Neuro-Immuno-Psychological Aspects of Chronic Urticaria.

Urticaria is a condition characterized by the development of itchy wheals (hives), angioedema, or both. The pathophysiology of chronic spontaneous urticaria (CSU) is still poorly understood. It is suggested that there is no dominant and independent mechanism of CSU; however, there are different immunological and non-immunological abnormalities that act simultaneously or/and follow each other resulting in clinical symptoms.

IgE by itself affects mature rat mast cell preformed and de novo-synthesized mediator release and amplifies mast cell migratory response.

Background: Immunoglobulin E (IgE) binds to high affinity receptor FcεRI numerously expressed on mast cells. Recent findings have revealed that IgE by itself may regulate various aspects of mast cell biology, however, detailed data is still limited.

Methodology/findings: Here, we have examined the influence of IgE alone, used at different concentrations, on mast cell activity and releasability.

[Bacteria and viruses modulate FcεRI-dependent mast cell activity].

Undoubtedly, mast cells play a central role in allergic processes. Specific allergen cross-linking of IgE bound to the high affinity receptors (FcεRI) on the mast cell surface leads to the release of preformed mediators and newly synthesized mediators, i.e.