The investigators propose to evaluate the safety of drug combinations in patients with advanced gastroesophageal cancer and other gastrointestinal (GI) malignancies. Finding effective novel therapies for patients with advanced gastric cancer and other GI malignancies is an area of great unmet need. The investigators believe that modulating the tumor microenvironment with biologic agents like cabozantinib will have synergistic effect when combined with checkpoint-based immunotherapeutics like durvalumab in this patient population. This is a phase I/II, open label, multi-cohort trial looking at safety, tolerability and efficacy endpoints.
Age ≥ 18 years
Eastern Cooperative Oncology Group (ECOG) Performance Status 0-1
Esophageal adenocarcinoma
Colorectal adenocarcinoma (CRC)
Prior treatment with a Programmed cell death protein 1 (PD1) or (PD-L1) inhibitor, including durvalumab, or anti PD-L2 (HCC and gastric / esophageal cancer patients with prior exposure to these agents are eligible).
Prior treatment with cabozantinib or other Receptor for hepatocyte growth factor (MET) or Dual MET/ Hepatocyte growth factor (HGF) monoclonal antibodies or MET/HGF tyrosine kinase inhibitors (TKIs), including crizotinib, foretinib, tivantinib, rilotumumab, and onartuzumab.
Abdominal fistula, GI perforation, bowel obstruction, or intra-abdominal abscess within 6 months before first dose.
Evidence of active peptic ulcer disease, inflammatory bowel disease (eg, Crohn's disease), diverticulitis, cholecystitis, symptomatic cholangitis or appendicitis, acute pancreatitis, acute obstruction of the pancreatic duct or common bile duct, or gastric outlet obstruction.
Single group
Cabozantinib
Drugby mouth
Durvalumab
Druginfusion
Tremelimumab
Druginfusion
Phase I- Maximum Tolerated Dose (MTD)
Defined as the highest dose studied for which the observed incidence of dose limiting toxicities (DLT) is less than 33%. Determined per Common Terminology Criteria for Adverse Events (CTCAE) version 5.0.
Phase II- Overall Response Rate (ORR)
Defined as the proportion of participants best response to treatment. Per RECIST v1.1: Complete Response (CR): Disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 mm. Partial Response (PR): At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.
Proportion of participants with adverse events (AEs).
Determined per Common Terminology Criteria for Adverse Events (CTCAE) version 5.0.
Overall Benefit Rate (OBR)
Defined as the proportion of patients with overall benefit to therapy. Overall benefit is defined as the best response recorded, (including complete Response (CR), Partial Response (PR), and Stable Disease (SD)), from the start of the treatment until the end of treatment. Determined per Modified Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1. Complete Response (CR): Disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to \<10 mm. Partial Response (PR): At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters. Stable Disease (SD): Neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for PD, taking as reference the smallest sum diameterswhileonstudy.
Progression Free Survival (PFS)
Defined as the time from the start of treatment until the first documentation of disease progression or death due to any cause, whichever occurs first. Determined per Modified Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1. Progressive Disease (PD): At least a 20% increase in the sum of diameters of target lesions, taking as reference the smallest sum on study (this includes the baseline sum if that is the smallest on study). In addition to the relative increase of 20%, the sum must also demonstrate an absolute increase of at least 5 mm. (Note: the appearance of one or more new lesions is also considered progression).
Overall Survival (OS)
Defined as the time from the start of treatment until death due to any cause. Determined per Modified Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1.
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Anwaar Saeed
Lead sponsor
University of Pittsburgh
Sponsor institution
AstraZeneca
Collaborator
Exelixis
Collaborator
