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Correlation between tumor microenvironment‑associated factors and the efficacy and prognosis of neoadjuvant therapy for rectal cancer

  • Authors:
    • Siyu Zhang
    • Wenqi Bai
    • Xunan Tong
    • Peng Bu
    • Jing Xu
    • Yanfeng Xi
  • View Affiliations / Copyright

    Affiliations: Department of Pathology, Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China, Department of Colorectal Surgery, Shanxi Provincial Cancer Hospital, Taiyuan, Shanxi 030013, P.R. China, Departent of Surgery, Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China, Department of Pathology, Shanxi Provincial Cancer Hospital, Taiyuan, Shanxi 030013, P.R. China
    Copyright: © Zhang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 1062-1070
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    Published online on: November 9, 2018
       https://doi.org/10.3892/ol.2018.9682
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Abstract

The tumor microenvironment contributes to the survival and development of tumor cells and is therefore a key target for cancer therapy. The tumor microenvironment has unique physical and chemical properties and is associated with inflammation and immunity. To examine the correlation between tumor microenvironment‑associated factors and the efficacy and prognosis of neoadjuvant therapy for rectal cancer, and to compare the differences between two treatments [neoadjuvant chemotherapy (NAC) vs. neoadjuvant chemoradiotherapy (NACR)], an immunohistochemical method was used to measure the expression levels of CD4+ tumor‑infiltrating lymphocytes (TILs), cluster of differentiation (CD)8+TILs, forkhead box P3 (FOXP3)+TILs, cytotoxic T lymphocyte‑associated antigen‑4+TILs and programmed death ligand‑1 (PD‑L1)+TILs in 109 patients with rectal cancer, pre‑ and post‑neoadjuvant therapy. The significance of these protein expression patterns was also analyzed using tissue microarrays, and the prognostic significance of these findings evaluated. The results indicated that high levels of CD4+TILs, CD8+TILs and PD‑L1+TILs may be associated with favorable responses to neoadjuvant therapy, whereas high levels of FOXP3+TILs were associated with poor therapeutic responses. Expression levels of CD8+TILs and FOXP3+TILs following neoadjuvant therapy were independent prognostic factors and affected the total survival of patients subjected to neoadjuvant therapy for the treatment of rectal cancer. Moreover, the effects of NAC and NACR on the tumor microenvironment may be different.
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Copy and paste a formatted citation
Spandidos Publications style
Zhang S, Bai W, Tong X, Bu P, Xu J and Xi Y: Correlation between tumor microenvironment‑associated factors and the efficacy and prognosis of neoadjuvant therapy for rectal cancer. Oncol Lett 17: 1062-1070, 2019.
APA
Zhang, S., Bai, W., Tong, X., Bu, P., Xu, J., & Xi, Y. (2019). Correlation between tumor microenvironment‑associated factors and the efficacy and prognosis of neoadjuvant therapy for rectal cancer. Oncology Letters, 17, 1062-1070. https://doi.org/10.3892/ol.2018.9682
MLA
Zhang, S., Bai, W., Tong, X., Bu, P., Xu, J., Xi, Y."Correlation between tumor microenvironment‑associated factors and the efficacy and prognosis of neoadjuvant therapy for rectal cancer". Oncology Letters 17.1 (2019): 1062-1070.
Chicago
Zhang, S., Bai, W., Tong, X., Bu, P., Xu, J., Xi, Y."Correlation between tumor microenvironment‑associated factors and the efficacy and prognosis of neoadjuvant therapy for rectal cancer". Oncology Letters 17, no. 1 (2019): 1062-1070. https://doi.org/10.3892/ol.2018.9682
Copy and paste a formatted citation
x
Spandidos Publications style
Zhang S, Bai W, Tong X, Bu P, Xu J and Xi Y: Correlation between tumor microenvironment‑associated factors and the efficacy and prognosis of neoadjuvant therapy for rectal cancer. Oncol Lett 17: 1062-1070, 2019.
APA
Zhang, S., Bai, W., Tong, X., Bu, P., Xu, J., & Xi, Y. (2019). Correlation between tumor microenvironment‑associated factors and the efficacy and prognosis of neoadjuvant therapy for rectal cancer. Oncology Letters, 17, 1062-1070. https://doi.org/10.3892/ol.2018.9682
MLA
Zhang, S., Bai, W., Tong, X., Bu, P., Xu, J., Xi, Y."Correlation between tumor microenvironment‑associated factors and the efficacy and prognosis of neoadjuvant therapy for rectal cancer". Oncology Letters 17.1 (2019): 1062-1070.
Chicago
Zhang, S., Bai, W., Tong, X., Bu, P., Xu, J., Xi, Y."Correlation between tumor microenvironment‑associated factors and the efficacy and prognosis of neoadjuvant therapy for rectal cancer". Oncology Letters 17, no. 1 (2019): 1062-1070. https://doi.org/10.3892/ol.2018.9682
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