Overexpression of miR-196b and HOXA10 characterize a poor-prognosis gastric cancer subtype

Jae Yun Lim, Sun Och Yoon, So Young Seol, Soon Won Hong, Jong Won Kim, Seung Ho Choi, Ju Seog Lee, Jae Yong Cho

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44 Citations (Scopus)

Abstract

AIM: To identify molecular biologic differences between two gastric adenocarcinoma subgroups presenting different prognoses through the analysis of microRNA and protein expression. METHODS: Array technologies were used to generate 1146 microRNAs and 124 proteins expression profiles of samples from 60 patients with gastric cancer. For the integrative analysis, we used established mRNA expression data published in our previous study. Whole mRNA expression levels were acquired from microarray data for 60 identical gastric cancer patients. Two gastric adenocarcinoma subgroups with distinct mRNA expression profiles presented distinctly different prognoses. MicroRNA and protein expression patterns were compared between gastric cancer tissue and normal gastric tissue and between two different prognostic groups. Aberrantly expressed microRNA, associated mRNA, and protein in patients with poor-prognosis gastric cancer were validated by quantitative reverse transcription polymerase chain reaction and immunochemistry in independent patients. RESULTS: We obtained the expression data of 1146 microRNAs and 124 cancer-related proteins. Four microRNAs were aberrantly expressed in the two prognostic groups and in cancer vs non-cancer tissues (P < 0.05). In the poor-prognosis group, miR-196b, miR- 135b, and miR-93 were up-regulated and miR-29c* was down-regulated. miR-196b expression positively correlated with Homeobox A10 (HOXA10) expression (r = 0.726, P < 0.001), which was significantly increased in poor-prognosis patients (P < 0.001). Comparing gastric cancer with non-cancer tissues, 46/124 proteins showed differential expression (P < 0.05); COX2 (P < 0.001) and cyclin B1 (P = 0.017) were clearly overexpressed in the poor-prognosis group. CONCLUSION: Co-activation of miR-196b and HOXA10 characterized a poor-prognosis subgroup of patients with gastric cancer. Elucidation of the biologic function of miR-196b and HOXA10 is warranted.

Original languageEnglish
Pages (from-to)7078-7088
Number of pages11
JournalWorld Journal of Gastroenterology
Volume19
Issue number41
DOIs
Publication statusPublished - 2013 Nov 7

All Science Journal Classification (ASJC) codes

  • Gastroenterology

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    Lim, J. Y., Yoon, S. O., Seol, S. Y., Hong, S. W., Kim, J. W., Choi, S. H., Lee, J. S., & Cho, J. Y. (2013). Overexpression of miR-196b and HOXA10 characterize a poor-prognosis gastric cancer subtype. World Journal of Gastroenterology, 19(41), 7078-7088. https://doi.org/10.3748/wjg.v19.i41.7078