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

Translation of lymphocyte mRNA into biologically-active Interleukin 2 in oocytes.

A variant line of murine T lymphoma EL4 produces high levels of the lymphokine Interleukin 2 ( IL 2) when it is stimulated with phorbol myristate acetate. We have extracted poly A+ RNA from the stimulated cells and injected it into Xenopus laevis oocytes. The injected oocytes synthesize a material with biologic and biochemical properties of murine IL 2. Namely, it stimulates the continued growth of a cloned, cytotoxic T cell line (the T cell growth factor assay) and it chromatographs on a gel filtration column (G-100) with IL 2 produced by the stimulated EL4 line. The RNA responsible for the biologic activity sediments with markers of 11 to 12S in a sucrose gradient. The IL 2 produced by injected oocytes from a given preparation of mRNA is about 1% of the amount produced by the EL4 cells stimulated originally with phorbol myristate acetate. When RNA is extracted and purified from unstimulated EL4 cells it does not induce IL 2 production in oocytes. We conclude that IL 2 is essentially protein in nature, that the protein is coded for by poly A+ mRNA, and that the amount of this mRNA increases significantly after stimulation of the variant EL4 cells with the inducer phorbol myristate acetate.[1]


  1. Translation of lymphocyte mRNA into biologically-active Interleukin 2 in oocytes. Bleackley, R.C., Caplan, B., Havele, C., Ritzel, R.G., Mosmann, T.R., Farrar, J.J., Paetkau, V. J. Immunol. (1981) [Pubmed]
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