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- W3134443504 endingPage "1021" @default.
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- W3134443504 abstract "The hyaluronan receptor CD44 can undergo proteolytic cleavage in two steps, leading to the release of its intracellular domain; this domain is translocated to the nucleus, where it affects the transcription of target genes. We report that CD44 cleavage in A549 lung cancer cells and other cells is promoted by transforming growth factor-beta (TGFβ) in a manner that is dependent on ubiquitin ligase tumor necrosis factor receptor-associated factor 4 or 6 (TRAF4 or TRAF6, respectively). Stem-like A549 cells grown in spheres displayed increased TRAF4-dependent expression of CD44 variant isoforms, CD44 cleavage, and hyaluronan synthesis. Mechanistically, TRAF4 activated the small GTPase RAC1. CD44-dependent migration of A549 cells was inhibited by siRNA-mediated knockdown of TRAF4, which was rescued by the transfection of a constitutively active RAC1 mutant. Our findings support the notion that TRAF4/6 mediates pro-tumorigenic effects of CD44, and suggests that inhibitors of CD44 signaling via TRAF4/6 and RAC1 may be beneficial in the treatment of tumor patients." @default.
- W3134443504 created "2021-03-15" @default.
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- W3134443504 date "2021-03-01" @default.
- W3134443504 modified "2023-10-17" @default.
- W3134443504 title "TRAF4/6 Is Needed for CD44 Cleavage and Migration via RAC1 Activation" @default.
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- W3134443504 doi "https://doi.org/10.3390/cancers13051021" @default.
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