IFN-beta down-regulates the expression of DNA repair gene MGMT and sensitizes resistant glioma cells to temozolomide.
Cancer Res
; 65(17): 7573-9, 2005 Sep 01.
Article
em En
| MEDLINE
| ID: mdl-16140920
ABSTRACT
Alkylating agents, such as temozolomide, are among the most effective cytotoxic agents used for malignant gliomas, but responses remain very poor. The DNA repair protein O6-methylguanine-DNA methyltransferase (MGMT) plays an important role in cellular resistance to alkylating agents. IFN-beta can act as a drug sensitizer, enhancing toxicity against a variety of neoplasias, and is widely used in combination with other antitumor agents such as nitrosoureas. Here, we show that IFN-beta sensitizes glioma cells that harbor the unmethylated MGMT promoter and are resistant to temozolomide. By means of oligonucleotide microarray and RNA interference, we reveal that the sensitizing effect of IFN-beta was possibly due to attenuation of MGMT expression via induction of the protein p53. Our study suggests that clinical efficacy of temozolomide might be improved by combination with IFN-beta using appropriate doses and schedules of administration.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Protocolos de Quimioterapia Combinada Antineoplásica
/
Interferon beta
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Antineoplásicos Alquilantes
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O(6)-Metilguanina-DNA Metiltransferase
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Dacarbazina
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Glioma
Limite:
Humans
Idioma:
En
Revista:
Cancer Res
Ano de publicação:
2005
Tipo de documento:
Article