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International Journal of Oncology
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Print ISSN: 1019-6439 Online ISSN: 1791-2423
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August-2014 Volume 45 Issue 2

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International Journal of Molecular Medicine

International Journal of Molecular Medicine

International Journal of Molecular Medicine is an international journal devoted to molecular mechanisms of human disease.

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International Journal of Oncology is an international journal devoted to oncology research and cancer treatment.

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Covers molecular medicine topics such as pharmacology, pathology, genetics, neuroscience, infectious diseases, molecular cardiology, and molecular surgery.

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Experimental and Therapeutic Medicine is an international journal devoted to laboratory and clinical medicine.

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International journal addressing all aspects of oncology research, from tumorigenesis and oncogenes to chemotherapy and metastasis.

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Article

Klotho suppresses growth and invasion of colon cancer cells through inhibition of IGF1R-mediated PI3K/AKT pathway

  • Authors:
    • Xin-Xiang Li
    • Li-Yong Huang
    • Jun-Jie Peng
    • Lei Liang
    • De-Bing Shi
    • Hong-Tu Zheng
    • San-Jun Cai
  • View Affiliations / Copyright

    Affiliations: Department of Colorectal Surgery, Fudan University Shanghai Cancer Center and Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, P.R. China
  • Pages: 611-618
    |
    Published online on: May 9, 2014
       https://doi.org/10.3892/ijo.2014.2430
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Abstract

Klotho (KL) was originally characterized as an aging suppressor gene, and has been identified as a tumor suppressor gene in a variety of cancers including colon cancer. However, the potential role and molecular events for KL in colon cancer remain unclear. The present study aimed to investigate the expression of KL in human colon cancer by immunohistochemistry, and to analyze the correlation between KL expression and clinicopathological characteristics of patients with colon cancer. Functional analysis after lentivirus-mediated gain of KL expression was used to assess the tumor growth and invasion in colon cancer cells in vitro and in vivo. The rate of KL expression was significantly decreased in cancer tissues compared with that in adjacent non-cancer tissues (ANCT) (60.3 vs.77.9%, P=0.022), and KL expression was negatively associated with Dukes staging (P=0.034) and depth of tumor invasion (P=0.008). Overexpression of KL in vitro inhibited cell proliferative activities and invasive potential in colon cancer cells, companied with decreased expression of p-IGF1R, p-PI3K, p-AKT, PCNA and MMP-2. In addition, the tumor volumes in the HT-29 subcutaneous tumor model treated with lentivirus‑mediated KL vector (Lv-KL) was significantly smaller than those of the negative control (NC) group (P<0.01). Taken together, our findings indicate that the expression of KL is downregulated in human colon caner and correlates with tumor invasion and Dukes staging, while overexpression of KL suppresses growth and invasion through inhibition of IGF1R-mediated PI3K/AKT pathway in colon cancer cells, suggesting that KL may serve as a potential therapeutic target for the treatment of colon cancer.
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Copy and paste a formatted citation
Spandidos Publications style
Li X, Huang L, Peng J, Liang L, Shi D, Zheng H and Cai S: Klotho suppresses growth and invasion of colon cancer cells through inhibition of IGF1R-mediated PI3K/AKT pathway. Int J Oncol 45: 611-618, 2014.
APA
Li, X., Huang, L., Peng, J., Liang, L., Shi, D., Zheng, H., & Cai, S. (2014). Klotho suppresses growth and invasion of colon cancer cells through inhibition of IGF1R-mediated PI3K/AKT pathway. International Journal of Oncology, 45, 611-618. https://doi.org/10.3892/ijo.2014.2430
MLA
Li, X., Huang, L., Peng, J., Liang, L., Shi, D., Zheng, H., Cai, S."Klotho suppresses growth and invasion of colon cancer cells through inhibition of IGF1R-mediated PI3K/AKT pathway". International Journal of Oncology 45.2 (2014): 611-618.
Chicago
Li, X., Huang, L., Peng, J., Liang, L., Shi, D., Zheng, H., Cai, S."Klotho suppresses growth and invasion of colon cancer cells through inhibition of IGF1R-mediated PI3K/AKT pathway". International Journal of Oncology 45, no. 2 (2014): 611-618. https://doi.org/10.3892/ijo.2014.2430
Copy and paste a formatted citation
x
Spandidos Publications style
Li X, Huang L, Peng J, Liang L, Shi D, Zheng H and Cai S: Klotho suppresses growth and invasion of colon cancer cells through inhibition of IGF1R-mediated PI3K/AKT pathway. Int J Oncol 45: 611-618, 2014.
APA
Li, X., Huang, L., Peng, J., Liang, L., Shi, D., Zheng, H., & Cai, S. (2014). Klotho suppresses growth and invasion of colon cancer cells through inhibition of IGF1R-mediated PI3K/AKT pathway. International Journal of Oncology, 45, 611-618. https://doi.org/10.3892/ijo.2014.2430
MLA
Li, X., Huang, L., Peng, J., Liang, L., Shi, D., Zheng, H., Cai, S."Klotho suppresses growth and invasion of colon cancer cells through inhibition of IGF1R-mediated PI3K/AKT pathway". International Journal of Oncology 45.2 (2014): 611-618.
Chicago
Li, X., Huang, L., Peng, J., Liang, L., Shi, D., Zheng, H., Cai, S."Klotho suppresses growth and invasion of colon cancer cells through inhibition of IGF1R-mediated PI3K/AKT pathway". International Journal of Oncology 45, no. 2 (2014): 611-618. https://doi.org/10.3892/ijo.2014.2430
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