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. 1992 Jun;88(3):559–562. doi: 10.1111/j.1365-2249.1992.tb06487.x

Serum-induced suppression of interferon (IFN) activity. Lack of evidence for the presence of specific autoantibodies to IFN-alpha in normal human sera.

M B Hansen 1, M Svenson 1, K Bendtzen 1
PMCID: PMC1554525  PMID: 1606741

Abstract

IgG antibodies binding to different IFN species have been described in sera of healthy and diseased individuals. Human serum immunoglobulins have also been shown to interfere with IFN bioactivity. To characterize these antibodies, human recombinant IFN-alpha 2A (rIFN-alpha) was radioiodinated, and ligand binding studies were performed in human sera as well as on the human cell line A-549 in the presence of human serum. 125I-rIFN-alpha bound to serum factors of healthy individuals. However, less than 3% of the binding was to IgG and the binding was non-saturable and therefore most likely non-specific. 125I-rIFN-alpha bound to receptors on A-549 cells, and the ligand-receptor complexes appeared to internalize. However, both cell binding and internalization of 125I-rIFN-alpha were independent of the presence of human serum. We conclude that normal human sera do not contain detectable autoantibodies to rIFN-alpha.

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Selected References

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