Elevated urinary level of vitamin D‑binding protein as a novel biomarker for diabetic nephropathy

  • Authors:
    • Xiao-Qin Tian
    • Li-Min Zhao
    • Jia-Pu Ge
    • Yan Zhang
    • Yan-Cheng Xu
  • View Affiliations

  • Published online on: November 26, 2013     https://doi.org/10.3892/etm.2013.1426
  • Pages: 411-416
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Abstract

Improving the early prediction and detection of diabetic nephropathy (DN) remains a great challenge in disease management. The aim of this study was to evaluate the early detection power of urinary vitamin D‑binding protein (VDBP) for the diagnosis of DN. Urine samples were obtained from 45 healthy volunteers and 105 diabetic patients with normoalbuminuria (DM group), microalbuminuria (DN1 group) and macroalbuminuria (DN2 group) (n=35 per group). The VDBP expression patterns in urine from patients and controls were quantified by western blot analysis. The excretion levels of urinary VDBP were quantified with enzyme-linked immunosorbent assay. The quantification results were obtained by correcting for creatinine expression and showed that urinary VDBP levels were significantly elevated in the patients of the DN1 and DN2 groups compared with those of the DM group and normal controls (1,011.33±325.30 and 1,406.34±239.66 compared with 466.54±213.63 and 125.48±98.27 ng/mg, respectively) (P<0.001). Receiver operating characteristic analysis of urinary VDBP levels for the diagnosis of DN rendered an optimum cut-off value of 552.243 ng/mg corresponding to 92.86% sensitivity and 85.00% specificity, which also showed an area under the ROC curve of 0.966. In conclusion, the findings of the present study suggest that urinary VDBP may be a potential biomarker for the early detection and prevention of DN. Further studies are required to examine the pathogenic mechanisms of elevated VDBP levels and their role in the diagnosis of DN.
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2014-February
Volume 7 Issue 2

Print ISSN: 1792-0981
Online ISSN:1792-1015

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Spandidos Publications style
Tian X, Zhao L, Ge J, Zhang Y and Xu Y: Elevated urinary level of vitamin D‑binding protein as a novel biomarker for diabetic nephropathy. Exp Ther Med 7: 411-416, 2014
APA
Tian, X., Zhao, L., Ge, J., Zhang, Y., & Xu, Y. (2014). Elevated urinary level of vitamin D‑binding protein as a novel biomarker for diabetic nephropathy. Experimental and Therapeutic Medicine, 7, 411-416. https://doi.org/10.3892/etm.2013.1426
MLA
Tian, X., Zhao, L., Ge, J., Zhang, Y., Xu, Y."Elevated urinary level of vitamin D‑binding protein as a novel biomarker for diabetic nephropathy". Experimental and Therapeutic Medicine 7.2 (2014): 411-416.
Chicago
Tian, X., Zhao, L., Ge, J., Zhang, Y., Xu, Y."Elevated urinary level of vitamin D‑binding protein as a novel biomarker for diabetic nephropathy". Experimental and Therapeutic Medicine 7, no. 2 (2014): 411-416. https://doi.org/10.3892/etm.2013.1426