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자료유형
학술저널
저자정보
임미진 (인하대학교) 권성렬 (인하대학교) 정경희 (인하대학교) 박원 (인하대학교)
저널정보
대한류마티스학회 대한류마티스학회지 대한류마티스학회지 제23권 제6호
발행연도
2016.1
수록면
356 - 362 (7page)

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Objective. This study examines the effects of tumor necrosis factor (TNF) blockade on markers of bone metabolism in peripheral blood from active rheumatoid arthritis (RA) patients. Methods. Eighteen patients (16 women, 2 men) aged 50 years (range 37-63 years), with persistently active RA (mean disease duration 7 years) were studied. Most took methotrexate (mean dose 12.5 mg) and all except one received corticosteroid (mean dose 5.7 mg). Four were treated with etanercept, eight received adalimumab and six received infliximab. Before and six months after taking TNF blockers, blood was sampled to obtain peripheral blood mononuclear cells (PBMCs), and serum bone turnover markers and acute phase reactants were measured. PBMCs were seeded and cultured to produce osteoblastic lineage cells and osteoclasts. Results. The formation of calcified nodules by osteoblastic lineage cells from PBMC increased from 205.7±196.3 μmol/well at the baseline to 752.5±671.9 μmol/well after TNF blockade (p<0.024). The serum levels of bone formation markers, including bone specific alkaline phosphatase and osteocalcin also increased. The number of circulating osteoclasts and area of bone resorption pits made by osteoclasts were reduced after TNF blockade. Conclusion. The activity of circulating osteoblastic lineage cells increased after TNF blockade, whereas peripheral osteoclastogenesis tended to be suppressed. This is the first study of cultured human peripheral osteoblastic lineage cells in RA patients. Given that peripheral bone formation is difficult to study using radiologic methods, culture of these cells may provide a new modality for studying bone metabolism in RA. (J Rheum Dis 2016;23:356-362)

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