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M9140 is an ADC (antibody-drug conjugate) that is designed to deliver a cytotoxic topoisomerase 1 (TOP1) inhibitor payload to CEACAM5-expressing tumor cells. CEACAM5 is a a cell surface protein with limited expression in adult healthy tissues but with high expression in various adenocarcinomas, particularly in colorectal cancer: it is found I over 90% of the CRC cancers.

Results reported at ASCO 2024: Best objective response was partial response (PR) in 4 patients; stable disease (SD) in 17 , including 6 lasting for ≥100 days and progressive disease (PD) in 6 patients.  

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纳入标准

* Participants with documented histopathological diagnosis of locally advanced or metastatic colorectal cancer (CRC), who were intolerant/refractory to or progressed after standard systemic therapies for the advanced/metastatic stage, if locally indicated and available to the participant. Participants with a known microsatellite instability high (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

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排除标准：

* 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
* Participants with active chronic inflammatory bowel disease (e.g., ulcerative colitis, Crohn's disease, intestinal perforation) and/or bowel obstruction
* Unstable angina, myocardial infarction, congestive heart failure (New York Heart Association [NYHA] >= II) or a coronary revascularization procedure within 180 days of study entry. Calculated QTc average (using the Fridericia correction calculation) of > 470 milliseconds (ms)
* Cerebrovascular accident/stroke (< 6 months prior to enrollment)
* Other protocol defined exclusion criteria could apply