Abstract:
:Fc-gamma receptor III (Fc gamma RIII, CD16) type A is expressed on natural killer cells, on a small subset of peripheral blood monocytes and on mature macrophages. Along with differentiation into macrophages, monocytes will express Fc gamma RIII when cultured with transforming growth factor-beta (TGF-beta). In view of the involvement of granulocyte-macrophage colony-stimulating factor (GM-CSF) in myeloid cell differentiation, we investigated the effect of this cytokine on Fc gamma RIII expression in cultures of peripheral blood monocytes. GM-CSF antagonized TGF-beta-induced expression of Fc gamma RIII on monocytes in vitro in a dose-dependent way. The effect of GM-CSF persisted in cultures until at least day 7. The suppression was at the mRNA level, as shown by Northern analyses with a CD16 specific probe, and the signalling pathway involved tyrosine kinase activity. Interferon-gamma and interleukin-2 had no effect on the induced expression of Fc gamma RIII by TGF-beta, while interleukin-4, similar to GM-CSF, antagonized this induction. Our findings suggest that regulatory cytokine networks can drive monocytes into different effector functions and differentiation pathways.
journal_name
Immunologyjournal_title
Immunologyauthors
Kruger M,Coorevits L,De Wit TP,Casteels-Van Daele M,Van De Winkel JG,Ceuppens JLsubject
Has Abstractpub_date
1996-01-01 00:00:00pages
162-7issue
1eissn
0019-2805issn
1365-2567journal_volume
87pub_type
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