Abstract
Objective: Yes-associated protein 1 (YAP1) regulates cell proliferation and apoptosis. Abnormal miR-375 level was related to thyroid cancer. Software predicted a relationship between miR-375 and YAP1. Our study investigated whether miR-375 regulates YAP1 expression and affects thyroid cancer cells. Methods: The tumor tissues and adjacent tissues of thyroid cancer patients were collected to measure miR-375 and YAP1 expression. The dual luciferase reporter experiment verified the regulation between miR-375 and YAP1. Thyroid cancer cell line B-CPAP and TPC-1 cells were divided into miR-NC group and miR-375 mimic group followed by analysis of cell proliferation by flow cytometry, caspase-3 activity, and cell clone formation ability by plate cloning assay. Results: Compared with adjacent cancer tissues, miR-375 in thyroid cancer tissues was decreased and YAP1 was increased. miR-375 targets YAP1. Compared with Nthy-ori 3-1 cells, miR-375 in B-CPAP and TPC-1 cells was significantly reduced and YAP1 was increased. Transfection with miR-375 mimic significantly inhibited cell proliferation, increase caspase-3 activity, and reduced the ability of cells to form clones. Conclusion: miR-375 can inhibit YAP1 expression, decrease the proliferation of thyroid cancer cells, induce cell apoptosis, and reduce clone formation.
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