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Article

Inhibition of transforming growth factor-β release from tumor cells reduces their motility associated with epithelial-mesenchymal transition

  • Authors:
    • Yasuhiko Ohshio
    • Koji Teramoto
    • Masayuki Hashimoto
    • Shoji Kitamura
    • Jun Hanaoka
    • Keiichi Kontani
  • View Affiliations / Copyright

    Affiliations: Department of Surgery, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan, Department of Respiratory, Breast and Endocrine Surgery, Kagawa University Faculty of Medicine, Kita-gun, Kagawa 561-0793, Japan
  • Pages: 1000-1006
    |
    Published online on: May 28, 2013
       https://doi.org/10.3892/or.2013.2505
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Abstract

The high level of transforming growth factor‑β (TGF‑β) in tumor tissue, which is primarily released from tumor cells, helps maintain their metastatic nature and exacerbates the creation of a pro-tumor microenvironment. Although the strategy of targeting TGF‑β in cancer therapy has shown promise, its effects remain limited. In the present study, we focused on tumor cells as sources of TGF‑β release, and hypothesized that inhibition of their TGF‑β release could suppress their epithelial-mesenchymal transition (EMT)-associated metastatic nature and inactivate the induction of suppressor immune cells. To investigate this hypothesis, LLC1 cells, a mouse lung cancer cell line, were cultured with the TGF‑β release inhibitor tranilast and the motility of LLC1 cells was examined. Furthermore, to examine whether inhibition of TGF‑β release influences the induction of regulatory T (Treg) cells, spleen cells from normal mice were cultured in medium in which LLC1 cells had been cultured with tranilast. The results showed that tranilast inhibited the release of TGF‑β1 from LLC1 cells without affecting their proliferation. Inhibition of TGF‑β1 release suppressed the invasive activity of LLC1 cells, but enhanced their activity to adhere. mRNA levels of Slug and Twist were decreased in LLC1 cells, whereas levels of E‑cadherin were recovered. Treg cells were less frequently induced by medium in which LLC1 cells had been cultured with tranilast. Taken together, inhibition of TGF‑β1 release dampens the metastatic nature of LLC1 cells through the downregulation of EMT and possesses the possibility to improve antitumor immune responses through suppression of Treg cell induction. These findings provide a new rationale for development of TGF‑β‑targeted molecular immunotherapy against cancer.
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Copy and paste a formatted citation
Spandidos Publications style
Ohshio Y, Teramoto K, Hashimoto M, Kitamura S, Hanaoka J and Kontani K: Inhibition of transforming growth factor-β release from tumor cells reduces their motility associated with epithelial-mesenchymal transition. Oncol Rep 30: 1000-1006, 2013.
APA
Ohshio, Y., Teramoto, K., Hashimoto, M., Kitamura, S., Hanaoka, J., & Kontani, K. (2013). Inhibition of transforming growth factor-β release from tumor cells reduces their motility associated with epithelial-mesenchymal transition. Oncology Reports, 30, 1000-1006. https://doi.org/10.3892/or.2013.2505
MLA
Ohshio, Y., Teramoto, K., Hashimoto, M., Kitamura, S., Hanaoka, J., Kontani, K."Inhibition of transforming growth factor-β release from tumor cells reduces their motility associated with epithelial-mesenchymal transition". Oncology Reports 30.2 (2013): 1000-1006.
Chicago
Ohshio, Y., Teramoto, K., Hashimoto, M., Kitamura, S., Hanaoka, J., Kontani, K."Inhibition of transforming growth factor-β release from tumor cells reduces their motility associated with epithelial-mesenchymal transition". Oncology Reports 30, no. 2 (2013): 1000-1006. https://doi.org/10.3892/or.2013.2505
Copy and paste a formatted citation
x
Spandidos Publications style
Ohshio Y, Teramoto K, Hashimoto M, Kitamura S, Hanaoka J and Kontani K: Inhibition of transforming growth factor-β release from tumor cells reduces their motility associated with epithelial-mesenchymal transition. Oncol Rep 30: 1000-1006, 2013.
APA
Ohshio, Y., Teramoto, K., Hashimoto, M., Kitamura, S., Hanaoka, J., & Kontani, K. (2013). Inhibition of transforming growth factor-β release from tumor cells reduces their motility associated with epithelial-mesenchymal transition. Oncology Reports, 30, 1000-1006. https://doi.org/10.3892/or.2013.2505
MLA
Ohshio, Y., Teramoto, K., Hashimoto, M., Kitamura, S., Hanaoka, J., Kontani, K."Inhibition of transforming growth factor-β release from tumor cells reduces their motility associated with epithelial-mesenchymal transition". Oncology Reports 30.2 (2013): 1000-1006.
Chicago
Ohshio, Y., Teramoto, K., Hashimoto, M., Kitamura, S., Hanaoka, J., Kontani, K."Inhibition of transforming growth factor-β release from tumor cells reduces their motility associated with epithelial-mesenchymal transition". Oncology Reports 30, no. 2 (2013): 1000-1006. https://doi.org/10.3892/or.2013.2505
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