Cyclosporin A inhibits the production of gamma interferon (IFN gamma), but does not inhibit production of virus-induced IFN alpha/beta

Cellular Immunology
V K Kalman, G R Klimpel

Abstract

The effect of cyclosporin A (CsA) on the production of gamma interferon (IFN gamma) versus IFN alpha/beta was studied using mouse and human lymphocytes and fibroblasts. Spleen cells from C57Bl/6 mice produced low but significant levels (40-60 U/ml) of IFN gamma after 2 to 3 days of culture with irradiated DBA spleen cells. The addition of CsA at concentrations as low as 0.1 microgram/ml completely inhibited (less than 10 U/ml) IFN gamma production in these cultures. High levels of IFN gamma (170-1200 U/ml) were produced when either C57Bl/6 spleen cells or Ficoll-Hypaque-purified human peripheral blood lymphocytes (PBL) were cultured with the T-cell mitogen staphylococcal enterotoxin A (SEA). The addition of CsA (0.1 microgram/ml) to these cultures also completely inhibited (less than 10 U/ml) IFN gamma production. This inhibition was shown not to be due to a change in the kinetics of IFN gamma production or to a change in the amount of SEA required for stimulation. IFN gamma production in SEA-stimulated mouse spleen cells was inhibited at 3 days of culture even when CsA was added at 24 or 48 hr postculture initiation. Thus, CsA inhibits IFN gamma production even when early events associated with lymphocyte activation have been ...Continue Reading

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