Serum IgE-concentrations in patients with contact sensitization

Area of Science:

• Dermatology
• Immunology
• Allergy

Background:

• Contact sensitization (cs) is a condition affecting skin health.
• Elevated serum IgE levels are often associated with atopic conditions.
• The relationship between contact sensitization and IgE levels requires further investigation.

Purpose of the Study:

• To determine serum IgE concentrations in patients with contact sensitization.
• To explore correlations between IgE levels, atopy history, and skin lesion characteristics.
• To investigate potential mechanisms of IgE activation in contact sensitization.

Main Methods:

• Serum IgE concentrations were measured in 123 patients with contact sensitization (cs).
• A subgroup of 23 patients (csa) with positive atopy history or prick tests was analyzed.
• Histologic examinations using immunofluorescence were performed.
• Comparisons were made with a control group of healthy individuals.

Main Results:

• Contact sensitization patients exhibited a wide range of IgE levels (1-3080 U/ml).
• 12% of cs patients had IgE > 1000 U/ml, irrespective of atopy, liver/kidney disease, or parasitic infestation.
• Mean IgE in cs patients (396 U/ml) was significantly higher than in controls.
• Higher IgE levels correlated with acute, extensive skin lesions compared to chronic, localized ones.
• No significant differences in IgE levels were found related to patient age, allergen type/number, or lesion duration.
• Metal-sensitized patients (csa) predominantly showed localized, subacute to chronic lesions.

Conclusions:

• Contact sensitization can be associated with elevated serum IgE levels, even without typical atopic manifestations.
• The severity and type of skin lesions in contact sensitization may influence IgE levels, possibly due to unspecific activation of IgE-synthesizing cells.
• Specific allergens like metals may be associated with particular lesion types in contact sensitization.