例如:"lncRNA", "apoptosis", "WRKY"

Target genes of the WNT/beta-catenin pathway in Wilms tumors.

Genes Chromosomes Cancer. 2006 Jun;45(6):565-74. doi:10.1002/gcc.20319
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摘要


The WNT/beta-catenin pathway is involved in numerous human cancers. Mutations of the CTNNB1 (beta-catenin) gene have also been detected in a subset of pediatric Wilms tumors, but the target genes of the deregulated WNT/beta-catenin pathway in these tumors have yet to be identified. To compare gene expression profiles of Wilms tumors with and without mutations of CTNNB1, we used 11.5-k cDNA microarrays. Most of the tumors (86%) had received preoperative chemotherapy as mandated by the European SIOP protocol. The comparison between Wilms tumors with and without CTNNB1 mutations revealed several target genes specifically deregulated in CTNNB1-mutated Wilms tumors. Among these, PITX2, APCDD1, and two members of the endothelin axis (EDN3 and EDNRA) are directly activated downstream targets of the WNT/beta-catenin pathway that may enhance proliferation of these tumor cells. In addition, several upstream inhibitors of WNT/beta-catenin signaling like WIF1 and PRDC were also strongly up-regulated in the CTNNB1-mutated Wilms tumors. This overexpression may be a negative feedback mechanism in tumors with uncontrolled WNT signaling. Moreover, we identified deregulated genes in both the retinoic acid and the RAS pathways, such as ATX/ENPP2 and RIS1, suggesting an association between these two pathways with that of WNT. In addition, the strong representation of muscle-related genes in the expression profile of CTNNB1-mutated Wilms tumors corresponded to histologically detectable areas of myomatous cells in these tumors that displayed intense and preferential nuclear beta-catenin antibody staining. This article contains Supplementary Material available at http://www.interscience.wiley.com/jpages/1045-2257/suppmat.

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