AI Article Synopsis

  • miR-203 is significantly reduced in esophageal cancer cells, and its overexpression leads to increased cell death (apoptosis) and decreased tumor growth and invasion.
  • Overexpression of miR-203 also lowers the levels of miR-21, which is involved in cancer progression.
  • The small GTPase Ran is identified as a target gene of miR-203, and restoring Ran levels can partly reverse the tumor-suppressing effects of miR-203 while increasing miR-21 expression.

Article Abstract

The expression of miR-203 has been reported to be significantly down-regulated in esophageal cancer. We showed here that overexpression of miR-203 in esophageal cancer cells dramatically increased cell apoptosis and inhibited cell proliferation, migration and invasion as well as tumor growth and down-regulated miR-21 expression. We subsequently identified that small GTPase Ran was a target gene of miR-203. Furthermore, Ran restoration partially counteracted the tumor suppressive effects of miR-203 and increased miR-21 expression. Taken together, our findings suggest that miR-203 may act as novel tumor suppressor in esophageal cancer through down-regulating the expression of Ran and miR-21.

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http://dx.doi.org/10.1016/j.canlet.2013.08.037DOI Listing

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