Constitutive activation of glycogen synthase kinase-3beta correlates with better prognosis and cyclin-dependent kinase inhibitors in human gastric cancer.
BMC Gastroenterol
; 10: 91, 2010 Aug 12.
Article
em En
| MEDLINE
| ID: mdl-20704706
ABSTRACT
BACKGROUND:
Aberrant regulation of glycogen synthase kinase-3beta (GSK-3beta) has been implicated in several human cancers; however, it has not been reported in the gastric cancer tissues to date. The present study was performed to determine the expression status of active form of GSK-3beta phosphorylated at Tyr216 (pGSK-3beta) and its relationship with other tumor-associated proteins in human gastric cancers.METHODS:
Immunohistochemistry was performed on tissue array slides containing 281 human gastric carcinoma specimens. In addition, gastric cancer cells were cultured and treated with a GSK-3beta inhibitor lithium chloride (LiCl) for immunoblot analysis.RESULTS:
We found that pGSK-3beta was expressed in 129 (46%) of 281 cases examined, and was higher in the early-stages of pathologic tumor-node-metastasis (P < 0.001). The expression of pGSK-3beta inversely correlated with lymphatic invasion (P < 0.001) and lymph node metastasis (P < 0.001) and correlated with a longer patient survival (P < 0.001). In addition, pGSK-3beta expression positively correlated with that of p16, p21, p27, p53, APC, PTEN, MGMT, SMAD4, or KAI1 (P < 0.05), but not with that of cyclin D1. This was confirmed by immunoblot analysis using SNU-668 gastric cancer cells treated with LiCl.CONCLUSIONS:
GSK-3beta activation was frequently observed in early-stage gastric carcinoma and was significantly correlated with better prognosis. Thus, these findings suggest that GSK-3beta activation is a useful prognostic marker for the early-stage gastric cancer.
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Neoplasias Gástricas
/
Quinase 3 da Glicogênio Sintase
/
Proteínas Inibidoras de Quinase Dependente de Ciclina
Tipo de estudo:
Prognostic_studies
Limite:
Humans
Idioma:
En
Revista:
BMC Gastroenterol
Assunto da revista:
GASTROENTEROLOGIA
Ano de publicação:
2010
Tipo de documento:
Article