Nab-Paclitaxel PIPAC in Combination With Paclitaxel and Ramucirumab for the Treatment of Stomach Cancer With Peritoneal Metastases

Description

PRIMARY OBJECTIVES:

I. To determine the maximum tolerated dose (MTD) and recommended phase 2 dose (RP2D) of nab-paclitaxel PIPAC when given in combination with standard-of-care second-line systemic therapy (paclitaxel, ramucirumab).

II. To assess the safety and tolerability of nab-paclitaxel PIPAC plus systemic paclitaxel and ramucirumab, and accompanying dose modification plan, by evaluation of toxicities including: type, frequency, severity, attribution, time course and duration.

SECONDARY OBJECTIVES:

I. To evaluate the anti-tumor activity of nab-paclitaxel when given in combination with standard-of-care second-line systemic therapy (paclitaxel, ramucirumab), as assessed by:

Ia. Response Evaluation Criteria in Solid Tumors (RECIST), if available, version 1.1 via computed tomography (CT) scan at baseline and every 8 weeks until disease progression; Ib. Peritoneal Regression Grading Score (PRGS) via biopsy at each PIPAC cycle (both pre-PIPAC and post-PIPAC peritoneal samples will be obtained); Ic. Peritoneal Carcinomatosis Index (PCI) at the time of laparoscopy; and Id. Overall survival (OS) and progression-free survival (PFS) estimates at 6-months, 1-year and 2-years.

II. To estimate the PIPAC technical failure rate. III. To characterize and evaluate peritoneal tumor associated complications. IV. To characterize and evaluate post-operative surgical complications by Clavien-Dindo classification evaluated at 30 days after each PIPAC technical failure rate.

V. To evaluate patient-reported health state/quality of life and symptoms before treatment and at 6, 12, 18, and 24 weeks/off study, as measured by the European Quality of Life Five Dimension Five Level Scale (EQ-5D-5L) and MD Anderson Symptom Inventory (MDASI).

EXPLORATORY OBJECTIVES:

I. Characterize the peritoneal tumor and immune tumor microenvironment changes in response to therapy.

II. Evaluate the pharmacokinetics of nab-paclitaxel PIPAC. III. Evaluate patients’ quality of life during nab-paclitaxel PIPAC plus systemic therapy.

OUTLINE: This is a dose-escalation study of nab-paclitaxel PIPAC in combination with paclitaxel and ramucirumab followed by a dose-expansion study.

Patients receive nab-paclitaxel PIPAC intraperitoneally (IP) over 40 minutes on day 1 and standard of care (SOC) paclitaxel intravenously (IV) over 60 minutes on days 15, 22, 29, 43, and 50 and ramucirumab IV over 30-60 minutes on days 15, 29 and 43 of each cycle. Cycles repeat every 8 weeks (56 days) for up to 3 cycles in the absence of disease progression or unacceptable toxicity. Patients may then continue SOC paclitaxel IV on days 1, 8, and 15 and ramucirumab IV on days 1 and 15 of each cycle per physician as deemed appropriate. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo blood sample collection, tumor biopsy, and CT or magnetic resonance imaging (MRI) throughout the study.

After completion of study treatment, patients are followed up at 4 weeks, then every 3 months for year 1 followed by every 6 months until progression or initiation of a new systemic anti-cancer therapy or death, whichever occurs first.