Department of Dermatology, Peking University First Hospital, and
National Clinical Research Center for Skin and Immune Diseases, and
Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China
These authors contributed equally
Background: Autoimmune blistering diseases (AIBDs) are a group of fatal diseases with specific autoantibodies. BIOCHIP mosaic is a novel and all-in-one measure used for the rapid diagnosis of AIBDs. Objectives: To evaluate the diagnostic accuracy based on BIOCHIP mosaic (FA1501-1005-60) in Chinese patients with AIBDs. Materials and Methods: Seventy-seven patients with AIBDs and 20 controls were enrolled. The BIOCHIP mosaic was performed using both serum and plasma samples. Results: Based on BIOCHIP mosaic, the data from paired plasma and serum samples demonstrated a high degree of concordance (Cohen's kappa = 0.896-1.000) for autoantibodies against Dsg1, Dsg3, BP180-NC16A-4X, BP230gC, prickle-cell desmosomes, and pemphigoid antigens. Moreover, BIOCHIP mosaic also demonstrated a high degree of consistency for the detection rate of anti-Dsg1, Dsg3, plakins, BP180-NC16A-4X and non-collagenous domain of type VII collagen autoantibodies for the diagnosis of pemphigus foliaceus (77.3%), pemphigus vulgaris (88.6%), paraneoplastic pemphigus (100.0%), bullous pemphigoid (92.8%) and epidermolysis bullosa acquisita (99.0%), respectively. Conclusion: Using BIOCHIP mosaic, serum and plasma samples may be used interchangeably at 1/10 dilution. Overall, the BIOCHIP mosaic was shown to be a useful and accurate tool for the diagnosis of AIBDs.