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A Rapid Sample Pretreatment Protocol: Improved Sensitivity in the Detection of a Low-abundant Serum Biomarker for Prostate Cancer

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Abstract

We have developed a rapid immunoglobulin G (IgG) and a human serum albumin (HSA) depletion protocol. We depleted both HSA and IgG (> 97%) separately, and in a single procedure. The method is specific and reproducible (RSD < 1.0%), and substantially lowered the detection limit of prostate-specific antigen, a prostate cancer biomarker. The method can be applied to other biomarkers and proteomic studies. Interestingly, the depletion of HSA might not be blankly as beneficial as widely portrayed. Our study suggests the depletion of IgG to be more beneficial than albumin depletion.

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Authors and Affiliations

  1. School of Material Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan

    Mun’delanji Vestergaard

  2. Department of Applied Physics, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan

    Eiichi Tamiya

Authors
  1. Mun’delanji Vestergaard
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  2. Eiichi Tamiya
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Correspondence to Mun’delanji Vestergaard.

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Vestergaard, M., Tamiya, E. A Rapid Sample Pretreatment Protocol: Improved Sensitivity in the Detection of a Low-abundant Serum Biomarker for Prostate Cancer. ANAL. SCI. 23, 1443–1446 (2007). https://doi.org/10.2116/analsci.23.1443

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  • DOI: https://doi.org/10.2116/analsci.23.1443

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