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Overexpression of miR-92a correlates with tumor metastasis and poor prognosis in patients with colorectal cancer

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International Journal of Colorectal Disease Aims and scope Submit manuscript

Abstract

Objectives

MicroRNAs regulate gene expression at the post-transcriptional level and play important roles in cancer development, progression, and metastasis. The aim of this study was to investigate the expression of miR-92a in colorectal cancer and the normal adjacent mucosa and its potential relevance to clinicopathological characteristics and patient survival.

Methods

Surgical specimens of cancer tissue and adjacent normal mucosa were obtained from 82 patients with colorectal carcinomas. The relative expression levels of miR-92a mRNA in the cancer and the normal adjacent mucosa were measured by quantitative real-time reverse transcriptase polymerase chain reaction. We analyzed their correlation with tumor metastasis, clinicopathologic parameters, and clinical outcome.

Results

The relative expression levels of miR-92a were significantly higher in colorectal cancer tissues than in the normal adjacent mucosa (p < 0.001), and a high expression of miR-92a correlated with advanced clinical stage (p = 0.025), lymph node metastases (p = 0.015), and distant metastases (p = 0.046). Kaplan–Meier analysis indicated that patients with high miR-92a expression had a poor overall survival (p = 0.001). Moreover, multivariate analysis showed that increased expression of miR-92a was an independent predictor of overall survival.

Conclusion

This study revealed that miR-92a overexpression was correlated with specific colorectal cancer biopathologic features, such as TNM stage, lymph node and distant metastases, and poor survival of the patients, indicating that miR-92a may serve as a molecular prognostic marker for colorectal cancer and disease progression.

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Acknowledgments

This work was supported by Scientific Research Program of Sichuan Provincial Health Department of China (110319).

Conflict of interest

The authors declare that no conflicts of interest exist.

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Authors and Affiliations

  1. The First Department of General Surgery, The Affiliated Hospital of North Sichuan Medical College, Nanchong, China

    Tong Zhou, Guangjun Zhang, Zuoliang Liu, Shusen Xia & Hongpeng Tian

Authors
  1. Tong Zhou
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  2. Guangjun Zhang
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  3. Zuoliang Liu
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  4. Shusen Xia
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  5. Hongpeng Tian
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Corresponding author

Correspondence to Guangjun Zhang.

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Zhou, T., Zhang, G., Liu, Z. et al. Overexpression of miR-92a correlates with tumor metastasis and poor prognosis in patients with colorectal cancer. Int J Colorectal Dis 28, 19–24 (2013). https://doi.org/10.1007/s00384-012-1528-1

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  • DOI: https://doi.org/10.1007/s00384-012-1528-1

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