Radiation-induced Notch signaling in breast cancer stem cells.
Int J Radiat Oncol Biol Phys
; 87(3): 609-18, 2013 Nov 01.
Article
em En
| MEDLINE
| ID: mdl-23992604
ABSTRACT
PURPOSE:
To explore patterns of Notch receptor and ligand expression in response to radiation that could be crucial in defining optimal dosing schemes for γ-secretase inhibitors if combined with radiation. METHODS AND MATERIALS Using MCF-7 and T47D breast cancer cell lines, we used real-time reverse transcription-polymerase chain reaction to study the Notch pathway in response to radiation.RESULTS:
We show that Notch receptor and ligand expression during the first 48 hours after irradiation followed a complex radiation dose-dependent pattern and was most pronounced in mammospheres, enriched for breast cancer stem cells. Additionally, radiation activated the Notch pathway. Treatment with a γ-secretase inhibitor prevented radiation-induced Notch family gene expression and led to a significant reduction in the size of the breast cancer stem cell pool.CONCLUSIONS:
Our results indicate that, if combined with radiation, γ-secretase inhibitors may prevent up-regulation of Notch receptor and ligand family members and thus reduce the number of surviving breast cancer stem cells.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Células-Tronco Neoplásicas
/
Neoplasias da Mama
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Regulação Neoplásica da Expressão Gênica
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Receptores Notch
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Secretases da Proteína Precursora do Amiloide
Limite:
Animals
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Female
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Humans
Idioma:
En
Revista:
Int J Radiat Oncol Biol Phys
Ano de publicação:
2013
Tipo de documento:
Article