Quercetin and Resveratrol Differentially Decrease Expression of the High-Affinity IgE Receptor (FcεRI) by Human and...

Area of Science:

• Immunology
• Pharmacology

Background:

• Mast cells (MC) are key players in atopic diseases, releasing inflammatory mediators.
• Plant-derived compounds quercetin and resveratrol exhibit anti-inflammatory properties.
• The precise mechanisms by which these compounds inhibit MC activation are not fully understood.

Purpose of the Study:

• To compare the effects of quercetin and resveratrol on human (LAD2) and mouse (MC/9, BMMC) mast cells.
• To investigate their impact on mediator release, receptor expression, and FcεRI signaling.
• To elucidate the mechanisms underlying their inhibitory effects on mast cell activation.

Main Methods:

• Comparative analysis of quercetin and resveratrol effects on human and mouse mast cell lines (LAD2, MC/9, BMMC).
• Assessment of mediator release, FcεRI expression, and downstream signaling pathways (SYK, ERK phosphorylation).
• Evaluation of cell viability following compound treatment.

Main Results:

• Quercetin reduced FcεRI expression in mouse mast cells (BMMC, MC/9), but decreased viability in MC/9.
• Quercetin inhibited TNF release in BMMC.
• Resveratrol inhibited ERK phosphorylation and FcεRI-stimulated degranulation in human LAD2 mast cells.

Conclusions:

• Quercetin and resveratrol exhibit differential inhibitory effects on human and mouse mast cells.
• These effects are linked to alterations in FcεRI expression, signaling pathways, and mediator release.
• Findings contribute to understanding the therapeutic potential of these compounds in atopic conditions.