FUT2 inhibits the EMT and metastasis of colorectal cancer by increasing LRP1 fucosylation

Background Fucosyltransferase 2(FUT2) and its induced a-1,2 fucosylation is associated with cancer metastasis. However, the role of FUT2 in colorectal cancer (CRC) metastasis remains unclear. Methods The expression levels and clinical analyses of FUT2 were assessed in CRC samples. Migration and invasion assays, EMT detection, nude mice peritoneal dissemination models and intestinal specific FUT2 knockout mice -(FUT2(Delta IEC) mice) were used to investigate the effect of FUT2 on metastasis in colorectal cancer. Quantitative proteomics study of glycosylated protein, UEA enrichment, Co-immunoprecipitation identified the mediator of the invasiveinhibiting effects of FUT2. Results FUT2 is downregulated in CRC tissues and is positively correlated with the survival of CRC patients. FUT2 is an inhibitor of colorectal cancer metastasis which, when overexpressed, suppresses invasion and tumor dissemination in vitro and in vivo. FUT2 knock- out mice -(FUT2(Delta IEC) mice) develop AMO and DSS-induced tumors and promote EMT in colorectal cancers. FUT2-induced alpha-1,2 fucosylation impacts the ability of low-density lipoprotein receptor-related protein 1(LRP1) to suppress colorectal cancer invasion. Conclusions Our study demonstrated that FUT2 induces alpha-1,2 fucosylation and inhibits EMT and metastasis of colorectal cancer through LRP1 fucosylation, suggesting that FUT2 may serve as a therapeutic target for colorectal cancer. Video Abstract