Effect on Tumor Perfusion of a Chemotherapy Combining Gemcitabine and Vismodegib Before Surgery in Pancreatic Cancer (NEOPACHI-001)
Recruitment status was: Not yet recruiting
Pancreatic ductal adenocarcinoma (PDAC) has one of the worst prognoses of all human cancers and is considered as a sanctuary, resistant to most of the drugs used. Identification of new molecular targets involved in its pathogenesis is urgently needed and required both proper and innovative efficacy assessment.
This proof-of-concept trial is studying the "dynamic" tumor response after the administration of a short course (4 weeks) neoadjuvant combination of gemcitabine and a Hedgehog inhibitor (Vismodegib) before surgery in patients with operable pancreatic cancer.
Pancreatic Adenocarcinoma Resectable
Procedure: Neoadjuvant chemotherapy
|Study Design:||Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||Evaluation of Tumoral Perfusion Modification by Dynamic Imaging After Neoadjuvant Chemotherapy Combining Gemcitabine and a Hedgehog Inhibitor (Vismodegib) in Patients With Resectable Pancreatic Adenocarcinoma|
- "Dynamic" tumor response rate as defined by a 20% modification of tumoral perfusion and cellular density parameters. [ Time Frame: 4 weeks (duration of the neoadjuvant chemotherapy). ]In order to detect changes in the tumor microenvironment and to monitor treatment efficacy, Dynamic Contrast-Enhanced-Magnetic Resonance Imaging (DCE-MRI) and Diffusion Weighted-Magnetic Resonance Imaging (DW-MRI) constitute tools more and more used. The acquired data can be analyzed using a pharmacokinetic model to obtain quantitative parameters relative to tissue perfusion and vascular permeability (Ktrans, a volume transfer constant of contrast agent between blood plasma and the extravascular extracellular space; Apparent Diffusion Coefficient as a surrogate marker of tissue cellularity). DCE/DW-MRI will be achieved weekly before each neoadjuvant chemotherapy treatment and before surgery. Each patient will be his/her own control by comparing serial imaging results with those of the baseline MRI.
- Number of participants with adverse events as assessed by National Cancer Institute (NCI) Common Toxicity Criteria for Adverse Effects (CTCAE) V4.0. [ Time Frame: End of study follow-up (up to 2 years). ]Number of participants with (serious) adverse events will be considered as a measure of safety of the whole therapeutic sequence (gemcitabine + Hedgehog inhibitor+ surgery).
- Tumor response as assessed by Response Evaluation Criteria in Solid Tumors (RECIST) criteria. [ Time Frame: 4 weeks (duration of the neoadjuvant chemotherapy). ]
- Effect of treatment on selected biomarkers in tumor resection specimens. [ Time Frame: 4 weeks (duration of the neoadjuvant chemotherapy). ]The objective is to identify within pre-therapeutic samples and surgical specimens several specific biomarkers involved (1) in the Hedgehog signalling pathway (GLI1, Sonic Hedgehog, Patched, Smoothened immunohistochemical patterns protein expression) and predicting response to anti-Hh therapy, (2) in the metabolization of gemcitabine (human equilibrative nucleoside transporter 1, deoxycytidine kinase) and predicting response to gemcitabine therapy, and (3) in the relative contribution of both anti-Hh therapy and gemcitabine therapy.
|Study Start Date:||December 2012|
|Estimated Study Completion Date:||December 2016|
|Estimated Primary Completion Date:||June 2014 (Final data collection date for primary outcome measure)|
Neoadjuvant chemotherapy combining gemcitabine and Vismodegib during 4 weeks before surgery
Administrated intravenously at a dose of 1000 mg/m2 over 30 minutes weekly, week 1 to 4
Other Name: GEMZARDrug: Vismodegib
150 mg capsule, oral, once daily
Other Name: GDC-0449Procedure: Neoadjuvant chemotherapy
Combination of gemcitabine and Vismodegib during a window interval (4 weeks) before surgery
Please refer to this study by its ClinicalTrials.gov identifier: NCT01713218
|Antwerp University Hospital (UZA)|
|Edegem, Antwerpen, Belgium, 2650|
|Erasme University Hospital (ULB)|
|Brussels, Belgium, 1070|
|Principal Investigator:||Jean-Luc Van Laethem, MD, PhD||Erasme University Hospital|