Researchers want to learn if patritumab deruxtecan (MK-1022) can treat certain gastrointestinal (GI) cancers. The GI cancers being studied are advanced (the cancer has spread to other parts of the body). The goals of this study are to learn:
* About the safety and how well people tolerate of patritumab deruxtecan * How many people have the cancer respond (get smaller or go away) to treatment
Unresectable or metastatic colorectal cancer.
Advanced and/or unresectable biliary tract cancer (BTC)
Hepatocellular carcinoma (HCC) not amenable to locoregional therapy
Locally advanced unresectable or metastatic gastroesophageal cancer
Has a history of (noninfectious) interstitial lung disease (ILD) or pneumonitis that required steroids, or has current ILD or pneumonitis, and/or suspected ILD or pneumonitis that cannot be ruled out by standard diagnostic assessments at Screening
Has clinically severe respiratory compromise (based on the investigator's assessment) resulting from intercurrent pulmonary illnesses
Has evidence of any leptomeningeal disease
Has clinically significant corneal disease
Single group
Patritumab deruxtecan
Biological/VaccineAdministered via intravenous (IV) infusion
Number of Participants Experiencing Dose-Limiting Toxicity (DLT) (Dose-Escalation Phase)
DLT will be defined as any drug-related adverse event observed during the DLT evaluation period that results in a change to a given dose or a delay in initiating the next 21-day cycle. The number of participants in the dose-escalation phase who experience a DLT will be presented.
Number of Participants with One or More Adverse Events (AEs)
An AE is defined as any unfavorable and unintended sign, symptom, disease, or worsening of preexisting condition temporally associated with study treatment and irrespective of causality to study treatment. The number of participants who experience an AE will be presented.
Number of Participants who Discontinue Study Intervention Due to an AE
An AE is defined as any unfavorable and unintended sign, symptom, disease, or worsening of preexisting condition temporally associated with study treatment and irrespective of causality to study treatment. The number of participants who discontinue study treatment due to an AE will be presented.
Objective Response Rate (ORR)
ORR is defined as the percentage of participants with Complete Response (CR: disappearance of all target lesions) or Partial Response (PR: at least a 30% decrease in the sum of diameters of target lesions) per Response Evaluation Criteria in Solid Tumors (RECIST) 1.1. The percentage of participants who experience CR or PR as assessed by Blinded Independent Central Review (BICR) will be presented.
Duration of Response (DOR)
For participants who demonstrate a confirmed Complete Response (CR: disappearance of all target lesions) or Partial Response (PR: at least a 30% decrease in the sum of diameters of target lesions) per RECIST 1.1, DOR is defined as the time from first documented evidence of CR or PR until progressive disease (PD) or death. Per RECIST 1.1, PD is defined as at least a 20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm. The appearance of one or more new lesions is also considered PD. DOR as assessed by BICR will be presented.
Progression Free Survival (PFS)
PFS is defined as the time from first day of study intervention to the first documented progressive disease (PD) or death due to any cause, whichever occurs first as assessed by BICR. Per RECIST 1.1, PD is defined as ≥20% increase in the sum of diameters of target lesions. In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of ≥5 mm. The appearance of one or more new lesions is also considered PD. The appearance of one or more new lesions is also considered PD. PFS as assessed by BICR will be presented.
Overall Survival (OS)
OS is the length of time from when the participant starts treatment until death from any cause.
Maximum Plasma Concentration (Cmax) of Patritumab Deruxtecan
Blood samples collected at protocol specific time points will be used to determine the Cmax of patritumab deruxtecan.
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Merck Sharp & Dohme LLC
Lead sponsor
Daiichi Sankyo
Collaborator
