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Cited by 616

The DOI matches its Crossref record; 47 of the 47 references it cites were found in a registry or an index.

Mechanisms of TNF-α– and RANKL-mediated osteoclastogenesis and bone resorption in psoriatic arthritis

Open access
Ritchlin, Christopher T., Haas-Smith, Sally A., Li, Ping, Hicks, David G., Schwarz, Edward M.·2003·Journal of Clinical Investigation

Abstract

Psoriatic arthritis (PsA) is an inflammatory joint disease characterized by extensive bone resorption. The mechanisms underlying this matrix loss have not been elucidated. We report here that blood samples from PsA patients, particularly those with bone erosions visible on plain radiographs, exhibit a marked increase in osteoclast precursors (OCPs) compared with those from healthy controls. Moreover, PsA PBMCs readily formed osteoclasts in vitro without exogenous receptor activator of NF-kappaB ligand (RANKL) or MCSF. Both osteoprotegerin (OPG) and anti-TNF antibodies inhibited osteoclast formation. Additionally, cultured PsA PBMCs spontaneously secreted higher levels of TNF-alpha than did healthy controls. In vivo, OCP frequency declined substantially in PsA patients following treatment with anti-TNF agents. Immunohistochemical analysis of subchondral bone and synovium revealed RANK-positive perivascular mononuclear cells and osteoclasts in PsA specimens. RANKL expression was dramatically upregulated in the synovial lining layer, while OPG immunostaining was restricted to the endothelium. These results suggest a model for understanding the pathogenesis of aggressive bone erosions in PsA. OCPs arise from TNF-alpha-activated PBMCs that migrate to the inflamed synovium and subchondral bone, where they are exposed to unopposed RANKL and TNF-alpha. This leads to osteoclastogenesis at the erosion front and in subchondral bone, resulting in a bidirectional assault on psoriatic bone.

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Metadata

Authors
Ritchlin, C. T., Haas-Smith, S. A., Li, P., Hicks, D. G., & Schwarz, E. M.
Venue
Journal of Clinical Investigation
Published
2003-03-15
Volume
111
Issue
6
Pages
821-831
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2129685099
Cited by
616
References
47
FWCI
10.29
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Mechanisms of TNF-α– and RANKL-mediated osteoclastogenesis and bone resorption in psoriatic arthritis. https://app.cochat.ai/papers/10.1172/jci16069
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Ritchlin, C. T., Haas-Smith, S. A., Li, P., Hicks, D. G., & Schwarz, E. M. (2003). Mechanisms of TNF-α– and RANKL-mediated osteoclastogenesis and bone resorption in psoriatic arthritis. Journal of Clinical Investigation. https://doi.org/10.1172/jci16069

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.