Clinicopathological analysis of PD-L1 and PD-L2 expression in pulmonary squamous cell carcinoma: Comparison with tumor-infiltrating T cells and the status of oncogenic drivers

被引:176
作者
Kim, Moon-Young [1 ]
Koh, Jaemoon [1 ,2 ]
Kim, Sehui [1 ,2 ]
Go, Heounjeong [3 ]
Jeon, Yoon Kyung [1 ,2 ]
Chung, Doo Hyun [1 ,2 ,4 ]
机构
[1] Seoul Natl Univ Hosp, Dept Pathol, Seoul 110744, South Korea
[2] Seoul Natl Univ, Coll Med, Dept Pathol, Seoul 110799, South Korea
[3] Univ Ulsan, Coll Med, Asan Med Ctr, Dept Pathol, Seoul 138736, South Korea
[4] Seoul Natl Univ, Coll Med, Dept Biomed Sci, Seoul 110799, South Korea
关键词
CD274; Programmed cell death 1 ligand 2; Programmed cell death 1; Squamous cell carcinoma of the lung; MET; Immunotherapy; FACTOR RECEPTOR GENE; COPY NUMBER; PROTEIN EXPRESSION; B7-H1; EXPRESSION; IMMUNE-SYSTEM; LUNG; CANCER; GROWTH; MET; BLOCKADE;
D O I
10.1016/j.lungcan.2015.01.016
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Purpose: Programmed cell death-1 (PD-1)/programmed cell death-ligand-1 (PD-L1) pathway-targeted immunotherapy has beneficial therapeutic effects in pulmonary squamous cell carcinoma (SqCC) patients. However, the expression patterns of PD-1 and PD-1 ligands (PD-Ls) in pulmonary SqCC remain unclear. Moreover, the association between the PD-1/PD-Ls pathway and the status of oncogenic drivers in pulmonary SqCC is unknown. Methods: PD-L1 and PD-L2 expression in tumor cells and the numbers of PD-1(+) and CD8(+) tumor-infiltrating lymphocytes (TILs) were examined in 331 resected SqCC tumors along with matched lymph node metastases from 77 cases using immunohistochemistry. EGFR and FGFR1 and MET expression and genetic status were also examined. Results: PD-L1 and PD-L2 expression was detected in 26.9% and 23.9% of the pulmonary SqCC samples, respectively. PD-L1 and PD-L2 expression was maintained or increased in the metastatic lymph node tumors in 81.1% and 93.5% of the 77 cases, respectively. The numbers of PD-1(+) and CD8(+) TILs were significantly positively correlated (P< 0.001). Cases displaying high PD-Ll expression exhibited consistently high CD8(+) T cell infiltration (P< 0.001), even in subgroup analyses according to age, smoking status, tumor size, lymph node metastasis, stage, and the EGFR, MET and FGFR1 status. Moreover, MET expression in the tumors was significantly correlated with high PD-L2 expression and increased PD-1(+) TILs (P= 0.001 for both). Increased numbers of CD8(+) or PD-1(+) TILs were significantly associated with prolonged disease-free survival of these patients, whereas PD-L1 and PD-L2 expression had no significant prognostic implications. Conclusion: PD-L1 and PD-L2 expression in pulmonary SqCC is associated with an increased number of CD8(+) TILs and increased MET expression, which might provide therapeutic insight into targeting the PD-1/PD-Ls pathway in pulmonary SqCC. (c) 2015 Elsevier Ireland Ltd. All rights reserved.
引用
收藏
页码:24 / 33
页数:10
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