[No authors listed]
Several microRNAs (miRNAs) are known as regulatory molecules involved in gastric tumor metastasis. The expression of miRâ337â3p was revealed to be downregulated in metastatic gastric tumor cells. Overexpression of miRâ337â3p in gastric cancer cells resulted in the reduction of their invasive abilities. To characterize the functions of miRâ337â3p, miRâ337â3p was expressed in a metastatic lymph nodeâderived gastric tumor cell line, SGCâ7901. Overexpression of miRâ337â3p reduced the viability of cells but had no effects on the cell cycle. Wound healing and Transwell migration assays revealed that miRâ337â3p inhibited the migration capacity of cells. miRâ337â3p was capable of binding to the 3'âuntranslated region of a cytoskeletonâassociated molecule, ARHGAP10. Overexpression of miRâ337â3p reduced the mRNA and protein levels of ARHGAP10 and the coâexpression of ARHGAP10 and miRâ337â3p resulted in the recovery of cell migration capacity. Furthermore, the injection of miRâ337â3pâoverexpressing SGCâ7901 cells into an immunodeficient mouse model resulted in a decrease in tumor metastasis in the liver and lungs. The present results indicated that miRâ337â3p regulates gastric tumor metastasis by targeting the cytoskeletonâassociated protein ARHGAP10.
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