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Oncoimmunology. 2018 Aug 27;7(11):e1496881. doi: 10.1080/2162402X.2018.1496881. eCollection 2018.

Impact of curative radiotherapy on the immune status of patients with localized prostate cancer.

Oncoimmunology

Franziska Eckert, Philipp Schaedle, Daniel Zips, Barbara Schmid-Horch, Hans-Georg Rammensee, Cihan Gani, Cécile Gouttefangeas

Affiliations

  1. Department of Radiation Oncology, University Hospital Tuebingen, Eberhard-Karls-University Tuebingen, Tuebingen, Germany.
  2. German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ) Partner Site Tuebingen, Tuebingen, Germany.
  3. Interfaculty Institute for Cell Biology, Department of Immunology, Eberhard-Karls-University Tuebingen, Tuebingen, Germany.
  4. Department for Internal Medicine I, Marienhospital Stuttgart, Stuttgart, Germany.
  5. Institute for Clinical and Experimental Transfusion Medicine, University Hospital Tuebingen, Eberhard-Karls-University, Tuebingen, Germany.

PMID: 30393582 PMCID: PMC6208674 DOI: 10.1080/2162402X.2018.1496881

Abstract

Combination of radiotherapy with immunotherapy has become an attractive concept for the treatment of cancer. The objective of this study was to assess the effect of curative, normofractionated radiotherapy on peripheral immune lymphocytes in prostate cancer patients, in order to propose a rationale for scheduling of normofractionated radiotherapy with T-cell based immunotherapy. In a prospective study (clinicaltrials.gov: NCT01376674), eighteen patients with localized prostate cancer were treated with radiotherapy with or without hormonal therapy. Irradiation volumes encompassed prostate and, in select cases, elective pelvic nodal regions. Blood samples were collected from all patients before, during, and after radiotherapy, as well as from 6 healthy individuals as control. Normofractionated radiotherapy of prostate cancer over eight weeks had a significant influence on the systemic immune status of patients compared to healthy controls. Absolute leukocyte and lymphocyte counts decreased during treatment as did peripheral blood immune subsets (T cells, CD8

Keywords: Prostate cancer; T cells; immunotherapy; peripheral lymphocytes; radiotherapy

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