Gemcitabine (Gem) and nab-paclitaxel (nab-P) in patients (pts) with refractory advanced pancreatic cancer.

Abstract

413 Background: The combination of nab-P and Gem improves survival compared to Gem alone in first-line therapy of metastatic pancreatic cancer. Efficacy data with this doublet in previously treated pts are scant. Our group presented preliminary results on 10 pts treated with this two-drug combination in the second and third line setting and herein present updated data on 59 pts. Methods: This IRB approved analysis identified all pts diagnosed with advanced refractory pancreatic cancer, treated with second-line Gem and nab-P at University of Miami and Sylvester Comprehensive Cancer Center between September 2010 and June 2014. Response by RECIST, CA19-9, and symptomatic improvement were assessed. Progression-free survival (PFS) and overall survival (OS) were calculated from the start of Gem + nab-P and were analyzed using the Kaplan-Meier method. Clinical benefit was defined as the percentage of patients with a partial response (PR) or stable disease (SD). Results: Data from59 pts were analyzed. The median age was 60; 55% were male; 54% received Gem + nab-P as second line therapy and 46% received it as third-line or beyond. Five (10%) pts had confirmed PR, 23 (47%) SD and 21 (43%) progressed. Among the 31 (52%) pts who received prior Gem, 18 (58%) had clinical benefit, 3 PR and 15 SD. The median OS was 3.9 months. The median PFS was 3 months. Toxicity appears similar to what has been reported on the MPACT trial with the combination. Conclusions: The clinical benefit seen withGem and nab-P in this group of pretreated pancreatic cancer pts suggests that it can be considered as an option. Additionally, prior Gem treatment appears not to decrease Gem and nab-P benefit in this population. Since nab-P monotherapy has modest activity in pre-treated pancreatic cancer pts, our data suggests a positive interaction between Gem and nab-P that may overcome resistance to Gem. [Table: see text]