Upon Wnt stimulation, Rac1 activation requires Rac1 and Vav2 binding to p120-catenin.

A role for Rac1 GTPase in canonical Wnt signaling has recently been demonstrated, showing that it is required for β-catenin translocation to the nucleus. In this study, we investigated the mechanism of Rac1 stimulation by Wnt. Upregulation of Rac1 activity by Wnt3a temporally correlated with enhanced p120-catenin binding to Rac1 and Vav2.

Wnt controls the transcriptional activity of Kaiso through CK1ε-dependent phosphorylation of p120-catenin.

p120-catenin is an E-cadherin-associated protein that modulates E-cadherin function and stability. In response to Wnt3a, p120-catenin is phosphorylated at Ser268 and Ser269, disrupting its interaction with E-cadherin. Here, we describe that Wnt-induced p120-catenin phosphorylation at Ser268 and Ser269 also enhances its binding to the transcriptional factor Kaiso, preventing Kaiso-mediated inhibition of the β-catenin-Tcf-4 transcriptional complex.

A p120-catenin-CK1epsilon complex regulates Wnt signaling.

p120-catenin is an E-cadherin-associated protein that modulates E-cadherin function and stability. We describe here that p120-catenin is required for Wnt pathway signaling. p120-catenin binds and is phosphorylated by CK1ε in response to Wnt3a.

Reactive hyperemia-related changes in carotid-radial pulse wave velocity as a potential tool to characterize the endothelial dynamics.

Unlabelled: Current methods used to evaluate the endothelial function have limitations. The analysis of the pulse wave velocity (PWV) response to transient ischaemia could be an alternative to evaluate the endothelial dynamics.

Aims: To analyze (a) the carotid-radial PWV temporal profile during flow mediated dilatation test, and (b) the PWV changes considering its main vascular geometrical (diameter) and intrinsic (elastic modulus) determinants.

Biomechanics of the ergometric stress tests: regional and local effects on elastic, transitional and muscular human arteries.

Unlabelled: Ergometric exercise stress tests (EST) give important information about the cardiovascular (CV) response to increased demands. The expected EST-related changes in variables like blood pressure and heart rate are known, but those in the arterial biomechanics are controversial and incompletely characterized.

Aims: a) to characterize the regional and local arterial biomechanical behavior in response to EST, and its temporal profile in the post-EST recovery phase and (b) to compare different arteries biomechanical response to EST.

The hypoxia-controlled FBXL14 ubiquitin ligase targets SNAIL1 for proteasome degradation.

The transcription factor SNAIL1 is a master regulator of epithelial to mesenchymal transition. SNAIL1 is a very unstable protein, and its levels are regulated by the E3 ubiquitin ligase beta-TrCP1 that interacts with SNAIL1 upon its phosphorylation by GSK-3beta. Here we show that SNAIL1 polyubiquitylation and degradation may occur in conditions precluding SNAIL1 phosphorylation by GSK-3beta, suggesting that additional E3 ligases participate in the control of SNAIL1 protein stability.