Upregulation of OGT by Caveolin-1 Promotes Mouse Hepatocellular Carcinoma Cells Migration and Invasion / 中国生物化学与分子生物学报

ABSTRACT

Caveolin-1 (Cav-1), a major structural protein of caveolae, is implicated in the vesicular uptake processes of transcytosis and cell signaling. However, its role in modulating protein glycosylation and tumor metastasis remains to be further elucidated. In the present study, it was shown that Cav-1 promotes the expression of O-GlcNAcylation and O-GlcNAc transferase (OGT), and triggers the invasion and metastasis of hepatocellular carcinoma (HCC) cells. The results of RT-qPCR, Western blot and dual lucif-erase reporter assay showed that Cav-1 negatively regulated the expression of transcription factor RUNX2 in HCC. Subsequently, this results in attenuate RUNX2-induced transcription of miR24. miR24 suppresses mouse HCC cells invasion and metastasis via directly targeting Ogt mRNA 3′UTR. This research provides evidence of Cav-1-mediated OGT expression and O-GlcNAc (O-linked N-acetylglucosamine) elevation. These data give insight into a novel mechanism of HCC occurrence and development.