The Role of Sphingosine Kinase in the Signaling Initiated at the High-Affinity Receptor for IgE (FcεRI) in Mast Cells

2000 ◽  
Vol 122 (2) ◽  
pp. 85-90 ◽  
Author(s):  
Thomas Baumruker ◽  
Eva E. Prieschl
Keyword(s):  
Mast Cells ◽  
Sphingosine Kinase ◽  
High Affinity ◽  
High Affinity Receptor ◽  
Affinity Receptor

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 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 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.

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