SorLA regulates B cell receptor uptake, trafficking, and B cell-mediated immune responses in vivo.

SorLA controls B cell receptor trafficking and immune responses, with its deletion reducing plasma cells and humoral immunity in vivo.

• Why it matters: Understanding B cell antigen processing is vital for improving vaccines and treating autoimmune diseases, but the cellular mechanisms remain incompletely understood.
• What they did: Researchers used genetic deletion of SorLA to study its role in BCR endocytosis and trafficking, revealing its association with BCR and impact on antigen handling.
• The result: Loss of SorLA led to altered antigen trafficking and decreased antibody-producing plasma cells, highlighting a new pathway that influences immune regulation and potential disease interventions.