Rat mitogen-stimulated lymphokine-activated T killer cells: production and effects on C6 glioma cells in vitro and in vivo in the brain of Wistar rats.
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| Abstract |
An in vitro technique was developed to generate activated rat T cells, with antitumor activity. Splenic mononuclear cells (SMC) from outbred Wistar and inbred Wistar-Munich rats were stimulated with Concanavalin A and recombinant human interleukin-2 (rIL-2) in vitro for 48 h. After 2 days, the nonadherent cells began proliferating and were maintained in rIL-2 for up to 18 days in vitro. FACScan analysis revealed that SMC was a mixture of cell types; however, CD5+ T cells rapidly increased and became the predominant cell type after 5 days in culture. SMC induced cytolysis of YAC-1, but not C6 glioma cells in 4 h 51Cr release assays. In contrast, 5- and 9-day T cells lysed C6 glioma and YAC-1 cells. The C6 cells were admixed with cultured effector cells at various effector-to-target (E:T) ratios and were injected into the right cerebral hemisphere of Wistar and Wistar-Munich rats for a Winn assay. Histopathologic evaluations revealed that a) SMC had no effect; b) 2- and 5-day T cells, injected at E:T ratios greater than 5:1, caused significant reduction in tumor size; and c) 2- or 5-day T cells, at a 40:1 E:T ratio, resulted in little or no histologic evidence of tumor. Eighty-three percent of animals receiving C6 and 5-day mitogen-stimulated lymphokine activated killer cells at an E:T ratio of 40:1 were alive 120 days postinjection (p less than 0.05).
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| Authors | W E Carson 3rd, J G Jakowatz, R Yamamoto, T Fitzgerald, S Gupta, B Vayuvegula, J A Lucci 3rd, M T Beckman, S Dulkanchainun, G A Granger |
| Journal | Journal of immunotherapy : official journal of the Society for Biological Therapy (J Immunother (1991)) Vol. 10 Issue 2 Pg. 131-40 (Apr 1991) ISSN: 1053-8550 [Print] United States |
| PMID | 2043593 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't) |
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