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

Interleukin 2 responses of lpr and normal L3T4-/Lyt-2- T cells induced by TPA plus A23187.

The major population of cells that accumulate abnormally in MRL/Mp-lpr/lpr lymphoid tissue is Thy-1+, L3T4-, and Lyt-2-. To clarify the functional potential of these cells, we examined their proliferation, interleukin 2 (IL 2) receptor expression, and IL 2 secretion by using as stimulants the combination of 12-O-tetradecanoylphorbol-2-acetate and A23187 (a calcium ionophore). Although the lpr T cells were capable of responding to these stimulants, the nature of the response and of the concentrations of ligand required differed sharply from the responses of normal adult T cells, and of adult L3T4-Lyt-2- thymocytes. There was a strong similarity but not identity when responses of 16 day fetal thymocytes were compared with those of lpr L3T4-Lyt-2- cells. The unusual functional properties of the lpr cells, such as high A23187 dose requirement for maximal proliferation, low percentage of IL 2 receptor-expressing cells, and low levels of IL 2 secretion, suggested that these cells are arrested at a stage of development similar to that of 16-day fetal thymocytes and before adult L3T4-/Lyt-2- thymocytes.[1]


  1. Interleukin 2 responses of lpr and normal L3T4-/Lyt-2- T cells induced by TPA plus A23187. Katagiri, K., Katagiri, T., Eisenberg, R.A., Ting, J., Cohen, P.L. J. Immunol. (1987) [Pubmed]
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