Human SLE Peripheral Blood Mononuclear Cells

Description

Human Systemic Lupus Erythematosus Peripheral Blood Mononuclear Cells (PBMCs) are isolated from SLE patients, they consist of lymphocytes (T cells, B cells, NK cells), monocytes, and dendritic cells that exhibit characteristic autoimmune dysregulation. These PBMCs demonstrate B cell hyperactivity with elevated expression of activation markers (CD69, CD86) and increased production of pathogenic autoantibodies (anti-dsDNA, anti-Smith). A prominent type I interferon signature, driven by plasmacytoid dendritic cell-derived IFN-α, upregulates interferon-stimulated genes (ISG15, MX1) throughout the PBMC compartment. T cell subsets show significant imbalance, with expanded Th17 populations and impaired regulatory T cell function, while monocytes exhibit enhanced Fcγ receptor-mediated phagocytosis of immune complexes. These abnormalities contribute to the systemic inflammation observed in SLE, evidenced by elevated serum levels of IL-6, BAFF, and TWEAK that correlate with clinical manifestations including lupus nephritis and cutaneous involvement. These PBMCs provide a valuable model for studying SLE pathogenesis, including immune tolerance breakdown, interferon-driven inflammation, as well as for evaluating targeted therapeutic strategies. In translational and clinical research, they are widely used to identify blood-based biomarkers, analyze adaptive and innate immune responses.