Murine and human T cell factors that induce the differentiation of normal mouse lymphocytes into cytotoxic cells copurify with interleukin 2.
Scand J Immunol
; 22(4): 401-13, 1985 Oct.
Article
em En
| MEDLINE
| ID: mdl-3877979
ABSTRACT
Fetal calf serum (FCS)-specific T promoter cell lines (line 12), clones, or lymphomas produce lymphocyte promoter factors (LPF). These factors are defined as T-cell supernatant activities that induce polyclonal differentiation of normal experimentally unprimed mouse lymphocytes into antibody-forming cells (B-LPF) or into cytotoxic cells (T-LPF). The cytotoxic cells thus induced lysed a broad range of target cells including syngeneic and allogeneic tumour cells and lymphoblasts. We have investigated whether T cell tumours (mouse or human) other than FCS-specific T promoter cell lines (line 12), clones, or lymphomas produce T-LPF activity, and whether T-LPF activity is related to interleukin 2 (IL-2) activity. We found that the EL4 thymoma cells were high producers of T-LPF and IL-2 activity. When EL4 cells and T-LPF+ line 12 lymphomas were cloned, all T-LPF high-producer clones were also high IL-2 producers. In addition, the human Jurkat T tumour cells produced both T-LPF and IL-2 activity which could be detected on both mouse and human lymphocytes. By using biochemical fractionation (size fractionation or chromatofocusing fractionation) and absorption techniques, we could not separate T-LPF and IL-2 activity. Thus, the present data may indicate that the T-LPF and IL-2 activities studied in the present systems are borne by the same molecule(s) (= IL-2?). These results are discussed in relation to current hypotheses on the cellular and molecular requirements for the generation of cytotoxic T cells.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Linfócitos T
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Linfócitos T Citotóxicos
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Interleucina-2
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Citotoxicidade Imunológica
Limite:
Animals
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Female
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Humans
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Male
Idioma:
En
Revista:
Scand J Immunol
Ano de publicação:
1985
Tipo de documento:
Article