Interactions of the allogeneic effector leukemic T cell line, TALL-104, with human malignant brain tumors
Autor: | Carol A. Kruse, German G. Gomez, Susana B. Read, Adam Zweifach, Lazaro E. Gerschenson, Daniela Santoli |
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Rok vydání: | 2004 |
Předmět: |
Cytotoxicity
Immunologic Cancer Research Leukemia T-Cell T cell Apoptosis Cell Communication Biology Cell therapy Necrosis Cell Line Tumor Glioma medicine Humans Cytotoxic T cell Antigen-presenting cell Lymphokine-activated killer cell Brain Neoplasms Natural killer T cell medicine.disease Coculture Techniques Cell biology medicine.anatomical_structure Oncology Basic and Translational Investigations Interleukin 12 Cancer research Cytokines Neurology (clinical) T-Lymphocytes Cytotoxic |
Zdroj: | Neuro-Oncology. 6:83-95 |
ISSN: | 1523-5866 1522-8517 |
Popis: | TALL-104 is a human leukemic T cell line that expresses markers characteristic of both cytotoxic T lymphocytes and natural killer cells. TALL-104 cells are potent tumor killers, and the use of lethally irradiated TALL-104 as cellular therapy for a variety of tumors has been explored. We investigated the interactions of TALL-104 cells with human brain tumor cells. TALL-104 cells mediated increased lysis of a panel of brain tumor cells at low effector-to-target ratios over time. We obtained evidence that TALL-104 cells injured glioma cells by both apoptotic and necrotic pathways. A 7-amino actinomycin D flow cytometry assay revealed that the percentages of both apoptotic and necrotic glioma cells increased after TALL-104 cell/glioma cell coincubations. Fluorescent microscopy studies and a quantitative morphologic assay confirmed that TALL-104 cell/glioma cell interactions resulted in tumor cell apoptosis. Cytokines are secreted when TALL-104 cells are coincubated with brain tumor cells; however, morphologic analysis assays revealed that the soluble factors contained within clarified supernates obtained from 4 h coincubates added back to brain tumor cell cultures did not trigger the glioma apoptosis. TALL-104 cells do not express Fas ligand, even upon coincubation with glioma targets, which suggests that the Fas/Fas ligand apoptotic pathway is not likely responsible for the cell injury observed. We obtained evidence that cell injury is calcium dependent and that lytic granule exocytosis is triggered by contact of TALL-104 cells with human glioma cells, suggesting that this pathway mediates glioma cell apoptosis and necrosis. |
Databáze: | OpenAIRE |
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