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September 2012 Volume 28 Issue 3

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Article

Tetramethylpyrazine-mediated suppression of C6 gliomas involves inhibition of chemokine receptor CXCR4 expression

  • Authors:
    • Keming Yu
    • Zhao Chen
    • Xueke Pan
    • Ying Yang
    • Sijia Tian
    • Jing Zhang
    • Jian Ge
    • Bala Ambati
    • Jing Zhuang
  • View Affiliations / Copyright

    Affiliations: State Key Laboratory of Ophthalmology, Sun Yat-sen University, Guangzhou 510060, P.R. China, Department of Ophthalmology, Moran Eye Center, University of Utah, UT 84132, USA
  • Pages: 955-960
    |
    Published online on: June 14, 2012
       https://doi.org/10.3892/or.2012.1866
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Abstract

Tetramethylpyrazine (TMP) is the major component extracted from the Chinese herb Chuanxiong. Increasing numbers of studies have indicated that tetramethylpyrazine hydrochloride (TMPH) has anticancer effects. However, the molecular mechanisms underlying the actions of TMPH have not been fully elucidated. In this study, using real-time RT-PCR and western blot techniques, we demonstrate that TMPH significantly downregulates the expression of the chemokine receptor CXCR4 in C6 glioma cells. Consistent with a role for CXCR4 in cancer development, TMPH inhibits the migration, proliferation and colony formation of C6 glioma cells in vitro more effectively than the CXCR4 antagonist AMD3100. Interestingly, TMPH does not affect the cell cycle when the cells are grown to 50-80% confluency but induces S-phase arrest at 100% confluency, as indicated by a significant reduction in the G1 and G2 populations. These findings were also confirmed in vivo. Rats were implanted with C6 glioma cells and treated with 100 mg/kg TMPH for 20 days. Our data show that tumour growth was significantly inhibited in rats treated with TMPH (4.14±2.81 mm3) compared with tumour growth in control rats (55.9±14.12 mm3). Microcirculation in the implants was sparser in the TMPH-treated rats than that in the control rats, as measured by FITC-dextran staining. Consistent with the in vitro results, TMPH significantly downregulated the expression of CXCR4 in C6 glioma implantation compared with the control. This study provides new insights into the mechanisms of the TMPH anticancer effects.
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Copy and paste a formatted citation
Spandidos Publications style
Yu K, Chen Z, Pan X, Yang Y, Tian S, Zhang J, Ge J, Ambati B and Zhuang J: Tetramethylpyrazine-mediated suppression of C6 gliomas involves inhibition of chemokine receptor CXCR4 expression. Oncol Rep 28: 955-960, 2012.
APA
Yu, K., Chen, Z., Pan, X., Yang, Y., Tian, S., Zhang, J. ... Zhuang, J. (2012). Tetramethylpyrazine-mediated suppression of C6 gliomas involves inhibition of chemokine receptor CXCR4 expression. Oncology Reports, 28, 955-960. https://doi.org/10.3892/or.2012.1866
MLA
Yu, K., Chen, Z., Pan, X., Yang, Y., Tian, S., Zhang, J., Ge, J., Ambati, B., Zhuang, J."Tetramethylpyrazine-mediated suppression of C6 gliomas involves inhibition of chemokine receptor CXCR4 expression". Oncology Reports 28.3 (2012): 955-960.
Chicago
Yu, K., Chen, Z., Pan, X., Yang, Y., Tian, S., Zhang, J., Ge, J., Ambati, B., Zhuang, J."Tetramethylpyrazine-mediated suppression of C6 gliomas involves inhibition of chemokine receptor CXCR4 expression". Oncology Reports 28, no. 3 (2012): 955-960. https://doi.org/10.3892/or.2012.1866
Copy and paste a formatted citation
x
Spandidos Publications style
Yu K, Chen Z, Pan X, Yang Y, Tian S, Zhang J, Ge J, Ambati B and Zhuang J: Tetramethylpyrazine-mediated suppression of C6 gliomas involves inhibition of chemokine receptor CXCR4 expression. Oncol Rep 28: 955-960, 2012.
APA
Yu, K., Chen, Z., Pan, X., Yang, Y., Tian, S., Zhang, J. ... Zhuang, J. (2012). Tetramethylpyrazine-mediated suppression of C6 gliomas involves inhibition of chemokine receptor CXCR4 expression. Oncology Reports, 28, 955-960. https://doi.org/10.3892/or.2012.1866
MLA
Yu, K., Chen, Z., Pan, X., Yang, Y., Tian, S., Zhang, J., Ge, J., Ambati, B., Zhuang, J."Tetramethylpyrazine-mediated suppression of C6 gliomas involves inhibition of chemokine receptor CXCR4 expression". Oncology Reports 28.3 (2012): 955-960.
Chicago
Yu, K., Chen, Z., Pan, X., Yang, Y., Tian, S., Zhang, J., Ge, J., Ambati, B., Zhuang, J."Tetramethylpyrazine-mediated suppression of C6 gliomas involves inhibition of chemokine receptor CXCR4 expression". Oncology Reports 28, no. 3 (2012): 955-960. https://doi.org/10.3892/or.2012.1866
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