Chronic urticaria and autoinflammatory syndromes

Area of Science:

• Immunology
• Dermatology
• Rheumatology

Background:

• Chronic urticaria (CU) is increasingly recognized as a potential early manifestation of autoinflammatory syndromes (AS).
• Innate immune dysregulation, particularly involving interleukin-1 beta (IL-1β), plays a key role in the pathogenesis of CU associated with AS.
• Several autoinflammatory diseases, including cryopyrin-associated periodic syndromes (CAPS), Schnitzler syndrome (SchS), and Still's disease (SD), can present with CU.

Purpose of the Study:

• To provide an updated overview of the association between chronic urticaria and autoinflammatory syndromes.
• To highlight the diagnostic and therapeutic implications of recognizing CU as an initial sign of systemic autoinflammatory disorders.

Main Methods:

• Review of emerging evidence on the link between CU and AS.
• Analysis of pathogenetic mechanisms involving innate immunity and cytokines.
• Evaluation of diagnostic approaches and therapeutic strategies, including IL-1 inhibitors.

Main Results:

• Neutrophilic urticarial dermatosis (NUD) is a recognized histopathological hallmark.
• Early diagnosis of AS in CU patients is crucial for effective management.
• Targeted therapies, especially IL-1 inhibitors, show significant efficacy in controlling inflammation and preventing disease progression.

Conclusions:

• CU refractory to standard treatments, especially with systemic symptoms, warrants investigation for underlying AS.
• A comprehensive diagnostic workup, including clinical, laboratory, histopathological, and genetic assessments, is essential.
• Identifying the autoinflammatory nature of CU enables timely, personalized therapy, improving patient prognosis and reducing long-term morbidity.