The PLATINUM Trial: Optimizing Chemotherapy for the Second-Line Treatment of Metastatic BRCA1/2 or PALB2-Associated Metastatic Pancreatic Cancer

PRIMARY OBJECTIVES: I. To evaluate and compare overall response rate (ORR) in patients with BRCA1/2 or PALB2 mutant pancreas cancer whose disease has progressed on front-line fluorouracil, irinotecan, leucovorin and oxaliplatin (FOLFIRINOX) treated with nab-paclitaxel, gemcitabine, and cisplatin (NABPLAGEM) = nab-paclitaxel, gemcitabine, and cisplatin (arm 1) versus nab-paclitaxel and gemcitabine (arm 2). (Phase II) II. To evaluate and compare overall survival (OS) time in patients with BRCA1/2 or PALB2 mutant whose disease has progressed on front-line FOLFIRINOX treated with 1) NABPLAGEM = nab-paclitaxel, gemcitabine, and cisplatin (arm 1) versus nab-paclitaxel and gemcitabine (arm 2). (Phase III) SECONDARY OBJECTIVES: I. To evaluate and compare progression-free survival (PFS) per Response Evaluation Criteria in Solid Tumors 1.1 (RECIST 1.1) criteria between 2 treatment arms. II. To evaluate and compare duration of response (DoR) between 2 treatment arms. III. To evaluate and compare CA19-9 response (defined as patients with a baseline CA19-9 \>= 2x upper limit of normal (ULN) who demonstrate a minimum 25% decrease in CA19-9 at any time point) between 2 treatment arms. IV. To evaluate and compare toxicity profile as assessed by treating clinicians between 2 treatment arms. OUTLINE: Patients are randomized to 1 of 2 arms. ARM I: Patients receive nab-paclitaxel intravenously (IV) over 30-40 minutes, gemcitabine IV over 30-40 minutes, and cisplatin IV over 30-60 minutes on days 1 and 15 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Patients also undergo magnetic resonance imaging (MRI) or computed tomography (CT) throughout the trial. Patients may optionally undergo blood sample collection at baseline and on study. ARM II: Patients receive nab-paclitaxel IV over 30-40 minutes and gemcitabine IV over 30-40 minutes on days 1 and 15 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Patients also undergo MRI or CT throughout the trial. Patients may optionally undergo blood sample collection at baseline and on study. After completion of study treatment, patients are followed up within 30 days and then every 3 months for 2 years or until death, whichever comes first.