TGFß signaling directs serrated adenomas to the mesenchymal colorectal cancer subtype.
EMBO Mol Med
; 8(7): 745-60, 2016 07.
Article
em En
| MEDLINE
| ID: mdl-27221051
ABSTRACT
The heterogeneous nature of colorectal cancer (CRC) complicates prognosis and is suggested to be a determining factor in the efficacy of adjuvant therapy for individual patients. Based on gene expression profiling, CRC is currently classified into four consensus molecular subtypes (CMSs), characterized by specific biological programs, thus suggesting the existence of unifying developmental drivers for each CMS Using human organoid cultures, we investigated the role of such developmental drivers at the premalignant stage of distinct CRC subtypes and found that TGFß plays an important role in the development of the mesenchymal CMS4, which is of special interest due to its association with dismal prognosis. We show that in tubular adenomas (TAs), which progress to classical CRCs, the dominating response to TGFß is death by apoptosis. By contrast, induction of a mesenchymal phenotype upon TGFß treatment prevails in a genetically engineered organoid culture carrying a BRAF(V) (600E) mutation, constituting a model system for sessile serrated adenomas (SSAs). Our data indicate that TGFß signaling is already active in SSA precursor lesions and that TGFß is a critical cue for directing SSAs to the mesenchymal, poor-prognosis CMS4 of CRC.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Temas:
Geral
/
Tipos_de_cancer
/
Colon_e_reto
Base de dados:
MEDLINE
Assunto principal:
Neoplasias Colorretais
/
Transdução de Sinais
/
Adenoma
/
Fator de Crescimento Transformador beta
/
Carcinogênese
Tipo de estudo:
Prognostic_studies
Limite:
Humans
Idioma:
En
Revista:
EMBO Mol Med
Assunto da revista:
BIOLOGIA MOLECULAR
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Holanda