MicroRNA-132 (niiR-132) has been demonstrated to be a tumor suppressor in several types of tumors. However, the expression and the role of miR-132 in human thyroid cancer are still poorly understood. The aim of the present study was to examine the potential roles and molecular mechanism of miR-132 in thyroid cancer. We found that miR-132 expression levels were significantly downregulated in thyroid cancer tissues and cell lines. Function assays showed that overexpression of miR-132 in TPC1 cells inhibited cell proliferation, migration, and invasion. Forkhead box protein Al (FOXA1) was identified as a direct target of miR-132 in thyroid cancer cells. Knockdown of FOXA1 in TPC1 cells significantly inhibited cell proliferation, migration, and invasion, which mimicked the suppressive effect induced by miR-132 overexpression. Restoration of FOXA1 expression partially reversed the suppressive effect induced by miR-132 overexpression. Taken together, these results suggested that niiR-132 acts as a tumor suppressor in thyroid cancer through targeting FOXA1.
[1]Jilin Univ, Hosp 1, Dept Radiol, 71 Xinmin St, Changchun 130021, Jilin, Peoples R China.
[2]Jilin Univ, China Japan Union Hosp, Changchun, Jilin, Peoples R China.
(8.0+极速模式)