Article ; Online: Critical Signaling Events in the Mechanoactivation of Human Mast Cells through p.C492Y-ADGRE2.
The Journal of investigative dermatology
2020 Volume 140, Issue 11, Page(s) 2210–2220.e5
Abstract: ... by the finding of a missense substitution (p.C492Y) associated with familial vibratory urticaria ... In these patients, friction of the skin induces mast cell hyper-degranulation through p.C492Y-ADGRE2, causing ... signals elicited by mechanical activation in human mast cells expressing p.C492Y-ADGRE2 and attached ...
Abstract | A role for the adhesion G-protein coupled receptor ADGRE2 or EMR2 in mechanosensing was revealed by the finding of a missense substitution (p.C492Y) associated with familial vibratory urticaria. In these patients, friction of the skin induces mast cell hyper-degranulation through p.C492Y-ADGRE2, causing localized hives, flushing, and hypotension. We have now characterized the responses and intracellular signals elicited by mechanical activation in human mast cells expressing p.C492Y-ADGRE2 and attached to dermatan sulfate, a ligand for ADGRE2. The presence of p.C492Y-ADGRE2 reduced the threshold to activation and increased the extent of degranulation along with the percentage of mast cells responding. Vibration caused phospholipase C activation, transient increases in cytosolic calcium, and downstream activation of phosphoinositide 3-kinase and extracellular signal-regulated kinases 1 and 2 by Gβγ, Gα |
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MeSH term(s) | Calcium/metabolism ; Cell Degranulation ; Cells, Cultured ; Extracellular Signal-Regulated MAP Kinases/physiology ; Humans ; Mast Cells/physiology ; Mechanotransduction, Cellular ; Mutation, Missense ; Phosphatidylinositol 3-Kinases/physiology ; Prostaglandin D2/physiology ; Protein Kinase C/physiology ; Receptors, G-Protein-Coupled/genetics ; Receptors, G-Protein-Coupled/physiology ; Signal Transduction/physiology ; Tetraspanin 30/physiology ; Type C Phospholipases/physiology ; Urticaria/etiology ; Urticaria/genetics ; Vibration/adverse effects |
Chemical Substances | ADGRE2 protein, human ; CD63 protein, human ; Receptors, G-Protein-Coupled ; Tetraspanin 30 ; Protein Kinase C (EC 2.7.11.13) ; Extracellular Signal-Regulated MAP Kinases (EC 2.7.11.24) ; Type C Phospholipases (EC 3.1.4.-) ; Prostaglandin D2 (RXY07S6CZ2) ; Calcium (SY7Q814VUP) |
Language | English |
Publishing date | 2020-03-25 |
Publishing country | United States |
Document type | Journal Article ; Research Support, N.I.H., Intramural |
ZDB-ID | 80136-7 |
ISSN | 1523-1747 ; 0022-202X |
ISSN (online) | 1523-1747 |
ISSN | 0022-202X |
DOI | 10.1016/j.jid.2020.03.936 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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