Expression of DNMTs and genomic DNA methylation in gastric signet ring cell carcinoma

  • Authors:
    • Miao He
    • Jing Fan
    • Rong Jiang
    • Wei‑Xue Tang
    • Zi‑Wei Wang
  • View Affiliations

  • Published online on: July 2, 2013     https://doi.org/10.3892/mmr.2013.1566
  • Pages: 942-948
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Abstract

The aim of the present study was to investigate the protein expression of DNA methyltransferases (DNMTs) and genomic DNA methylation status of genomes in gastric signet ring cell carcinoma (SRC). Immunohistochemistry was performed to analyze DNMT expression and methylated DNA immunoprecipitation microarray (MeDIP‑chip) and MeDIP quantitative real‑time PCR (MeDIP‑qPCR) were performed to analyze the genomic DNA methylation status in gastric SRC tissue. An increase in DNMT1 and decrease in DNMT3A expression in SRC tissue was observed compared with matched non‑cancerous tissue. However, expression of other DNMTs, DNMT2, DNMT3B and DNMT3L, was not found to differ significantly between carcinoma and control. The MeDIP‑chip assay revealed that methylation of gene promoters and CpG islands in SRC was higher than those in matched control tissue. However, MeDIP‑qPCR analysis demonstrated that specific tumor‑related genes, including ABL2, FGF18, TRAF2, EGFL7 and RAB33A were aberrantly hypomethylated in SRC tissue. Results of the current study indicate that gastric SRC may produce complex patterns of aberrant DNA methylation and DNMT expression.
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September 2013
Volume 8 Issue 3

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Spandidos Publications style
He M, Fan J, Jiang R, Tang WX and Wang ZW: Expression of DNMTs and genomic DNA methylation in gastric signet ring cell carcinoma. Mol Med Rep 8: 942-948, 2013
APA
He, M., Fan, J., Jiang, R., Tang, W., & Wang, Z. (2013). Expression of DNMTs and genomic DNA methylation in gastric signet ring cell carcinoma. Molecular Medicine Reports, 8, 942-948. https://doi.org/10.3892/mmr.2013.1566
MLA
He, M., Fan, J., Jiang, R., Tang, W., Wang, Z."Expression of DNMTs and genomic DNA methylation in gastric signet ring cell carcinoma". Molecular Medicine Reports 8.3 (2013): 942-948.
Chicago
He, M., Fan, J., Jiang, R., Tang, W., Wang, Z."Expression of DNMTs and genomic DNA methylation in gastric signet ring cell carcinoma". Molecular Medicine Reports 8, no. 3 (2013): 942-948. https://doi.org/10.3892/mmr.2013.1566