Abstract
Papillary thyroid carcinoma (PTC) is the common subtype of thyroid cancer, which is a common endocrine malignancy. Tripartite motif 26 (TRIM26) has been found to act as a tumor suppressor in several cancers. However, the functional roles of TRIM26 in PTC remain unknown. In this study, we examined the TRIM26 expression in PTC and evaluated the effects of TRIM26 on proliferation, metastasis, and glycolysis in PTC cells. The results proved that TRIM26 was significantly downregulated in PTC tissues and cell lines. TRIM26 overexpression inhibited cell proliferation, migration, and invasion in PTC cells. TRIM26 overexpression also suppressed the epithelial-to-mesenchymal transitionprocess. Besides, overexpression of TRIM26 caused significant decrease in glucose uptake and lactate production in PTC cells. Further investigations revealed that TRIM26 overexpression inhibited the activation of PI3K/Akt pathway. Treatment with an activator (740Y-P) of the PI3K/AKT pathway reversed the antitumor effects of TRIM26 on PTC cells. These findings provided evidence that TRIM26 acted as a tumor suppressor in PTC.
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