Pemphigus vulgaris (PV) is a paradigm of autoimmune disease affecting intercellular adhesion. The mechanisms that lead to cell–cell detachment (acantholysis) have crucial therapeutic implications and are currently undergoing major scrutiny. The first part of this review focuses on the classical view of the pathogenesis of PV, which is dominated by the cell adhesion molecules of the desmosome, namely desmogleins (Dsgs). Cloning of the DSG3 gene, generation DSG3 knock-out mice and isolation of monoclonal anti-Dsg3 IgG have aided to clarify the pathogenic mechanisms of PV, which are in part dependent on the fate of desmosomal molecules. These include perturbation of the desmosomal network at the transcriptional, translational, and interaction level, kinase activation, proteinase-mediated degradation, and hyper-adhesion. By the use of PV models, translational research has in turn helped shed light into the basic structure, function, and dynamics of assembly of desmosomal cadherins. The combined efforts of basic and applied research has resulted in tremendous advance into the understanding of epidermal adhesion and helped debunk old myths on the supposedly unique role of desmogleins in the mechanisms of cell–cell detachment in PV.
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Pemphigus foliaceus (PF) is the most common autoimmune skin disease of dogs and other animal species. Although PF can spontaneously affect dogs of any breed, it appears more prevalent in Akita Inus and chow chows in the United States. The primary lesions are large pustules which rupture easily and progress rapidly to erosions and crusts. Lesion distribution most often involves the face, nasal planum, and ears. One third of affected dogs have paw pad lesions. Skin lesions of PF can remain localized or involve the entire body. The diagnosis of PF in dogs is based on historical information, clinical signs,
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and the demonstration of acantholytic keratinocytes in vesicles or pustules. (Source: Advances in Small Animal Medicine and Surgery)
Article can be purchased from : http://www.advancesinsmallanimal.com/article/PIIS1041782612000230/abstract?rss=yes
OBJECTIVES: To determine the clinical and epidemiologic characteristics of endemic pemphigus and the risk factors of patients for developing complications during treatment.
METHODS: A study was carried out from July 2003 to March 2008. The study population was 60 patients with EPF and 7 patients with EPV evaluated in hospitals and clinics in the Peruvian Amazon and Lima. A multivariate analysis was carried out using binary logistic regression.
RESULTS: The average age of EPF patients was 31.4 years; 55% were men; 60% presented the generalized clinical variant. Non-compliance with the treatment was seen in 57.1% of the patients. Thirty-five percent presented complications (e.g. pyodermitis and pyelonephritis) during treatment. The risk factors for developing complications during treatment were non-compliance with the treatment and having the generalized clinical form. In the EPV group, the average age was 21.7 years; 71.4% were men. All patients presented with the mucocutaneous clinical variant and the initial presentation consisted of oral mucosa lesions; 71.4% presented complications during treatment, pyodermitis being the most frequent.
CONCLUSIONS: Non-compliance with the treatment and the generalized clinical form are risk factors for the development of complications during treatment of patients with EPF. Peru indeed has EPV cases with epidemiologic characteristics similar to EPF. Living in a rural area may represent a risk factor for the development of complications during treatment of patients with EPV.
Full article can be viewed here: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0365-05962012000600003&lng=en&nrm=iso&tlng=en
Full article can be viewed here: http://www.hindawi.com/crim/dm/2012/207126/
Full article (free) found here: http://www.hindawi.com/isrn/dermatology/2012/237802/
Full article can be viewed on: http://www.hindawi.com/journals/ad/2012/296214/
Pemphigus foliaceus (PF) is an immune-mediated disease that causes pustules and crusted lesions, most commonly on the pinnae, nasal planum, periocular area, chin, feet of affected cats. Acantholytic cells caused by dehydration of intercellular adhesions are often seen on cytology but are not pathognomic for PF. A definitive diagnosis is made based on histopathology showing subcorneal pustules with nondegenerate neutrophils and acantholytic cells. PF is treated with immunosuppressive doses of corticosteroids alone or in combination with other immunosuppresive medications, such as chlorambucil or cyclosporine. Most patients require lifelong treatment with these medications to keep the disease in remission.
Hershey, a 6-year-old, spayed domestic shorthaired cat weighing 3.4 kg, presented with an acute onset of nonpruritic crusted lesions on the head, ears, nail beds, and nasal
area. She had a 2-day history of lethargy and anorexia. She had no history of medical disease and was up-to-date on vaccinations.