Esophageal cancer is the ninth leading cause of cancer death in Taiwan. Esophageal squamous cell carcinoma (ESCC) is usually managed with combined modalities, but the prognosis for ESCC patients is still dismal. MicroRNAs (miRNAs) have been implicated in a variety of human cancers progression, and their expression signatures can provide insight into the diagnosis and prognosis of human cancers. However, the dysregulated miRNAs promoted tumor progression in ESCC remain unclear. To address this goal, 1097 miRNAs were analyzed in nine pairs of ESCC and corresponding normal parts with microarray. Tumor suppressive miRNA, miR-193a-5p, was characterized and inversely correlated with poor prognosis of ESCC patients. Manipulating miR-193a-5p in ESCC cell lines and mouse tumor model, the cell proliferation was decreased and the radio-sensitivity was increased. We further used reporter assay to identify ERBB2 as the target of miR-193a-5p. Restored the ERBB2 expression abolished the effects of miR-193a-5p on cell proliferation and radio-sensitivity. These results indicated that miR-193a-5p played a tumor suppressive role through suppressing ERBB2, expression in esophageal squamous cell carcinoma.

Key words: miR-193a-5p, esophageal squamous cell carcinoma, radiotherapy

Note: This abstract was not presented at the meeting.

Citation Format: Pei-Jung Lu. MicroRNA-193a-5p suppresses tumor proliferation and enhances radio-sensitivity through ERBB2 in esophageal squamous cell carcinoma. [abstract]. In: Proceedings of the 105th Annual Meeting of the American Association for Cancer Research; 2014 Apr 5-9; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2014;74(19 Suppl):Abstract nr 5209. doi:10.1158/1538-7445.AM2014-5209