Abstract
p40/LAIR-1, a member of the immunoglobulin superfamily, is a surface molecule broadly distributed among leukocytes which has been shown to down-regulate T and NK cell activation. In this study, we show that p40/LAIR-1 is highly expressed in CD14+ peripheral blood mononuclear cells (PBMC). When cultured in the presence of granulocyte-macrophage colony-stimulating factor (GM-CSF) for 10-14 days, CD14+ cells acquired morphologic and phenotypic features (i.e. loss of CD14 and expression of CD80(bright) and CD86(bright)) typical of dendritic cells (DC) and lost the expression of p40/LAIR-1. Engagement of p40/LAIR-1 (but not of CD58) by specific monoclonal antibodies prevented CD14+ PBMC differentiation into DC; when cultured in the presence of GM-CSF upon p40/LAIR-1 cross-linking, the resulting cells were CD14+ CD80(dull) CD86(dull) and displayed a macrophage-like morphology. We have recently demonstrated that peripheral blood CD14+ cells co-expressing the CD34 progenitor marker represent the circulating precursors of CD83+ DC. Herein we show that cross-linking of p40/LAIR-1 prevented the maturation of CD14+CD34+ cells into CD83+ DC. This effect appears to be consequent to the impairment of GM-CSF receptor-mediated activation signaling. Indeed, triggering of GM-CSF receptors in both CD14+ and CD14+CD34+ cells led to increases in the intracellular free calcium concentrations which were inhibited by p40/LAIR-1 engagement. Taken together, these data suggest a possible regulating role played by p40/LAIR-1 in the process of differentiation from peripheral blood precursors into DC induced by GM-CSF.
| Original language | English |
|---|---|
| Pages (from-to) | 2086-2091 |
| Number of pages | 6 |
| Journal | European Journal of Immunology |
| Volume | 28 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Jul 1998 |
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Keywords
- Calcium
- Dendritic cell
- Differentiation
- Granulocyte-macrophage colony-stimulating factor receptor
- LAIR-1
ASJC Scopus subject areas
- Immunology
Cite this
p40/LAIR-1 regulates the differentiation of peripheral blood precursors to dendritic cells induced by granulocyte-monocyte colony-stimulating factor. / Poggi, Alessandro; Tomasello, Elena; Ferrero, Elisabetta; Zocchi, Maria Raffaella; Moretta, Lorenzo.
In: European Journal of Immunology, Vol. 28, No. 7, 07.1998, p. 2086-2091.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - p40/LAIR-1 regulates the differentiation of peripheral blood precursors to dendritic cells induced by granulocyte-monocyte colony-stimulating factor
AU - Poggi, Alessandro
AU - Tomasello, Elena
AU - Ferrero, Elisabetta
AU - Zocchi, Maria Raffaella
AU - Moretta, Lorenzo
PY - 1998/7
Y1 - 1998/7
N2 - p40/LAIR-1, a member of the immunoglobulin superfamily, is a surface molecule broadly distributed among leukocytes which has been shown to down-regulate T and NK cell activation. In this study, we show that p40/LAIR-1 is highly expressed in CD14+ peripheral blood mononuclear cells (PBMC). When cultured in the presence of granulocyte-macrophage colony-stimulating factor (GM-CSF) for 10-14 days, CD14+ cells acquired morphologic and phenotypic features (i.e. loss of CD14 and expression of CD80(bright) and CD86(bright)) typical of dendritic cells (DC) and lost the expression of p40/LAIR-1. Engagement of p40/LAIR-1 (but not of CD58) by specific monoclonal antibodies prevented CD14+ PBMC differentiation into DC; when cultured in the presence of GM-CSF upon p40/LAIR-1 cross-linking, the resulting cells were CD14+ CD80(dull) CD86(dull) and displayed a macrophage-like morphology. We have recently demonstrated that peripheral blood CD14+ cells co-expressing the CD34 progenitor marker represent the circulating precursors of CD83+ DC. Herein we show that cross-linking of p40/LAIR-1 prevented the maturation of CD14+CD34+ cells into CD83+ DC. This effect appears to be consequent to the impairment of GM-CSF receptor-mediated activation signaling. Indeed, triggering of GM-CSF receptors in both CD14+ and CD14+CD34+ cells led to increases in the intracellular free calcium concentrations which were inhibited by p40/LAIR-1 engagement. Taken together, these data suggest a possible regulating role played by p40/LAIR-1 in the process of differentiation from peripheral blood precursors into DC induced by GM-CSF.
AB - p40/LAIR-1, a member of the immunoglobulin superfamily, is a surface molecule broadly distributed among leukocytes which has been shown to down-regulate T and NK cell activation. In this study, we show that p40/LAIR-1 is highly expressed in CD14+ peripheral blood mononuclear cells (PBMC). When cultured in the presence of granulocyte-macrophage colony-stimulating factor (GM-CSF) for 10-14 days, CD14+ cells acquired morphologic and phenotypic features (i.e. loss of CD14 and expression of CD80(bright) and CD86(bright)) typical of dendritic cells (DC) and lost the expression of p40/LAIR-1. Engagement of p40/LAIR-1 (but not of CD58) by specific monoclonal antibodies prevented CD14+ PBMC differentiation into DC; when cultured in the presence of GM-CSF upon p40/LAIR-1 cross-linking, the resulting cells were CD14+ CD80(dull) CD86(dull) and displayed a macrophage-like morphology. We have recently demonstrated that peripheral blood CD14+ cells co-expressing the CD34 progenitor marker represent the circulating precursors of CD83+ DC. Herein we show that cross-linking of p40/LAIR-1 prevented the maturation of CD14+CD34+ cells into CD83+ DC. This effect appears to be consequent to the impairment of GM-CSF receptor-mediated activation signaling. Indeed, triggering of GM-CSF receptors in both CD14+ and CD14+CD34+ cells led to increases in the intracellular free calcium concentrations which were inhibited by p40/LAIR-1 engagement. Taken together, these data suggest a possible regulating role played by p40/LAIR-1 in the process of differentiation from peripheral blood precursors into DC induced by GM-CSF.
KW - Calcium
KW - Dendritic cell
KW - Differentiation
KW - Granulocyte-macrophage colony-stimulating factor receptor
KW - LAIR-1
UR - http://www.scopus.com/inward/record.url?scp=0031874021&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0031874021&partnerID=8YFLogxK
U2 - 10.1002/(SICI)1521-4141(199807)28:07<2086::AID-IMMU2086>3.0.CO;2-T
DO - 10.1002/(SICI)1521-4141(199807)28:07<2086::AID-IMMU2086>3.0.CO;2-T
M3 - Article
C2 - 9692876
AN - SCOPUS:0031874021
VL - 28
SP - 2086
EP - 2091
JO - European Journal of Immunology
JF - European Journal of Immunology
SN - 0014-2980
IS - 7
ER -