Suppression of inhibits malignant proliferation of human papillary thyroid carcinoma cell.

Papillary thyroid carcinoma (PTC) is the most frequently occurring subtype of thyroid cancer. A certain portion of PTCs can progress to recurrent metastatic cancer. Currently, there remains no effective molecular target therapy for PTCs. As a subunit of the chaperonin containing TCP1 (CCT) complex, is involved in various biological processes. has been reported to drive the proliferation of hepatocellular carcinoma cells. Nevertheless, it remains unknown whether regulates the development of PTC. The present study examined CCT3 protein expression in 30 PTC samples from patients undergoing thyroidectomy. A significant increase was observed in CCT3 expression in the PTC samples compared with the matched adjacent normal thyroid tissues. Lentiviral-mediated small interfering RNAs were used to knock down in K1 cells. It was observed that the expression of was significantly suppressed in K1 cells infected with lentivirus containing a -targeting short hairpin RNA. Our results showed that knockdown markedly decreased the proliferation and cell cycle progression of K1 cells. In addition, the knockdown of induced apoptosis of K1 cell. Taken together, the findings of the present study indicated that CCT3 presents as a potential molecular marker of PTC and regulates the development of PTC in humans.