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Dickkopf-1 as Potential Biomarker to Evaluate Bone Erosion in Systemic Lupus Erythematosus

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Abstract

Objective

This study aims to explore the potential role of circulating Dickkopf-1 (Dkk-1) and osteoprotegerin (OPG) in evaluating erosive arthritis in systemic lupus erythematosus (SLE).

Methods

Serum Dkk-1 and OPG levels were examined in 130 SLE patients including eight with erosive arthritis, 100 rheumatoid arthritis (RA) patients and 50 healthy individuals by ELISA. Comparison of serum Dkk-1 levels with presence of anti-cyclic citrullinated peptides (CCP) antibodies in evaluating erosive arthritis in SLE was carried out. Associations of Dkk-1 and OPG levels with results of clinical examination were also noted.

Results

Dkk-1 levels were significantly increased in eight SLE patients with erosive arthritis, compared to 58 SLE patients with non-erosive arthritis, 64 SLE patients without arthritis, and healthy controls, while similar with RA. In contrast, no significant changes of OPG levels were found except for higher levels in RA. No differences were found in Dkk-1 levels of SLE patients with erosive arthritis subdivided according to presence or absence of anti-CCP antibodies. Moreover, higher levels of Dkk-1 were identified in anti-CCP positive SLE patients with erosive arthritis compared to those with non-erosive arthritis or without arthritis. However, no significant correlations between Dkk-1 and OPG levels or between Dkk-1 levels and other laboratory and clinical manifestations were observed.

Conclusions

High levels of circulating Dkk-1 were associated with bone erosion in patients with SLE, even when anti-CCP antibodies were absent.

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Acknowledgments

This work was supported by the National High Technology Research and Development Program of China (2006AA02Z495), and the Natural Science Foundation of Beijing (7072065).

Conflict-of-interest disclosure

The authors declare no competing financial interests.

Author information

Authors and Affiliations

  1. Department of Rheumatology and Immunology, Peking University People’s Hospital, 11 Xizhimen South Street, Beijing, 100044, China

    Li Long, Yanying Liu, Shiyao Wang, Jianping Guo, Ping Yu & Zhanguo Li

  2. Department of Rheumatology and Allergy, Capital Medical University Xuanwu Hospital, Beijing, China

    Yi Zhao

  3. Department of Rheumatology and Immunology, Affiliated Kailuan Hospital, North China Coal Medical University, Tangshan, China

    Ping Yu

Authors
  1. Li Long
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  2. Yanying Liu
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  3. Shiyao Wang
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  4. Yi Zhao
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  5. Jianping Guo
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  6. Ping Yu
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  7. Zhanguo Li
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Corresponding author

Correspondence to Zhanguo Li.

Additional information

Li Long and Yanying Liu authors contributed equally to this work

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Long, L., Liu, Y., Wang, S. et al. Dickkopf-1 as Potential Biomarker to Evaluate Bone Erosion in Systemic Lupus Erythematosus. J Clin Immunol 30, 669–675 (2010). https://doi.org/10.1007/s10875-010-9436-z

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  • DOI: https://doi.org/10.1007/s10875-010-9436-z

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