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Clinical and Translational Oncology

, Volume 15, Issue 7, pp 563–568 | Cite as

Altered expression of piRNAs and their relation with clinicopathologic features of breast cancer

  • G. Huang
  • H. Hu
  • X. Xue
  • S. Shen
  • E. Gao
  • G. Guo
  • X. Shen
  • X. Zhang
Research Article

Abstract

Introduction

PIWI interacting RNAs (piRNAs) are endogenous regulatory non-coding RNAs which are generally expressed in the germline across animal species. The expressions of piRNAs in tumor tissue were rarely reported until now. The aim of this study was to investigate the expression of piRNAs in breast cancer.

Materials and methods

Deep sequencing was carried out in four tumor and four matched non-tumor tissues from resected breast cancer cases to screen out differentially expressed piRNAs. Furthermore, the result was evaluated by real-time reverse transcription-polymerase chain reaction (RT-PCR) technology in 50 patients with breast cancer and the piRNA expression levels were correlated with clinicopathologic features.

Results

Through deep sequencing, six differentially expressed piRNAs were screened out (5 up- and 1 down-regulated) in the four tumor tissues compared with matched non-tumor tissues. Among them, 4 piRNAs (piR-4987, piR-20365, piR-20485 and piR-20582) were confirmed to be up-regulated by realtime RT-PCR in 50 breast cancer (P < 0.001). Moreover, up-regulated piR-4987 expression was associated with lymph node positivity (P = 0.001).

Conclusions

PiRNAs might play a role in breast cancer and act as tumor markers.

Keywords

PiRNA Deep sequencing Biomarker Breast cancer Non-coding RNA Carcinogenesis 

Notes

Acknowledgments

This work was supported by Wenzhou Science and Technology Bureau (Grant numbers Y20100008, Y20080081) and Health Bureau of Zhejiang Province (Grant number 2009B106).

Conflict of interest

The authors have declared no conflict of interest.

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Copyright information

© Federación de Sociedades Españolas de Oncología (FESEO) 2012

Authors and Affiliations

  • G. Huang
    • 1
  • H. Hu
    • 1
  • X. Xue
    • 2
  • S. Shen
    • 3
  • E. Gao
    • 1
  • G. Guo
    • 1
  • X. Shen
    • 4
  • X. Zhang
    • 1
  1. 1.Department of OncologyThe First Affiliated Hospital of Wenzhou Medical CollegeWenzhouChina
  2. 2.Department of Microbiology and ImmunologyWenzhou Medical CollegeWenzhouChina
  3. 3.Department of General SurgeryThe Integration of Traditional Chinese and Western Medicine of WenzhouWenzhouChina
  4. 4.Department of General SurgeryThe First Affiliated Hospital of Wenzhou Medical CollegeWenzhouChina

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