ISSN:
1432-0851
Keywords:
TNFα
;
CD8+ CTL
;
IL-2R
;
TIL/TAL
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary We have recently reported that autologous tumor-specific cytotoxic T lymphocyte (CTL) lines and clones can be developed from lymphocytes infiltrating ovarian malignant ascites (TAL). In this study, we investigated the biological effects of tumor necrosis factor α (TNFα) in the induction, expansion, long-term proliferation and lytic function of CD8+ TAL. TNFα up-regulated the IL-2 receptor (IL-2R) α chain (Tac antigen) on the surface of CD3+ CD8+ CD4− TAL, enhanced the proliferation of autologous tumor-specific CTL, and potentiated their lytic function in long-term cultures. Furthermore, in the induction and expansion phase of CD8+ TAL, the presence of TNFα was associated with a selective increase in CD8+ IL-2R+ (Tac+) cells, and subsequent decrease in CD4+ IL-2R+ (Tac+) cells. These results suggest that the observed facilitation of the outgrowth of CD8+ cells in TAL cultures may be due, at least in part, to the up-regulation of IL-2R, and indicate the usefulness of TNFα in the analysis of signalling in autologous tumor-reactive CTL.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01741854
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