Open Access

Prognostic impact of programmed cell death ligand 1 expression on long‑term oncologic outcomes in colorectal cancer

  • Authors:
    • Sung Uk Bae
    • Woon Kyung Jeong
    • Seong Kyu Baek
    • Nam Kyu Kim
    • Ilseon Hwang
  • View Affiliations

  • Published online on: August 3, 2018     https://doi.org/10.3892/ol.2018.9264
  • Pages: 5214-5222
  • Copyright: © Bae et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

The present study evaluated the association between programmed cell death ligand‑1 (PD‑L1) expression and long‑term oncologic outcomes in colorectal cancer (CRC). PD‑L1 expression was evaluated using immunohistochemistry in 175 patients who underwent surgical resection for CRC between September 1999 and August 2004. Patients were grouped according to PD‑L1 expression, with 82 (46.9%) and 93 (53.1%) in the low and high PD‑L1 expression groups, respectively. The overall survival (OS) and disease‑free survival (DFS) rates were significantly better in the high expression group compared with in the low expression group (OS: 48.2 vs. 32.9%, P=0.047; DFS: 43.3 vs. 32.9%, P=0.021). According to the Tumor‑Node‑Metastasis stage subgroups, the OS rates in the low and high expression groups, respectively, were 66.7 and 60.0% in stage I (P=0.715), 51.8 and 46.7% in stage II (P=0.789), 19.6 and 51.1% in stage III (P=0.011) and 9.1 and 0% in stage IV (P=0.005). The DFS rates in the low and high expression groups, respectively, were 66.7 and 60.0% in stage I (P=0.715), 51.8 and 46.7% in stage II (P=0.857), 19.6 and 38.3% in stage III (P=0.006) and 9.1 and 0% in stage IV (P=0.700). The systemic recurrence rate was significantly higher in the low expression group compared with in the high expression group (42.7 vs. 12.9%, respectively, P=0.030). Low PD‑L1 expression was significantly associated with tumor relapse and poor prognosis in stage III CRC.
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October-2018
Volume 16 Issue 4

Print ISSN: 1792-1074
Online ISSN:1792-1082

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Spandidos Publications style
Bae SU, Jeong WK, Baek SK, Kim NK and Hwang I: Prognostic impact of programmed cell death ligand 1 expression on long‑term oncologic outcomes in colorectal cancer. Oncol Lett 16: 5214-5222, 2018
APA
Bae, S.U., Jeong, W.K., Baek, S.K., Kim, N.K., & Hwang, I. (2018). Prognostic impact of programmed cell death ligand 1 expression on long‑term oncologic outcomes in colorectal cancer. Oncology Letters, 16, 5214-5222. https://doi.org/10.3892/ol.2018.9264
MLA
Bae, S. U., Jeong, W. K., Baek, S. K., Kim, N. K., Hwang, I."Prognostic impact of programmed cell death ligand 1 expression on long‑term oncologic outcomes in colorectal cancer". Oncology Letters 16.4 (2018): 5214-5222.
Chicago
Bae, S. U., Jeong, W. K., Baek, S. K., Kim, N. K., Hwang, I."Prognostic impact of programmed cell death ligand 1 expression on long‑term oncologic outcomes in colorectal cancer". Oncology Letters 16, no. 4 (2018): 5214-5222. https://doi.org/10.3892/ol.2018.9264