Comparative analysis of the effects of radiotherapy versus radiotherapy after adjuvant chemotherapy on the composition of lymphocyte subpopulations in breast cancer patients
| Autor: | Eva K. Sage, Michael Sedelmayr, Gabriele Multhoff, Mathias Gehrmann, Thomas Schmid, Hans Geinitz, Stephanie E. Combs, Marciana Nona Duma |
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| Rok vydání: | 2016 |
| Předmět: |
Adult
0301 basic medicine Oncology medicine.medical_specialty Lymphocyte medicine.medical_treatment Breast Neoplasms 03 medical and health sciences 0302 clinical medicine Breast cancer T-Lymphocyte Subsets Internal medicine medicine Humans Radiology Nuclear Medicine and imaging Aged Chemotherapy business.industry FOXP3 Cancer Chemoradiotherapy Hematology Middle Aged medicine.disease Radiation therapy 030104 developmental biology medicine.anatomical_structure Chemotherapy Adjuvant 030220 oncology & carcinogenesis Immunology Female business Adjuvant |
| Zdroj: | Radiotherapy and Oncology. 118:176-180 |
| ISSN: | 0167-8140 |
| Popis: | Background Breast cancer is the most common cancer in women worldwide and surgery, radiotherapy (RT) and chemotherapy (ChT) are frequently used to treat this cancer. Adjuvant RT has been shown to cause long-term changes in lymphocyte counts in the peripheral blood. Herein, the time course of changes in lymphocyte subpopulations upon RT was studied in patients with and without adjuvant ChT in order to explore its potential clinical impact. Materials and methods Total lymphocyte counts and the composition of lymphocyte subpopulations before RT (t0), after 30Gy (t1), at the end of RT (t2), and 6weeks (t3), 6months (t4), and 1year (t5) after RT were studied by flow cytometry. Results Absolute lymphocyte counts were significantly lower in all breast cancer patients ( n =40) before and also 1year after RT compared to healthy controls. The percentage of CD3 + /CD4 + helper T cells and FoxP3 + regulatory T cells increased significantly in patients without adjuvant ChT. Different NK cell subpopulations dropped during RT in patients with and without ChT, but recovered to initial levels 6months after RT (t4). During RT (t0–t2) the percentage of CD19 + B cells significantly dropped in patients without ChT, but gradually increased in patients with adjuvant ChT. Both patient groups reached initial levels 6months after RT (t4). Conclusion Different lymphocyte subpopulations respond differently to RT with and without adjuvant ChT. CD4 + T cells increase during RT, whereas NK cells and B cells decrease in patients without ChT, but recover within 6months after RT. Treg cells gradually increase in patients without ChT from t0 to t5, but not in patients with adjuvant ChT. |
| Databáze: | OpenAIRE |
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