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

Identity between human interferon-gamma and "macrophage-activating factor" produced by human T lymphocytes.

Human peripheral blood monocytes purified by counterflow elutriation were activated in vitro by human natural or recombinant interferon-gamma (IFN-gamma) as shown by enhanced killing of Listeria monocytogenes and increased production of H2O2 in response to phorbol myristate acetate. Half-maximal stimulation for macrophage activation ( MAF) was observed with 10-20 antiviral U/ml of purified recombinant IFN-gamma. These MAF activities were found to correlate with the antiviral activity dependent on IFN-gamma under several experimental conditions. Both activities were recovered together from supernatants of concanavalin A-stimulated peripheral blood mononuclear cells and in the media of a large number of T cell clones of different specificities. The parallelism between the two activities was also observed upon fractionation of culture media from producing cells and upon treatment of such preparations with low pH and high temperature. Finally, three antibodies with different specificities were found to abrogate the MAF and antiviral activities from lymphocyte culture supernatant. These results indicate that MAF released by stimulated lymphocytes is identical to IFN-gamma.[1]

References

  1. Identity between human interferon-gamma and "macrophage-activating factor" produced by human T lymphocytes. Talmadge, K.W., Gallati, H., Sinigaglia, F., Walz, A., Garotta, G. Eur. J. Immunol. (1986) [Pubmed]
 
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