Systemic Interferon-Gamma Therapy for Atopic Dermatitis

Jung, Sun Hee; Oh, Su Kyeong; Yoon, Un Ki; Oh, Ji Sub

Abstract

PURPOSE
Atopic dermatitis is a chronic, inflammatory skin disease characterized by intense pruritus and an immunologic profile consistent with allergic disease. It is associated with increased eosinophil and IgE level and decreased INF-gamma production. We describe the result of a treatment with INF-gammaand assess the clinical, immunologic, and laboratory data of 12 patients with atopic dermatitis.
METHODS
Twelve patients were treated for 12 weeks with 2x106 units/m2 INF-gamma by subcutaneous injection. General hematologic tests were done, and total eosinophil counts, eosinophil fractions, neutrophil fractions, and IgE levels were measured before the treatment, 2 weeks after the treatment, 12 weeks after the treatment serially. We also followed up the patients for 12 weeks after discontinuing INF-gammatherapy.
RESULTS
All patients showed clinically significant improvement after 12 weeks of the systemic INF-gammatherapy. There was no clinical aggravation during the therapy period and the follow-up 4 weeks without the therapy. But the recurrence rate in the 12 weeks after discontinuing the therapy was about 40%. Eosinophil counts and eosinophil fractions were significantly decreased after the therapy. And, eosinophil counts and eosinophil fractions were increased in clinically aggravated patients during the 12 weeks of off-therapy.
CONCLUSION
We conclude that INF-gammais an effective therapy in atopic dermatitis without significant side effects. The eosinophil counts and eosinophil fractions were decreased during the INF-gamma therapy, and increased in clinically aggravated patients after the off-therapy. There was no aggravation during the therapy. But 5 patients were clinically aggravated during the 12 weeks of off-therapy. Further studies for a long-term maintenance therapy and its side effect might be needed in chronic atopic dermatitis.