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Clinical Trial Summary

This is an exploratory observational biomarker study in approximately 100 eligible patients with resectable adenocarcinomas of the esophagus and gastro- esophageal junction (GEJ) type I-II (GEAC) to investigate the difference deletion frequency of circulating tumor cells (CTCs) between peripheral veins and tumor-draining veins (primary endpoint), prognostic value, relevance of a set of two additional blood-based biomarkers analyzed from a single blood sampling tube (secondary endpoints). The underlying hypothesis is that the biomarker alone or in combination improve preoperative staging and help to identify patients at risk for metastasis. This should enable a better stratification of GEAC patients to neo-adjuvant treatment, (intensified) peri-operative treatment, or even surgery alone, in selected cases. The data of the CIRCULATE study shall be used design subsequent studies testing the predictive role of these biomarkers for surgical management. Patients will provide blood samples and lymphatic fluid during the operation and annual blood samples during clinical follow up of 5 years.


Clinical Trial Description

This is an exploratory observational biomarker study. Around 20 mL of blood will be collected from a peripheral vein and additional 40 mL from tumor draining veins. In addition, around 5 mL of lymphatic fluid will be collected from the thoracic duct, when exposed and opened during the surgical resection. Annual blood draws (20 mL) will be performed during routine clinical follow-up or at the time point when the patients develops a (metastatic) relapse. A one tube protocol will be performed from each blood sample to assess CTCs and tumor derived extracellular Vesicles (tdEVs) using CELLSEARCH® and ACCEPT (https://github.com/LeonieZ/ACCEPT/blob/master/ACCEPT.m). In addition, tumor cells will be enumerated by CELLSEARCH® in the lymphatic fluid. ctDNA will be extracted from plasma of each blood collection tube and analyzed by mFAST-SeqS. If the mutational status of the primary tumor is known, deep sequencing of ctDNA will be applied for mutation tracking at a later time point. Tissue resected during the surgical procedure and not required for routine pathology will be collected into a biobank (cry-conserved and formalin fixed and paraffin embedded (FFPE). ;


Study Design


Related Conditions & MeSH terms


NCT number NCT04455282
Study type Observational
Source Heinrich-Heine University, Duesseldorf
Contact Nikolas H Stoecklein, MD
Phone 004921181
Email Nikolas.Stoecklein@med.uni-duesseldorf.de
Status Recruiting
Phase
Start date February 1, 2021
Completion date January 30, 2028

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