IgE stabilizes its high affinity receptor (FcεRI) on mast cells in vitro and ex vivo: The mechanism of IgE-mediated FcεRI up-regulation and its physiological meaning

2001 ◽  
pp. 183-188
Author(s):  
S. Kubo ◽  
K. Matsuoka ◽  
C. Taya ◽  
F. Kitamura ◽  
H. Yonekawa ◽  
...  
Keyword(s):  
Mast Cells ◽  
Ex Vivo ◽  
High Affinity ◽  
High Affinity Receptor ◽  
Ige Mediated ◽  
Affinity Receptor

scholarly journals Mast cells and mastocytosis

Blood ◽  
2008 ◽  
Vol 112 (4) ◽  
pp. 946-956 ◽  
Author(s):  
Dean D. Metcalfe
Keyword(s):  
Mast Cells ◽  
Kinase Inhibitors ◽  
Allergic Inflammation ◽  
Host Responses ◽  
High Affinity ◽  
Human Mast Cells ◽  
Proinflammatory Mediators ◽  
High Affinity Receptor ◽  
Ige Mediated ◽  
Affinity Receptor

Abstract Mast cells have been recognized for well over 100 years. With time, human mast cells have been documented to originate from CD34+ cells, and have been implicated in host responses in both innate and acquired immunity. In clinical immunology, they are recognized for their central role in IgE-mediated degranulation and allergic inflammation by virtue of their expression of the high-affinity receptor for IgE and release of potent proinflammatory mediators. In hematology, the clinical disease of mastocytosis is characterized by a pathologic increase of mast cells in tissues, often associated with mutations in KIT, the receptor for stem cell factor. More recently, and with increased understanding of how human mast cells are activated through receptors including the high-affinity receptor for IgE and KIT, specific tyrosine kinase inhibitors have been identified with the potential to interrupt signaling pathways and thus limit the proliferation of mast cells as well as their activation through immunoglobulin receptors.

scholarly journals IL-33 and Superantigenic Activation of Human Lung Mast Cells Induce the Release of Angiogenic and Lymphangiogenic Factors

Cells ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 145
Author(s):  
Leonardo Cristinziano ◽  
Remo Poto ◽  
Gjada Criscuolo ◽  
Anne Lise Ferrara ◽  
Maria Rosaria Galdiero ◽  
...  
Keyword(s):  
Mast Cells ◽  
Human Lung ◽  
Protein A ◽  
Protein L ◽  
Variable Regions ◽  
Prolonged Incubation ◽  
High Affinity ◽  
High Affinity Receptor ◽  
Affinity Receptor ◽  
Pleiotropic Functions

Human lung mast cells (HLMCs) express the high-affinity receptor FcεRI for IgE and are strategically located in different compartments of human lung, where they play a role in several inflammatory disorders and cancer. Immunoglobulin superantigens (e.g., protein A of Staphylococcus aureus and protein L of Peptostreptococcus magnus) bind to the variable regions of either the heavy (VH3) or light chain (κ) of IgE. IL-33 is a cytokine expressed by epithelial cells that exerts pleiotropic functions in the lung. The present study investigated whether immunoglobulin superantigens protein A and protein L and IL-33 caused the release of inflammatory (histamine), angiogenic (VEGF-A) and lymphangiogenic (VEGF-C) factors from HLMCs. The results show that protein A and protein L induced the rapid (30 min) release of preformed histamine from HLMCs. By contrast, IL-33 did not induce the release of histamine from lung mast cells. Prolonged incubation (12 h) of HLMCs with superantigens and IL-33 induced the release of VEGF-A and VEGF-C. Preincubation with IL-33 potentiated the superantigenic release of histamine, angiogenic and lymphangiogenic factors from HLMCs. Our results suggest that IL-33 might enhance the inflammatory, angiogenic and lymphangiogenic activities of lung mast cells in pulmonary disorders.

scholarly journals Neutrophils express the high affinity receptor for IgG (Fc gamma RI, CD64) after in vivo application of recombinant human granulocyte colony- stimulating factor

Blood ◽  
1991 ◽  
Vol 78 (4) ◽  
pp. 885-889 ◽  
Author(s):  
R Repp ◽  
T Valerius ◽  
A Sendler ◽  
M Gramatzki ◽  
H Iro ◽  
...  
Keyword(s):  
Fc Receptors ◽  
Granulocyte Colony Stimulating Factor ◽  
Colony Stimulating Factor ◽  
High Affinity ◽  
Healthy Donors ◽  
High Affinity Receptor ◽  
Affinity Receptor ◽  
Stimulating Factor

Abstract Fc receptors are important effector molecules of neutrophilic granulocytes (polymorphonuclear neutrophils [PMN]), connecting phagocytic cells and the specific immune response. Neutrophils from healthy donors express the low-affinity receptors for IgG Fc gamma RII (CD32) and Fc gamma RIII (CD16), but not the high-affinity receptor Fc gamma RI (CD64). The latter has been found on neutrophils from patients with certain bacterial infections and can be induced in vitro after incubation with interferon-gamma. We show here that neutrophils strongly express Fc gamma RI after in vivo application of recombinant human granulocyte colony-stimulating factor (rhG-CSF). PMN from patients receiving rhG-CSF displayed higher cytotoxicity against Daudi lymphoma cells in vitro compared with control patients and with healthy donors. Fab fragments against Fc gamma RII (monoclonal antibody [MoAb] IV.3) inhibited neutrophil-mediated cytotoxicity of healthy donors but not of patients during rhG-CSF therapy. Therefore, expression of Fc receptors by PMN was investigated by flow cytometry and the mean fluorescence intensity (MFI) was compared. After staining with MoAb 32.2 against Fc gamma RL, the median MFI of neutrophils from G-CSF patients (median, 4.78; range, 2.40 to 8.50; n = 5) was significantly higher (P = .002 and P = .001, respectively) than the median MFI of patients not receiving G-CSF (median, 1.23; range, 1.01 to 1.58; n = 6) and the median MFI of healthy donors (median, 1.04; range, 0.67 to 1.12; n = 6). Fc gamma RI disappeared after the discontinuing of the G- CSF injections, but was reinduced during the next treatment cycle with rhG-CSF. The high expression of Fc gamma RI during rhG-CSF therapy correlated with enhanced cytotoxicity. In vitro incubation with rhG-CSF also enhances cytotoxicity, but only minor increments in Fc gamma RI expression were observed. Thus, during in vivo application of rhG-CSF neutrophils acquire an additional potent receptor for mediating tumor cell killing in vitro by induction of the high-affinity receptor for IgG (Fc gamma RI, CD64).

scholarly journals CD84 Negatively Regulates IgE High-Affinity Receptor Signaling in Human Mast Cells

2011 ◽  
Vol 187 (11) ◽  
pp. 5577-5586 ◽  
Author(s):  
Damiana Álvarez-Errico ◽  
Irene Oliver-Vila ◽  
Erola Ainsua-Enrich ◽  
Alasdair M. Gilfillan ◽  
César Picado ◽  
...  
Keyword(s):  
Mast Cells ◽  
Receptor Signaling ◽  
High Affinity ◽  
Human Mast Cells ◽  
High Affinity Receptor ◽  
Affinity Receptor

scholarly journals Evolutionary background of allergic reactivity: mast cells, FcεRI, IgE - three components of the effector phase of the allergic response

2018 ◽  
Vol 15 (4) ◽  
pp. 5-16
Author(s):  
I S Gushchin
Keyword(s):  
Mast Cells ◽  
Immunoglobulin E ◽  
The Body ◽  
Allergic Response ◽  
Effector Phase ◽  
Time Regime ◽  
High Affinity Receptor ◽  
Ige Mediated ◽  
Affinity Receptor ◽  
Elimination Function

The literature data on the evolution of the main obligatory participants in the effector phase of the IgE-mediated allergic response are presented: mast cells/basophils, immunoglobulin E, and high affinity receptor for the Fcε fragment (FcεRI). Allergic reactivity is considered as the most recent evolutionary immunologically-mediated acquisition of mammals. It is aimed at recognizing small amounts of allergen entering the body in a certain time regime, and organizing an allergen-specific inflammation that carries features of elimination function. The most biologically justified way to prevent allergies is to restore the function of barrier systems and, accordingly, to prevent the need to develop an allergic response.

Sign in / Sign up

Export Citation Format

Share Document