A Phase 1b/2, Dose-escalation, Randomized, Multicenter Study of Maintenance Ivaltinostat Plus Capecitabine or Capecitabine in Patients with Metastatic Pancreatic Adenocarcinoma Whose Disease Has Not Progressed on FOLFIRINOX
This study is a Phase 1b/2, dose-escalation, randomized, multicenter study to assess the efficacy, safety, tolerability, and PK of ivaltinostat in combination with capecitabine and capecitabine monotherapy in patients with metastatic pancreatic adenocarcinoma whose disease has not progressed on a first line fluoropyrimidine-based chemotherapy (e.g., FOLFIRINOX). In Phase 1b, 3 dose levels of ivaltinostat will be studied in combination with a fixed dose of capecitabine to determine the RP2D of ivaltinostat. In Phase 2, patients will be randomized in a 1:1 ratio to the combination of ivaltinostat and capecitabine or to capecitabine monotherapy. A fixed dose for capecitabine 1000 mg/m2 orally twice daily will be taken on Days 1 to 14, and the RP2D of ivaltinostat will be administered intravenously once a week for 2 weeks, followed by 1 week of rest. One cycle consists of 21 days. Tumor response during study treatment will be assessed every 6 weeks up to Cycle 10, then every 9 weeks afterwards using RECIST v1.1 criteria.
• Age: ≥18 years
• For Phase 1b, histologically or cytologically confirmed pancreatic adenocarcinoma (locally advanced or metastatic) with at least 1 prior therapy in either the advanced or perioperative setting
• For Phase 1b, measurable disease and/or non-measurable disease per RECIST v1.1
• For Phase 2, histologically or cytologically confirmed pancreatic adenocarcinoma without evidence of disease progression while receiving initial chemotherapy for metastatic disease (e.g., must have had a demonstrated CR, PR, or SD following initial chemotherapy).
• For Phase 2, measurable disease and/or non-measurable or no evidence of disease assessed by baseline CT (or MRI where CT is contraindicated). RECIST v1.1 will be used to allow for assessment of disease progression due to new lesions in patients with no evidence of disease at baseline. Patients with no evidence of disease following FOLFIRINOX chemotherapy will be deemed to have radiographic disease progression if new lesions are detected.
• For Phase 2, treatment with FOLFIRINOX for metastatic pancreatic adenocarcinoma at full or modified doses, for a minimum of 16 weeks, and no evidence of progression based on the radiographic imaging.
• a. Randomization must occur within 6 weeks of the last dose of chemotherapy.
• b. Patients who have received at least 16 weeks of FOLFIRINOX combination regimen but had non-fluoropyrimidine chemotherapeutic agents discontinued prior to 16 weeks due to toxicity are eligible if they have no radiographic evidence of disease.
• For Phase 2, patients who received prior chemotherapy or prior chemoradiation for a prior cancer or as adjuvant/neoadjuvant treatment for pancreatic adenocarcinoma are eligible provided at least 12 months have elapsed between the last dose of treatment and initiation of the FOLFIRINOX chemotherapy for metastatic pancreatic adenocarcinoma.
• Prior radiation therapy is allowed, provided \>14 days have elapsed since completion of radiation prior to randomization.
• Adequate organ function
• ECOG Performance Status 0-1 at the date of signing the informed consent.