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Erschienen in: Calcified Tissue International 1/2017

28.02.2017 | Original Research

Titer-Dependent Effect of Anti-Citrullinated Protein Antibodies On Systemic Bone Mass in Rheumatoid Arthritis Patients

verfasst von: Giovanni Orsolini, Cristian Caimmi, Ombretta Viapiana, Luca Idolazzi, Elena Fracassi, Davide Gatti, Giovanni Adami, Maurizio Rossini

Erschienen in: Calcified Tissue International | Ausgabe 1/2017

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Abstract

Bone loss in rheumatoid arthritis (RA) is a key feature both local and systemic. Anti-citrullinated protein antibodies (ACPA) have recently been found to directly induce differentiation and activation of osteoclasts and therefore contribute to periarticular bone loss. The aim of this study was to analyze the effect of ACPA on systemic bone mineral density (BMD) in patients with established RA. This is a cross-sectional study with a single-center RA population. BMD was measured with Dual X-ray absorptiometry at lumbar and femoral sites. ACPA were measured by EIA. Multivariate analysis was performed adjusting for the main confounding variables. One hundred twenty-seven RA patients were enrolled. In univariate analysis, ACPA-positive patients showed lower BMD Z-score (SD below the age- and gender-matched mean reference value) at femoral sites (p < 0.01). A negative correlation between ACPA titer and BMD Z-score at all sites was observed (p < 0.01). The multivariate analysis adjusted for the main confounding variables confirmed the negative effect of ACPA at femoral sites (p < 0.05), but not at lumbar spine BMD. No significant effect of rheumatoid factor has been observed. ACPA have a negative titer-dependent effect on BMD at femoral sites, mainly constituted by cortical bone. ACPA-positive patients, especially if at high titer, should undergo bone investigations and be treated with bone protecting agents. Disease-modifying anti-rheumatic drugs lowering ACPA titer might have positive effects on systemic bone mass.
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Metadaten
Titel
Titer-Dependent Effect of Anti-Citrullinated Protein Antibodies On Systemic Bone Mass in Rheumatoid Arthritis Patients
verfasst von
Giovanni Orsolini
Cristian Caimmi
Ombretta Viapiana
Luca Idolazzi
Elena Fracassi
Davide Gatti
Giovanni Adami
Maurizio Rossini
Publikationsdatum
28.02.2017
Verlag
Springer US
Erschienen in
Calcified Tissue International / Ausgabe 1/2017
Print ISSN: 0171-967X
Elektronische ISSN: 1432-0827
DOI
https://doi.org/10.1007/s00223-017-0253-8

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