Toll-like receptor 4 activation increases Akt phosphorylation in colon cancer cells.
Anticancer Res
; 29(7): 2473-8, 2009 Jul.
Article
em En
| MEDLINE
| ID: mdl-19596916
ABSTRACT
BACKGROUND:
Toll-like receptors (TLRs) are involved in innate immunity. Overexpression of TLRs has been implicated in various types of cancer including colorectal cancer (CRC). The phosphatidylinositol-3'-kinase (PI3K)/Akt signaling pathway is involved in CRC growth and progression. In this study, we determined whether TLR4 signaling and PI3K/Akt pathway activation occur in CRCs. MATERIALS ANDMETHODS:
Human CRCs and adjacent mucosa were evaluated for TLR4 expression. CRC cell lines were treated with lipopolysaccharide (LPS), endogenous TLR4 ligand, to assess Akt phosphorylation.RESULTS:
Human CRCs overexpressed TLR4 compared to matched normal mucosa. Additionally, TLR4 was expressed in CRC cells and LPS treatment increased Akt phosphorylation of TLR4-positive CRCs in a time-dependent manner.CONCLUSION:
Our results identify TLR4 expression in human CRCs and activation of PI3K with LPS treatment. These findings suggest possible treatment strategies targeting TLR4 in CRC.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Neoplasias Colorretais
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Proteínas Proto-Oncogênicas c-akt
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Receptor 4 Toll-Like
Tipo de estudo:
Prognostic_studies
Limite:
Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article