Journal
JOURNAL OF CELLULAR PHYSIOLOGY
Volume 230, Issue 6, Pages 1170-1180Publisher
WILEY
DOI: 10.1002/jcp.24853
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Funding
- National Institute of Health (NIH) [DK085194, DK093809, DK102934, CA178599]
- Charles and Johanna Busch Memorial Award [659160]
- Rutgers University Faculty Research Grant [281708]
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Wg/Wnts are paracrine and autocrine ligands that activate distinct signaling pathways while being internalized through surface receptors. Converging and contrasting views are shaping our understanding of whether, where, and how endocytosis may modulate Wnt signaling. We gather considerable amount of evidences to elaborate the point that signal-receiving cells utilize distinct, flexible, and sophisticated vesicular trafficking mechanisms to keep Wnt signaling activity in check. Same molecules in a highly context-dependent fashion serve as regulatory hub for various signaling purposes: amplification, maintenance, inhibition, and termination. Updates are provided for the regulatory mechanisms related to the three critical cell surface complexes, Wnt-Fzd-LRP6, Dkk1-Kremen-LRP6, and R-spondin-LGR5-RNF43, which potently influence Wnt signaling. We pay particular attentions to how cells achieve sustained and delicate control of Wnt signaling strength by employing comprehensive aspects of vesicular trafficking. J. Cell. Physiol. 230: 1170-1180, 2015. (c) 2014 Wiley Periodicals, Inc., A Wiley Company
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