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Article

PD‑0332991 induces G1 arrest of colorectal carcinoma cells through inhibition of the cyclin‑dependent kinase‑6 and retinoblastoma protein axis

  • Authors:
    • Chunsheng Li
    • Ling Qi
    • Anita C. Bellail
    • Chunhai Hao
    • Tongjun Liu
  • View Affiliations / Copyright

    Affiliations: Department of Colorectal Surgery, The Third Hospital of Jilin University, Changchun, Jilin 130033, P.R. China, Department of Pathology, Jilin Medical College, Jilin, Jilin 132013, P.R. China, Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montreal H3A 2B4, Canada, Department of Pathology, Montreal Neurological Institute, McGill University, Montreal H3A 2B4, Canada
  • Pages: 1673-1678
    |
    Published online on: March 10, 2014
       https://doi.org/10.3892/ol.2014.1957
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Abstract

Preclinical and clinical studies have demonstrated the anticancer activity of PD‑0332991, a selective cyclin‑dependent kinase 4/6 (CDK4/6) inhibitor, in the treatment of various types of cancer in a retinoblastoma protein (RB)‑dependent manner. However, it remains unclear whether CDK4, CDK6 or both are required for RB phosphorylation in colorectal carcinoma and thus PD‑0332991 can be used to target this CDK‑RB axis for the cancer therapy. The aim of this study was to determine whether CDK4, CDK6 and phosphorylated RB proteins were overexpressed in colorectal carcinoma tissues as compared to matched normal colorectal tissues. The results showed that knockdown of CDK6 but not CDK4 reduced RB phosphorylation and inhibited carcinoma cell growth. Thus, CDK6 plays a critical role in RB phosphorylation and cancer growth. PD‑0332991 treatment blocked RB phosphorylation and inhibited cell growth through the induction of G1 arrest of colorectal carcinoma cells. The results demonstrated that, by targeting of CDK6‑RB axis, PD‑0332991 may prove to be a novel therapeutic agent in treating colorectal carcinoma.
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Copy and paste a formatted citation
Spandidos Publications style
Li C, Qi L, Bellail AC, Hao C and Liu T: PD‑0332991 induces G1 arrest of colorectal carcinoma cells through inhibition of the cyclin‑dependent kinase‑6 and retinoblastoma protein axis. Oncol Lett 7: 1673-1678, 2014.
APA
Li, C., Qi, L., Bellail, A.C., Hao, C., & Liu, T. (2014). PD‑0332991 induces G1 arrest of colorectal carcinoma cells through inhibition of the cyclin‑dependent kinase‑6 and retinoblastoma protein axis. Oncology Letters, 7, 1673-1678. https://doi.org/10.3892/ol.2014.1957
MLA
Li, C., Qi, L., Bellail, A. C., Hao, C., Liu, T."PD‑0332991 induces G1 arrest of colorectal carcinoma cells through inhibition of the cyclin‑dependent kinase‑6 and retinoblastoma protein axis". Oncology Letters 7.5 (2014): 1673-1678.
Chicago
Li, C., Qi, L., Bellail, A. C., Hao, C., Liu, T."PD‑0332991 induces G1 arrest of colorectal carcinoma cells through inhibition of the cyclin‑dependent kinase‑6 and retinoblastoma protein axis". Oncology Letters 7, no. 5 (2014): 1673-1678. https://doi.org/10.3892/ol.2014.1957
Copy and paste a formatted citation
x
Spandidos Publications style
Li C, Qi L, Bellail AC, Hao C and Liu T: PD‑0332991 induces G1 arrest of colorectal carcinoma cells through inhibition of the cyclin‑dependent kinase‑6 and retinoblastoma protein axis. Oncol Lett 7: 1673-1678, 2014.
APA
Li, C., Qi, L., Bellail, A.C., Hao, C., & Liu, T. (2014). PD‑0332991 induces G1 arrest of colorectal carcinoma cells through inhibition of the cyclin‑dependent kinase‑6 and retinoblastoma protein axis. Oncology Letters, 7, 1673-1678. https://doi.org/10.3892/ol.2014.1957
MLA
Li, C., Qi, L., Bellail, A. C., Hao, C., Liu, T."PD‑0332991 induces G1 arrest of colorectal carcinoma cells through inhibition of the cyclin‑dependent kinase‑6 and retinoblastoma protein axis". Oncology Letters 7.5 (2014): 1673-1678.
Chicago
Li, C., Qi, L., Bellail, A. C., Hao, C., Liu, T."PD‑0332991 induces G1 arrest of colorectal carcinoma cells through inhibition of the cyclin‑dependent kinase‑6 and retinoblastoma protein axis". Oncology Letters 7, no. 5 (2014): 1673-1678. https://doi.org/10.3892/ol.2014.1957
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