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Radiation-immunotherapy Combination can Help Treat Tumours

by Sheela Philomena on May 1, 2016 at 12:09 PM
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The induced immune response of radiation therapy against the tumor can be extended by the addition of an immune system-strengthening compound.

As per Nicolle Rekers from Maastricht University Medical Centre, a combination of radiation therapy and L19-IL2, an immunotherapy agent, can increase significantly the immune response when given to mice with primary colorectal tumors.

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 Radiation-immunotherapy Combination can Help Treat Tumours
Radiation-immunotherapy Combination can Help Treat Tumours

L19-IL2 is a combination of an antibody that targets the tumor blood vessels and a cytokine, a small protein important in cell signalling in the immune system. The researchers found not only that the mice were tumor-free following treatment, but also that when re-injected with cancer cells 150 days after cure, they did not form new tumors. There was also an increase in the number of cells with an immunological memory.

Rekers said that radiation therapy damages the tumor creating a sort of tumor-specific vaccine. It feeds the immune system and ensures that it notices that something is wrong. What is unique about the latest experiments is that researchers have been able to create a so-called abscopal effect, where a localised radiation treatment has also had an effect on other tumor sites outside this radiation field. "We believe that the risk/benefit equation is likely to come down firmly on the side of benefit. We hope that this treatment will not only destroy tumors, but also enable the immune system to develop a memory that allows it to annihilate them in the future as well," Ms Rekers will conclude. The study has been presented to the ESTRO 35 conference. (ANI)

Source: ANI
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