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- W4313310136 abstract "Abstract The in vitro activation of murine thymus-derived (T) lymphocytes by soluble protein and synthetic antigens has been difficult to assess because of the lack of a specific and reliable proliferation assay. The present report describes the development of an assay system which overcomes these problems by making use of a population of nylon wool column-purified T lymphocytes obtained from thioglycol-late-induced peritoneal exudates of immunized mice. PETLES (peritoneal exudate, T lymphocyte-enriched cells) were composed mainly of T lymphocytes, eosinophils and small numbers of macrophages. Contamination with bone marrow-derived (B) lymphocytes averaged only 2%. When PETLES from immunized mice were stimulated in microtiter cultures with the immunizing antigen, large degrees of proliferation ensured as measured by incorporation of 3H-methyl-thymidine 5 days after initiation. As few as 1.25 × 104 cells and as little as 50 ng/ml of antigen gave significant stimulation. Maximum responses were obtained with 2 × 105 cells and about 100 µg/ml of antigen; dinitrophenylated-ovalbumin (DNP5OVA), in a series of 10 experiments under these optimal conditions, gave a mean incorporation of 70,900 cpm while the controls cultured without antigen showed only 3,600 cpm. PETLES from nonimmunized mice or from mice immunized to other antigens did not respond to DNP5OVA although they did respond to mitogens. The antigen-induced proliferation was shown to require the presence of immune T lymphocytes by two criteria: elimination of the response by treatment with anti-Thy 1.2 serum plus complement and failure to reconstitute the response when the few remaining immune B lymphocytes left after anti-Thy 1.2 treatment were added to nonimmune T lymphocytes. In addition, the system exhibited carrier specificity. Because of the paucity of B lymphocytes in the population, their contribution to the overall magnitude of the proliferative response was negligible as demonstrated by the small response to B cell mitogens. Thus, the assay appears to be a quantitative as well as a qualitative assay for one aspect of T lymphocyte function. This technique should prove useful for the study of murine T lymphocytes in vitro." @default.
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- W4313310136 date "1975-11-01" @default.
- W4313310136 modified "2023-10-05" @default.
- W4313310136 title "T Lymphocyte-Enriched Murine Peritoneal Exudate Cells" @default.
- W4313310136 doi "https://doi.org/10.4049/jimmunol.115.5.1330" @default.
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