Rituximab is a beneficial and relatively safe adjuvant treatment for PV that facilitates prolonged clinical remission and has a significant steroid-sparing effect.

BackgroundSoluble CD200 (sCD200) is a novel immuno-effective molecule, which acts to regulate inflammatory and acquired immune responses. Recently, our study group showed that sCD200 was present in serum and blister fluid in a patient with bullous pemphigoid and a patient with toxic epidermal necrolysis. We therefore planned this study to evaluate the sCD200 levels of autoimmune and inflammatory skin disorder patients and to compare them with that of healthy controls.Maleral/MethodsOur study included 30 consecutive patients with psoriasis vulgaris, 15 with pemphigus vulgaris, and 15 healthy controls. Clinical examination and laboratory tests were performed on the same day. Psoriasis patients were also assessed with the Psoriasis Area and Severity Index (PASI) and pemphigus patients were assessed using the Pemphigus Disease Area Index (PDAI). Levels of sCD200 in the serum samples were quantified using ELISA kits.ResultsThe serum sCD200 level was observed to be statistically significantly higher in patients with psoriasis vulgaris (96.7±15.8) compared to patients with pemphigus vulgaris (76.2±14.6), (p<0.001) and healthy controls (26.8±7.0) (p<0.001). The serum sCD200 levels were observed to be statistically significantly higher in patients with pemphigus vulgaris compared with that in healthy controls (p<0.001). In addition, there was a statistically significant correlation between serum sCD200 levels and PDAI (r=0.987, p=0.001). Nevertheless, there was no statistically significant correlation between serum sCD200 levels and PASI (r=0.154, p=0.407).ConclusionssCD200 might play a role in immune response in the pathogenesis of autoimmune and inflammatory skin disorders. However, it remains to be fully elucidated how sCD200 can orchestrate inflammatory response in psoriasis and pemphigus.

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Background and Design: Pemphigus vulgaris (PV) is a severe, chronic, potentially life-threatening autoimmune blistering disease that affects the skin and mucous membranes, associated with the loss of cell-cell adhesion and blister formation. Systemic steroids in combination with immunosuppressive agents are the mainstay of therapy in pemphigus. Rituximab, a chimeric monoclonal anti-CD20 antibody, has been tried increasingly for the treatment of PV. Materials and Methods: We sought to test the efficacy and safety of rituximab as an adjuvant therapy by retrospective analysis of clinical and immunological data of patients. We performed a retrospective analysis of 13 patients with refractory pemphigus vulgaris who were treated with rituximab at Akdeniz University Hospital, Clinic of Dermatology and Venereology, Bullous Disease Unit. We evaluated clinical and immunological data with last treatments. Results: The patients were treated with one cycle of two biweekly infusions of rituximab at a dose of 1000 mg on days 1 and 15, except one received four doses of 375 mg/m 2 weekly. The mean follow-up time was 18.5 months. All patients had a decrease in antibody titers