Aberrant CpG Island Hypermethylation of the RUNX3 Gene in Osteosarcoma / 대한정형외과학회잡지
The Journal of the Korean Orthopaedic Association
; : 285-293, 2009.
Article
em Ko
| WPRIM
| ID: wpr-656420
Biblioteca responsável:
WPRO
ABSTRACT
PURPOSE: Transcriptional silencing of tumor suppressor genes by aberrant methylation of CpG islands plays a crucial role in the development of human cancers. We comprehensively examined the methylation status of several tumor suppressor genes in osteosarcoma with a special focus on the RUNX3 gene. MATERIALS AND METHODS: Methylation-specific polymerase chain reaction (MSP) was performed for osteosarcoma tissues and their cell lines. MSP and RT-PCR for the RUNX3 gene were performed in the tumor-derived cell lines and the immortalized cell lines. The demethylating agent 5-aza-2' deoxycytidine was used in the SaOS-2 cell line to reverse the methylation status. RESULTS: Hypermethylation of the RUNX3 gene was observed in 60% (24 of 40) of the osteosarcoma tissues, whereas other tumor suppressor genes showed very low methylation. Thirteen of 30 (43%) tumor-derived cell lines, and U-2OS and SaOS-2 showed hypermethylation of the RUNX3 gene on MSPCR. However, RUNX3 was expressed in the SaOS-2 cell line, as determined by RT-PCR, and the expression was augmented by treatment with 5-aza-2' deoxycytidine. CONCLUSION: Our study suggests that aberrant methylation is an important mechanism of RUNX3 down-regulation in osteosarcoma. This data may have potential significance in developing a potential therapeutic target for osteosarcoma.
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Índice:
WPRIM
Assunto principal:
Osteossarcoma
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Regulação para Baixo
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Linhagem Celular
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Reação em Cadeia da Polimerase
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Genes Supressores de Tumor
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Ilhas de CpG
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Desoxicitidina
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Metilação
Limite:
Humans
Idioma:
Ko
Revista:
The Journal of the Korean Orthopaedic Association
Ano de publicação:
2009
Tipo de documento:
Article