HP1β suppresses metastasis of human cancer cells by decreasing the expression and activation of MMP2

  • Authors:
    • Sang Ah Yi
    • Hyun‑Wook Ryu
    • Dong Hoon Lee
    • Jeung‑Whan Han
    • So Hee Kwon
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  • Published online on: September 9, 2014     https://doi.org/10.3892/ijo.2014.2646
  • Pages: 2541-2548
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Abstract

Heterochromatin protein 1 (HP1) is an epigenetic modifier of gene regulation and chromatin packing via binding to trimethylated histone H3 lysine 9 (H3K9). HP1 plays an important role in gene activation as well as gene repression in heterochromatin and euchromatin. However, the role of individual HP1 proteins in human diseases remains elusive. Here, we show that HP1β negatively regulates the expression and activation of matrix metallopeptidase (MMP)2, which mediates cancer metastasis by destructing type Ⅳ collagen. Reduced HP1β expression correlates with the increased level of pro‑ and active‑MMP2 in colon cancer cells. Consistently, HP1β knockdown (KD) increased and HP1β overexpression decreased the mRNA level of MMP2 and membrane type 1 metallopeptidase (MT1‑MMP). Furthermore, cancer cells overexpressing HP1β showed impaired migratory ability, whereas HP1β‑deleted cancer cells had increased migration. HP1β negatively regulates MMP2 expression in a transcriptional level and prevents MMP2 activation through reducing the expression of MT1‑MMP. These findings shed new light on HP1β as a molecular regulator and an efficient therapeutic target of metastatic cancer.
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December-2014
Volume 45 Issue 6

Print ISSN: 1019-6439
Online ISSN:1791-2423

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Spandidos Publications style
Yi SA, Ryu HW, Lee DH, Han JW and Kwon SH: HP1β suppresses metastasis of human cancer cells by decreasing the expression and activation of MMP2. Int J Oncol 45: 2541-2548, 2014
APA
Yi, S.A., Ryu, H., Lee, D.H., Han, J., & Kwon, S.H. (2014). HP1β suppresses metastasis of human cancer cells by decreasing the expression and activation of MMP2. International Journal of Oncology, 45, 2541-2548. https://doi.org/10.3892/ijo.2014.2646
MLA
Yi, S. A., Ryu, H., Lee, D. H., Han, J., Kwon, S. H."HP1β suppresses metastasis of human cancer cells by decreasing the expression and activation of MMP2". International Journal of Oncology 45.6 (2014): 2541-2548.
Chicago
Yi, S. A., Ryu, H., Lee, D. H., Han, J., Kwon, S. H."HP1β suppresses metastasis of human cancer cells by decreasing the expression and activation of MMP2". International Journal of Oncology 45, no. 6 (2014): 2541-2548. https://doi.org/10.3892/ijo.2014.2646