Bullous disease in which autoantibodies are formed against antigens of epidermal intercellular junctions
**Core Concept**
Autoantibodies against epidermal intercellular junctions lead to a bullous disease, which disrupts the normal adhesion between keratinocytes. This process results in the formation of blisters within the epidermis. The primary target antigen in such autoimmune diseases is desmoglein, a component of desmosomes.
**Why the Correct Answer is Right**
The autoantibodies in question target desmoglein 3, a protein crucial for the adhesion between keratinocytes in the epidermis. The presence of these autoantibodies disrupts the normal function of desmosomes, leading to the formation of intraepidermal blisters. This bullous disease is characterized by the presence of autoantibodies against epidermal intercellular junctions, specifically against desmoglein 3.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the disease in question does not primarily involve autoantibodies against basement membrane zone components, such as collagen VII.
**Option B:** This option is incorrect because pemphigus foliaceus is characterized by autoantibodies against desmoglein 1, not desmoglein 3.
**Option C:** This option is incorrect because bullous pemphigoid involves autoantibodies against components of the basement membrane zone, not epidermal intercellular junctions.
**Option D:** This option is incorrect because epidermolysis bullosa acquisita involves autoantibodies against collagen VII, a component of the basement membrane zone.
**Clinical Pearl / High-Yield Fact**
Autoantibodies against epidermal intercellular junctions, such as desmoglein 3, are a hallmark of pemphigus vulgaris, a chronic autoimmune bullous disease. The presence of these autoantibodies disrupts the normal adhesion between keratinocytes, leading to the formation of intraepidermal blisters.
**Correct Answer:** D. Bullous pemphigoid.