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The significance of Siglec-15 expression in resectable non-small cell lung cancer

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Jian-Qing Hao, Jing-Ying Nong, Dan Zhao, Hao-Yang Li, Dan Su, Li-Juan Zhou, Yu-Jie Dong, Chen Zhang, Nan-Ying Che, Shu-Cai Zhang, Ji-Zhen Lin,  Jian-Bo Yang,  Hong-Tao Zhang,  Jing-Hui Wang

Abstract:

Siglec-15 (S15) is another important mechanism of tumor immune escape besides the PD-L1/PD-1 pathway and represents a new kind of immune checkpoint inhibitor. However, the associations of tumor Siglec-15 expression with clinicopathological characteristics and outcomes of non-small cell lung cancer (NSCLC), and tumor-infiltrating lymphocytes (TILs) in a tumor microenvironment (TME) have so far been unclear. A total of 324 NSCLC surgical samples on tumor microarray were used in this study for investigating the association of S15 expression with clinicopathological characteristics and overall survival (OS) as well as correlation with TILs using multiplex immunofluorescence staining and PD-L1. Results showed that the expression of S15 in adenocarcinoma was significantly higher than that in squamous cell carcinoma. S15 expression was positively correlated with CD8+ T cell density in the stroma. The expression rate of PD-L1 in lung squamous cell carcinoma was higher than that in lung adenocarcinoma. S15 expression was not associated with the prognosis of early NSCLC. The pathological mechanism of the co-expression of S15 and PD-L1 in resectable NSCLC remains to be further studied.

Received date: 02/20/2020

Accepted date: 04/29/2020

Ahead of print publish date: 08/05/2020

Issue: 6/2020

Volume: 67

Pages: 1214 — 1222

Keywords: NSCLC, Siglec-15, TILs, Multiplex immunofluorescence staining

Supplementary files:
Supplementary Tables 1-4.pdf

DOI: 10.4149/neo_2020_200220N161

Pubmed

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