Mechanism of loss of human esophageal cancer-related gene 4 (ECRG4) gene expression in esophageal squamous cell carcinoma cell line EC9706 / 中华肿瘤杂志
Chinese Journal of Oncology
;
(12): 570-573, 2011.
Artigo
em Chinês
| WPRIM
| ID: wpr-320168
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the mechanism of loss of human esophageal cancer-related gene 4 (ECRG4) expression in esophageal squamous cell carcinoma (ESCC.)</p><p><b>METHODS</b>PCR-SSCP and DNA sequencing analysis were used to detect the mutation of ECRG4 exons in esophageal cancer and matched adjacent normal tissues of 80 patients. DNA bisulfite-modifying ssPCR sequencing assay was used to examine the methylation status of ECRG4 promoter in human esophageal squamous cell carcinoma EC9706 cells. The re-expression of ECRG4 mRNA was examined by RT-PCR in EC9706 cells, after treatment with either demethylation drug 5-aza-2'-deoxycytidine or arsenic trioxide.</p><p><b>RESULTS</b>No mutation in the four ECRG4 exons was found in all the ESCC and matched normal adjacent tissues. RT-PCR showed that 11 of 16 CpG islands of ECRG4 promoter were hypermethylated, while ECRG4 mRNA expression level was undetectable in the EC9706 cells. The ECRG4 mRNA was re-expressed after treatment with either demethylation drug 5-aza-2'-deoxycytidine or arsenic trioxide.</p><p><b>CONCLUSION</b>The epigenetic mechanism of methylation is a reason of loss of ECRG4 gene expression in the ESCC cell line EC9706.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Óxidos
/
Patologia
/
Farmacologia
/
Arsenicais
/
Azacitidina
/
RNA Mensageiro
/
Neoplasias Esofágicas
/
Carcinoma de Células Escamosas
/
Regulação Neoplásica da Expressão Gênica
/
Éxons
Limite:
Humanos
Idioma:
Chinês
Revista:
Chinese Journal of Oncology
Ano de publicação:
2011
Tipo de documento:
Artigo
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