Noninvasive bioluminescent and microPET imaging for the regulation of NF-kappaB in human hepatoma-bearing mice.
Anticancer Res
; 29(4): 987-94, 2009 Apr.
Article
em En
| MEDLINE
| ID: mdl-19414336
ABSTRACT
UNLABELLED The activity of nuclear factor-kappaB (NF-kappaB), a nuclear transcription factor, influences both critical tumor promotion and host-tumor interactions. Preventing NF-kappaB activation may thus inhibit the development of cancer. Therefore, development of easy and rapid methods to evaluate the regulation of NF-kappaB is needed for drug discovery. The aim of this study was to visualize the regulation of NF-kappaB by real-time, noninvasive bioluminescence and microPET imaging in vivo. MATERIALS AND METHODS:
A highly responsive HepG2/NF-kappaB/luc clone L for 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced tumor promotion inhibited by methotrexate (MTX) was selected by high-throughput bioluminescent imaging (BLI) in vitro. BLI and microPET using (18)F-fluorodeoxyglucose (FDG) imaging were performed in HepG2/NF-kappaB/Luc/L hepatoma-bearing SCID mice.RESULTS:
The luciferase expression by BLI assay reflected that the TPA-induced NF-kappaB activity was suppressed by MTX after 16 h treatment. A positive correlation between in vitro and in vivo MTX-suppressed TPA-induced NF-kappaB activity was indicated. MicroPET imaging could not demonstrate any decrease in FDG uptake during the early stage at 24 h after TPA and MTX treatment.CONCLUSION:
BLI directly revealed that MTX inhibited cellular transformation by suppressing NF-kappaB activity. Molecular imaging would accelerate the validation of the gene regulation of tumor cells in preclinical cellular and mouse models.
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Base de dados:
MEDLINE
Assunto principal:
NF-kappa B
/
Tomografia por Emissão de Pósitrons
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Neoplasias Hepáticas Experimentais
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Medições Luminescentes
Tipo de estudo:
Diagnostic_studies
/
Prognostic_studies
Limite:
Animals
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Female
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Humans
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article