Mitogen-activated protein kinase inhibition reduces mucin 2 production and mucinous tumor growth.
Transl Res
; 166(4): 344-54, 2015 Oct.
Article
em En
| MEDLINE
| ID: mdl-25890193
Excessive accumulation of mucin 2 (MUC2) protein (a gel-forming secreted mucin) within the peritoneal cavity is the major cause of morbidity and mortality in pseudomyxoma peritonei (PMP), a unique mucinous malignancy of the appendix. Mitogen-activated protein kinase (MAPK) signaling pathway is upregulated in PMP and has been shown to modulate MUC2 promoter activity. We hypothesized that targeted inhibition of the MAPK pathway would be a novel, effective, and safe therapeutic strategy to reduce MUC2 production and mucinous tumor growth. We tested RDEA119, a specific MEK1/2 (MAPK extracellular signal-regulated kinase [ERK] kinase) inhibitor, in MUC2-secreting LS174T cells, human PMP explant tissue, and in a unique intraperitoneal murine xenograft model of PMP. RDEA119 reduced ERK1/2 phosphorylation and inhibited MUC2 messenger RNA and protein expression in vitro. In the xenograft model, chronic oral therapy with RDEA119 inhibited mucinous tumor growth in an MAPK pathway-dependent manner and this translated into a significant improvement in survival. RDEA119 downregulated phosphorylated ERK1/2 and nuclear factor κB p65 protein signaling and reduced activating protein 1 (AP1) transcription factor binding to the MUC2 promoter in LS174T cells. This study provides a preclinical rationale for the use of MEK inhibitors to treat patients with PMP.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias Císticas, Mucinosas e Serosas
/
Proteínas Quinases Ativadas por Mitógeno
/
Mucina-2
Tipo de estudo:
Prognostic_studies
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Transl Res
Assunto da revista:
MEDICINA
/
TECNICAS E PROCEDIMENTOS DE LABORATORIO
Ano de publicação:
2015
Tipo de documento:
Article
País de publicação:
Estados Unidos