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CARF activates beta-catenin/TCF signaling in the hepatocellular carcinoma #MMPMID27829235
Fan X; Ma X; Cui L; Dang S; Qu J; Zhang J; Wang X; Mao Z
Oncotarget 2016[Dec]; 7 (49): 80404-14 PMID27829235show ga
Overactivation of Ras signaling is very common in the hepatocellular carcinoma (HCC) due to its constitutive active mutation, which makes it a big challenge to target Ras signaling. Therefore, identifying effectors downstream of Ras signaling would benefit the development of novel therapeutic strategies. In this study, it was found that the expression of CARF (collaborate of ARF) was induced by oncogenic RasV12. The expression of CARF was up-regulated in both HCC mouse model (Alb-Cre; P53f/f; Loxp-Stop-Loxp-RasG12D) and human HCC clinical samples. Overexpression of CARF promoted the growth and migration of HCC cells, while knocking down the expression of CARF inhibited the growth and migration of HCC cells. In the mechanism study, CARF was found to interact with beta-catenin, impaired the interaction between beta-catenin and ICAT, and activated beta-catenin/TCF signaling. Moreover, knocking down the expression of CARF inhibited the tumorigenesis in the HCC mouse model. Taken together, this study revealed the oncogenic functions of CARF in the tumorigenesis of HCC by activating beta-catenin/TCF signaling, and suggested CARF might be a therapeutic target in the treatment of HCC.
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Oncotarget 2016 ; 7 (49): 80404-14
