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  • Title: The influence of radiation therapy on T-lymphocyte subpopulations defined by monoclonal antibodies.
    Author: Job G, Pfreundschuh M, Bauer M, zum Winkel K, Hunstein W.
    Journal: Int J Radiat Oncol Biol Phys; 1984 Nov; 10(11):2077-81. PubMed ID: 6238016.
    Abstract:
    We studied the influence of radiation therapy on lymphocyte subpopulations in 17 patients undergoing adjuvant radiation therapy for primary breast cancer, and eight patients receiving brachytherapy and external beam irradiation for primary cancer of the uterus. Radiation therapy reduced B- and T-lymphocytes in proportion to the total lymphocyte population so that their percentages remained unchanged. Determination of helper and suppressor T-lymphocytes before, during and 6 months after completion of radiotherapy revealed that in both groups of patients suppressor T-lymphocytes were more resistant to and recovered faster after radiotherapy. This resulted in a decline of the "immunoregulatory balance" (helper/suppressor ratio). Although this ratio had been higher in both groups of patients than in healthy age- and sex-matched controls before therapy, it became normal and subnormal during and after radiotherapy. The clinical significance of the differential influence of radiotherapy on T-lymphocyte subpopulations remains to be determined.
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