Serum eosinophilotactic activity in eosinophilic fasciitis

Area of Science:

• Immunology
• Rheumatology
• Dermatology

Background:

• Eosinophilic fasciitis is a rare inflammatory condition.
• The role of eosinophils in eosinophilic fasciitis pathogenesis is not fully understood.
• Chemotactic factors influence eosinophil migration and activity.

Purpose of the Study:

• To investigate serum eosinophil chemotactic activity in patients with eosinophilic fasciitis.
• To compare this activity with controls having systemic sclerosis and diffuse scleroderma.
• To explore the potential presence of an eosinophilotactic serum factor.

Main Methods:

• Utilized the Boyden chamber technique to measure serum eosinophil chemotactic activity.
• Assessed 20 patients diagnosed with eosinophilic fasciitis.
• Included 20 control subjects with systemic sclerosis and diffuse scleroderma.

Main Results:

• All 20 eosinophilic fasciitis patients showed significantly increased serum eosinophil chemotactic activity (mean 297%).
• Only 30% of controls (systemic sclerosis/diffuse scleroderma) exhibited elevated activity (mean 96%).
• Longitudinal analysis in 8 patients showed decreased activity, normalizing in only 3, all on prolonged corticosteroid therapy.

Conclusions:

• Elevated serum eosinophil chemotactic activity is a hallmark of eosinophilic fasciitis.
• A distinct eosinophilotactic serum factor may be present in eosinophilic fasciitis.
• Corticosteroid therapy may influence serum eosinophil chemotactic activity levels.