Dapsone and human polymorphonuclear leucocyte chemotaxis in dermatitis herpetiformis

Area of Science:

• Dermatology
• Immunology
• Cell Biology

Background:

• Dermatitis herpetiformis is a chronic autoimmune blistering skin disease.
• Polymorphonuclear leucocytes (PMNs) play a role in inflammatory skin conditions.
• The chemotactic activity of PMNs in dermatitis herpetiformis has not been fully elucidated.

Purpose of the Study:

• To investigate polymorphonuclear leucocyte chemotaxis in patients with active dermatitis herpetiformis.
• To compare PMN chemotaxis in untreated active dermatitis herpetiformis with that in Dapsone-treated patients and healthy controls.
• To assess the direct effect of Dapsone on PMN chemotaxis.

Main Methods:

• Recruitment of 6 patients with active dermatitis herpetiformis and 7 healthy volunteers.
• Assessment of polymorphonuclear leucocyte chemotaxis in untreated patients, Dapsone-treated patients, and controls.
• In vitro addition of Dapsone to study its effect on chemotaxis.

Main Results:

• No significant difference in polymorphonuclear leucocyte chemotaxis was observed between active untreated dermatitis herpetiformis patients, Dapsone-treated patients, and healthy controls.
• Dapsone, when added in physiological concentrations, did not alter PMN chemotaxis in any of the study groups.
• These findings indicate that PMNs from active untreated dermatitis herpetiformis exhibit normal chemotactic activity.

Conclusions:

• Polymorphonuclear leucocyte chemotaxis is not impaired in active untreated dermatitis herpetiformis.
• Dapsone treatment does not normalize an abnormal chemotactic response, as the response is already normal.
• Dapsone does not directly influence polymorphonuclear leucocyte chemotaxis in this condition.