Small interfering RNA expression vector targeting hypoxia-inducible factor 1 alpha inhibits tumor growth in hepatobiliary and pancreatic cancers.
Cancer Gene Ther
; 13(2): 131-40, 2006 Feb.
Article
em En
| MEDLINE
| ID: mdl-16096651
ABSTRACT
Hepatobiliary and pancreatic carcinomas are hypovascular tumors that can proliferate under hypoxic conditions. Recent reports have demonstrated that hypoxia-inducible factor 1 alpha (HIF1alpha) plays an important role in the survival of these cancers. Given these findings, the inhibition of the HIF1alpha pathway might prove to be a powerful tool in the treatment of these cancers. To inhibit HIF1alpha expression, we used small interference RNA (siRNA) expression vectors in this study. The transient transfection of siRNA expression vectors significantly reduced both HIF1alpha mRNA levels (13% of control) and protein levels (41% of control) and significantly inhibited the growth of cancer cell lines (P<0.05). VEGF, Glut1, and aldorase A expressions were also significantly reduced by transfection with these vectors (P<0.05), and we found that these vectors induced apoptosis but not cell cycle arrest. In a subcutaneous tumor model using nude mice, transfected MIA PaCa-2 cells, stably expressing siRNAs, barely formed tumors compared to control (P<0.05). This study thus demonstrates the usefulness of siRNA expression vector in targeting HIF1alpha and points to a potential clinical role in the treatment of pancreatic and hepatobiliary carcinomas.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias Pancreáticas
/
Neoplasias do Sistema Biliar
/
Terapia Genética
/
Regulação Neoplásica da Expressão Gênica
/
RNA Interferente Pequeno
/
Subunidade alfa do Fator 1 Induzível por Hipóxia
/
Vetores Genéticos
/
Neoplasias Hepáticas
Tipo de estudo:
Prognostic_studies
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Cancer Gene Ther
Assunto da revista:
GENETICA MEDICA
/
NEOPLASIAS
/
TERAPEUTICA
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Japão