Journal
JOURNAL OF CELLULAR BIOCHEMISTRY
Volume 119, Issue 11, Pages 9583-9590Publisher
WILEY
DOI: 10.1002/jcb.27276
Keywords
long noncoding RNAs (lncRNAs); maternally expressed gene 3; tumor survival
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Funding
- Mashhad University of Medical Sciences [960371, 940937, 961077, 940938]
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Long noncoding RNAs (lncRNAs) play an important role in carcinogenesis and cancer progression. lncRNA maternally expressed gene 3 (MEG3) is a tumor suppressor that is downregulated in several cancers. However, its prognostic value in human malignancies remains controversial. We have therefore undertaken a meta-analysis to explore the relationship between cancer survival and the expression of lncRNA MEG3. A systematic literature search identified 13 potentially eligible investigations comprising 1733 patients in nine different cancer types. In the pooled analysis, a low expression of MEG3 was associated with low overall survival (OS) in patients with cancer having a combined hazard ratio (HR) of 0.830 (HR=0.83; 95% CI: 0.70-0.98; p=0.03; random effect model). However, subgroup analysis according to cancer type revealed that MEG3 expression was not associated with better OS in gastrointestinal cancer (HR=0.58, 95% CI=0.33-1.03; p=0.06), and patients with breast cancer (HR=0.85, 95% CI: 0.12-5.88; p=0.87). In conclusion, our results demonstrate that only in the pooled analysis, there was a significant relationship between MEG3 expression and cancer survival. Further investigation of other molecular biomarkers involved in tumorigenesis-related pathways is necessary.
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