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SEPARATION AND FUNCTIONAL ANALYSIS OF TUMOR-INFILTRATING LYMPHOCYTES IN BRAIN TUMOR TISSUES Takafumi Saito 1 , Ryuichi Tanaka 1 , Nobuyuki Takai 1 , Naoyuki Hara 1 , Seiichi Yoshida 1 1Department of Neurosurgery, Brain Research Institute, Niigata University pp.1137-1142
Published Date 1988/12/1
DOI https://doi.org/10.11477/mf.1406206219

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  • Abstract
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Separation of tumor-infiltrating lymphocytes (TIL) from surgical specimen of fourteen gliomas and 6 metastatic brain tumor tissues was achieved by discontinuous density gradients. Comparison of phenotypes between separated lymphocytes and TIL in situ was examined by immunohistochemical method using monoclonal antibodies. The cytotoxic activity of these separated lymphocytes was also examined in short-term 51Cr release assay against fresh autologous tumor cells. Immunohistochemical staining of separated lymphocytes revealed the preservation of cell surface antigens of the lym-phocytes. Most of separated lymphocytes were T lymphocytes and both phenotypes cytotoxic/sup-pressor and helper/inducer T lymphocytes were found. The Leu-3a/2a ratio of separated lym-phocytes were compared with TIL in situ in the same patients and these values were almost equal in both lymphocytes. Cell number of separated lymphocytes were 1.2×105-2.1×105/g in glioma and 1.1×105-3.8×105/g in metastatic patients. Cytotoxicity against autologous tumor cells was detected in 5 out of 12 glioma and 2 out of 6 me-tastatic patients. There was no correlation between the cytotoxicity and cell number of separated lymphocytes or HLA-DR antigen expression on tumor cells.


Copyright © 1988, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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