Neutrophil Elastase Is Critical In Linear IgA Bullous Dermatosis In Mice
April 2023
in “
Journal of Investigative Dermatology
”
neutrophil elastase linear IgA bullous dermatosis Primer Cicatricial Alopecias scarring alopecia hair follicle CD8+ T cells epithelial hair follicle stem cells fibrosis CD200R CD200-CD200R signaling pathway immune privilege LPP CCCA DLE scarring hair loss hair follicle stem cells immune system attack lichen planopilaris central centrifugal cicatricial alopecia discoid lupus erythematosus
TLDR CD8+ T cells attack hair follicle stem cells, causing scarring and hair loss.
The study investigates the role of neutrophil elastase (NE) in linear IgA bullous dermatosis (LABD) using a humanized mouse model expressing the human BP180 NC16A domain. When these mice were injected with anti-NC16A IgA from LABD patients and reconstituted with human neutrophils, they developed subepidermal blisters, IgA deposition, and increased NE and MMP-9 levels. In vitro, anti-NC16A IgA activated neutrophils to release NE and MMP-9. Blocking NE significantly reduced disease severity, highlighting NE's critical role in LABD pathogenesis.
