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Mast Cells at the Crossroads of Hypersensitivity Reactions and Neurogenic Inflammation
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Mast Cells at the Crossroads of Hypersensitivity Reactions and Neurogenic Inflammation
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Journal Article
Mast Cells at the Crossroads of Hypersensitivity Reactions and Neurogenic Inflammation
2025
Overview
Although mast cells have long been known, they are not yet fully understood. They are traditionally recognized for their role in allergic reactions through the IgE/FcεRI axis, but different groups of surface receptors have since been characterized, which appear to be involved in the manifestation of peculiar clinical features. In particular, MRGPRX2 has emerged as a crucial receptor involved in degranulating human skin mast cells. Because of mast cells’ close proximity to peripheral nerve endings, it may play a key role in neuroimmune interactions. This paper provides an overview of mast cell contributions to hypersensitivity and so-called “pseudoallergic” reactions, as well as an update on neuroinflammatory implications in the main models of airway and skin allergic diseases. In particular, the main cellular characteristics and the most relevant surface receptors involved in MC pathophysiology have been reappraised in light of recent advancements in MC research. Molecular and clinical aspects related to MC degranulation induced by IgE or MRGPRX2 have been analyzed and compared, along with their possible repercussions and limitations on future therapeutic perspectives.
Publisher
MDPI AG,MDPI
Subject
/ Animals
/ Antigens
/ Enzymes
/ Humans
/ Hypersensitivity - immunology
/ Hypersensitivity - metabolism
/ Hypersensitivity - pathology
/ Immunoglobulin E - immunology
/ Immunoglobulin E - metabolism
/ Nerve Tissue Proteins - metabolism
/ Neurogenic Inflammation - immunology
/ Neurogenic Inflammation - metabolism
/ Neurogenic Inflammation - pathology
/ Proteins
/ Receptors, G-Protein-Coupled - metabolism
/ Receptors, Neuropeptide - metabolism
/ Review
/ Skin
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