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Article

Myeloid cell leukemia-1 regulates the cell growth and predicts prognosis in gastric cancer

  • Authors:
    • Wan-Sik Lee
    • Young-Lan Park
    • Nuri Kim
    • Hyung-Hoon Oh
    • Dong-Jun Son
    • Mi-Young Kim
    • Chan-Young Oak
    • Cho-Yun Chung
    • Hyung-Chul Park
    • Jong-Sun Kim
    • Dae-Seong Myung
    • Sung-Bum Cho
    • Young-Eun Joo
  • View Affiliations / Copyright

    Affiliations: Department of Internal Medicine, Chonnam National University Medical School, Dong-ku, Gwangju 501-757, Republic of Korea
  • Pages: 2154-2162
    |
    Published online on: February 10, 2015
       https://doi.org/10.3892/ijo.2015.2890
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Abstract

The expression of myeloid cell leukemia-1 (Mcl‑1), a member of the anti-apoptotic Bcl-2 protein family, has been associated with tumor progression and adverse patient outcome. The aims of current study were to evaluate whether Mcl-1 affects the survival or death of gastric cancer cells, and to investigate the prognostic value of its expression in gastric cancer. PcDNA3.1-Mcl-1 expression and Mcl-1 siRNA vectors were used to overexpress and silence Mcl-1 expression in gastric cancer cell lines including SNU638 and TMK1, respectively. Immunohistochemistry was used to determine the expression of Mcl-1 in gastric cancer tissues. Apoptosis was determined by the TUNEL assay, and cell proliferation was determined by immunostaining with a Ki-67 antibody. Mcl-1 knockdown induced apoptosis through the upregulation of caspase-3, and -7, and PARP activity, and the release of Smac/DIABLO and Omi/HtrA2 into the cytoplasm. Additionally, cell cycle arrest occurred due to decrease of cyclin D1, cell division cycle gene 2 (cdc2), and cyclin-dependent kinase 4 and 6. In contrast, overexpression of Mcl-1 inhibited apoptosis and cell cycle arrest. Mcl-1 knockdown did not suppress tumor cell proliferation in gastric cancer cells, whereas overexpression of Mcl-1 enhanced tumor cell proliferation. The JAK2 and STAT3 signaling cascades were significantly blocked by Mcl-1 knockdown. The mean Ki-67 labeling index (KI) value of Mcl-1 positive tumors was significantly lower than that of Mcl-1 negative tumors. However, there was no significant difference between Mcl-1 expression and the apoptotic index (AI). Mcl-1 expression was significantly increased in gastric cancer tissues compared to normal gastric mucosa tissues, and was associated with age, tumor size, stage, depth of invasion, lymph node metastasis and poor survival. Our study showed that Mcl-1 regulates the cell growth and might be a potential prognostic marker for gastric cancer.
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Copy and paste a formatted citation
Spandidos Publications style
Lee W, Park Y, Kim N, Oh H, Son D, Kim M, Oak C, Chung C, Park H, Kim J, Kim J, et al: Myeloid cell leukemia-1 regulates the cell growth and predicts prognosis in gastric cancer. Int J Oncol 46: 2154-2162, 2015.
APA
Lee, W., Park, Y., Kim, N., Oh, H., Son, D., Kim, M. ... Joo, Y. (2015). Myeloid cell leukemia-1 regulates the cell growth and predicts prognosis in gastric cancer. International Journal of Oncology, 46, 2154-2162. https://doi.org/10.3892/ijo.2015.2890
MLA
Lee, W., Park, Y., Kim, N., Oh, H., Son, D., Kim, M., Oak, C., Chung, C., Park, H., Kim, J., Myung, D., Cho, S., Joo, Y."Myeloid cell leukemia-1 regulates the cell growth and predicts prognosis in gastric cancer". International Journal of Oncology 46.5 (2015): 2154-2162.
Chicago
Lee, W., Park, Y., Kim, N., Oh, H., Son, D., Kim, M., Oak, C., Chung, C., Park, H., Kim, J., Myung, D., Cho, S., Joo, Y."Myeloid cell leukemia-1 regulates the cell growth and predicts prognosis in gastric cancer". International Journal of Oncology 46, no. 5 (2015): 2154-2162. https://doi.org/10.3892/ijo.2015.2890
Copy and paste a formatted citation
x
Spandidos Publications style
Lee W, Park Y, Kim N, Oh H, Son D, Kim M, Oak C, Chung C, Park H, Kim J, Kim J, et al: Myeloid cell leukemia-1 regulates the cell growth and predicts prognosis in gastric cancer. Int J Oncol 46: 2154-2162, 2015.
APA
Lee, W., Park, Y., Kim, N., Oh, H., Son, D., Kim, M. ... Joo, Y. (2015). Myeloid cell leukemia-1 regulates the cell growth and predicts prognosis in gastric cancer. International Journal of Oncology, 46, 2154-2162. https://doi.org/10.3892/ijo.2015.2890
MLA
Lee, W., Park, Y., Kim, N., Oh, H., Son, D., Kim, M., Oak, C., Chung, C., Park, H., Kim, J., Myung, D., Cho, S., Joo, Y."Myeloid cell leukemia-1 regulates the cell growth and predicts prognosis in gastric cancer". International Journal of Oncology 46.5 (2015): 2154-2162.
Chicago
Lee, W., Park, Y., Kim, N., Oh, H., Son, D., Kim, M., Oak, C., Chung, C., Park, H., Kim, J., Myung, D., Cho, S., Joo, Y."Myeloid cell leukemia-1 regulates the cell growth and predicts prognosis in gastric cancer". International Journal of Oncology 46, no. 5 (2015): 2154-2162. https://doi.org/10.3892/ijo.2015.2890
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