• Katalin Lumniczky and Géza Sáfrány.
• Országos Sugárbiológiai és Sugáregészségügyi Kutató Igazgatóság, Országos Közegészségügyi Központ, Budapest, Hungary. lumniczky.katalin@osski.hu.
• Magy Onkol. 2016 Mar 2; 60 (1): 46-54.

AbstractThe past three decades of immunology research led to a drastic increase in the knowledge of antitumor immune response mechanisms and in parallel to a rapid development in various antitumor immune therapy strategies. This will most probably result in the implementation of immunotherapeutic protocols within the standard anticancer regimens in a very near future. Though, it is obvious that combination of immunotherapy with traditional anticancer treatment modalities will only be legitimate if the combination has at least an additive, or perhaps a synergistic effect. The similarly dynamic progress in the radiobiological knowledge proved that ionizing radiation does not have a general immune suppressing effect, as it has been thought for decades, but might possess certain immune stimulatory effects, as well. It is also known by now that local irradiation due to its out-of-field effects has systemic immune modulatory capacity, too. In the light of all these novel findings the optimal combination between antitumor immunotherapy and radiotherapy has become an increasing option. The first part of the present review summarizes the main antitumor mechanisms that can be influenced by ionizing radiation, and the second part attempts to provide a comprehensive overview of those antitumor immunotherapeutic modalities that are currently being used in combination with radiotherapy in preclinical and/or clinical trials for the treatment of various tumors.

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