Demethylation in the promoter area by the antisense of human DNA MTase gene / 中华肿瘤杂志
Chinese Journal of Oncology
;
(12): 444-447, 2002.
Artigo
em Chinês
| WPRIM
| ID: wpr-301992
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the change in the expression of E-Cadherin of human hepatocarcinoma cell line SMMC-7721 after transfection by antisense human DNA MTase gene.</p><p><b>METHODS</b>DNA MTase gene eukaryotic expression vectors, including sense and antisense fragments, were constructed with recombinant technology and transfected into the hepatocarcinoma cell line SMMC-7721 with liposome DOTAP. The expression of DNA MTase gene mRNA and E-Cadherin gene mRNA was examined with RT-PCR and the expression of E-Cadherin with immunohistochemical and flow cytometry. The status of methylation in E-Cadherin gene promoter area was examined with methylation specific PCR (MSP).</p><p><b>RESULTS</b>The sense and antisense eukaryotic expression vectors were successfully constructed and then the constructed recombinant plasmids were successfully transfected into SMMC-7721 cell with liposome DOTAP. The expression of endogenous DNA MTase mRNA was obviously decreased with E-Cadherin gene mRNA and its activity increased in the SMMC-7721 cell, which was tranfected with antisense DNA MTase gene fragment. Moreover, demethylation in the promoter area of E-Cadherin gene was observed with MSP.</p><p><b>CONCLUSION</b>Demethylation in the promoter area and increasing mRNA level of E-Cadherin gene can be induced by expression inhibition of DNA MTase gene of SMMC-7721 cell line.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Patologia
/
Farmacologia
/
DNA
/
RNA Mensageiro
/
Células Tumorais Cultivadas
/
Transfecção
/
Metilases de Modificação do DNA
/
Caderinas
/
Expressão Gênica
/
DNA Antissenso
Limite:
Humanos
Idioma:
Chinês
Revista:
Chinese Journal of Oncology
Ano de publicação:
2002
Tipo de documento:
Artigo
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