Heat Shock Treatment of Tumor Lysate-Pulsed Dendritic Cells Enhances Their Capacity to Elicit Antitumor T Cell Responses against Medullary Thyroid Carcinoma
| Autor: | Anton Stift, Josef Friedl, Michaela Strohschneider, Thomas Bachleitner-Hofmann, Michael Gnant, Roswitha Pfragner, Hubert Hayden, Peter Krieger, Monika Sachet, Peter Dubsky, Sebastian F. Schoppmann |
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| Rok vydání: | 2006 |
| Předmět: |
Adult
Cell Extracts Male medicine.medical_specialty Endocrinology Diabetes and Metabolism T cell medicine.medical_treatment Clinical Biochemistry Genes MHC Class I In Vitro Techniques Lymphocyte Activation Biochemistry Endocrinology Immune system Antigen HLA Antigens Internal medicine MHC class I Tumor Cells Cultured medicine Humans Cytotoxic T cell HSP70 Heat-Shock Proteins HSP90 Heat-Shock Proteins Thyroid Neoplasms Antigen-presenting cell Aged biology business.industry Biochemistry (medical) Cell Differentiation Dendritic Cells Hyperthermia Induced T lymphocyte Immunotherapy Middle Aged Toll-Like Receptor 2 Toll-Like Receptor 4 medicine.anatomical_structure Carcinoma Medullary Antigens Surface biology.protein Female business Heat-Shock Response T-Lymphocytes Cytotoxic |
| Zdroj: | The Journal of Clinical Endocrinology & Metabolism. 91:4571-4577 |
| ISSN: | 1945-7197 0021-972X |
| DOI: | 10.1210/jc.2006-0971 |
| Popis: | Background: In vitro and in vivo studies have shown that dendritic cells (DCs) can stimulate antitumor T cell responses against medullary thyroid carcinoma (MTC). However, despite promising results in selected cases, the clinical efficacy of DC immunotherapy in patients with MTC has been limited. Recently, it has been demonstrated in mice that heat shock enhances the capacity of bone-marrow-derived DCs to stimulate antigen-specific T cells. The aim of our investigations was to evaluate whether heat shock also increases the capacity of human monocyte-derived DCs to stimulate antitumor T cell responses against MTC tumor cells. Methods: DCs from six patients with metastatic MTC were pulsed with tumor lysate derived from allogeneic MTC tumor cells and were heat shocked for 12 h at 40 C or kept at 37 C. Thereafter, the DCs were matured and cocultured with T cells. Finally, the cytotoxic activity of T cells against MTC tumor cells was measured in vitro. Results: In all patient samples, cytotoxic T cell responses against MTC tumor cells could be induced. Notably, heat-shocked DCs were more potent stimulators of cytotoxic T cell responses than control DCs, with T cells stimulated with heat-shocked DCs displaying a significantly increased cytotoxic activity against MTC tumor cells as compared with T cells stimulated with control DCs. In none of the experiments was a cytotoxic T cell response against unrelated pancreatic tumor cells (PANC-1) observed, using both control and heat-shocked DCs. Conclusions: Our study shows that heat-shocking DCs may be a valuable strategy to increase the immunostimulatory capacity of DCs used for immunotherapy of MTC. |
| Databáze: | OpenAIRE |
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