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Article

Thoc1 inhibits cell growth via induction of cell cycle arrest and apoptosis in lung cancer cells

  • Authors:
    • Jianmei Wan
    • Shitao Zou
    • Mengshang Hu
    • Ran Zhu
    • Jiaying Xu
    • Yang Jiao
    • Saijun Fan
  • View Affiliations / Copyright

    Affiliations: School of Radiation Medicine and Protection, Medical College, Soochow University, Suzhou, Jiangsu 215123, P.R. China, Oncology Institute, Wuxi Fourth People's Hospital, Wuxi, Jiangsu 214062, P.R. China, Department of Nuclear Medicine, The First Affiliated Hospital, Soochow University, Suzhou, Jiangsu 215123, P.R. China
  • Pages: 2321-2327
    |
    Published online on: March 28, 2014
       https://doi.org/10.3892/mmr.2014.2088
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Abstract

THO complex 1 (Thoc1) is a human nuclear matrix protein that binds to the retinoblastoma tumor suppressor retinoblastoma protein (pRb). While some studies suggest that Thoc1 has characteristics of a tumor suppressor protein, whether Thoc1 can inhibit lung cancer cell growth is not clear. In the present study, we observed that Thoc1 is lowly expressed in the lung cancer cell lines SPC-A1 and NCI-H1975. Then, we investigated the potential effects of Thoc1 on lung cancer cell proliferation, cell cycle and apoptosis after stable transfection of these lines with a Thoc1 expression vector. We found that overexpression of Thoc1 can inhibit cell proliferation, induce G2/M cell cycle arrest and promote apoptosis. Further investigation indicated that overexpression of Thoc1 is involved in the inhibition of cell cycle-related proteins cyclin A1 and B1 and of pro-apoptotic factors Bax and caspase-3. In vivo experiments showed that tumors overexpressing Thoc1 display a slower growth rate than the control xenografts and show reduced expression of the protein Ki-67, which localized on the nuclear membrane. Taken together, our data show that in lung cancer cells, Thoc1 inhibits cell growth through induction of cell cycle arrest and apoptosis. These results indicate that Thoc1 may be used as a novel therapeutic target for human lung cancer treatment.
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Copy and paste a formatted citation
Spandidos Publications style
Wan J, Zou S, Hu M, Zhu R, Xu J, Jiao Y and Fan S: Thoc1 inhibits cell growth via induction of cell cycle arrest and apoptosis in lung cancer cells. Mol Med Rep 9: 2321-2327, 2014.
APA
Wan, J., Zou, S., Hu, M., Zhu, R., Xu, J., Jiao, Y., & Fan, S. (2014). Thoc1 inhibits cell growth via induction of cell cycle arrest and apoptosis in lung cancer cells. Molecular Medicine Reports, 9, 2321-2327. https://doi.org/10.3892/mmr.2014.2088
MLA
Wan, J., Zou, S., Hu, M., Zhu, R., Xu, J., Jiao, Y., Fan, S."Thoc1 inhibits cell growth via induction of cell cycle arrest and apoptosis in lung cancer cells". Molecular Medicine Reports 9.6 (2014): 2321-2327.
Chicago
Wan, J., Zou, S., Hu, M., Zhu, R., Xu, J., Jiao, Y., Fan, S."Thoc1 inhibits cell growth via induction of cell cycle arrest and apoptosis in lung cancer cells". Molecular Medicine Reports 9, no. 6 (2014): 2321-2327. https://doi.org/10.3892/mmr.2014.2088
Copy and paste a formatted citation
x
Spandidos Publications style
Wan J, Zou S, Hu M, Zhu R, Xu J, Jiao Y and Fan S: Thoc1 inhibits cell growth via induction of cell cycle arrest and apoptosis in lung cancer cells. Mol Med Rep 9: 2321-2327, 2014.
APA
Wan, J., Zou, S., Hu, M., Zhu, R., Xu, J., Jiao, Y., & Fan, S. (2014). Thoc1 inhibits cell growth via induction of cell cycle arrest and apoptosis in lung cancer cells. Molecular Medicine Reports, 9, 2321-2327. https://doi.org/10.3892/mmr.2014.2088
MLA
Wan, J., Zou, S., Hu, M., Zhu, R., Xu, J., Jiao, Y., Fan, S."Thoc1 inhibits cell growth via induction of cell cycle arrest and apoptosis in lung cancer cells". Molecular Medicine Reports 9.6 (2014): 2321-2327.
Chicago
Wan, J., Zou, S., Hu, M., Zhu, R., Xu, J., Jiao, Y., Fan, S."Thoc1 inhibits cell growth via induction of cell cycle arrest and apoptosis in lung cancer cells". Molecular Medicine Reports 9, no. 6 (2014): 2321-2327. https://doi.org/10.3892/mmr.2014.2088
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