1. Association of PD-1/PD-L1 expression and Epstein-–Barr virus infection in patients with invasive breast cancer
- Author
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Wei-tong Zhang, Gui-lu Zhu, Wu-qin Xu, Wei Zhang, Hui-zhen Wang, Ya-bing Wang, and Yong-xiang Li
- Subjects
Breast cancer ,Epstein-Barr virus ,Immunotherapy ,PD-1 ,PD-L1 ,Pathology ,RB1-214 - Abstract
Abstract Purpose Causative factors of breast cancer include infections, such as Epstein–Barr virus (EBV) infection. The aim of this study was to analyze the clinicopathological features of EBV-positive (IBC) and determine if EBV affects programmed cell death receptor 1 (PD-1)/PD ligand 1 (PD-L1) expression in IBC, similar to other EBV-infected tumors with PD-L1/PD-1 expression. Methods We collected 140 samples of IBC tissues and 25 samples of adjacent tissues. All patients were followed-up by telephone from the day of surgery to December 2020. Chromogenic in-situ hybridization was performed to evaluate EBV-encoded RNA (EBER). Immunohistochemistry was performed to evaluate PD-L1 and PD-1 expressions. The correlation between PD1/PDL1 expression and clinicopathological features was also analyzed. Results EBER was detected in 57 of 140 (40.7%) IBC tissues and not detected in any adjacent tissue (P 0.05). The positive rate of PD-1/PD-L1 expression was higher in the EBV-positive group than in the EBV-negative group (P
- Published
- 2022
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