Phase II Trial of Nab-Paclitaxel and Gemcitabine for First-Line Treatment of Patients With Cholangiocarcinoma — PrE0204  

Clinical Trial Summary

Patients with advanced or metastatic cholangiocarcinoma (CCA) who are not eligible for curative surgery, transplantation, or ablative therapies will receive nab-paclitaxel and gemcitabine chemotherapy.

The purpose of this study is to evaluate the effectiveness and safety of the combination of nab-paclitaxel and gemcitabine. The effectiveness will be determined by improvement in the length of time during and after treatment, that the CCA does not get worse.

Advanced cholangiocarcinomas (CCAs) are aggressive tumors with median survival time after diagnosis of less than 12 months, and five-year overall survival (OS) of ~5% with systemic chemotherapy. Currently available systemic therapies for CCA are largely ineffective, thus the rationale for the proposed research is to investigate targeted delivery of chemotherapy.

The goal of this study is to evaluate the efficacy of gemcitabine plus nab-paclitaxel in patients with advanced CCA. This is based on the premise that nab-paclitaxel binds to SPARC (secreted protein acidic and rich in cysteine) through its interaction with albumin, leading to an increase in intra-tumoral concentration of gemcitabine through decreased deoxycytidine deaminase (CDA) enzyme. We hope to improve on the OS of patients with advanced CCA through the use of the synergistic combination of nab-paclitaxel and gemcitabine to specifically target the SPARC protein in the peri-tumoral stroma. We aim to provide critical data to further develop pharmacologic strategies to target the desmoplastic stroma in order to increase chemotherapy responsiveness of CCAs.

We will also examine whether circulating tumor cell (CTC) levels with targeted gene expression analysis and stromal SPARC levels correlate with patient outcome and thus serve as prognostic biomarkers. We will evaluate the role of Human Equilibrative Nucleoside Transporter 1 (hENT1), CDA and tumor fibrosis as additional prognostic and predictive biomarkers in CCA. This clinical trial hopes to improve on the poor prognosis of patients with advanced CCA by establishing the activity of a platinum-free doublet, nab-paclitaxel plus gemcitabine that has shown clear clinical benefit in pancreatic cancer which has close biological parallels to CCA.

A maximum of 70 patients will be enrolled to attain 67 eligible/evaluable patients. Stage I will enroll 37 patients. If 21 or more patients are alive and progression-free at 6 months, the study will proceed to Stage II and an additional 33 patients will be enrolled.

Procurement of archived tissue, if available, from a previous diagnostic biopsy is mandatory for enrollment. If not available, this will not preclude participation in the trial, nor will additional biopsies be performed for research purposes only.

Optional blood samples will be requested. ;

Study Design

Related Conditions & MeSH terms

• Cholangiocarcinoma