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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Proliferation in vitro and interleukin production by 14 day fetal and adult Lyt-2-/L3T4- mouse thymocytes.

When 14 day fetal mouse thymocytes, which are phenotypically Lyt-2-/L3T4-(2-4-), were stimulated in vitro with a combination of phorbol myristate acetate (PMA) and the calcium ionophore ionomycin, they proliferated without addition of exogenous interleukins and/or growth factors. Addition of exogenous IL 2 resulted in a slight enhancement of fetal thymocyte proliferation. By using factor-dependent indicator cell lines, this proliferation was shown to be accompanied by the production of IL 2 and IL 3. However, phenotypic analysis by using flow microfluorometry and monoclonal antibodies to Lyt-2 and L3T4 showed little differentiation among proliferating 2-4-fetal thymocytes. Interestingly, the in vitro growth of PMA + ionomycin-stimulated fetal thymocytes appeared to be IL 2 dependent in that it was inhibited by a monoclonal antibody to the IL 2 receptor. The results obtained with fetal thymocytes were compared with those obtained when using 2-4- thymocytes from adult mice.[1]


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