Research Papers:
Analysis of tissue and circulating microRNA expression during metaplastic transformation of the esophagus
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Abstract
Daniela Cabibi1,*, Stefano Caruso2,*, Viviana Bazan2,*, Marta Castiglia2, Giuseppe Bronte2, Sabrina Ingrao1, Daniele Fanale2, Antonina Cangemi2, Valentina Calò2, Angela Listì2, Lorena Incorvaia2, Antonio Galvano2, Gianni Pantuso3, Eugenio Fiorentino3, Sergio Castorina4,#, Antonio Russo2,#
1Department of Science for Promotion of Health and Mother and Child Care, Section of Human Pathology, University of Palermo, 90127 Palermo, Italy
2Department of Surgical, Oncological and Oral Sciences, Section of Medical Oncology, University of Palermo, 90127 Palermo, Italy
3Department of Surgical, Oncological and Oral Sciences, Section of Surgical Oncology, University of Palermo, 90127 Palermo, Italy
4Fondazione Mediterranea "G.B. Morgagni", Department of Biomedical and Biotechnological Sciences, University of Catania, 95100 Catania, Italy
*These authors contributed equally to this work
#Co-last authors, these authors contributed equally to this work
Correspondence to:
Antonio Russo, email: [email protected]
Keywords: microRNA, Barrett’s esophagus, columnar-lined oesophagus, esophagitis, metaplasia
Received: March 24, 2016 Accepted: May 05, 2016 Published: June 25, 2016
ABSTRACT
Genetic changes involved in the metaplastic progression from squamous esophageal mucosa toward Barrett’s metaplasia and adenocarcinoma are almost unknown. Several evidences suggest that some miRNAs are differentially expressed in Barrett’s esophagus (BE) and esophageal adenocarcinoma. Among these, miR-143, miR-145, miR-194, miR-203, miR-205, miR-215 appear to have a key role in metaplasia and neoplastic progression. The aim of this study was to analyze deregulated miRNAs in serum and esophageal mucosal tissue biopsies to identify new biomarkers that could be associated with different stages of esophageal disease. Esophageal mucosal tissue biopsies and blood samples were collected and analyzed for BE diagnosis. Quantitative Real-time PCR was used to compare miRNA expression levels in serum and 60 disease/normal-paired tissues from 30 patients diagnosed with esophagitis, columnar-lined oesophagus (CLO) or BE. MiRNA expression analysis showed that miR-143, miR-145, miR-194 and miR-215 levels were significantly higher, while miR-203 and miR-205 were lower in BE tissues compared with their corresponding normal tissues. Esophageal mucosa analysis of patients with CLO and esophagitis showed that these miRNAs were similarly deregulated but to a lesser extent keeping the same trend and CLO appeared as intermediate step between esophagitis and BE. Analysis on circulating miRNA levels confirmed that miR-194 and miR-215 were significantly upregulated in both BE and CLO compared to esophagitis, while miR-143 was significantly upregulated only in the Barrett group. These findings suggest that miRNAs may be involved in neoplastic/metaplastic progression and miRNA analysis might be useful for progression risk prediction as well as for monitoring of BE/CLO patients.
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