Elevated serum total IgE--a potential marker for severe chronic urticaria.

Area of Science:

• Immunology
• Dermatology
• Allergy Research

Background:

• Elevated immunoglobulin E (IgE) levels have been previously observed in chronic urticaria (CU) patients, but their clinical significance remains underappreciated.
• Chronic urticaria is a common dermatological condition characterized by the spontaneous appearance of wheals and angioedema.
• Understanding factors associated with CU severity is crucial for effective patient management.

Purpose of the Study:

• To quantify serum total IgE levels in patients diagnosed with chronic urticaria.
• To investigate the correlation between elevated IgE levels and key clinical parameters in CU.
• To explore associations with urticarial severity, autologous serum skin test (ASST) status, anti-thyroid antibodies, and disease duration.

Main Methods:

• Serum total IgE levels were measured in 203 patients with chronic urticaria and compared to 81 nonatopic healthy controls.
• Patients were clinically assessed for urticarial severity (mild, moderate, severe).
• Autologous serum skin test (ASST) and anti-thyroid antibodies were evaluated in the patient cohort.

Main Results:

• A significantly higher prevalence of elevated total IgE levels (≥175 U/ml) was observed in CU patients (34%) compared to controls (8.6%, p < 0.001).
• Elevated IgE levels strongly correlated with moderate-to-severe chronic urticaria (93% of patients with high IgE) versus normal IgE (69%, p < 0.0001).
• Increased total IgE was significantly associated with positive ASST (36%), positive anti-thyroid antibodies (15%), and longer disease duration (>25 months).

Conclusions:

• Total serum IgE levels are frequently elevated in individuals suffering from chronic urticaria.
• Elevated IgE levels in CU patients are significantly associated with increased disease severity and longer duration.
• These findings underscore the potential role of IgE in the pathophysiology and clinical presentation of chronic urticaria.