This phase I/II trial tests the safety, side effects, best dose and how well giving selumetinib with DS-8201a works for the treatment of pancreatic ductal adenocarcinoma that may have spread from where it first started to nearby tissue, lymph nodes, or distant parts of the body (advanced), that cannot be removed by surgery (unresectable) or that has spread from where it first started (primary site) to other places in the body (metastatic). Selumetinib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. DS-8201a is in a class of medications called antibody-drug conjugates. It is composed of a monoclonal antibody, called trastuzumab, linked to a chemotherapy drug, called deruxtecan. Trastuzumab attaches to HER2 positive cancer cells in a targeted way and delivers deruxtecan to kill them. Giving selumetinib with DS-8201a may be safe, tolerable and/or effective in treating patients with advanced, unresectable or metastatic pancreatic ductal adenocarcinoma.
Review of eligibility criteria by the study principal investigator (PI) is required prior to enrollment
Patients must have histologically or cytologically confirmed adenocarcinoma of the pancreas
Patients must have unresectable or metastatic disease with KRAS mutation per Next Generation Sequencing (NGS) tumor testing and HER2 immunohistochemistry (IHC) positivity (2+ or above for dose escalation and per decision rule for phase II), as determined by a Clinical Laboratory Improvement Act (CLIA)-certified kit using gastric cancer criteria
Patients must have measurable disease that can fulfill Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 criteria
Patients with prior MEK inhibitor, ERK inhibitor, or HER2-directed therapy treatment
Patients who have had chemotherapy (including antibody drug therapy, retinoid therapy, hormonal therapy for cancer) within 3 weeks (2 weeks or five half-lives, whichever is longer for small-molecule targeted agents such as 5-fluorouracil-based agents, folinate agents), weekly paclitaxel; 6 weeks for nitrosoureas or mitomycin C
Patients who have had immunotherapy including monoclonal antibody therapy within 4 weeks
Patients who have a history of severe hypersensitivity reactions to other monoclonal antibodies
National Cancer Institute (NCI)
Lead sponsor