Anti-invasive effects of decitabine, a DNA methyltransferase inhibitor, through tightening of tight junctions and inhibition of matrix metalloproteinase activities in AGS human gastric carcinoma cells

  • Authors:
    • Dong Yeok Shin
    • Gi-Young Kim
    • Chan Gil Kim
    • Wun-Jae Kim
    • Ho Sung Kang
    • Yung Hyun Choi
  • View Affiliations

  • Published online on: June 12, 2012     https://doi.org/10.3892/or.2012.1858
  • Pages: 1043-1050
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Abstract

The DNA methyltransferase inhibitor decitabine, 5-Aza-2'-deoxycytidine, possesses anti-metabolic and anticancer activities in various cancer cells. However, the biochemical mechanisms underlying decitabine-induced inhibition of invasiveness and metastasis have not been thoroughly studied. In this study, we investigated the effect of decitabine on the correlation between tightening of tight junctions (TJs) and anti-invasive activity in AGS human gastric cancer cells. Our data indicated that the inhibitory effects of decitabine on cell motility and invasiveness were associated with increased tightness of the TJ, which was demonstrated by an increase in transepithelial electrical resistance (TER). Immunoblotting results indicated that decitabine repressed the levels of the claudin proteins, major components of TJs that play a key role in the control and selectivity of paracellular transport. Furthermore, matrix metalloproteinase (MMP)-2 and -9 activity in the AGS cells was dose-dependently inhibited by treatment with decitabine, and this was correlated with a decrease in mRNA and protein expression. In addition, these effects were related to inactivation of the phosphoinositide 3-kinase (PI3K)/Akt pathway in AGS cells. In conclusion, this study suggests that TJs and MMPs are critical targets of decitabine-induced inhibition of invasiveness in AGS human gastric cancer cells.
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September 2012
Volume 28 Issue 3

Print ISSN: 1021-335X
Online ISSN:1791-2431

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Spandidos Publications style
Shin DY, Kim G, Kim CG, Kim W, Kang HS and Choi YH: Anti-invasive effects of decitabine, a DNA methyltransferase inhibitor, through tightening of tight junctions and inhibition of matrix metalloproteinase activities in AGS human gastric carcinoma cells. Oncol Rep 28: 1043-1050, 2012.
APA
Shin, D.Y., Kim, G., Kim, C.G., Kim, W., Kang, H.S., & Choi, Y.H. (2012). Anti-invasive effects of decitabine, a DNA methyltransferase inhibitor, through tightening of tight junctions and inhibition of matrix metalloproteinase activities in AGS human gastric carcinoma cells. Oncology Reports, 28, 1043-1050. https://doi.org/10.3892/or.2012.1858
MLA
Shin, D. Y., Kim, G., Kim, C. G., Kim, W., Kang, H. S., Choi, Y. H."Anti-invasive effects of decitabine, a DNA methyltransferase inhibitor, through tightening of tight junctions and inhibition of matrix metalloproteinase activities in AGS human gastric carcinoma cells". Oncology Reports 28.3 (2012): 1043-1050.
Chicago
Shin, D. Y., Kim, G., Kim, C. G., Kim, W., Kang, H. S., Choi, Y. H."Anti-invasive effects of decitabine, a DNA methyltransferase inhibitor, through tightening of tight junctions and inhibition of matrix metalloproteinase activities in AGS human gastric carcinoma cells". Oncology Reports 28, no. 3 (2012): 1043-1050. https://doi.org/10.3892/or.2012.1858