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PLoS One. 2013 Nov 12;8(11):e80426. doi: 10.1371/journal.pone.0080426. eCollection 2013.

Prognostic role of microRNA-21 in colorectal cancer: a meta-analysis.

Author information

1
Department of Radiation Oncology, Nantong Tumor Hospital, Nantong, Jiangsu, China.

Abstract

BACKGROUND:

To date, many studies have shown that microRNAs (miRNA) exhibit altered expression in various cancers and may play an important role as prognostic biomarker of cancers. The present meta-analysis summarizes the recent advances in the use of microRNA-21 (miR-21) in the assessment of colorectal cancer and analyzes the prognostic role of miR-21 for survival outcome.

METHODOLOGY/PRINCIPAL FINDINGS:

The present meta-analysis was performed by searching PubMed through multiple search strategies. Data were extracted from studies comparing overall survival (OS) in patients with colorectal cancer who showed higher expression of miR-21 than similar patients. Pooled hazard ratios (HRs) of miR-21 for survival and 95% confidence intervals (CI) were calculated. Seven studies with a total of 1174 patients were included this meta-analysis. For overall survival (OS), the pooled hazard ratio (HR) of higher miR-21 expression in colorectal cancer was 1.76 (95% CI: 1.34-2.32, P=0.000). After elimination of heterogeneity, the pooled HR was 2.32 (95% CI: 1.82-2.97, P=0.000), which was found to significantly predict poorer survival. The subgroup analysis suggested that elevated miR-21 level and patients' survival correlated with III/IV stage (HR=5.35, 95% CI: 3.73-7.66).

CONCLUSIONS/SIGNIFICANCE:

The present findings suggest that high expression of miR-21 might predict poor prognosis in patients with colorectal cancer.

PMID:
24265822
PMCID:
PMC3827229
DOI:
10.1371/journal.pone.0080426
[Indexed for MEDLINE]
Free PMC Article

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