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Article

Predictive value of Smac, VEGF and Ki-67 in rectal cancer treated with neoadjuvant therapy

  • Authors:
    • Hongjiang Yan
    • Renben Wang
    • Jinming Yu
    • Shumei Jiang
    • Kunli Zhu
    • Dianbin Mu
    • Zhongfa Xu
  • View Affiliations / Copyright

    Affiliations: Department of Radiation Oncology, Shandong Tumor Hospital, Jinan 250117, P.R. China
  • Pages: 641-647
    |
    Published online on: July 1, 2010
       https://doi.org/10.3892/ol_00000113
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Abstract

The present study aimed to identify whether second mitochondria-derived activator of caspase (Smac), vascular endothelial growth factor (VEGF) and proliferating cell nuclear antigen (Ki-67) expression in pre-treatment tumor biopsies are useful predictive markers of tumor response in patients with rectal cancer undergoing pre-operative chemoradiotherapy (CRT). Paraffin-embedded tissues obtained before and after therapy were evaluated by immunohistochemical staining for Smac, VEGF and Ki-67. The study evaluated the correlation of Smac, VEGF and Ki-67 immunoreactivity in tumor biopsies before treatment of tumor response to pre-operative CRT. Regarding Smac, patients with a favorable response to neoadjuvant CRT had higher pre-therapy levels (p=0.011). The level of Smac expression decreased after neoadjuvant therapy (p=0.044). However, VEGF expression was found to be negatively and significantly correlated with a favorable tumor response to neoadjuvant CRT (p=0.010). A transient increase in VEGF expression was detected in the resected specimens following neoadjuvant therapy (p=0.030). In addition, tumors with a low Ki-67 labeling index (Ki-67-LI) expression were found to be more sensitive to neoadjuvant therapy than those with a high expression of Ki-67-LI (p=0.034). In contrast to VEGF, the Ki-67 expression level decreased after neoadjuvant therapy. Smac, VEGF and Ki-67 expression levels, assessed immunohistochemically from pre-treatment tumor biopsies, may be useful predictive markers of rectal tumor response to pre-operative CRT.
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Copy and paste a formatted citation
Spandidos Publications style
Yan H, Wang R, Yu J, Jiang S, Zhu K, Mu D and Xu Z: Predictive value of Smac, VEGF and Ki-67 in rectal cancer treated with neoadjuvant therapy . Oncol Lett 1: 641-647, 2010.
APA
Yan, H., Wang, R., Yu, J., Jiang, S., Zhu, K., Mu, D., & Xu, Z. (2010). Predictive value of Smac, VEGF and Ki-67 in rectal cancer treated with neoadjuvant therapy . Oncology Letters, 1, 641-647. https://doi.org/10.3892/ol_00000113
MLA
Yan, H., Wang, R., Yu, J., Jiang, S., Zhu, K., Mu, D., Xu, Z."Predictive value of Smac, VEGF and Ki-67 in rectal cancer treated with neoadjuvant therapy ". Oncology Letters 1.4 (2010): 641-647.
Chicago
Yan, H., Wang, R., Yu, J., Jiang, S., Zhu, K., Mu, D., Xu, Z."Predictive value of Smac, VEGF and Ki-67 in rectal cancer treated with neoadjuvant therapy ". Oncology Letters 1, no. 4 (2010): 641-647. https://doi.org/10.3892/ol_00000113
Copy and paste a formatted citation
x
Spandidos Publications style
Yan H, Wang R, Yu J, Jiang S, Zhu K, Mu D and Xu Z: Predictive value of Smac, VEGF and Ki-67 in rectal cancer treated with neoadjuvant therapy . Oncol Lett 1: 641-647, 2010.
APA
Yan, H., Wang, R., Yu, J., Jiang, S., Zhu, K., Mu, D., & Xu, Z. (2010). Predictive value of Smac, VEGF and Ki-67 in rectal cancer treated with neoadjuvant therapy . Oncology Letters, 1, 641-647. https://doi.org/10.3892/ol_00000113
MLA
Yan, H., Wang, R., Yu, J., Jiang, S., Zhu, K., Mu, D., Xu, Z."Predictive value of Smac, VEGF and Ki-67 in rectal cancer treated with neoadjuvant therapy ". Oncology Letters 1.4 (2010): 641-647.
Chicago
Yan, H., Wang, R., Yu, J., Jiang, S., Zhu, K., Mu, D., Xu, Z."Predictive value of Smac, VEGF and Ki-67 in rectal cancer treated with neoadjuvant therapy ". Oncology Letters 1, no. 4 (2010): 641-647. https://doi.org/10.3892/ol_00000113
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