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. 1987 Feb;60(2):167–172.

Effect of interferons on the inhibition of human natural killers by primary monolayer cell cultures.

M Heiskala
PMCID: PMC1453230  PMID: 2434416

Abstract

Natural killer (NK) activity is inhibited by the contact of peripheral blood lymphocytes with primary monolayer cell cultures of both benign and malignant origin. In this study the effect of interferons (IFNs) on the inhibition has been analysed. Both alpha IFN- and gamma IFN-pretreated peripheral blood lymphocytes are effectively inhibited by monolayer target cells. IFN treatment of lymphocytes does not change cytotoxicity against the inhibitory target cells, although it enhances reactivity against NK-sensitive target cells. Treatment of monolayer cells with interferons significantly reduces their inhibitory capacity. However, diminished inhibition of NK activity by the IFN-treated target cells is not associated with increased lysis, probably due to their decreased sensitivity to natural killer cytotoxic factors (NKCF). In 18.5% of the cases studied, monolayer target cells induced endogenous IFN production in lymphocytes. In these cases no inhibition of the NK activity of the effector cells was seen. According to the results of this paper, IFNs have a dual effect on the NK regulatory system: they enhance the NK activity of the effector cells against NK-sensitive target cells, and they change the NK resistant target cells in a way that makes them less inhibitory to NK activity but simultaneously more resistant to the toxic factors secreted by NK cells.

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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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