Metastasis is frequently observed in human follicular thyroid carcinoma. The present study investigated the peroxisome proliferator-activated receptor γ agonist, 15-deoxy-Δ-prostaglandin J (15d-PGJ), and its effect on the migration of CGTH W-2 human thyroid carcinoma cells. 15d-PGJ decreased the survival rate of CGTH W-2 cells in a dose-dependent manner. The Transwell migration assay demonstrated that 15d-PGJ reduced the migration rate of CGTH W-2 cells by 35% following treatment with 30 µM 15d-PGJ compared with control cells. The cell adhesion assay indicated that, following 15d-PGJ treatment for 24 h, cell adhesion decreased by 26% compared with the control group. The expression levels of focal adhesion proteins, including integrin β1, phospho-focal adhesion kinase and p-paxillin, were downregulated following treatment with 15d-PGJ. Immunostaining revealed that the puncta of vinculin were reduced and the actin stress fiber was disassembled following 15d-PGJ treatment. By contrast, p120-catenin (p120-ctn) and β-catenin levels staining accumulated in the region of the lamellipodium following 15d-PGJ treatment. Membrane fractionation revealed that p120-ctn and N-cadherin were decreased in the cell membrane, but increased in the cytoplasm of 15d-PGJ-treated cells. Therefore, 15d-PGJ inhibited human thyroid carcinoma cell migration and this may be due to the impairment of focal adhesion complexes and the accumulation of p120-ctn in the cytoplasm in the region of the lamellipodium.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5403263PMC
http://dx.doi.org/10.3892/ol.2017.5773DOI Listing

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