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14-3-3 and β-catenin are secreted on extracellular vesicles to activate the oncogenic Wnt pathway. | LitMetric

14-3-3 and β-catenin are secreted on extracellular vesicles to activate the oncogenic Wnt pathway.

Mol Oncol

Department of Anatomy and Anthropology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel. Electronic address:

Published: July 2014

AI Article Synopsis

Article Abstract

Aberrant activation of the canonical Wnt signal transduction pathway is involved in a large number of human diseases. β-catenin, the key effector protein of the canonical Wnt pathway, functions in the nucleus with T-cell factor/lymphoid enhancer factor (TCF/LEF) to activate expression of Wnt target genes. Here we show that members of the 14-3-3 protein family bind disheveled-2 (Dvl-2) and glycogen synthase-3β (GSK-3β) to attenuate the interaction between GSK-3β and β-catenin. Importantly, 14-3-3 and β-catenin form "bleb-like" structures and are secreted via extracellular vesicles to induce Wnt signaling activity in target cells. Our data suggest a novel way of transducing the oncogenic Wnt signal in which β-catenin is regulated by 14-3-3ζ through the formation of "oncosomes" that contain both the 14-3-3 and β-catenin proteins.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5528515PMC
http://dx.doi.org/10.1016/j.molonc.2014.03.011DOI Listing

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