Investigation of PTEN promoter methylation in ameloblastoma
Med. oral patol. oral cir. bucal (Internet)
; 25(4): e481-e487, jul. 2020. tab, ilus
Artigo
em Inglês
| IBECS
| ID: ibc-196500
Biblioteca responsável:
ES1.1
Localização: BNCS
ABSTRACT
BACKGROUND:
Phosphatase and tensin homolog (PTEN) acts as a tumor suppressor gene. Inactivation of PTEN has been reported in various types of cancers. PTEN promoter methylation possibly underlies PTEN inactivation, which results in tumorigenesis. The aim of this study was to investigate whether PTEN promoter methylation contributes to PTEN inactivation in ameloblastoma and its associated protein expression. MATERIAL ANDMETHODS:
In total, 20 fresh-frozen ameloblastoma samples were evaluated for PTEN promoter methylation using methylation-specific polymerase chain reaction (MS-PCR). A subset of 10 paraffin-embedded ameloblastoma samples was examined for PTEN expression through immunohistochemistry. Four primary cultured ameloblastoma cells were investigated for PTEN promoter methylation and PTEN transcriptional expression via reverse transcription PCR.RESULTS:
PTEN promoter methylation was detected in 65% (13/20) of the ameloblastoma samples. Of 10 ameloblastoma samples, 4 exhibited reduced PTEN expression. Of 5 samples with methylated PTEN, 3 (60%) were associated with loss of PTEN expression. However, PTEN expression was detected in 4 (80%) of 5 samples with unmethylated PTEN. In addition, 3 (75%) of 4 primary ameloblastoma cell cultures exhibited an inverse correlation between PTEN promoter methylation and PTEN transcription level.CONCLUSIONS:
PTEN promoter methylation is found in a number of ameloblastomas but not significantly correlated with loss of PTEN expression. Genetic or epigenetic mechanisms other than PTEN promoter methylation may contribute to PTEN inactivation in ameloblastoma tumor cellsRESUMEN
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Texto completo:
Disponível
Coleções:
Bases de dados nacionais
/
Espanha
Base de dados:
IBECS
Assunto principal:
Ameloblastoma
/
Neoplasias Maxilomandibulares
/
PTEN Fosfo-Hidrolase
/
Metilação
Limite:
Adolescente
/
Adulto
/
Idoso
/
Criança
/
Feminino
/
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Med. oral patol. oral cir. bucal (Internet)
Ano de publicação:
2020
Tipo de documento:
Artigo
Instituição/País de afiliação:
Chulalongkorn University/Thailand
/
Mahidol University/Thailand