Volume 8 Supplement 1

5th European Workshop on Immune-Mediated Inflammatory Diseases

Open Access

Skin-derived tumor specific T cells predict clinical outcome in dendritic cell vaccination studies in both stage III and IV melanoma patients

  • EHJG Aarntzen1,
  • W J Lesterhuis1,
  • M Van Rossum1,
  • G J Adema1,
  • C F Figdor1,
  • CJA Punt1 and
  • IJM De Vries1
Journal of Translational Medicine20108(Suppl 1):I3

https://doi.org/10.1186/1479-5876-8-S1-I3

Published: 25 November 2010

Introduction

Dendritic cells (DCs) are the professional antigen-presenting cells of the immune system. Their decisive role in inducing immunity formed the rationale for DC immunotherapy: DC loaded with tumor antigens are injected into cancer patients to stimulate T cells to eradicate tumors.

Aim

To improve immunotherapy against cancer, adequate tumor specific immune monitoring is essential. Here, we evaluate our monitoring tools to predict clinical outcome to DC-based vaccination in melanoma patients.

Patients and methods

In our ongoing trials, HLA-A2.1 positive stage III and IV melanoma patients are vaccinated with DC loaded with gp100 and tyrosinase and control antigen keyhole limpet hemocyanin (KLH). Routine monitoring consisted of KLH specific responses in peripheral blood and tumor specific response in blood and cultures from DTH site biopsies.

Results

Upon vaccination, almost all patients showed proliferative and humoral responses to KLH. Tumor specific CD8+ T cells are rarely detected in peripheral blood and coincided with the presence of tumor specific CD8+ T cells in DTH site cultures [1]. We show the strong predictive value of presence of functional tumor specific CD8+ T cells in DIL cultures for PFS and overall survival (OS) in metastatic melanoma patients, and show similar significant correlation for PFS in stage III melanoma patients.

Conclusion

Monitoring of KLH specific proliferative responses or tumor-specific T cells in peripheral blood was not predictive for improved clinical outcome. Our findings show that the presence of functional tumor-specific T cells in DTH site biopsies predict clinical outcome.

Authors’ Affiliations

(1)
Dept. of Tumor Immunology and Medical Oncology, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre

References

  1. De Vries IJM, Bernsen MR, Lesterhuis WJ, Scharenborg NM, Strijk SP, Gerritsen MJ, Ruiter DJ, Figdor CG, Punt CJ, Adema GJ: Immunomonitoring tumor-specific T cells in delayed-type hypersensitivity skin biopsies after dendritic cell vaccination correlates with clinical outcome. J Clin Oncol. 2005, 20: 5779-5787. 10.1200/JCO.2005.06.478.View ArticleGoogle Scholar

Copyright

© De Vries et al; licensee BioMed Central Ltd. 2010

This article is published under license to BioMed Central Ltd.

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