Effect of age on the association between p16CDKN2A methylation and DNMT3B polymorphism in head and neck carcinoma and patient survival.
Int J Oncol
; 37(1): 167-76, 2010 Jul.
Article
em En
| MEDLINE
| ID: mdl-20514408
ABSTRACT
De novo DNA methylation is a relevant epigenetic mechanism, which represses gene transcription and commonly inactivates tumor suppressor genes in carcinogenesis. A single nucleotide polymorphism of DNMT3B, C46359T (-149C-->T) was reported to modulate individual's susceptibility to cancer. We investigated the role of this polymorphic variant regarding the methylation status of the p16CDKN2A gene in young and older patients with head and neck squamous cell carcinoma (HNCC) matched by the TNM staging system, together with its impact on patients survival. The results showed that the presence of the allele T of the polymorphism DNMT3B (-149C-->T) was associated with advanced TNM staging and smoking habit, but no association was found between this polymorphisms and DNMT3B immunostaining. While p16CDKN2A methylation was significantly associated with smoking habit in older patients, this parameter was associated with family history of cancer in young patients. Moreover, in older patients the absence of p16CDKN2A promoter methylation had a negative impact on survival. In conclusion, nucleotide polymorphism of DNMT3B is not associated with methylation of p16CDKN2A gene in HNSCC. The association of p16CDKN2A gene methylation with smoking, family history of cancer and survival is dependent on age.
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Coleções:
01-internacional
Temas:
Mortalidade
/
Geral
/
Tipos_de_cancer
/
Outros_tipos
Base de dados:
MEDLINE
Assunto principal:
Carcinoma de Células Escamosas
/
Metilação de DNA
/
Genes p16
/
Polimorfismo de Nucleotídeo Único
/
DNA (Citosina-5-)-Metiltransferases
/
Neoplasias de Cabeça e Pescoço
Tipo de estudo:
Observational_studies
/
Risk_factors_studies
Limite:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Int J Oncol
Assunto da revista:
NEOPLASIAS
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
Brasil