PD-L1 in Combination with CD8+TIL and HIF-1α are Promising Prognosis Predictors of Head and Neck Squamous Cell Carcinoma

Zihan Zhou; Dianbin Mu; Dexian Zhang; Xianbin Zhang; Xingchen Ding; Jia Yang; Xinbin Bai; Man Hu

doi:10.2147/CMAR.S285691

PD-L1 in Combination with CD8⁺TIL and HIF-1α are Promising Prognosis Predictors of Head and Neck Squamous Cell Carcinoma

Cancer Manag Res. 2020 Dec 23:12:13233-13239. doi: 10.2147/CMAR.S285691. eCollection 2020.

Authors

Zihan Zhou^{1

2}, Dianbin Mu³, Dexian Zhang³, Xianbin Zhang², Xingchen Ding², Jia Yang², Xinbin Bai⁴, Man Hu²

Affiliations

¹ Department of Oncology, Weifang Medical University, Weifang, Shandong, People's Republic of China.
² Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, People's Republic of China.
³ Department of Pathology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, People's Republic of China.
⁴ Department of Oncology, Jining Cancer Hospital, Jining, Shandong, People's Republic of China.

Abstract

Objective: The aim of this study was to evaluate the prognosis effect of PD-L1 in combination with CD8⁺ tumor-infiltrating lymphocyte (TIL) or HIF-1α in head and neck squamous cell carcinoma (HNSCC).

Methods: A total of 63 patients who underwent surgical resection were included in this study. The level of PD-L1, CD8⁺ TIL, and HIF-1α was determined by immunohistochemical analysis. The survival of patients was evaluated by Kaplan-Meier analysis. The prognostic power of these parameters was evaluated by C-index.

Results: We observed that the survival of patients, who had a high level of PD-L1 in tumor cells, was significantly shorter than those who had a low level of PD-L1. However, the survival of patients who had a high level of PD-L1 in tumor microenvironment was significantly longer than patients with a low level of PD-L1 in tumor microenvironment. In addition, high level of CD8⁺ tumor-infiltrating lymphocyte or low level of HIF-1α level suggests a better prognosis. Moreover, we observed that PD-L1 in combination with CD8⁺ tumor-infiltrating lymphocyte and HIF-1α could significantly improve the prognostic effect of current TNM stage.

Conclusion: The results of this study suggest that the level of PD-L1, CD8⁺TIL, and HIF-1α are useful prognostic biomarkers for patients with HNSCC. Incorporating these biomarkers into current TNM stage of HNSCC improve the discriminatory capability of TNM stage.

Keywords: CD8+TIL; HIF-1α; HNSCC; PD-L1; prognosis.