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Title: Changes in peripheral immune cells after intraoperative radiation therapy in low-risk breast cancer
Author: Linares Galiana, Isabel
Berenguer Francés, Miguel Ángel
Cañas Cortés, Rut
Pujol Canadell, Monica
Comas Antón, Silvia
Martínez, Evelyn
Laplana, Maria
Pérez Montero, Héctor
Pla Farnós, María Jesús
Navarro Martin, Arturo
Nuñez, Miriam
Both, Brigitte
Guedea Edo, Ferran
Keywords: Càncer de mama
Breast cancer
Issue Date: Jan-2021
Publisher: Oxford University Press
Abstract: A detailed understanding of the interactions and the best dose-fractionation scheme of radiation to maximize antitumor immunity have not been fully established. In this study, the effect on the host immune system of a single dose of 20 Gy through intraoperative radiation therapy (IORT) on the surgical bed in low-risk breast cancer patients undergoing conserving breast cancer has been assessed. Peripheral blood samples from 13 patients were collected preoperatively and at 48 h and 3 and 10 weeks after the administration of radiation. We performed a flow cytometry analysis for lymphocyte subpopulations, natural killer cells (NK), regulatory T cells (Treg) and myeloid-derived suppressor cells (MDSCs). We observed that the subpopulation of NK CD56+high CD16+ increased significantly at 3 weeks after IORT (0.30-0.42%, P < 0.001), while no changes were found in immunosuppressive profile, CD4+CD25+Foxp3+Helios+ Treg cells, granulocytic MDSCs (G-MDSCs) and monocytic MDSCs (Mo-MDSCs). A single dose of IORT may be an effective approach to improve antitumor immunity based on the increase in NK cells and the non-stimulation of immunosuppressive cells involved in immune escape. These findings support future combinations of IORT with immunotherapy, if they are confirmed in a large cohort of breast cancer patients.
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It is part of: Journal of Radiation Research, 2021, vol. 62, num. 1, p. 110-118
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ISSN: 0449-3060
Appears in Collections:Articles publicats en revistes (Institut d'lnvestigació Biomèdica de Bellvitge (IDIBELL))
Articles publicats en revistes (Ciències Clíniques)

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