Tenascin-X: beyond the architectural function

Abstract : Tenascin-X is the largest member of the tenascin (TN) family of evolutionary conserved extracellular matrix glycoproteins, which also comprises TN-C, TN-R and TN-W. Among this family, TN-X is the only member described so far to exert a crucial architectural function as evidenced by a connective tissue disorder (a recessive form of Ehlers-Danlos syndrome) resulting from a loss-of-function of this glycoprotein in humans and mice. However, TN-X is more than an architectural protein, as it displays features of a matricellular protein by modulating cell adhesion. However, the cellular functions associated with the anti-adhesive properties of TN-X have not yet been revealed. Recent findings indicate that TN-X is also an extracellular regulator of signaling pathways. Indeed, TN-X has been shown to regulate the bioavailability of the Transforming Growth Factor (TGF)-β and to modulate epithelial cell plasticity. The next challenges will be to unravel whether the signaling functions of TN-X are functionally linked to its matricellular properties.
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Soumis le : lundi 2 septembre 2019 - 17:47:15
Dernière modification le : jeudi 21 novembre 2019 - 01:47:48

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Ulrich Valcourt, Lindsay Alcaraz, Jean-Yves Exposito, Claire Lethias, Laurent Bartholin. Tenascin-X: beyond the architectural function. Cell Adhesion and Migration, Taylor & Francis, 2015, 9 (1-2), pp.154-165. ⟨10.4161/19336918.2014.994893⟩. ⟨hal-02275897⟩

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