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Article

Expression of early growth response-1 in colorectal cancer and its relation to tumor cell proliferation and apoptosis

  • Authors:
    • Dae-Seong Myung
    • Young-Lan Park
    • Nuri Kim
    • Cho-Yun Chung
    • Hyung-Chul Park
    • Jong-Sun Kim
    • Sung-Bum Cho
    • Wan-Sik Lee
    • Jae-Hyuk Lee
    • Young-Eun Joo
  • View Affiliations / Copyright

    Affiliations: Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Republic of Korea, Department of Pathology, Chonnam National University Medical School, Gwangju, Republic of Korea
  • Pages: 788-794
    |
    Published online on: November 29, 2013
       https://doi.org/10.3892/or.2013.2884
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Abstract

Early growth response-1 (Egr-1) is implicated in the regulation of cell growth, proliferation, differentiation and apoptosis. Egr-1 is considered tobe either a tumor-suppressor or tumor-promoter, depending on the cell type and environment. The aim of the present study was to evaluate the expression of Egr-1 in colorectal cancer and its correlation with tumor cell proliferation, apoptosis and clinicopathological features. The expression of Egr-1 in colorectal cancer tissues was investigated by reverse transcription-polymerase chain reaction (RT-PCR), western blotting and immunohistochemistry. Apoptosis was detected by terminal deoxynucleotidyl transferase (TdT)-mediated deoxyuridine triphosphate (dUTP) nick end labeling (TUNEL), and cellular proliferative activity was evaluated by immunohistochemical staining with the Ki-67 antibody. Egr-1 expression was significantly elevated in colorectal cancer tissues, when compared to that in the paired normal mucosa at the mRNA and protein levels. In addition, Egr-1 expression was significantly increased in the metastatic lymph node tissues, when compared to that in the non‑metastatic lymph node tissues at the protein level. The mean Ki-67 labeling index (KI) and apoptotic index (AI) values for 158 tumors were 53.6±15.4 and 9.0±1.0, respectively. Higher KI values were significantly associated with distant metastasis. Lower AI values were significantly associated with lymph node metastasis. However, KI or AI values were not associated with patient survival. The mean KI value of Egr-1-positive tumors was significantly higher than that of Egr-1-negative tumors. However, there was no significant difference between Egr-1 expression and AI value. Positive expression of Egr-1 was significantly associated with age, lymphovascular invasion, lymph node and distant metastasis, tumor stage and poor survival. These results indicate that Egr-1 may be associated with colorectal cancer progression via tumor cell proliferation.
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Copy and paste a formatted citation
Spandidos Publications style
Myung D, Park Y, Kim N, Chung C, Park H, Kim J, Cho S, Lee W, Lee J, Joo Y, Joo Y, et al: Expression of early growth response-1 in colorectal cancer and its relation to tumor cell proliferation and apoptosis. Oncol Rep 31: 788-794, 2014.
APA
Myung, D., Park, Y., Kim, N., Chung, C., Park, H., Kim, J. ... Joo, Y. (2014). Expression of early growth response-1 in colorectal cancer and its relation to tumor cell proliferation and apoptosis. Oncology Reports, 31, 788-794. https://doi.org/10.3892/or.2013.2884
MLA
Myung, D., Park, Y., Kim, N., Chung, C., Park, H., Kim, J., Cho, S., Lee, W., Lee, J., Joo, Y."Expression of early growth response-1 in colorectal cancer and its relation to tumor cell proliferation and apoptosis". Oncology Reports 31.2 (2014): 788-794.
Chicago
Myung, D., Park, Y., Kim, N., Chung, C., Park, H., Kim, J., Cho, S., Lee, W., Lee, J., Joo, Y."Expression of early growth response-1 in colorectal cancer and its relation to tumor cell proliferation and apoptosis". Oncology Reports 31, no. 2 (2014): 788-794. https://doi.org/10.3892/or.2013.2884
Copy and paste a formatted citation
x
Spandidos Publications style
Myung D, Park Y, Kim N, Chung C, Park H, Kim J, Cho S, Lee W, Lee J, Joo Y, Joo Y, et al: Expression of early growth response-1 in colorectal cancer and its relation to tumor cell proliferation and apoptosis. Oncol Rep 31: 788-794, 2014.
APA
Myung, D., Park, Y., Kim, N., Chung, C., Park, H., Kim, J. ... Joo, Y. (2014). Expression of early growth response-1 in colorectal cancer and its relation to tumor cell proliferation and apoptosis. Oncology Reports, 31, 788-794. https://doi.org/10.3892/or.2013.2884
MLA
Myung, D., Park, Y., Kim, N., Chung, C., Park, H., Kim, J., Cho, S., Lee, W., Lee, J., Joo, Y."Expression of early growth response-1 in colorectal cancer and its relation to tumor cell proliferation and apoptosis". Oncology Reports 31.2 (2014): 788-794.
Chicago
Myung, D., Park, Y., Kim, N., Chung, C., Park, H., Kim, J., Cho, S., Lee, W., Lee, J., Joo, Y."Expression of early growth response-1 in colorectal cancer and its relation to tumor cell proliferation and apoptosis". Oncology Reports 31, no. 2 (2014): 788-794. https://doi.org/10.3892/or.2013.2884
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