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Article

Protein inhibitor of activated STAT xα depresses cyclin D and cyclin D kinase, and contributes to the inhibition of osteosarcoma cell progression

  • Authors:
    • Junjie Wang
    • Jiangdong Ni
    • Shuai Yi
    • Deye Song
    • Muliang Ding
  • View Affiliations / Copyright

    Affiliations: Department of Orthopedics, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, P.R. China, Department of Ophthalmology, Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, P.R. China
  • Pages: 1645-1652
    |
    Published online on: December 22, 2015
       https://doi.org/10.3892/mmr.2015.4705
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Abstract

Previous studies have shown that protein inhibitor of activated STAT (PIAs)xα is crucial in protein sumoylation and is associated with cancer cell progression. However, the mechanism underlying the inhibitory effect on cancer cells, which may assist in developing novel treatment strategies in cancer remains to be elucidated. In present study, the expression levels of PIAsxα from tissue samples of osteosarcoma and adjacent tissues from 25 patients were analyzed using reverse transcription‑quantitative polymerase chain reaction, western blot and immunohistochemical analyses. In addition, techniques using an overexpression vector and small interfering (si)RNAs were used to examine the effect of PIAsxα on osteosarcoma cells. Finally, using xenograft U2‑OS osteosarcoma cells overexpressing PIAsxα, the effect of PIAsxα on osteosarcoma formation was determined. The results revealed low expression of PIAsxα in osteosarcoma tissues. In addition, following overexpression of PIAsxα, the apoptotic rates were significantly increased. The rate of G2/M arrest was at the highest level in the overexpression group, compared with other groups assessed. Furthermore, the expression levels of cyclin D1 and cyclin D3 were inhibited following PIAsxα increase, indicating the repressive effects of PIAsxα on cell cycle. Accordingly, cyclin D kinase (CDK) genes, including CDK4, CDK6 and CDK8, increased markedly following treatment with PIAsxα siRNAs. The expression levels of CDK4, CDK6 and CDK8 decreased significantly in the overexpression group, compared to the other groups. Furthermore, high expression levels of PIAsxα inhibited tumor formation in a nude mouse model. Taken together, these findings provide evidence for the effects of PIAsxα and its mechanism on osteosarcoma progression, which offers novel insight into sumoylation and the cell cycle in osteosarcoma.
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Copy and paste a formatted citation
Spandidos Publications style
Wang J, Ni J, Yi S, Song D and Ding M: Protein inhibitor of activated STAT xα depresses cyclin D and cyclin D kinase, and contributes to the inhibition of osteosarcoma cell progression. Mol Med Rep 13: 1645-1652, 2016.
APA
Wang, J., Ni, J., Yi, S., Song, D., & Ding, M. (2016). Protein inhibitor of activated STAT xα depresses cyclin D and cyclin D kinase, and contributes to the inhibition of osteosarcoma cell progression. Molecular Medicine Reports, 13, 1645-1652. https://doi.org/10.3892/mmr.2015.4705
MLA
Wang, J., Ni, J., Yi, S., Song, D., Ding, M."Protein inhibitor of activated STAT xα depresses cyclin D and cyclin D kinase, and contributes to the inhibition of osteosarcoma cell progression". Molecular Medicine Reports 13.2 (2016): 1645-1652.
Chicago
Wang, J., Ni, J., Yi, S., Song, D., Ding, M."Protein inhibitor of activated STAT xα depresses cyclin D and cyclin D kinase, and contributes to the inhibition of osteosarcoma cell progression". Molecular Medicine Reports 13, no. 2 (2016): 1645-1652. https://doi.org/10.3892/mmr.2015.4705
Copy and paste a formatted citation
x
Spandidos Publications style
Wang J, Ni J, Yi S, Song D and Ding M: Protein inhibitor of activated STAT xα depresses cyclin D and cyclin D kinase, and contributes to the inhibition of osteosarcoma cell progression. Mol Med Rep 13: 1645-1652, 2016.
APA
Wang, J., Ni, J., Yi, S., Song, D., & Ding, M. (2016). Protein inhibitor of activated STAT xα depresses cyclin D and cyclin D kinase, and contributes to the inhibition of osteosarcoma cell progression. Molecular Medicine Reports, 13, 1645-1652. https://doi.org/10.3892/mmr.2015.4705
MLA
Wang, J., Ni, J., Yi, S., Song, D., Ding, M."Protein inhibitor of activated STAT xα depresses cyclin D and cyclin D kinase, and contributes to the inhibition of osteosarcoma cell progression". Molecular Medicine Reports 13.2 (2016): 1645-1652.
Chicago
Wang, J., Ni, J., Yi, S., Song, D., Ding, M."Protein inhibitor of activated STAT xα depresses cyclin D and cyclin D kinase, and contributes to the inhibition of osteosarcoma cell progression". Molecular Medicine Reports 13, no. 2 (2016): 1645-1652. https://doi.org/10.3892/mmr.2015.4705
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