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  • Title: Response of murine cell lines to an IL-1/IL-2-induced factor in a rat/mouse T hybridoma (PC60): differential induction of cytokines by human IL-1 alpha and IL-1 beta and partial amino acid sequence of rat GM-CSF.
    Author: Vandenabeele P, Guisez Y, Declercq W, Bauw G, Vandekerckhove J, Fiers W.
    Journal: Lymphokine Res; 1990; 9(3):381-9. PubMed ID: 2204769.
    Abstract:
    We analyzed the proliferative response of the growth factor-dependent murine cell lines FDCp1, DA1-a, 32DC1, Ea3.15, 7TD1, BCL1 and of femural bone marrow cells for their sensitivity to various cytokines, viz. rhIL-1 beta, rhTNF, rhIL-2, mIL-3, rmIL-4, rmIL-5, rhIL-6, rhG-CSF and rmGM-CSF. We also tested for IL-1 and TNF-mediated cytokine secretion by several T cell lines and thymocytes. In all T cell systems, IL-1 alpha and IL-1 beta were equally active in the induction of cytokine production, except for the rat/mouse T cell hybridoma PC60. This cell line exhibited a 10-fold difference in specific activity for the induction of cytokine secretion between rhIL-1 alpha and the other human or murine IL-1 species. Furthermore, IL-1 and IL-2 synergistically induced PC60 cells to produce a factor, which was preferentially active on FDCp1-cells, provisionally called FDCp1-growth factor. SDS-PAGE analysis of partially purified FDCp1-GF showed 19 kDa and 24 kDa-associated biological activities. Amino-terminal and internal amino acid sequences of both bands were determined and on this basis, we identified FDCp1-GF as rat GM-CSF.
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