Eosinophils in chronic urticaria: supporting or leading actors?

Area of Science:

• Immunology
• Dermatology
• Hematology

Background:

• Eosinophils are typically disregarded in chronic urticaria pathogenesis due to a lack of peripheral eosinophilia.
• Recent findings indicate activated eosinophils may contribute to chronic urticaria.
• These cells are implicated in activating the tissue factor pathway of coagulation and producing vascular endothelial growth factor.

Purpose of the Study:

• To re-evaluate the role of eosinophils in the pathogenesis of chronic urticaria.
• To discuss recent observations linking eosinophils to coagulation and growth factor production in this condition.

Main Methods:

• Literature review and re-discussion of existing data.
• Analysis of recent findings on eosinophil activation in chronic urticaria.

Main Results:

• Activated eosinophils may trigger the tissue factor pathway of coagulation.
• Eosinophils can be a source of vascular endothelial growth factor.
• These effects appear more significant in patients with severe chronic urticaria.

Conclusions:

• Eosinophils warrant further investigation for their role in chronic urticaria.
• Activated eosinophils may be significant contributors to disease severity and pathogenesis.
• Future research should focus on the specific mechanisms involving eosinophils in chronic urticaria.