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Clinical and Experimental Medicine

, Volume 16, Issue 1, pp 29–35 | Cite as

Serum microRNA-21 as a potential diagnostic biomarker for breast cancer: a systematic review and meta-analysis

  • Shichao Li
  • Xiaorong Yang
  • Jinmei Yang
  • Jiesheng Zhen
  • Dechun ZhangEmail author
Original Article

Abstract

Serum microRNA-21 (miR-21) expression has been shown to be significantly up-regulated in breast cancer, which implies that it could be a biomarker to discriminate breast cancer patients from healthy controls. We therefore performed this meta-analysis to assess the diagnostic value of miR-21 for breast cancer. Relevant articles were collected from PubMed, Scopus, Embase, the Cochrane Library, BioMed Central, ISI Web of Knowledge, China National Knowledge Infrastructure, Wan Fang Data and Technology of Chongqing databases, from inception to June 10, 2014 by two independent researchers. Diagnostic capacity of miR-21 for breast cancer was assessed using pooled sensitivity and specificity, diagnostic odds ratio (DOR), area under the summary receiver operating characteristic (AUC) and Fagan’s nomogram. Meta-Disc software and Stata SE 12.0 were used to investigate the source of heterogeneity and to perform the meta-analysis. We used six studies with a total of 438 patients and 228 healthy controls in this meta-analysis. The pooled sensitivity, specificity and DOR were 0.79 [95 % confidence interval (CI) 0.66–0.87], 0.85 (95 % CI 0.75–0.91) and 19.46 (95 % CI 8.74–43.30), respectively; positive and negative likelihood ratios were 5 and 0.25, and AUC was 0.89 (95 % CI 0.86–0.91). In addition, heterogeneity was clearly apparent but was not caused by the threshold effect. This meta-analysis suggests that miR-21 is a potential biomarker for early diagnosis of breast cancer with high sensitivity and specificity, and its clinical application warrants further investigation.

Keywords

Breast cancer miR-21 Diagnosis Meta-analysis 

Notes

Acknowledgments

The authors would like to thank Bin Qin for supporting more datum that not reported in their articles. And thanks to the anonymous reviewers for their suggestions to improve the quality of the paper.

Conflict of interest

We declare that we have no conflict of interest.

Supplementary material

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Supplementary material 1 (TIFF 1724 kb)
10238_2014_332_MOESM2_ESM.doc (36 kb)
Supplementary material 2 (DOC 36 kb)
10238_2014_332_MOESM3_ESM.doc (26 kb)
Supplementary material 3 (DOC 26 kb)

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Copyright information

© Springer-Verlag Italia 2014

Authors and Affiliations

  • Shichao Li
    • 1
  • Xiaorong Yang
    • 1
  • Jinmei Yang
    • 1
  • Jiesheng Zhen
    • 2
  • Dechun Zhang
    • 1
    Email author
  1. 1.Department of Pathogenic Biology, Molecular Oncology LaboratoryChongqing Medical UniversityChongqingPeople’s Republic of China
  2. 2.Clinical LaboratoryRenmin Hospital of WuHan UniversityWuhanPeople’s Republic of China

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