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. 1971 Nov;4(5):581–588. doi: 10.1128/iai.4.5.581-588.1971

Enhancement of Phagocytosis by Interferon-Containing Preparations

Kun-Yen Huang 1,2,1, Robert M Donahoe 1,2,2, Francis B Gordon 1,2, Harry R Dressler 1,2
PMCID: PMC416356  PMID: 4343410

Abstract

Exposure of mononuclear cells from the mouse peritoneal cavity to interferon (IF)-containing mouse sera enhanced phagocytosis of colloidal carbon particles by the cells. The same effect was observed when the cells were exposed to IF-containing cell culture harvest free of serum. The magnitude of this effect of IF-containing preparations paralleled the titer of IF and was not related to the dilution of various IF-containing serum specimens tested. The factor responsible for the enhancing effect was stable at pH 2, inactivated by trypsin, and nonsedimentable at 105,000 × g. Heating at 60 C for 1 hr destroyed it, and its kinetics of heat inactivation paralleled that of the antiviral activity of IF. A period of incubation of phagocytic cells with IF-containing serum was necessary before a maximum level of enhancement was reached, and once established was not removable by repeated washing of cells. The kinetics of the production of the enhancing factor in mice injected with Newcastle disease virus was essentially identical to that of the simultaneous production of IF as measured by antiviral activity. Contrary to the effect of mouse IF preparations, human IF preparation did not enhance the activity of mouse phagocytes. It appears, therefore, that the phagocytosis-enhancing factor falls within the present definition of IF.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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