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Article

Integrin β4 and vinculin contained in exosomes are potential markers for progression of prostate cancer associated with taxane-resistance

  • Authors:
    • Kyojiro Kawakami
    • Yasunori Fujita
    • Taku Kato
    • Kosuke Mizutani
    • Koji Kameyama
    • Hiroki Tsumoto
    • Yuri Miura
    • Takashi Deguchi
    • Masafumi Ito
  • View Affiliations / Copyright

    Affiliations: Research Team for Mechanism of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo 173-0015, Japan, Department of Urology, Gifu University Graduate School of Medicine, Gifu, Gifu 501-1193, Japan
  • Pages: 384-390
    |
    Published online on: May 18, 2015
       https://doi.org/10.3892/ijo.2015.3011
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Abstract

Treatment with taxanes for castration-resistant prostate cancer often leads to the development of resistance. It has been recently demonstrated that exosomes present in the body fluids contain proteins and RNAs in the cells from which they are derived and could serve as a diagnostic marker for various diseases. In the present study, we aimed to identify proteins contained in exosomes that could be markers for progression and taxane-resistance of prostate cancer. Exosomes were isolated by differential centrifugation from the culture medium of taxane-resistant human prostate cancer PC-3 cells (PC-3R) and their parental PC-3 cells. Isolated exosomes were subjected to iTRAQ-based quantitative proteomic analysis. Exosomes were also isolated from the culture medium by using anti-CD9 antibody-conjugated magnetic beads. Protein expression was knocked down by siRNA transfection followed by analysis of the silencing effects. Proteomic analysis showed that integrin β4 (ITGB4) and vinculin (VCL) were upregulated in exosomes derived from PC-3R cells compared to PC-3 cells. The elevation of ITGB4 and VCL was confirmed in exosomes captured by anti-CD9 antibody from the culture medium of PC-3R cells. Silencing of ITGB4 and VCL expression did not affect proliferation and taxane-resistance of PC-3R cells, but ITGB4 knockdown attenuated both cell migration and invasion and VCL knockdown reduced invasion. Our results suggest that ITGB4 and VCL in exosomes could be useful markers for progression of prostate cancer associated with taxane-resistance, providing the basis for development of an exosome-based diagnostic system.
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Copy and paste a formatted citation
Spandidos Publications style
Kawakami K, Fujita Y, Kato T, Mizutani K, Kameyama K, Tsumoto H, Miura Y, Deguchi T and Ito M: Integrin β4 and vinculin contained in exosomes are potential markers for progression of prostate cancer associated with taxane-resistance. Int J Oncol 47: 384-390, 2015.
APA
Kawakami, K., Fujita, Y., Kato, T., Mizutani, K., Kameyama, K., Tsumoto, H. ... Ito, M. (2015). Integrin β4 and vinculin contained in exosomes are potential markers for progression of prostate cancer associated with taxane-resistance. International Journal of Oncology, 47, 384-390. https://doi.org/10.3892/ijo.2015.3011
MLA
Kawakami, K., Fujita, Y., Kato, T., Mizutani, K., Kameyama, K., Tsumoto, H., Miura, Y., Deguchi, T., Ito, M."Integrin β4 and vinculin contained in exosomes are potential markers for progression of prostate cancer associated with taxane-resistance". International Journal of Oncology 47.1 (2015): 384-390.
Chicago
Kawakami, K., Fujita, Y., Kato, T., Mizutani, K., Kameyama, K., Tsumoto, H., Miura, Y., Deguchi, T., Ito, M."Integrin β4 and vinculin contained in exosomes are potential markers for progression of prostate cancer associated with taxane-resistance". International Journal of Oncology 47, no. 1 (2015): 384-390. https://doi.org/10.3892/ijo.2015.3011
Copy and paste a formatted citation
x
Spandidos Publications style
Kawakami K, Fujita Y, Kato T, Mizutani K, Kameyama K, Tsumoto H, Miura Y, Deguchi T and Ito M: Integrin β4 and vinculin contained in exosomes are potential markers for progression of prostate cancer associated with taxane-resistance. Int J Oncol 47: 384-390, 2015.
APA
Kawakami, K., Fujita, Y., Kato, T., Mizutani, K., Kameyama, K., Tsumoto, H. ... Ito, M. (2015). Integrin β4 and vinculin contained in exosomes are potential markers for progression of prostate cancer associated with taxane-resistance. International Journal of Oncology, 47, 384-390. https://doi.org/10.3892/ijo.2015.3011
MLA
Kawakami, K., Fujita, Y., Kato, T., Mizutani, K., Kameyama, K., Tsumoto, H., Miura, Y., Deguchi, T., Ito, M."Integrin β4 and vinculin contained in exosomes are potential markers for progression of prostate cancer associated with taxane-resistance". International Journal of Oncology 47.1 (2015): 384-390.
Chicago
Kawakami, K., Fujita, Y., Kato, T., Mizutani, K., Kameyama, K., Tsumoto, H., Miura, Y., Deguchi, T., Ito, M."Integrin β4 and vinculin contained in exosomes are potential markers for progression of prostate cancer associated with taxane-resistance". International Journal of Oncology 47, no. 1 (2015): 384-390. https://doi.org/10.3892/ijo.2015.3011
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