Combining α-Radioimmunotherapy and Adoptive T Cell Therapy to Potentiate Tumor Destruction

• Published in: PloS one Vol. 10; no. 6; p. e0130249
• Main Authors: Ménager, Jérémie, Gorin, Jean-Baptiste, Maurel, Catherine, Drujont, Lucile, Gouard, Sébastien, Louvet, Cédric, Chérel, Michel, Faivre-Chauvet, Alain, Morgenstern, Alfred, Bruchertseifer, Frank, Davodeau, François, Gaschet, Joëlle, Guilloux, Yannick
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 22.06.2015; Public Library of Science (PLoS)
• Subjects: Adoptive transfer; Adoptive Transfer - methods; Animal models; Animals; Antibodies, Monoclonal - immunology; Antigens; Antigens, Neoplasm - immunology; Apoptosis; Bismuth; Bismuth - immunology; Bismuth isotopes; Cancer; Cancer therapies; CD8 antigen; CD8-Positive T-Lymphocytes - immunology; Cell- and Tissue-Based Therapy - methods; Combined Modality Therapy - methods; Combined treatment; Cytotoxicity; Disease Models, Animal; Effectiveness; Female; Immune response; Immune system; Immunogenicity; Immunosuppression; Immunotherapy; Ionizing radiation; Irradiation; Life Sciences; Lymphocytes; Lymphocytes T; Mice; Mice, Inbred C57BL; Multiple myeloma; Multiple Myeloma - immunology; Multiple Myeloma - therapy; Ovalbumin - immunology; Radiation; Radiation therapy; Radioimmunotherapy - methods; Studies; Syndecan-1 - immunology; Tumor cells; Tumors; France; Germany
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0130249

Ionizing radiation induces direct and indirect killing of cancer cells and for long has been considered as immunosuppressive. However, this concept has evolved over the past few years with the demonstration that irradiation can increase tumor immunogenicity and can actually favor the implementation of an immune response against tumor cells. Adoptive T-cell transfer (ACT) is also used to treat cancer and several studies have shown that the efficacy of this immunotherapy was enhanced when combined with radiation therapy. α-Radioimmunotherapy (α-RIT) is a type of internal radiotherapy which is currently under development to treat disseminated tumors. α-particles are indeed highly efficient to destroy small cluster of cancer cells with minimal impact on surrounding healthy tissues. We thus hypothesized that, in the setting of α-RIT, an immunotherapy like ACT, could benefit from the immune context induced by irradiation. Hence, we decided to further investigate the possibilities to promote an efficient and long-lasting anti-tumor response by combining α-RIT and ACT. To perform such study we set up a multiple myeloma murine model which express the tumor antigen CD138 and ovalbumine (OVA). Then we evaluated the therapeutic efficacy in the mice treated with α-RIT, using an anti-CD138 antibody coupled to bismuth-213, followed by an adoptive transfer of OVA-specific CD8+ T cells (OT-I CD8+ T cells). We observed a significant tumor growth control and an improved survival in the animals treated with the combined treatment. These results demonstrate the efficacy of combining α-RIT and ACT in the MM model we established.