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Article

Early evaluation of the apoptotic index ratio is useful in predicting the efficacy of chemoradiotherapy in esophageal squamous cell carcinoma

  • Authors:
    • Jun Sobajima
    • Kensuke Kumamoto
    • Norihiro Haga
    • Junichi Tamaru
    • Takeo Takahashi
    • Tatsuya Miyazaki
    • Hideyuki Ishida
  • View Affiliations / Copyright

    Affiliations: Department of Digestive Tract and General Surgery, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama 350-8550, Japan, Department of Pathology, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama 350-8550, Japan, Department of Radiation Oncology, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama 350-8550, Japan, Department of General Surgical Science, Gunma University Graduate School, Graduate School of Medicine, Gunma, Japan
  • Pages: 287-292
    |
    Published online on: November 2, 2011
       https://doi.org/10.3892/ol.2011.468
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Abstract

Chemoradiotherapy for advanced esophageal cancer is a standard treatment alongside surgical treatment. Although numerous investigators have attempted to identify the predictive markers for chemoradiosensitivity, there appear to be few candidates that can be applied in clinical use. Using biopsy specimens, we investigated the apoptotic index (AI) prior to treatment and following a radiation dose of 10 Gy to detect the early response to chemoradiotherapy in 28 patients with esophageal squamous cell carcinoma. Molecular markers, including p53, p21, bax, bcl-2, HSP27, HSP70, HSP90, Ku70, Ku86 and HIF-1α, were also examined by immunohistochemical staining. The patients were divided into two groups depending on the response to chemoradiotherapy: a responder group (RG) (n=19) that included the patients with complete or partial response, and a non-responder group (NRG) (n=9), that included patients with stable or progressive disease. In the RG and NRG, the AI of pretreatment was 4.7±5.3 (mean ± SD, cells/1,000 cells) and 5.9±3.7, respectively. The apoptotic index ratio (AIR), which was determined by dividing the AI following 10 Gy radiation by the pretreatment AI, was higher in the RG compared to the NRG (4.7±4.5 versus 1.9±1.4, p=0.03). When the cut-off value of AIR was set at 2.4, the sensitivity, specificity and accuracy were 74, 78 and 76%, respectively. Among the molecular markers we examined immunohistochemically, a positive p53 expression in the pretreatment evaluation was associated with the efficacy of chemoradiotherapy (p=0.08). Regarding the expression of other molecular markers, no significant correlations were found in RG and NRG. In the present study, the results indicated that AIR is useful for the prediction of chemoradiosensitivity in esophageal squamous cell carcinoma.
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Copy and paste a formatted citation
Spandidos Publications style
Sobajima J, Kumamoto K, Haga N, Tamaru J, Takahashi T, Miyazaki T and Ishida H: Early evaluation of the apoptotic index ratio is useful in predicting the efficacy of chemoradiotherapy in esophageal squamous cell carcinoma. Oncol Lett 3: 287-292, 2012.
APA
Sobajima, J., Kumamoto, K., Haga, N., Tamaru, J., Takahashi, T., Miyazaki, T., & Ishida, H. (2012). Early evaluation of the apoptotic index ratio is useful in predicting the efficacy of chemoradiotherapy in esophageal squamous cell carcinoma. Oncology Letters, 3, 287-292. https://doi.org/10.3892/ol.2011.468
MLA
Sobajima, J., Kumamoto, K., Haga, N., Tamaru, J., Takahashi, T., Miyazaki, T., Ishida, H."Early evaluation of the apoptotic index ratio is useful in predicting the efficacy of chemoradiotherapy in esophageal squamous cell carcinoma". Oncology Letters 3.2 (2012): 287-292.
Chicago
Sobajima, J., Kumamoto, K., Haga, N., Tamaru, J., Takahashi, T., Miyazaki, T., Ishida, H."Early evaluation of the apoptotic index ratio is useful in predicting the efficacy of chemoradiotherapy in esophageal squamous cell carcinoma". Oncology Letters 3, no. 2 (2012): 287-292. https://doi.org/10.3892/ol.2011.468
Copy and paste a formatted citation
x
Spandidos Publications style
Sobajima J, Kumamoto K, Haga N, Tamaru J, Takahashi T, Miyazaki T and Ishida H: Early evaluation of the apoptotic index ratio is useful in predicting the efficacy of chemoradiotherapy in esophageal squamous cell carcinoma. Oncol Lett 3: 287-292, 2012.
APA
Sobajima, J., Kumamoto, K., Haga, N., Tamaru, J., Takahashi, T., Miyazaki, T., & Ishida, H. (2012). Early evaluation of the apoptotic index ratio is useful in predicting the efficacy of chemoradiotherapy in esophageal squamous cell carcinoma. Oncology Letters, 3, 287-292. https://doi.org/10.3892/ol.2011.468
MLA
Sobajima, J., Kumamoto, K., Haga, N., Tamaru, J., Takahashi, T., Miyazaki, T., Ishida, H."Early evaluation of the apoptotic index ratio is useful in predicting the efficacy of chemoradiotherapy in esophageal squamous cell carcinoma". Oncology Letters 3.2 (2012): 287-292.
Chicago
Sobajima, J., Kumamoto, K., Haga, N., Tamaru, J., Takahashi, T., Miyazaki, T., Ishida, H."Early evaluation of the apoptotic index ratio is useful in predicting the efficacy of chemoradiotherapy in esophageal squamous cell carcinoma". Oncology Letters 3, no. 2 (2012): 287-292. https://doi.org/10.3892/ol.2011.468
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