Abstract:
BACKGROUND:Esophageal epithelial microRNAs may be used to diagnose Barrett's esophagus (BE) and possibly monitor its progression to esophageal adenocarcinoma (EAC). AIMS:We reviewed studies that have investigated this to identify microRNAs with high biomarker potential for screening and disease monitoring in BE. METHODS:PubMed and EMBASE databases were searched for studies that quantified esophageal epithelial microRNAs. Publications reporting microRNA comparisons of normal, non-dysplastic BE, BE with high-grade dysplasia (HGD), and EAC tissues using both unbiased discovery and independent validation phases were reviewed. RESULTS:Eleven studies on microRNA expression differences between normal epithelium and non-dysplastic BE (seven studies), HGD (4) or EAC (7), or between non-dysplastic BE and HGD (3) or EAC (6) were identified, and the findings of their validation phase were analyzed. Increased miR-192, -194, and -215, and reduced miR-203 and -205 expression in BE compared to normal was noticed by all 4-6 of the seven studies that examined these microRNAs. In heterogeneity tests of the reported fold-change values, the I (2) statistics were 7.9-17.1 % (all P < 0.05). Elevated miR-192, -194, and -215, and diminished miR-203 and -205 levels were also noted for comparisons of HGD or EAC against normal. In contrast, a consistent microRNA expression difference was absent for the comparisons of HGD or EAC against BE. CONCLUSIONS:MicroRNAs miR-192, -194, -203, -205, and -215 are promising tissue biomarkers for diagnosing BE. Cross-sectional data suggest that microRNAs may have a limited role in separating BE from HGD/EAC epithelia but need further testing in longitudinal follow-up studies.
journal_name
Dig Dis Scijournal_title
Digestive diseases and sciencesauthors
Mallick R,Patnaik SK,Wani S,Bansal Adoi
10.1007/s10620-015-3959-3subject
Has Abstractpub_date
2016-04-01 00:00:00pages
1039-50issue
4eissn
0163-2116issn
1573-2568pii
10.1007/s10620-015-3959-3journal_volume
61pub_type
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