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RSS Feeds{beta}-Catenin mutations as determinants of hepatoblastoma phenotypes in mice [Metabolism] (Journal of Biological Chemistry)

 
 

15 november 2019 11:02:53

 
{beta}-Catenin mutations as determinants of hepatoblastoma phenotypes in mice [Metabolism] (Journal of Biological Chemistry)
 


Hepatoblastoma (HB) is the most common pediatric liver cancer. Although long-term survival of HB is generally favorable, it depends on clinical stage, tumor histology, and a variety of biochemical and molecular features. HB appears almost exclusively before the age of 3 years, is represented by seven histological subtypes, and is usually associated with highly heterogeneous somatic mutations in the catenin ?1 (CTNNB1) gene, which encodes ?-catenin, a Wnt ligand-responsive transcriptional co-factor. Numerous recurring ?-catenin mutations, not previously documented in HB, have also been identified in various other pediatric and adult cancer types. Little is known about the underlying factors that determine the above HB features and behaviors or whether non-HB-associated ?-catenin mutations are tumorigenic when expressed in hepatocytes. Here, we investigated the oncogenic properties of 14 different HB- and non-HB-associated ?-catenin mutants encoded by Sleeping Beauty vectors following their delivery into the mouse liver by hydrodynamic tail-vein injection. We show that all ?-catenin mutations, as well as WT ?-catenin, are tumorigenic when co-expressed with a mutant form of yes-associated protein (YAP). However, tumor growth rates, histologies, nuclear-to-cytoplasmic partitioning, and metabolic and transcriptional landscapes were strongly influenced by the identities of the ?-catenin mutations. These findings provide a context for understanding at the molecular level the notable biological diversity of HB.


 
174 viewsCategory: Biochemistry
 
A piperidinol-containing molecule is active against Mycobacterium tuberculosis by inhibiting the mycolic acid flippase activity of MmpL3 [Microbiology] (Journal of Biological Chemistry)
Calmodulin is involved in the dual subcellular location of two chloroplast proteins [Cell Biology] (Journal of Biological Chemistry)
 
 
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