wrong
- This is a very small, early-stage trial with no control group, so safety and benefit are still unproven. Cell therapies can cause serious immune reactions, and the results may not apply to a wider group of patients.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 1/2
Runs two stages together: safety and dose first, then whether the treatment works.
- Participants
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11 people
The number who actually took part.
- Started
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Feb 2021
- Finished
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Apr 2025
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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20 to 80 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Patients aged between 20 and 80 (75 for the phase 1 part) years, both inclusive, at the time of consent * Patients with a definitive diagnosis of active multiple myeloma * Patients who have had 2 or more prior regimens (including all proteasome inhibitors, immunomodulators, and anti-CD38 antibody) * Patients with relapsed and/or refractory Multiple Myeloma * Patients who are positive for MMG49 antigen * Patients with an Eastern Cooperative Oncology Group (ECOG) performance status (PS) score of 0 or 1. Those with an ECOG-PS score of 2 due solely to MM bone lesions can be enrolled * Patients who are expected to survive for at least 3 months Exclusion Criteria: * Patients who are scheduled to receive high-dose chemotherapy in combination with autologous stem cell transplantation as the next treatment. * Patients who have other active double/multiple cancers * Patients on continuous and systemic (oral or intravenous) medication with corticosteroids or other immunosuppressive agents * Patients with graft-versus-host disease that requires treatment. * Patients who underwent a highly invasive and extensive surgical procedure within 2 weeks. * Patients who previously underwent allogeneic stem cell transplantation or organ transplantation. * Patients who underwent autologous stem cell transplantation within 90 days. * Patients with systemic amyloidosis (except localized amyloidosis without organ derangement) or plasma cell leukemia. * Patients with prior or current central nerve involvement in MM. * Patients whose best ever response to MM treatment is PD. * Patients who previously received gene therapy or cell therapy (except hematopoietic stem cell transplantation). * Pregnant women, nursing mothers, or women with a positive pregnancy test.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Japanese Red Cross Medical Center
Shibuya-ku, Japan
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Nagoya City University Hospital
Nagoya, Japan
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National Hospital Organization Okayama Medical Center
Okayama, Japan
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Osaka University Hospital
Suita-shi, Japan
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Sapporo Medical University Hospital
Sapporo, Japan
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Tohoku University Hospital
Sendai, Japan
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Tokai University Hospital
Isehara-shi, Japan
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Yamagata University Hospital
Yamagata, Japan
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Triple-Drug combo aims to deepen myeloma response before transplant
- Oral drug combo targets myeloma that escaped the bone marrow
- Can a Four-Drug combo tame Ultra-High-Risk myeloma?
- MRI scans may reveal hidden clues to myeloma relapse risk
- Can a dual immunotherapy erase hidden myeloma cells?
- Does CAR-T therapy affect the brain? a study investigates