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.
Article
em Zh
| WPRIM
| ID: wpr-320168
Biblioteca responsável:
WPRO
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>
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Base de dados:
WPRIM
Assunto principal:
Óxidos
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Patologia
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Farmacologia
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Arsenicais
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Azacitidina
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RNA Mensageiro
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Neoplasias Esofágicas
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Carcinoma de Células Escamosas
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Regulação Neoplásica da Expressão Gênica
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Éxons
Limite:
Humans
Idioma:
Zh
Revista:
Chinese Journal of Oncology
Ano de publicação:
2011
Tipo de documento:
Article