The expression of microRNA 574-3p as a predictor of postoperative outcome in patients with esophageal squamous cell carcinoma

Despite advances in radical esophagectomies and adjuvant therapy, the postoperative prognosis in esophageal squamous cell carcinoma (ESCC) patients remains poor. The aim of this study was to identify a molecular signature to predict postoperative favorable outcomes in patients with ESCC. As a traini...

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Published in:	World journal of surgical oncology Vol. 14; no. 1; p. 228
Main Authors:	Okumura, Tomoyuki, Kojima, Hirohumi, Miwa, Takeshi, Sekine, Shinichi, Hashimoto, Isaya, Hojo, Shozo, Nagata, Takuya, Shimada, Yutaka
Format:	Journal Article
Language:	English
Published:	England BioMed Central Ltd 26-08-2016 BioMed Central
Subjects:	Aged Analysis Biomarkers, Tumor - metabolism Carcinoma, Squamous Cell - diagnosis Carcinoma, Squamous Cell - mortality Carcinoma, Squamous Cell - surgery Care and treatment Complications and side effects Disease-Free Survival Esophageal Neoplasms - diagnosis Esophageal Neoplasms - mortality Esophageal Neoplasms - surgery Esophageal Squamous Cell Carcinoma Esophagectomy Female Gene expression Gene Expression Profiling Genes, Tumor Suppressor Humans Influence Male MicroRNA MicroRNAs - metabolism Middle Aged Neoplasm Recurrence, Local - diagnosis Oligonucleotide Array Sequence Analysis Prognosis Real-Time Polymerase Chain Reaction Squamous cell carcinoma Treatment Outcome miRNA Squamous cell carcinoma Surgery Esophageal cancer Prognostic marker
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Summary:	Despite advances in radical esophagectomies and adjuvant therapy, the postoperative prognosis in esophageal squamous cell carcinoma (ESCC) patients remains poor. The aim of this study was to identify a molecular signature to predict postoperative favorable outcomes in patients with ESCC. As a training data set, total RNA was extracted from formalin-fixed paraffin-embedded samples of surgically removed specimens from 19 ESCC patients who underwent curative esophagectomy. The expression of microRNA (miRNA) was detected using a miRNA oligo chip on which 885 genes were mounted. As a validation data set, we obtained frozen samples of surgically resected tumors from 12 independent ESCC patients and the expression of miR-574-3p was detected by quantitative real-time PCR. Our microarray analysis in the training set patients identified three miRNAs (miR-574-3p, miR-106b, and miR-1303) and five miRNAs (miR-1203, miR-1909, miR-204, miR-371-3p, miR-886-3p) which were differentially expressed between the patients with (n = 14) and without (n = 5) postoperative tumor relapse (p < 0.01 and p < 0.05, respectively). Higher expression of miR-574-3p, which showed the most significant association with non-relapse (p = 0.001), was associated with favorable overall survival (p = 0.016). Real-time PCR experiments on the validation set patients confirmed that higher expression of miR-574-3p was associated with non-tumor relapse (p = 0.029) and better overall survival (p = 0.004). Our results suggest that the aberrant expression of the miRNAs identified in this study plays key roles in the progression of ESCC. miR-574-3p was suggested to have a tumor suppressor effect, and thus, to be a predictor of postoperative outcome in patients with ESCC.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1477-7819 1477-7819
DOI:	10.1186/s12957-016-0985-3