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Aberrant Expression of miR-203 and Its Clinical Significance in Gastric and Colorectal Cancers

  • Original Article
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Journal of Gastrointestinal Surgery Aims and scope

Abstract

Background

MicroRNAs (miRNAs) are small, non-coding RNAs of endogenous origin, they have been increasingly shown to have aberrant expression in many tumor types. miR-203 has not been comprehensively investigated in gastric and colorectal cancers.

Methods

Total RNA was extracted from tissues of 212 patients with gastric or colorectal cancer as well as from seven gastric and colorectal cell lines. We determined the expression of miR-203 by real-time PCR and calculated using the \( {{2}^{ - }}^{{\Delta \Delta Ct}} \) method. Then, we assessed miR-203 expression and clinicopathologic characteristics. Finally, we studied the effect of miR-203 on cell proliferation in SGC-7901 cells by MTT.

Results

miR-203 has significantly low expression in colorectal cancer tissues (p < 0.001, paired t test) and cancer cell lines compared to non-tumor counterparts. Moreover, low expression of miR-203 was correlated with tumor size (p = 0.015, non-parametric test) and pT stage (p = 0.005) in colorectal cancer. Although expression of miR-203 was not significant in gastric cancer tissues (p = 0.124), interestingly, miR-203 was correlated with tumor size (p = 0.023), macroscopic type (p = 0.045), and pT stage (p = 0.013). Furthermore, we found miR-203 can inhibit the cell proliferation in SGC-7901 cells.

Conclusion

miR-203 may be related to the proliferation and invasion of gastric and colorectal cancers.

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Acknowledgment

This work was supported by National Science Foundation of China (nos. 30772137 and 30972879) and Specialized Research Fund for the Doctoral Program of Higher Education (no. 200801590006).

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Authors and Affiliations

  1. Department of Surgical Oncology and General Surgery, First Hospital of China Medical University, Shenyang, 110001, People’s Republic of China

    Yeunpo Chiang, Yongxi Song, Zhenning Wang, Yue Chen, Zhenyu Yue, Huimian Xu, Chengzhong Xing & Zhuangkai Liu

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  1. Yeunpo Chiang
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  2. Yongxi Song
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Correspondence to Zhenning Wang.

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Yeunpo Chiang and Yongxi Song contributed equally to this work.

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Chiang, Y., Song, Y., Wang, Z. et al. Aberrant Expression of miR-203 and Its Clinical Significance in Gastric and Colorectal Cancers. J Gastrointest Surg 15, 63–70 (2011). https://doi.org/10.1007/s11605-010-1367-8

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  • DOI: https://doi.org/10.1007/s11605-010-1367-8

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