Desmoglein III Antibody

Desmoglein III Antibody Test

The Desmoglein III Antibody (DSG3 Ab) test detects autoantibodies against Desmoglein-3, a protein that helps skin cells stick together. This test is primarily used to diagnose Pemphigus Vulgaris (PV), an autoimmune blistering skin disease.

Why is the Test Done?

✅ To diagnose Pemphigus Vulgaris (PV), an autoimmune skin disorder
✅ To differentiate Pemphigus Vulgaris from other blistering diseases
✅ To monitor disease activity and treatment response

Normal Range & Interpretation

What Does a Positive Desmoglein III Antibody Mean?

🔴 High levels (>30 U/mL) → Pemphigus Vulgaris (PV) likely
🔴 Desmoglein I & III Antibodies together → More widespread disease (Mucocutaneous PV)
🔴 Monitoring levels → Helps track disease progression or treatment response

Symptoms of Pemphigus Vulgaris (PV)

⚠ Painful blisters in the mouth & skin
⚠ Erosions that don’t heal easily
⚠ Skin peeling with minimal pressure (Nikolsky’s Sign)
⚠ Difficulty eating/swallowing if mouth is affected

Additional Tests for PV Diagnosis

🔹 Desmoglein I Antibody – Helps differentiate from Pemphigus Foliaceus
🔹 Skin Biopsy with Direct Immunofluorescence (DIF) – Confirms autoantibody deposits
🔹 Indirect Immunofluorescence (IIF) – Detects circulating autoantibodies
🔹 ELISA for DSG1 & DSG3 – Quantifies autoantibody levels

Treatment of Pemphigus Vulgaris

✔ Corticosteroids (Prednisone) – First-line treatment
✔ Immunosuppressants (Azathioprine, Mycophenolate Mofetil) – To control autoimmunity
✔ Rituximab (Biologic Therapy) – Effective in severe cases
✔ Wound care & pain management – Prevents infections