Human OA Peripheral Blood Mononuclear Cells

Description

Human Osteoarthritis Peripheral Blood Mononuclear Cells (hOA-PBMCs) are isolated from OA patients and consist of lymphocytes (T cells, B cells, NK cells) and monocytes that contribute to OA’ s chronic low-grade inflammation. These cells exhibit a proinflammatory phenotype, secreting elevated levels of catabolic cytokines (TNF-α, IL-1β, IL-6) that drive cartilage matrix degradation via MMP-13 activation and suppress proteoglycan synthesis. hOA-PBMCs show Th1/Th17 polarization with reduced regulatory T cell (Tregs) function, perpetuating synovitis. Monocytes differentiate into M1-like macrophages that amplify inflammatory cascades through COX-2/PGE2 signaling, while altered NK cell activity may impair tissue repair. The PBMC compartment in OA patients also demonstrates elevated DAMPs (e.g., S100A8/A9) and NLRP3 inflammasome activation, linking metabolic stress to joint pathology. These systemic immune disturbances mirror synovial inflammation, making hOA-PBMCs valuable for studying OA progression, identifying biomarkers, and testing disease-modifying therapies targeting immune-metabolic crosstalk. In translational research, hOA-PBMCs are widely used for immune cell phenotyping, inflammatory cytokine profiling, identification of blood-based markers of joint inflammation, and investigation of systemic immune mechanisms contributing to osteoarthritis progression.