The primary objective of this study is to determine the efficacy of nab-paclitaxel plus cisplatin plus gemcitabine for patients with metastatic pancreatic ductal adenocarcinoma (PDA).

This is a phase 1b/2 open-label pilot study evaluating the preliminary efficacy and safety of nab-paclitaxel, cisplatin, and gemcitabine in patients with metastatic pancreatic ductal adenocarcinoma.

An individual cycle of therapy will be defined as Days 1 and 8 every 21 days. Multiple cycles may be administered until the patient is withdrawn from therapy.

Overall response rates as well as individual categories of response (complete response-CR, partial response-PR, stable disease-SD and progressive disease-PD) will be determined using RECIST 1.1. Time-to-event endpoints, including progression free survival (PFS) and OS (overall survival) will be assessed using the Kaplan-Meier method. Evaluation of stable disease at 9 weeks will also be assessed. Toxicity (adverse events) will be recorded using the NCI CTCAE (v4.0, May 2009).

Inclusion Criteria:

• Age >18 years of age; male or female.
• Histologically or cytologically confirmed metastatic pancreatic ductal adenocarcinoma.
• Capable of providing informed consent and complying with trial procedures.
• Karnofsky Performance Status (KPS) of >/=70%.
• Life expectancy >/=12 weeks.
• Measurable tumor lesions according to RECIST 1.1 criteria.
• Women must not be able to become pregnant (e.g. post-menopausal for at least 1 year, surgically sterile, or practicing adequate birth control methods) for the duration of the study. Women of child bearing potential must have a negative serum or urine pregnancy test at the Screening Visit and be non-lactating. Both male and female patients of reproductive potential must agree to use a reliable method of birth control during the study.

Exclusion Criteria:

• Patients must have received no previous radiotherapy, surgery, chemotherapy or investigational therapy for the treatment of metastatic disease. Prior treatments in the adjuvant setting with gemcitabine and/or 5-FU or gemcitabine administered as a radiation sensitizer are allowed, provided at least 6 months have elapsed since completion of the last dose and no lingering toxicities are present.
• Palliative surgery and/or radiation treatment less than 4 weeks prior to initiation of study treatment.
• Exposure to any investigational agent within 4 weeks prior to initiation of study treatment.
• Evidence of central nervous system (CNS) metastasis (negative imaging study, if clinically indicated, within 4 weeks of Screening Visit).
• History of other malignancies (except cured basal cell carcinoma, superficial bladder cancer or carcinoma in situ of the cervix) unless documented free of cancer for >/= 5 years.
• Laboratory values: Screening serum creatinine > upper limits of normal (ULN); total bilirubin > ULN: alanine aminotransferase (ALT) and AST >/= 2.5 ULN or >/= 5.0 x ULN if liver metastases are present; absolute neutrophil count < 1,500/mm3, platelet concentration < 100,00/mm3, hematocrit level < 27% for females or < 30% for males, or coagulation tests (prothrombin time [PT], partial thromboplastin time [PTT], International Normalized Ratio [INR]) > 1.5 x ULN unless on therapeutic doses of warfarin.
• current, serious, clinically significant cardiac arrhythmias as determined by the Investigator.
• History of HIV infection.
• Active, clinically significant serious infection requiring treatment with antibiotics, anti-virals or anti-fungals.
• Major surgery within 4 weeks prior to initiation of study treatment. Any condition that might interfere with the patient's participation in the study or in the evaluation of the study results.
• Any condition that is unstable and could jeopardize the patient's participation in the study.

Adverse event data were collected during the period starting with initial dose of study drug and ending at the time the patient went off study or 30 days after the patient's last dose of study drug, whichever was later.

The definitions of adverse event and serious adverse event for this study match the definitions from clinicaltrials.gov.