BMB Reports 2018; 51(9): 425-426
Dishevelling Wnt and Hippo
Nam Hee Kim1, Yoonmi Lee1 & Jong In Yook1,2,*
1Oral Cancer Research Institute and 2Department of Oral Pathology, Yonsei University College of Dentistry, Seoul 03722, Korea
Correspondence to: E-mail:
Received: August 1, 2018; Published online: September 30, 2018.
© Korean Society for Biochemistry and Molecular Biology. All rights reserved.

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As highly conserved signaling cascades of multicellular organisms, Wnt and Hippo pathways control a wide range of cellular activities, including cell adhesion, fate determination, cell cycle, motility, polarity, and metabolism. Dysregulation of those pathways are implicated in many human diseases, including cancer. Similarly to β-catenin in the Wnt pathway, the YAP transcription co-activator is a major player in Hippo. Although the intracellular dynamics of YAP are well-known to largely depend on phosphorylation by LATS and AMPK kinases, the molecular effector of YAP cytosolic translocation remains unidentified. Recently, we reported that the Dishevelled (DVL), a key scaffolding protein between canonical and non-canonical Wnt pathway, is responsible for nuclear export of phosphorylated YAP. The DVL is also required for YAP intracellular trafficking induced by E-cadherin, α-catenin, or metabolic stress. Note that the p53/LATS2 and LKB1/AMPK tumor suppressor axes, commonly inactivated in human cancer, govern the reciprocal inhibition between DVL and YAP. Conversely, loss of the tumor suppressor allows co-activation of YAP and Wnt independent of epithelial polarity or contact inhibition in human cancer. These observations provide novel mechanistic insight into (1) a tight molecular connection merging the Wnt and Hippo pathways, and (2) the importance of tumor suppressor contexts with respect to controlled proliferation and epithelial polarity regulated by cell adhesion.
Keywords: Dishevelled, Hippo pathway, Tumor suppressor, Wnt signaling, YAP

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