TY - JOUR
T1 - Lactoferrin down-modulates the activity of the granulocyte macrophage colony-stimulating factor promoter in interleukin-1β-stimulated cells
AU - Penco, S.
AU - Pastorino, S.
AU - Bianchi-Scarra, G.
AU - Garre, C.
PY - 1995
Y1 - 1995
N2 - The human neutrophil lactoferrin (Lf), a cationic iron-binding glycoprotein, has an inhibitor role on granulocyte macrophage colony- stimulating factor (GM-CSF) production via interleukin-1 (IL-1). The nuclear localization of Lf suggests that it may be involved in the transcriptional regulation of GM-CSF gene expression. To explore this possibility, the effect of Lf on GM-CSF gene expression was investigated in various cell lines and in primary cultures of fibroblasts. Down-regulation of GM-CSF mRNA level was observed in Lf-transfected embryonic fibroblasts induced to produce GM-CSF by IL-1β. In 5637 cell-line and in embryonic fibroblasts, co-transfection experiments, in which an Lf expression vector was used together with a vector carrying a reporter gene linked to the GM-CSF promoter, revealed that Lf reduces the activity of the GM-CSF promoter. This effect is marked in IL- 1β-stimulated cells. These findings suggest that Lf plays a negative role in GM-CSF expression at the transcriptional level, perhaps through the mediation of IL-1β.
AB - The human neutrophil lactoferrin (Lf), a cationic iron-binding glycoprotein, has an inhibitor role on granulocyte macrophage colony- stimulating factor (GM-CSF) production via interleukin-1 (IL-1). The nuclear localization of Lf suggests that it may be involved in the transcriptional regulation of GM-CSF gene expression. To explore this possibility, the effect of Lf on GM-CSF gene expression was investigated in various cell lines and in primary cultures of fibroblasts. Down-regulation of GM-CSF mRNA level was observed in Lf-transfected embryonic fibroblasts induced to produce GM-CSF by IL-1β. In 5637 cell-line and in embryonic fibroblasts, co-transfection experiments, in which an Lf expression vector was used together with a vector carrying a reporter gene linked to the GM-CSF promoter, revealed that Lf reduces the activity of the GM-CSF promoter. This effect is marked in IL- 1β-stimulated cells. These findings suggest that Lf plays a negative role in GM-CSF expression at the transcriptional level, perhaps through the mediation of IL-1β.
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U2 - 10.1074/jbc.270.20.12263
DO - 10.1074/jbc.270.20.12263
M3 - Article
C2 - 7744878
AN - SCOPUS:0029012726
VL - 270
SP - 12263
EP - 12268
JO - Journal of Biological Chemistry
JF - Journal of Biological Chemistry
SN - 0021-9258
IS - 20
ER -