
Epitope Spreading in Paraneoplastic Pemphigus
Autoimmune Induction in Antibody-Mediated Blistering Skin Diseases
Arch Dermatol. 2000;136:663-664.
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WITHIN THE last 10 years, an immunologic phenomenon termed epitope spreading has been increasingly recognized as an important pathogenic mechanism responsible for the initiation and/or progression of autoimmune diseases.1-2 Epitope spreading could be defined as a specific autoreactive lymphocyte (T- or B-cell) response to endogenous epitopes, which are distinct from and noncross-reactive with the disease-inducing epitopes, on the (same or different) proteins secondary to the release of such a self-protein during an autoimmune response.2-3 Similarly, a specific primary autoreactive lymphocyte response to endogenous epitopes can arise from an inflammatory injury that releases the involved epitopes.2-3 In other words, an autoimmune or inflammatory disease process can cause tissue damage such that certain protein tissue components originally hidden from the autoreactive T or B cells become exposed and evoke a secondary or primary autoimmune response, respectively (Figure 1).2-3
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