M3554 treatment for advanced solid tumors

A Phase 1, Two-Part, Multicenter, Open-Label First in Human Study of Anti-GD2 Antibody Drug Conjugate M3554 in Participants With Advanced Solid Tumors

PHASE1 · EMD Serono · NCT06641908

This study is testing a new treatment called M3554 to see if it can help people with advanced solid tumors, like certain types of sarcomas and glioblastomas, who haven't had success with other treatments.

Quick facts

PhasePHASE1
Study typeInterventional
Enrollment52 (estimated)
Ages18 Years and up
SexAll
SponsorEMD Serono (industry)
Locations11 sites (Boston, Massachusetts and 10 other locations)
Trial IDNCT06641908 on ClinicalTrials.gov

What this trial studies

This study evaluates the safety and effectiveness of M3554, an anti-GD2 antibody-drug conjugate, in patients with advanced solid tumors, specifically soft tissue sarcomas and glioblastoma that is IDH-wildtype. The trial aims to determine the recommended doses of M3554 and assess its preliminary antitumor activity in participants who have not responded to previous treatments. Participants will be monitored over approximately four months to gather data on the drug's effects and safety profile.

Who should consider this trial

Good fit: Ideal candidates include individuals with advanced soft tissue sarcomas or glioblastoma who have progressed after at least one prior line of systemic therapy.

Not a fit: Patients with early-stage tumors or those who have not received prior systemic therapy may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could provide a new targeted therapy option for patients with advanced solid tumors.

How similar studies have performed: Other studies using targeted therapies for similar conditions have shown promise, indicating potential for success with this approach.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Escalation A: participants with documented histopathological diagnosis of locally advanced or metastatic STS with unresectable disease that has progressed after at least one prior line of anthracycline-containing systemic therapy for the locally advanced/metastatic setting.
* Participants with resectable locally advanced or metastatic disease, who had surgery before study entry will be allowed in the trial if there is residual disease after surgery and if the surgery was performed at least 4 weeks before first dose of study intervention.
* Escalation B: participants with documented histopathological diagnosis of glioblastoma, IDH-wildtype, who have progressed after ONLY one prior line of therapy (including radiotherapy +/- temozolomide, depending on the O\^6-methylguanine-DNA methyltransferase \[MGMT\] status) and relapsing at least 3 months after the end of the radiotherapy treatment.
* Eastern Cooperative Oncology Group Performance Status (ECOG PS) below or equal to 1
* Participants with adequate hematologic, hepatic and renal function as defined in protocol
* Other protocol defined inclusion criteria could apply

  * Exclusion Criteria:
* Participant has a history of malignancy other than STS or glioblastoma (depending on the escalation/expansion cohort) within 3 years before the date of enrollment (exceptions are squamous and basal cell carcinomas of the skin and carcinoma in situ of the cervix, benign prostate neoplasm/hypertropia, or malignancy that in the opinion of the Investigator, is considered cured with minimal risk of recurrence within 3 years).
* STS only: Participants with history of brain metastasis, leptomeningeal metastasis, or participants with spinal cord compression
* Other protocol defined exclusion criteria could apply

Where this trial is running

Boston, Massachusetts and 10 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Advanced Solid Tumor, Glioblastoma, IDH-wildtype, Soft tissue sarcomas, GD2 prevalence, targeted therapy, TOP1 inhibitor, exatecan

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.