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Carcinoembryonic Antigen-loaded Dendritic Cells in Advanced Colorectal Cancer Patients

Colorectal Cancer Clinical Trial

Official title:
Induction of Specific T Cell Responses in Colorectal Cancer Patients With Liver Metastases Upon Vaccination With Autologous Dendritic Cells Pulsed With CEA-peptide or Electroporated With CEA-RNA: Evaluation of in Vivo Immune Response.

Clinical Trial Summary

Dendritic cells (DCs) are the professional antigen-presenting cells of the immune system. As such they are currently used in clinical vaccination protocols in cancer patients. We evaluate the ability of mature DCs pulsed with carcinoembryonic antigen (CEA)-peptide (arm A) or electroporated with CEA-mRNA (arm B) to induce CEA-specific T cell responses in patients with resectable liver metastases from colorectal cancer. To evaluate immune responses, CEA-specific T cell reactivity is monitored in peripheral blood, resected abdominal lymph nodes, tumor tissue and biopsies of vaccination sites and post-treatment DTH skin tests. Patients are vaccinated intradermally and intravenously with CEA-peptide pulsed mature DCs three times prior to resection of liver metastases. In 2007 a side-study has been added (arm C), in which patients with stage III or high-risk stage II colorectal cancer that are amenable for standard adjuvant oxaliplatin/capecitabine therapy are vaccinated with CEApeptide-pulsed DCs. Also in this group, safety and immune responses in peripheral blood and the DTH-skin test are the primary endpoints. Results are compared with the results obtained in arm A.

Clinical Trial Description

n/a

Study Design

Allocation: Non-Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT00228189
Study type Interventional
Source Radboud University
Contact
Status Completed
Phase Phase 1/Phase 2
Start date December 2003
Completion date November 2010
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