Matsuhisa T
Department of Neurological Surgery, Okayama University Medical School, Japan.
No To Shinkei. 1995 May;47(5):466-73.
It has already been reported that T cell infiltration is observed in brain tumor tissue but that general cellular immunity is suppressed in malignant brain tumor patients. In this report, the subsets of tumor infiltrating lymphocytes (TILs) and peripheral blood lymphocytes (PBLs) were analyzed in 8 patients with malignant glioma in order to investigate the relationship between the local and systemic immunological response in malignant brain tumor patients. TIL subsets in surgical specimens were analyzed immunohistochemically using the ABC method and monoclonal antibodies of the Leu series (anti-Leu 2a, 3a + b, 4 + 5b, 7, 12 and M5), and identified more precisely by double immunofluorescence staining (DIFS) using paired fluorescein isothiocyanate (FITC)-Leu 3a + b and phycoerythrin (PE)-Leu8 or FITC-Leu 2a and PE-Leu 15. PBL subsets were determined preoperatively by two-color analysis with a fluorescence-activated cell sorter (FACS) using fluorescence-labeled monoclonal antibodies (paired FITC-Leu 4 and PE-Leu 12, FITC-Leu 3a and PE-Leu 8, or FITC-Leu 2a and PE-Leu 15). Most TILs proved to be T lymphocytes containing Leu 3a + b+ (T helper/inducer) cells and Leu 2a+ (T suppressor/cytotoxic) cells in almost equal numbers, but there were too few TILs to kill the tumor cells. Detailed examination by DIFS revealed that 93% of the Leu 3a + b+ cells were helper T cells (Leu3a + b+.Leu8- cells) and that 88% of the Leu 2a+ cells were cytotoxic T cells (Leu 2a+.Leu15- cells). Analysis of PBLs showed statistically significant decreases in T cells as a whole and in helper T cells (Leu 3a+.Leu 8- cells).(ABSTRACT TRUNCATED AT 250 WORDS)
