TYK2 and systemic lupus erythematosus: Several other drugs targeting critical molecules in the IFN signaling pathways – including BCDA-2 (Blood Dendritic Cell Antigen 2), TLR7/8 (Toll-like receptor 7/8), and TYK2 (Tyrosine Kinase 2) – are currently in early clinical phases, potentially expanding therapeutic options for SLE.