Wnt Signaling
in Cancer and Stem Cells
Wnt Signaling and Cancer
Wnt signaling is essential for development, tissue homeostasis, and regeneration. However, hyperactivation of Wnt signaling leads to human disease including cancer. Thus, blockade of Wnt signaling will be the potential therapeutic approaches for cancer treatment. However, due to the crucial roles of Wnt signaling in tissue stem cell maintenance and activation, targeting Wnt signaling is still challenging. To tackle this problem, we are addressing the following questions: How do we manipulate Wnt signaling for disease treatment? How can cancer-specific Wnt signaling regulators be therapeutically targeted?
Identifying and Targeting Cancer-Specific Wnt Signaling Regulators
Many human cancers harbor genetic or epigenetic deregulation of the key components of Wnt signaling. This setting hyperactivates Wnt/beta-catenin target gene expression (c-Myc, Cyclin D1, etc.), which results in tumor initiation, proliferation, and metastasis. Intriguingly, despite the homogenous mutations of tumor cells, the activity of Wnt/beta-catenin signaling in tumors is heterogeneous, which is called 'beta-catenin paradox'. Moreover, many recent reports including ours strongly suggest that even Wnt/beta-catenin signaling mutated cells can be negatively controlled by the specific manipulation of Wnt/beta-catenin signaling. Based on the beta-catenin paradox concept, we have sought to identify cancer-specific Wnt signaling regulators. Our comprehensive approaches unveiled the cancer-specific Wnt signaling regulators (Mol Cell 2013, Cell Reports 2013, Nat Comms 2016a, Nat Comms 2016b). Furthermore, we found that genetic ablation (knock-out) of these genes significantly inhibits tumor initiation and proliferation in mouse models. Currently, we are developing the ways to manipulate such Wnt signaling regulators as the new regime of cancer treatment.
Related publications
Jung et al., Nature Cell Biology 2018a
Jung et al., Nature Cell Biology 2018b
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Jun et al., Nature Communications 2016
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Wang et al., Developmental Cell 2015
Jung et al., Molecular Cell 2013
Jun et al., Cell Reports 2013
Park et al., Nature 2009
Park et a., Developmental Cell 2006
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Kim et al., Nature Cell Biology 2004