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cc-by (c) Reverter Martín, Meritxell et al., 2014
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/54324

Cholesterol regulates Syntaxin 6 trafficking at the TGN-endosomal boundaries

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Inhibition of cholesterol export from late endosomes causes cellular cholesterol imbalance, including cholesterol depletion in the trans-Golgi network (TGN). Here, using Chinese hamster ovary (CHO) Niemann-Pick type C1 (NPC1) mutant cell lines and human NPC1 mutant fibroblasts, we show that altered cholesterol levels at the TGN/endosome boundaries trigger Syntaxin 6 (Stx6) accumulation into VAMP3, transferrin, and Rab11-positive recycling endosomes (REs). This increases Stx6/VAMP3 interaction and interferes with the recycling of αVβ3 and α5β1 integrins and cell migration, possibly in a Stx6-dependent manner. In NPC1 mutant cells, restoration of cholesterol levels in the TGN, but not inhibition of VAMP3, restores the steady-state localization of Stx6 in the TGN. Furthermore, elevation of RE cholesterol is associated with increased amounts of Stx6 in RE. Hence, the fine-tuning of cholesterol levels at the TGN-RE boundaries together with a subset of cholesterol-sensitive SNARE proteins may play a regulatory role in cell migration and invasion.

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REVERTER MARTÍN, Meritxell, RENTERO ALFONSO, Carles, GARCÍA MELERO, Ana, HOQUE, Monira, VILÀ DE MUGA, Sandra, ÁLVAREZ-GUAITA, Anna, CONWAY, James, WOOD, Peta, CAIRNS, Rose, LYKOPOULOU, Lila, GRINBERG VAISMAN, Daniel raúl, VILAGELIU I ARQUÉS, Lluïsa, BOSCH I RODRÍGUEZ, Marta, HEEREN, Joerg, BLASI CABÚS, Joan, TIMPSON, Paul, POL I SOROLLA, Albert, TEBAR RAMON, Francesc, MURRAY, Rachael z., GREWAL, Thomas. Cholesterol regulates Syntaxin 6 trafficking at the TGN-endosomal boundaries. _Cell Reports_. 2014. Vol. 7, núm. 3, pàgs. 883-897. [consulta: 25 de febrer de 2026]. ISSN: 2211-1247. [Disponible a: https://hdl.handle.net/2445/54324]

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