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Zeb1 affects epithelial cell adhesion by diverting glycosphingolipid metabolism #MMPMID25643708
Mathow D; Chessa F; Rabionet M; Kaden S; Jennemann R; Sandhoff R; Gröne HJ; Feuerborn A
EMBO Rep 2015[Mar]; 16 (3): 321-31 PMID25643708show ga
This study proposes that the transcription factor Zeb1 modulates epithelial cell adhesion by diverting glycosphingolipid metabolism. Zeb1 promotes expression of a-series glycosphingolipids via regulating expression of GM3 synthase (St3gal5), which mechanistically involves Zeb1 binding to the St3gal5 promoter as well as suppressing microRNA-mediated repression of St3gal5. Functionally, the repression of St3gal5 suffices to elevate intercellular adhesion and expression of distinct junction-associated proteins, reminiscent of knockdown of Zeb1. Conversely, overexpressing St3gal5 sensitizes cells towards TGF-?1-induced disruption of cell?cell interaction and partially antagonizes elevation of intercellular adhesion imposed by Zeb1 knockdown. These results highlight a direct connection of glycosphingolipid metabolism and epithelial cell adhesion via Zeb1.