Peripheral blood mononuclear cell secretome from patients with autoimmune encephalitis promotes seizures in vitro.

Objective: Autoimmune encephalitis (AE) is characterized by inflammatory processes in the central nervous system and frequently presents with seizures. Even though an ictogenic potential has been shown for some antibodies against neuronal surface antigens (NSAbs), AE pathophysiology is complex, and NSAbs-independent mechanisms are likely to contribute to seizures. We investigated whether the secretome released by peripheral blood mononuclear cells (PBMCs) from AE patients contributes to seizure generation independently of NSAbs.