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Article

Distinct regulatory effect of the p34SEI-1 oncoprotein on cancer metastasis in HER2/neu-positive and -negative cells

  • Authors:
    • Samil Jung
    • Jiyeon Ohk
    • Dongjun Jeong
    • Chengping Li
    • Soonduck Lee
    • Jingjing Duan
    • Changjin Kim
    • Jong-Seok Lim
    • Young Yang
    • Keun-Il Kim
    • Myeong-Sok Lee
  • View Affiliations / Copyright

    Affiliations: Department of Biological Science and Research Center for Women's Diseases, Sookmyung Women's University, Seoul 140-742, Republic of Korea, Department of Pathology, College of Medicine, Soonchunhyang University, Chonan 330-090, Republic of Korea
  • Pages: 189-196
    |
    Published online on: April 28, 2014
       https://doi.org/10.3892/ijo.2014.2403
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Abstract

The p34SEI-1 oncoprotein is involved in a transcriptional regulation, cell cycle regulation, apoptosis, development and many other important cellular functions. Our present study suggests that p34SEI-1 can promote metastasis by enhancing migration and invasion of cancer cells. Consistently, p34SEI-1 expression was found to be increased as the tumor invasiveness progressed in human breast tissues. p34SEI-1 may promote cancer metastasis by activating the PI3K/AKT signaling pathway. In this process, p34SEI-1 activates two different serine/threonine kinases, AKT or ILK, depending on the expression status of HER2/neu oncogene. In HER2/neu suppressed cancer cells, p34SEI-1 promoted metastasis mainly by activating AKT via phosphorylation of the 473 serine residue. In HER2/neu expressing cancer cells, p34SEI-1 overexpression downregulates HER2/neu expression, leading to the activation of another crucial serine/threonine kinase ILK due to phosphorylation of the 178 threonine residue instead of AKT. These results suggest that p34SEI-1 affects cancer metastasis by regulating two different signaling pathways depending on the HER2/neu expression level, in which AKT and ILK modulation can be stimulated by p34SEI-1 overexpression.
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Copy and paste a formatted citation
Spandidos Publications style
Jung S, Ohk J, Jeong D, Li C, Lee S, Duan J, Kim C, Lim J, Yang Y, Kim K, Kim K, et al: Distinct regulatory effect of the p34SEI-1 oncoprotein on cancer metastasis in HER2/neu-positive and -negative cells. Int J Oncol 45: 189-196, 2014.
APA
Jung, S., Ohk, J., Jeong, D., Li, C., Lee, S., Duan, J. ... Lee, M. (2014). Distinct regulatory effect of the p34SEI-1 oncoprotein on cancer metastasis in HER2/neu-positive and -negative cells. International Journal of Oncology, 45, 189-196. https://doi.org/10.3892/ijo.2014.2403
MLA
Jung, S., Ohk, J., Jeong, D., Li, C., Lee, S., Duan, J., Kim, C., Lim, J., Yang, Y., Kim, K., Lee, M."Distinct regulatory effect of the p34SEI-1 oncoprotein on cancer metastasis in HER2/neu-positive and -negative cells". International Journal of Oncology 45.1 (2014): 189-196.
Chicago
Jung, S., Ohk, J., Jeong, D., Li, C., Lee, S., Duan, J., Kim, C., Lim, J., Yang, Y., Kim, K., Lee, M."Distinct regulatory effect of the p34SEI-1 oncoprotein on cancer metastasis in HER2/neu-positive and -negative cells". International Journal of Oncology 45, no. 1 (2014): 189-196. https://doi.org/10.3892/ijo.2014.2403
Copy and paste a formatted citation
x
Spandidos Publications style
Jung S, Ohk J, Jeong D, Li C, Lee S, Duan J, Kim C, Lim J, Yang Y, Kim K, Kim K, et al: Distinct regulatory effect of the p34SEI-1 oncoprotein on cancer metastasis in HER2/neu-positive and -negative cells. Int J Oncol 45: 189-196, 2014.
APA
Jung, S., Ohk, J., Jeong, D., Li, C., Lee, S., Duan, J. ... Lee, M. (2014). Distinct regulatory effect of the p34SEI-1 oncoprotein on cancer metastasis in HER2/neu-positive and -negative cells. International Journal of Oncology, 45, 189-196. https://doi.org/10.3892/ijo.2014.2403
MLA
Jung, S., Ohk, J., Jeong, D., Li, C., Lee, S., Duan, J., Kim, C., Lim, J., Yang, Y., Kim, K., Lee, M."Distinct regulatory effect of the p34SEI-1 oncoprotein on cancer metastasis in HER2/neu-positive and -negative cells". International Journal of Oncology 45.1 (2014): 189-196.
Chicago
Jung, S., Ohk, J., Jeong, D., Li, C., Lee, S., Duan, J., Kim, C., Lim, J., Yang, Y., Kim, K., Lee, M."Distinct regulatory effect of the p34SEI-1 oncoprotein on cancer metastasis in HER2/neu-positive and -negative cells". International Journal of Oncology 45, no. 1 (2014): 189-196. https://doi.org/10.3892/ijo.2014.2403
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