Pemphigus Vulgaris IgG and Methylprednisolone Exhibit Reciprocal Effects on Keratinocytes

The study investigated the effects of Pemphigus Vulgaris (PV) IgG and methylprednisolone (MP) on keratinocytes using an animal model and human cell cultures. PV IgG was found to induce acantholysis, while MP significantly reduced this effect, decreasing keratinocyte detachment from 77.5% to 24.1% in mice. MP modulated gene expression, up-regulating adhesion molecules like E-cadherin and desmogleins, counteracting the effects of PV IgG. The research suggested that MP's therapeutic effects in PV involved both genomic and non-genomic actions, enhancing keratinocyte adhesion and modifying post-translational processes, offering potential insights into non-steroidal treatments for pemphigus.