Erika Barboza Prado Lopes1, Adrian Filiberti2, Syed Ali Husain2, Mary Beth Humphrey3,4. 1. Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA. 2. Department of Medicine, University of Oklahoma Health Sciences Center, 975 N.E. 10th St, BRC 256, Oklahoma City, OK, 73104, USA. 3. Department of Medicine, University of Oklahoma Health Sciences Center, 975 N.E. 10th St, BRC 256, Oklahoma City, OK, 73104, USA. marybeth-humphrey@ouhsc.edu. 4. Oklahoma City Veterans Affairs, Oklahoma City, OK, USA. marybeth-humphrey@ouhsc.edu.
Abstract
PURPOSE OF THE REVIEW: Mounting evidence supports a role of low-grade inflammation in the pathophysiology of osteoarthritis (OA). We review and discuss the role of synovitis, complement activation, cytokines, and immune cell population in OA. RECENT FINDINGS: Using newer imaging modalities, synovitis is found in the majority of knees with OA. Complement activation and pro-inflammatory cytokines play a significant role in the development of cartilage destruction and synovitis. Immune cell infiltration of OA synovial tissue by sub-populations of T cells and activated macrophages correlates with OA disease progression and pain. The innate and acquired immune system plays a key role in the low-grade inflammation found associated with OA. Targets of these pathways my hold promise for future disease-modifying osteoarthritis drugs (DMOADs).
PURPOSE OF THE REVIEW: Mounting evidence supports a role of low-grade inflammation in the pathophysiology of osteoarthritis (OA). We review and discuss the role of synovitis, complement activation, cytokines, and immune cell population in OA. RECENT FINDINGS: Using newer imaging modalities, synovitis is found in the majority of knees with OA. Complement activation and pro-inflammatory cytokines play a significant role in the development of cartilage destruction and synovitis. Immune cell infiltration of OA synovial tissue by sub-populations of T cells and activated macrophages correlates with OA disease progression and pain. The innate and acquired immune system plays a key role in the low-grade inflammation found associated with OA. Targets of these pathways my hold promise for future disease-modifying osteoarthritis drugs (DMOADs).
Entities:
Keywords:
Chemokines; Macrophages; Osteoarthritis; Synovitis; T cells
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