Ectopic expression of the ATP synthase β subunit on the membrane of PC-3M cells supports its potential role in prostate cancer metastasis

  • Authors:
    • Wei Li
    • Yulin Li
    • Gaiyun Li
    • Zilong Zhou
    • Xiaona Chang
    • Yang Xia
    • Xinjie Dong
    • Zhijing Liu
    • Bo Ren
    • Wei Liu
    • Yilei Li
  • View Affiliations

  • Published online on: February 16, 2017     https://doi.org/10.3892/ijo.2017.3878
  • Pages: 1312-1320
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Abstract

Metastatic prostate cancer is associated with high mortality rates. Identification of metastasis-related proteins may facilitate the development of novel therapies for the treatment of metastatic disease. In the present study, we aimed to identify prostate cancer metastasis-associated membrane proteins. We developed a phage-displayed 7-mer peptide library to screen the target peptides that were specifically bound to PC-3M cells with subtractive panning from normal prostate cells and PC-3 prostate cancer cells. A novel short peptide (B04) was found to have high affinity to highly metastatic PC-3M cells. ATP synthase β subunit (ATP5B) was then identified as a binding partner of B04 on the PC-3M cell surface. ATP5B was expressed on the PC-3M cell membrane and on highly malignant human prostate cancer specimens, as shown using multiple methodologies. Furthermore, ATP5B-positive gold particles were detected on the cellular and mitochondrial membranes by immunoelectromicroscopy. These results implied the possibility that ATP5B may translocate from the inner mitochondrial membrane to the outer surface of PC-3M cells. Additional analysis showed that incubation of B04 with PC-3M cells reduced the detection of ATP5B by western blotting and flow cytometry and significantly inhibited the proliferation, invasion and metastasis of PC-3M cells. In conclusion, ATP5B, as a binding partner of a metastasis-related short peptide (B04) on prostate cancer cells, is involved in promoting prostate cancer metastasis. In conclusion, ATP5B may be a promising biomarker and therapeutic target for highly metastatic malignancies.
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April-2017
Volume 50 Issue 4

Print ISSN: 1019-6439
Online ISSN:1791-2423

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Spandidos Publications style
Li W, Li Y, Li G, Zhou Z, Chang X, Xia Y, Dong X, Liu Z, Ren B, Liu W, Liu W, et al: Ectopic expression of the ATP synthase β subunit on the membrane of PC-3M cells supports its potential role in prostate cancer metastasis. Int J Oncol 50: 1312-1320, 2017
APA
Li, W., Li, Y., Li, G., Zhou, Z., Chang, X., Xia, Y. ... Li, Y. (2017). Ectopic expression of the ATP synthase β subunit on the membrane of PC-3M cells supports its potential role in prostate cancer metastasis. International Journal of Oncology, 50, 1312-1320. https://doi.org/10.3892/ijo.2017.3878
MLA
Li, W., Li, Y., Li, G., Zhou, Z., Chang, X., Xia, Y., Dong, X., Liu, Z., Ren, B., Liu, W., Li, Y."Ectopic expression of the ATP synthase β subunit on the membrane of PC-3M cells supports its potential role in prostate cancer metastasis". International Journal of Oncology 50.4 (2017): 1312-1320.
Chicago
Li, W., Li, Y., Li, G., Zhou, Z., Chang, X., Xia, Y., Dong, X., Liu, Z., Ren, B., Liu, W., Li, Y."Ectopic expression of the ATP synthase β subunit on the membrane of PC-3M cells supports its potential role in prostate cancer metastasis". International Journal of Oncology 50, no. 4 (2017): 1312-1320. https://doi.org/10.3892/ijo.2017.3878