Synergistic Roles of Macrophages and Neutrophils in Osteoarthritis Progression
| Autor: | Virginia B. Kraus, M.-F. Hsueh, Michaelichael P Bolognesi, Xin Zhang, Samuelamuel S Wellman |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Adult
Male Neutrophils T-Lymphocytes medicine.medical_treatment Immunology Osteoarthritis Article Flow cytometry Transforming Growth Factor beta1 Pathogenesis Immune system Rheumatology Synovial Fluid medicine Humans Immunology and Allergy Macrophage Synovial fluid Arthroplasty Replacement Knee Aged Aged 80 and over medicine.diagnostic_test business.industry Macrophages Synovial Membrane Elastase Middle Aged Osteoarthritis Knee Flow Cytometry medicine.disease Cytokine Disease Progression Cytokines Female Leukocyte Elastase business |
| Zdroj: | Arthritis Rheumatol |
| ISSN: | 2326-5205 2326-5191 |
| Popis: | Objective To evaluate the role of immune cells and their effector cytokines in the pathogenesis and progression of knee osteoarthritis (OA) in matched OA synovial fluid (SF) and synovial tissue samples. Methods Cells from matched samples of synovial tissue and SF acquired from individuals undergoing total knee replacement for OA (n = 39) were characterized for immune cell-associated surface markers and intracellular cytokine expression using polychromatic flow cytometry. Additional individuals with radiographic knee OA (Kellgren/Lawrence severity grades ≥1) who had available etarfolatide (inflammatory cell) imaging (n = 26) or baseline and 3-year data on progression of radiographic knee OA (n = 85) were also assessed. SF cytokine concentrations in all cohorts were evaluated for associations with synovial tissue and SF cell phenotypes and severity of radiographic knee OA. Results Macrophages (predominant in the synovial tissue, 53% of total cells) and neutrophils (predominant in the SF, 26% of total cells) were the major immune cell populations identified in the OA knee joints, exhibiting expression of or association with transforming growth factor β1 (TGFβ1) and elastase, respectively, in the SF. Expression levels of TGFβ1 and elastase were significantly associated with severity of radiographic knee OA. Baseline SF concentrations of TGFβ1 and elastase along with radiographic knee OA severity scores were predictive of knee OA progression, with areas under the receiver operating characteristic curves of 0.810 (for TGFβ1), 0.806 (for elastase), and 0.846 (for both TGFβ1 and elastase combined), with greater stability of prediction when both markers were utilized. Conclusion Our findings demonstrate the hitherto underappreciated role of neutrophils in the sterile inflammatory process and progression of OA. Two soluble mediators, SF elastase and TGFβ1, are strong predictors of knee OA progression, reflecting a synergistic role of neutrophil and macrophage populations in the pathogenesis and worsening of OA that could potentially be utilized to identify patients who may have a greater risk of more rapid disease progression. |
| Databáze: | OpenAIRE |
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