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Discovery of serum protein biomarkers in rheumatoid arthritis using MALDI-TOF-MS combined with magnetic beads

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Abstract

The aim of this study was to discover potential biomarkers for rheumatoid arthritis (RA) using Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry combined with magnetic beads. Proteomic fingerprint technology combining magnetic beads with MALDI-TOF-MS was used to profile and compare the proteomes in serum samples from 60 patients with RA, 35 patients with osteoarthritis and 36 healthy controls. The proteomic pattern associated with RA was identified by Biomarker Patterns Software. Model of biomarkers was constructed and evaluated through the Biomarker Patterns Software. A total of 33 discriminative peaks were identified to be related with RA, in which the 5 peaks with the mass–charge ratio (m/z) peaks at 15,715.5, 7,771.4, 8,959.4, 8,469.8 and 8,710.8 Da were used to construct a model for the diagnosis of RA by pattern recognition software. The blind testing data indicated a sensitivity of 86.7% and a specificity of 90.0% in RA diagnosis. These results demonstrated that potential protein biomarkers for RA could be discovered in serum by MALDI-TOF-MS combined with WCX magnetic beads. The diagnosis mode tree based on the five candidate biomarkers could provide a powerful and reliable diagnostic method for RA with high sensitivity and specificity.

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Acknowledgments

Supported by grant 2007B225 from Medical Technology Program of Zhejiang and grant 2010C33001 from Science Technology of Zhejiang Province.

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None.

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Authors and Affiliations

  1. Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province, Affiliated Hospital of Wenzhou Medical College, Taizhou, Zhejiang Province, China

    Xiaoxue Zhang, Zhaolin Yuan, Bo Shen, Min Zhu & Wei Xu

  2. Department of Clinical Laboratory, Taizhou Municipal Hospital, Taizhou, Zhejiang Province, China

    Chibo Liu

Authors
  1. Xiaoxue Zhang
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  2. Zhaolin Yuan
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  3. Bo Shen
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  4. Min Zhu
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  5. Chibo Liu
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  6. Wei Xu
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Corresponding authors

Correspondence to Bo Shen or Chibo Liu.

Additional information

Xiaoxue Zhang and Bo Shen equally contribute to the work as first coauthors.

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Zhang, X., Yuan, Z., Shen, B. et al. Discovery of serum protein biomarkers in rheumatoid arthritis using MALDI-TOF-MS combined with magnetic beads. Clin Exp Med 12, 145–151 (2012). https://doi.org/10.1007/s10238-011-0154-5

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  • DOI: https://doi.org/10.1007/s10238-011-0154-5

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