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Eriodictyol is a natural flavonoid with many pharmacological effects, such as anti-oxidation, anti-inflammation, anti-tumor, and neuroprotection. Besides, it has been reported that flavonoids play an important role in protein glycosylation. The fucosylation structure is closely associated with processes of various tumor metastases. TSTA3 is involved in the de novo synthesis and can convert cellular GDP-D-mannose into GDP-L-fucose. It was predicted on the STITCH database that eriodictyol interacted with TSTA3. In addition, literature has confirmed that TSTA3 is upregulated in CRC and can regulate the proliferation and migration of breast cancer cells. Herein, the precise effects of eriodictyol on the clone-forming, proliferative, migratory and invasive abilities of CRC cells as well as EMT process were assessed. Moreover, the correlation among eriodictyol, TSTA3, and fucosylation in these malignant behaviors of CRC cells was evaluated, in order to elucidate the underlying mechanism. The current work discovered that eriodictyol inhibited the viability, clone-formation, proliferation, migration, invasion, and EMT of CRC cells, and that these inhibitory effects of eriodictyol on the malignant behavior of CRC cells were reversed by TSTA3 overexpression. Additionally, eriodictyol suppresses fucosylation by downregulating the TSTA3 expression. Results confirmed that fucosylation inhibitor (2-F-Fuc) inhibited clone formation, proliferation, migration, invasion, as well as EMT of CRC cells and eriodictyol treatment further reinforced the suppressing effects of 2-F-Fuc on the malignant behavior of CRC cells. We conclude that eriodictyol suppresses the clone-forming, proliferative, migrative and invasive abilities of CRC cells as well as represses the EMT process by downregulating TSTA3 expression to restrain fucosylation.

bioengineered

Eriodictyol suppresses the malignant progression of colorectal cancer by downregulating tissue specific transplantation antigen P35B (TSTA3) expression to restrain fucosylation