Tag Archives: autoantibody

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Anti-p200 pemphigoid is a rare subepidermal blistering disease associated with autoantibodies against a 200kDa protein, reportedly corresponding to laminin γ1. However, direct evidence of the pathogenic potential of these antibodies is missing. We have followed up a patient with anti-p200 pemphigoid for five years. During this period she experienced a total of three generalised relapses. Quantifying our patient’s autoantibody concentrations against laminin γ1 by ELISA throughout the course of her disease we demonstrated a clear correlation with disease activity, thus providing first evidence of the possible pathogenic role of antibodies against laminin γ1 in anti-p200 pemphigoid. Further analysis by Western blotting revealed the occurrence of additional autoantibodies against α3 chain of laminin 332 1½ years after diagnosis, suggestive of intermolecular epitope spreading. Yet, the clinical appearance was unchanged and mucous membranes remained unaffected at any stage of the disease.

http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2133.2012.11076.x/abstract;jsessionid=2CC44AEBB9086AAB7009C30B7627506C.d02t01

 

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By Grant J. Anhalt, M.D.
Johns Hopkins Dermatology

I will attempt to clarify what we know about the antibody response in various forms of pemphigus and how the distribution of the targeted antigens affects the location of lesions. The synthesis of this work has been proposed by Dr. John Stanley, with key published advances from Dr. Masa Amagai and Mai Mahoney, Ph.D., P. Koch and others. John Stanley refers to his concept as the “desmoglein compensation hypothesis”. The key to this hypothesis is the desmogleins (pemphigus antigens) are key adhesion molecules that keep cells attached to each other. In some areas of the body, there are two desmogleins present, and both have to be damaged to cause cell detachment – in some areas only one desmoglein may be present at some level in the skin or mucous membrane, and there only one desmoglein has to be damaged to cause cell detachment.

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By David A. Sirois, D.M.D., Ph.D.
Department of Oral Medicine

Pemphigus vulgaris is a chronic autoimmune disease affecting the mucosa and skin and resulting in epithelial acantholysis, bullae formation, and chronic ulceration.1 Skin lesions of pemphigus vulgaris present clinically with typical bullae formation and ulceration. However, oral mucosal manifestations are less characteristic, typically occurring as multiple, chronic mucosal erosions or superficial ulcerations of various sizes and rarely presenting with intact bullae.2 Although pemphigus vulgaris is widely considered a skin disease, several reports of cases and case series have described it frequently as the initial, and occasionally the exclusive, site of involvement.2, 3 Thus, the unfamiliar features of oral pemphigus vulgaris could result in longer diagnostic and treatment delays than cutaneous pemphigus, which could adversely affect treatment response and prognosis.4, 5 The present study explored the natural history and diagnostic pattern of pemphigus vulgaris among 99 patients, with specific interest in the differences between oral and cutaneous pemphigus.