ß-Catenin mutations as determinants of hepatoblastoma phenotypes in mice.
J Biol Chem
; 294(46): 17524-17542, 2019 11 15.
Article
en En
| MEDLINE
| ID: mdl-31597698
ABSTRACT
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 ß1 (CTNNB1) gene, which encodes ß-catenin, a Wnt ligand-responsive transcriptional co-factor. Numerous recurring ß-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 ß-catenin mutations are tumorigenic when expressed in hepatocytes. Here, we investigated the oncogenic properties of 14 different HB- and non-HB-associated ß-catenin mutants encoded by Sleeping Beauty vectors following their delivery into the mouse liver by hydrodynamic tail-vein injection. We show that all ß-catenin mutations, as well as WT ß-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 ß-catenin mutations. These findings provide a context for understanding at the molecular level the notable biological diversity of HB.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Hepatoblastoma
/
Beta Catenina
/
Neoplasias Hepáticas
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
J Biol Chem
Año:
2019
Tipo del documento:
Article