Pathogenesis of chronic urticaria: an overview

Area of Science:

• Immunology
• Dermatology
• Pathophysiology

Background:

• Chronic urticaria (CU) pathogenesis remains poorly understood, with current treatments being palliative.
• Mast cell activation is a central, established event in CU pathophysiology.
• Autoimmune factors and other hypotheses like basophil alterations and coagulation pathway activation are also considered.

Purpose of the Study:

• To explore the complex and interconnected pathomechanisms underlying chronic urticaria.
• To highlight the emerging understanding of CU as an immune-mediated inflammatory disorder.
• To provide insights for developing targeted immunomodulatory treatments for refractory CU.

Main Methods:

• Review of established and emerging pathophysiological concepts in chronic urticaria.
• Analysis of the roles of mast cells, basophils, coagulation, and immune dysregulation.
• Synthesis of current knowledge on cytokine-chemokine networks and innate immunity in CU.

Main Results:

• Mast cell degranulation is key, but other factors like basophil changes and coagulation abnormalities are implicated.
• Chronic urticaria is increasingly recognized as an immune-mediated disorder linked to immune dysregulation.
• Multiple pathomechanisms likely interact synergistically or sequentially.

Conclusions:

• The pathogenesis of chronic urticaria is multifactorial and involves interconnected immune pathways.
• Further understanding of these complex mechanisms is crucial for advancing treatment strategies.
• Targeted immunomodulators and biological therapies hold promise for severe, refractory chronic urticaria.