MRD-Guided BCMA/CD3 Bispecific Antibody Treatment After Stem Cell Transplant for Newly Diagnosed Multiple Myeloma (CAREMM-007)

Institute of Hematology & Blood Diseases Hospital, China

Status and phase: Not yet enrolling; Phase 2

Conditions: Multiple Myeloma

Treatments: Drug: anti-BCMA/CD3 bispecific antibody

Study type: Interventional

Funder types: Other

Identifiers

NCT07409454

IIT2025139

Details and patient eligibility

About

This is a prospective, single-arm clinical study designed to evaluate the efficacy and safety of the BCMA/CD3 bispecific antibody (CM336) as maintenance therapy after autologous hematopoietic stem cell transplantation in patients with newly diagnosed multiple myeloma.

Enrollment: 20 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. Be able to understand and voluntarily signs the informed consent form (ICF).
2. Age ≥ 18 years.
3. Newly diagnosed multiple myeloma according to the International Myeloma Working Group (IMWG) criteria.
4. MRD positivity (≥10-⁵) detected by EuroFlow.
5. Previous therapy limited to first-line treatment only, including: (1) Induction therapy with a 3- or 4-drug regimen containing a proteasome inhibitor and/or an immunomodulatory drug and/or an anti-CD38 monoclonal antibody; (2) Single or tandem autologous stem cell transplantation (ASCT); (3) Up to 2-4 cycles of consolidation therapy post-ASCT are permitted, with the total number of induction plus consolidation cycles not exceeding 8.
6. Completion of ASCT within ≤12 months from the start of induction therapy; and ≤6 months from the most recent ASCT at enrollment (≤7 months if consolidation therapy was administered).
7. No prior maintenance therapy.
8. Achieved at least a partial response (≥PR) according to the IMWG 2016 response criteria.
9. Presence of measurable disease at diagnosis.

Exclusion criteria

1. Prior treatment with genetically modified adoptive cellular therapy.
2. History of allogeneic stem cell transplantation or solid organ transplantation.
3. Disease progression prior to enrollment (per IMWG 2016 response criteria), or presence of plasma cell leukemia, Waldenström macroglobulinemia, POEMS syndrome, or light-chain amyloidosis not attributable to symptomatic multiple myeloma.
4. Central nervous system involvement.

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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20 participants in 1 patient group

BsAbs-treatment group

Experimental group

Treatment:

Drug: anti-BCMA/CD3 bispecific antibody