This study is designed to assess the efficacy and safety of ifinatamab deruxtecan (I-DXD) in the following tumor types: endometrial cancer (EC); head and neck squamous cell carcinoma (HNSCC); pancreatic ductal adenocarcinoma (PDAC); colorectal cancer (CRC); hepatocellular carcinoma (HCC); adenocarcinoma of esophagus, gastroesophageal junction, and stomach (Ad-Eso/GEJ/gastric); urothelial carcinoma (UC); ovarian cancer (OVC); cervical cancer (CC); biliary tract cancer (BTC); human epidermal growth factor 2 (HER2)-low breast cancer (BC); HER2 immunohistochemistry (IHC) 0 BC; cutaneous melanoma; and neuroendocrine carcinoma (NEC).
Participants must consent to provide a pretreatment tumor sample which has not been previously irradiated. Fresh biopsies are strongly preferred, however, if a fresh pretreatment biopsy is not feasible or the procedure is unsuccessful, an appropriate archival sample must be provided. The most recent archival sample obtained up to 5 years prior to consent is acceptable.
Participants ages ≥18 years (follow local regulatory requirements if the legal age of consent for study participation is >18 years).
At least 1 measurable lesion on computed tomography (CT) or magnetic resonance imaging (MRI) according to Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST v1.1), as assessed by the investigator.
Documentation of radiological disease progression on or after the previous standard-of-care regimen. For NEC participants for which the standard therapy does not exist OR for which the standard therapy is not appropriate by the investigator: presence of advanced/metastatic disease without previous regimen is acceptable.
Prior treatment with orlotamab, enoblituzumab, or other B7-homologue 3 (B7-H3)-targeted agents, including I-DXd.
Prior discontinuation of an antibody drug conjugate (ADC) that consists of an exatecan derivative (e.g., T-DXd) due to treatment-related toxicities.
Clinically active brain metastases, spinal cord compression, or leptomeningeal carcinomatosis, defined as untreated or symptomatic, or requiring therapy with steroids or anticonvulsants to control associated symptoms.
Inadequate treatment washout period before enrollment as specified in the protocol.
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Treatment groupsSee each treatment group below.
Daiichi Sankyo
Lead sponsor
Merck Sharp & Dohme LLC
Collaborator