Dysregulation of miRNAs and their potential as biomarkers for the diagnosis of gastric cancer

Guo,Bo; Li,Jie; Liu,Liying; Hou,Ni; Chang,Dongmin; Zhao,Lingyu; Li,Zongfang; Song,Tusheng; Huang,Chen

doi:10.3892/br.2013.175

Dysregulation of miRNAs and their potential as biomarkers for the diagnosis of gastric cancer

Authors:
- Bo Guo
- Jie Li
- Liying Liu
- Ni Hou
- Dongmin Chang
- Lingyu Zhao
- Zongfang Li
- Tusheng Song
- Chen Huang
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Affiliations: Department of Genetics and Molecular Biology, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Medical College, Xi'an Jiaotong University, Xi'an, P.R. China, The Second Affiliated Hospital of Shaanxi University of Traditional Chinese Medicine, Xianyang, P.R. China, Department of Tumor Surgery, the First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Engineering Research Center of Biotherapy and Translational Medicine of Shaanxi, Xi'an, Shaanxi, P.R. China
Published online on: September 25, 2013 https://doi.org/10.3892/br.2013.175
Pages: 907-912

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Abstract

Recent studies demonstrated that microRNA (miRNA) expression is dysregulated in numerous human cancers. In this study, we investigated the expression patterns of 8 miRNAs in gastric cancer and evaluated their clinical significance in order to identify potential biomarkers for gastric cancer diagnosis. Total RNA was extracted from gastric cancer and normal tissues from 20 pairs of paraffin‑embedded specimens. The expression levels of the miRNAs were detected by quantitative reverse transcriptase polymerase chain reaction using specific stem‑loop primers, with U6 as the internal reference gene. the association between miRNA expression level and clinicopathological factors was investigated. The expression of miR‑21, ‑103, ‑106a, ‑221 and ‑222 in gastric cancer samples was significantly higher compared to that in the paired normal samples. Conversely, the expression of miR‑143 and ‑195 in cancer tissues was significantly lower compared to that in normal tissues. However, miR‑126 exhibited no difference between gastric cancer and normal tissues. A multivariate analysis demonstrated that the expression of miR‑143 and ‑195 were associated with clinicopathological parameters, including depth of invasion and lymph node metastasis. This association may be applicable to future decisions regarding treatment or as a diagnostic biomarker.

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