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- W2017369076 abstract "A murine footpad tumor model was used to determine the cytotoxic activity, tumor specificity, phenotypic profile, and cytokine production of stimulated cells from draining lymph nodes (DLN). Popliteal DLN from 5-day-old P-815 footpad tumors were stimulated with 10(-7) M phorbol 12, 13-dibutyrate +5 x 10(-7) M ionomycin for 16 hr and cultured in IL-2 (20 units/ml) for 7 or 14 days without autologous tumor. Most cells in both groups were CD3+ (93% at Day 7, 99% at Day 14); however, the percentage of CD8+ cells increased as the cell population matured in the presence of low-dose IL-2. On Day 7, the phenotypic profile was 62% CD4+ and 29% CD8+, whereas on Day 14 it was 16% CD4+ and 81% CD8+. Similarly, in vitro cytokine production increased with time in culture. After 7 days, the level of tumor necrosis factor-alpha (TNF-alpha) was 220 pg/mL and the interferon-gamma (IF-gamma) production was 150 pg/ml. At Day 14 the TNF level had increased to 500 pg/ml, and IF production had increased to 350 pg/ml. These increases in the CD8+ population and in cytokine production correlated with the increase in the percentage of target cells killed by the DLN cells. Cytolytic activity against P-815 was only 13% on Day 7 but 39% on Day 14. Neither group of effector cells (Day 7 or Day 14) had any cytolytic activity against the syngeneic tumor cell line L-1210, demonstrating the tumor specificity of the DLN cells. We describe a model for generating tumor-specific cytotoxic T-cells that have significant cytokine production, which may account for previously described in vivo activity." @default.
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- W2017369076 title "In Vitro Cytolytic Activity of Lymphocytes from Tumor-Draining Lymph Nodes Is Associated with Increased Numbers of CD8+ Cells and Increased Cytokine Production" @default.
- W2017369076 doi "https://doi.org/10.1006/jsre.1995.1006" @default.
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