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Anti-CEACAM5 ADC Precemtabart Tocentecan (M9140) in Chinese Participants With Solid Tumors

A Phase 1, Open-label Study of Anti-CEACAM5 Antibody-Drug Conjugate Precemtabart Tocentecan (M9140) in Chinese Participants With Solid Tumors (PROCEADE-CRC-02)

Status
Active, not recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06806046
Enrollment
12
Registered
2025-02-03
Start date
2024-12-20
Completion date
2026-09-30
Last updated
2026-05-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Colorectal Cancer, Solid Tumors

Keywords

ADC, Anti-CEACAM5, colorectal cancer, solid tumors

Brief summary

The purpose of this study is to evaluate the safety and early clinical activity of M9140 in Chinese participants with locally advanced or metastatic colorectal cancer (CRC).

Interventions

DRUGM9140

M9140 will be administered every 3 weeks until progression, unacceptable toxicity, withdrawal of consent, or any criterion for withdrawal from the study. There will be 2 dose levels, if the low dose level is tolerated, then M9140 will be escalated to the high dose level.

Sponsors

Merck Healthcare KGaA, Darmstadt, Germany, an affiliate of Merck KGaA, Darmstadt, Germany
Lead SponsorINDUSTRY
Merck KGaA, Darmstadt, Germany
CollaboratorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Participants with documented histopathological diagnosis of locally advanced or metastatic CRC, who were intolerant/refractory to or progressed after standard systemic therapies for the advanced/metastatic stage that included and are restricted to a fluoropyrimidine, irinotecan, a platinum agent (e.g. oxaliplatin), an anti-EGFR agent (if clinically indicated, i.e. RAS/BRAF wt), and an anti-VEGF agent. Participants may have received previous treatment with trifluridine/tipiracil and/or regorafenib or fruquintinib, if locally indicated and available. Participants with a known MSI-H status must have received treatment with an immune checkpoint inhibitor (if locally indicated and available) unless contraindicated * 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 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, with concurrence with the Sponsor's Medical Monitor, is considered cured with minimal risk of recurrence within 3 years) * Participants with known brain metastases, except those meeting the following criteria: Brain metastases that have been treated locally and are clinically stable for at least 4 weeks prior to the start of treatment; No ongoing neurological symptoms that are related to the brain localization of the disease (sequelae that are a consequence of the treatment of the brain metastases are acceptable) * Participants with diarrhea (liquid stool) or ileus Grade \> 1 * Cerebrovascular accident/stroke (\< 6 months prior to enrollment) * Other protocol defined

Design outcomes

Primary

MeasureTime frame
Number of Participants With Dose Limiting Toxicities (DLTs)Up to 21 days (Each cycle is of 21 days)
Number of Participants with Treatment-Emergent Adverse Events (TEAEs)Up to 8 months

Secondary

MeasureTime frame
Pharmacokinetic (PK) Plasma Concentrations of M9140Cycle 1 Day 1 (C1D1) - Predose, 6, 24, 168, 336 hr (hour) post dose: predose C2D1; C3D1 - Predose, 6, 24, 336 hr postdose; C4D1 - predose every 2 cycles until treatment discontinuation (20 months). [Each cycle is of 21 days]
Objective Response (OR) According to Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST v1.1) as Assessed by InvestigatorsTime from first study treatment throughout the study duration until progressive disease or death up to approximately 8 months
Duration of Response (DoR) According to RECIST v1.1 as Assessed by InvestigatorTime from first study treatment throughout the study duration until progressive disease or death up to approximately 8 months
Progression-free Survival (PFS) According to RECIST v1.1Time from first study treatment throughout the study duration until progressive disease or death up to approximately 8 months

Countries

China

Contacts

STUDY_DIRECTORMedical Responsible

Merck Healthcare KGaA, Darmstadt, Germany, an affiliate of Merck KGaA, Darmstadt, Germany

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 23, 2026