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Aberrant methylation of integrin alpha4 gene in human gastric cancer cells.

Abstract：

:Integrins are adhesion receptors that mediate both cell-extracellular matrix and cell-cell interactions. It has also been reported that the loss of integrin alpha4 expression might be associated with metastasis in several cancers. However, the molecular mechanism for loss of their expression in cancers has not been explored. In the present study, we found that the integrin alpha4 expression is lost in human gastric cancer cell lines and that this is recovered by treatment with DNA methyltransferase inhibitor, implying transcriptional silencing by DNA methylation. Methylation-specific PCR (MSP) and bisulfite genomic DNA sequencing demonstrated the CpG methylation-dependent silencing of integrin alpha4 expression in eight of nine (88.8%) gastric cancer cell lines and in 84.7% of 46 primary tumors. We also investigated whether the restoration of integrin alpha4 in integrin alpha4-inactivated cells affects their ability to invade extracellular matrix, using matrigel assays. Interestingly, integrin alpha4-stable transfectants had markedly less invasive ability than the parental cells. Taken together, these results suggest that the transcriptional repression of the integrin alpha4 gene is caused by aberrant DNA methylation, and that this may play an important role in human gastric carcinogenesis.

journal_name

Oncogene

journal_title

Oncogene

authors

Park J,Song SH,Kim TY,Choi MC,Jong HS,Kim TY,Lee JW,Kim NK,Kim WH,Bang YJ

doi

10.1038/sj.onc.1207470

subject

Has Abstract

pub_date

2004-04-22 00:00:00

pages

3474-80

issue

19

eissn

0950-9232

issn

1476-5594

pii

1207470

journal_volume

23

pub_type

杂志文章

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