Evaluation of the inhibitory effect of different molecular weights chitosan on MRGPRX2-mediated mast cell degranulation and the pseudo-allergic reaction.
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引用次数: 0
Abstract
Objectives: Chitosan is widely used in medicine to regulate immune responses in T cells and dendritic cells. However, research on the regulation of mast cells (MCs) is scarce. Mas-related G-protein-coupled receptor X2 (MRGPRX2) is a key receptor that mediates MC activation. However, the inhibitory effects of chitosan on MRGPRX2 activation have not yet been reported. The aim of this study was to determine whether chitosan inhibits MRGPRX2-mediated MC activation and the molecular weight of chitosan with the best inhibitory effect.
Methods: Cytotoxic and activating effects of chitosan on LAD2 cells were evaluated in vitro. An in vitro MC degranulation reaction model and in vivo C48/80-induced local passive anaphylaxis mouse model were used to evaluate the inhibitory effect of chitosan on MRGPRX2 activation.
Key findings: Chitosan inhibited MC degranulation mediated by MRGPRX2 in vitro and reduced histamine, β-hexosaminidase, and cytokine release. Chitosan inhibited local pseudo-allergy and inflammatory mediator release by inhibiting MRGPRX2-mediated MC activation. Moreover, low-molecular-weight chitosan exhibited superior inhibitory activity against MRGPRX2.
Conclusions: Chitosan inhibited MRGPRX2-mediated MC degranulation in vivo and in vitro. Low molecular weight chitosan has the potential to be developed as a functional drug or food to assist in the treatment of MRGPRX2-regulated diseases.
期刊介绍：
The journal Immunopharmacology and Immunotoxicology is devoted to pre-clinical and clinical drug discovery and development targeting the immune system. Research related to the immunoregulatory effects of various compounds, including small-molecule drugs and biologics, on immunocompetent cells and immune responses, as well as the immunotoxicity exerted by xenobiotics and drugs. Only research that describe the mechanisms of specific compounds (not extracts) is of interest to the journal.
The journal will prioritise preclinical and clinical studies on immunotherapy of disorders such as chronic inflammation, allergy, autoimmunity, cancer etc. The effects of small-drugs, vaccines and biologics against central immunological targets as well as cell-based therapy, including dendritic cell therapy, T cell adoptive transfer and stem cell therapy, are topics of particular interest. Publications pointing towards potential new drug targets within the immune system or novel technology for immunopharmacological drug development are also welcome.
With an immunoscience focus on drug development, immunotherapy and toxicology, the journal will cover areas such as infection, allergy, inflammation, tumor immunology, degenerative disorders, immunodeficiencies, neurology, atherosclerosis and more.
Immunopharmacology and Immunotoxicology will accept original manuscripts, brief communications, commentaries, mini-reviews, reviews, clinical trials and clinical cases, on the condition that the results reported are based on original, clinical, or basic research that has not been published elsewhere in any journal in any language (except in abstract form relating to paper communicated to scientific meetings and symposiums).
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