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Pathogenic human monoclonal antibody against desmoglein 3.

机译:抗桥粒芯蛋白的致病性人单克隆抗体3。

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摘要

Pemphigus vulgaris (PV) is a potentially fatal autoimmune mucocutaneous disease associated with production of IgG autoantibodies to desmoglein 3 (Dsg3), a 130-kDa epidermal cadherin protein. The binding of pathogenic antibody to Dsg3 on epidermal keratinocytes leads to loss of intercellular adhesion and results in intraepithelial blister formation. Here, we describe a human monoclonal antibody, PVMAB786, a Dsg3-specific IgG4 antibody, from an untreated patient with active PV. The antibody reacts with a 130-kDa protein on keratinocyte cell surfaces and recombinant Dsg3 protein, but not desmoglein 1 protein. PVMAB786 induces acantholysis in normal human skin and mucous membranes and induces a clinical and histological profile similar to human PV when injected into neonatal mice. PVMAB786 will be a valuable tool in identifying the role of Dsg3 in epithelial cell adherence and acantholysis, mechanisms of Dsg3 processing/presentation and V gene and isotype usage in PV pathogenesis.
机译:寻常型天疱疮(PV)是一种潜在的致命性自身免疫性皮肤粘膜疾病,与抗桥蛋白3(Dsg3)(130 kDa表皮钙粘蛋白)的IgG自身抗体产生有关。病原性抗体与表皮角质形成细胞上Dsg3的结合导致细胞间粘附的丧失,并导致上皮内水疱形成。在这里,我们描述了未经治疗的活动性PV患者的人单克隆抗体PVMAB786,一种Dsg3特异性IgG4抗体。该抗体与角质形成细胞表面上的130 kDa蛋白和重组Dsg3蛋白反应,而与desmoglein 1蛋白反应。当注入新生小鼠时,PVMAB786在正常人的皮肤和粘膜中诱导棘层松解,并诱导类似于人PV的临床和组织学特征。 PVMAB786将是鉴定Dsg3在上皮细胞粘附和棘层松解中的作用,Dsg3加工/呈递的机制以及V基因和同种型在PV发病机制中使用的重要工具。

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