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- W2076467232 abstract "( Cancer Sci 2010; 101: 700–706) Wnt signaling plays key roles in development, cell growth, differentiation, polarity formation, neural development, and carcinogenesis. DIX Domain Containing 1 ( DIXDC 1 ), a novel component of the Wnt pathway, was recently cloned. DIXDC1 is the human homolog of Ccd1, a positive regulator of the Wnt signaling pathway during zebrafish neural patterning. Little has been known about DIXDC1 gene expression regulation. In the present study, we showed that the DIXDC1 protein was induced upon Wnt‐3a stimulation, whereas the DIXDC1 mRNA level was not significantly increased after Wnt‐3a treatment. Positive DIXDC1 staining was detected in colon cancer cells and was colocalized with β‐catenin staining. However, the DIXDC1 mRNA expression decreased in human colon cancer cells compared to the matched normal colon epithelial cells. Our further investigation showed that the DIXDC1 protein was degraded through the proteasome pathway, and the activation of canonical Wnt signaling decreased the ubiquitin‐dependent degradation of both the ectopic and endogenous DIXDC1 protein. In order to explore the possible mechanism of the ubiquitination of DIXDC1, we found that the phosphorylation of DIXDC1 was inhibited by Wnt‐3a. Collectively, these results indicate that canonical Wnt/β‐catenin pathway activation might upregulate DIXDC1 through a post‐translational mechanism by inhibiting the ubiquitin‐mediated degradation of the DIXDC1 protein." @default.
- W2076467232 created "2016-06-24" @default.
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- W2076467232 date "2010-02-17" @default.
- W2076467232 modified "2023-10-18" @default.
- W2076467232 title "Wnt signaling stabilizes the DIXDC1 protein through decreased ubiquitin-dependent degradation" @default.
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- W2076467232 doi "https://doi.org/10.1111/j.1349-7006.2009.01448.x" @default.
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