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- W2002072541 abstract "Summary: Conditions for generating and expanding cytotoxic tumor-specific, tumor-infiltrating lymphocytes (TIL) were studied to improve the efficacy of adoptive cancer immunotherapy. Thus, we have examined the growth and cytolytic patterns of bulk culture TIL from human renal cell carcinoma (RCC) cultured in low (20 U/ml) or high (1,000 U/ml) dose interleukin (IL)-2, with or without irradiated autologous tumor stimulation. By 55 days in culture, TIL grown in the presence of IL-2 without tumor stimulation lost their lytic activity, whereas those exposed to tumor stimulation maintained high levels of cytotoxicity against autologous and/or nonautologous tumor targets. Only TIL grown with low dose IL-2 and autologous tumor maintained long-term (over 4 months in culture) specific cytotoxicity against the autologous tumor, even upon cryopreservation and regrowth. These TIL were 88-97% and 80% positive for CD3 and CD8, with a persistent subset exhibiting CD4+ CD8+ double positive staining. Their specific cytotoxic activity was major histocompatibility complex Class I-restricted and inhibited by pretreating the TIL with anti-CD3 monoclonal antibody. TIL exposed to the four types of culture conditions, low or high dose IL-2, with or without irradiated autologous tumors, and exhibiting different lytic specificities, all expressed mRNA for interferon-gamma and tumor necrosis factor (TNF)-alpha, but not for IL-1-beta, IL-4, IL-6, and granulocyte- macrophage colony stimulating factor. The degree of TNF-alpha mRNA expression correlated with the degree of autologous tumor-specific cytotoxicity of these TIL. This initial report demonstrates that antigen-specific cytotoxicity against the autologous tumor does, in fact, exist within the RCC tumors. Furthermore, by modifying culture conditions, cytotoxic T-lymphocytes with anti-tumor activity can be selectively grown from the heterogeneous bulk cultures of TIL." @default.
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- W2002072541 date "1991-10-01" @default.
- W2002072541 modified "2023-09-29" @default.
- W2002072541 title "Autologous Tumor-Specific Cytotoxicity of Tumor-Infiltrating Lymphocytes Derived from Human Renal Cell Carcinoma" @default.
- W2002072541 doi "https://doi.org/10.1097/00002371-199110000-00006" @default.
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