MicroRNAs in esophageal cancer (review).

Esophageal cancer (EC) is one of the most common malignant tumors worldwide. EC is usually diagnosed at a locally advanced stage or at a stage with involvement of lymph nodes. Despite aggressive treatment, the overall five-year survival rate remains poor. microRNAs (miRNAs) are small, non-coding endogenous RNAs that negatively regulate gene expression at the post-transcriptional and/or translational level. Accumulating evidence suggests that the deregulation of miRNAs not only results in cancer progression, but also directly promotes tumor initiation. Previous studies found that miRNAs are frequently deregulated in EC, indicating that miRNAs are important in tumorigenesis. In this review, we summarize therecently recognized miRNA expression and its impact on the biology of EC and the potential applications for EC.

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