| Autor: |
Yiyin Zhang, Jin Xu, Jie Hua, Jiang Liu, Chen Liang, Qingcai Meng, Miaoyan Wei, Bo Zhang, Xianjun Yu, Si Shi |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Journal for ImmunoTherapy of Cancer, Vol 7, Iss 1, Pp 1-13 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
2051-1426 |
| DOI: |
10.1186/s40425-019-0703-0 |
| Popis: |
Abstract Background Programmed cell death protein 1 (PD-1) is a key immune checkpoint that regulates peripheral tolerance and protects against autoimmunity. Programmed death ligand-2 (PD-L2) is a less studied ligand to PD-1 and has yet to be fully explored, especially in pancreatic ductal adenocarcinoma (PDAC). Methods In this study, we performed immunohistochemistry to detect the PD-L2, CD3, CD8, transforming growth factor-β2 (TGF-β2) and FOXP3 levels in paraffin sections from 305 patients with resected PDAC as a training set. Expression levels of intratumoral and stromal immune markers were compared in relation to survival using Kaplan-Meier curves, random survival forest model and survival tree analysis. A multivariable Cox proportional-hazards model of associated markers was used to calculate the risk scores. Results PD-L2 was expressed in 71.5% of PDAC samples and showed strong correlations with CD3+, CD8+ T cells and FOXP3+ regulatory T cell densities. High levels of intratumoral PD-L2 and FOXP3 were related to poor survival; only stromal FOXP3 overexpression was associated with worse prognosis. Four patterns generated from survival tree analysis demonstrated that PD-L2low stromalFOXP3low patients had the longest survival, while PD-L2high intratumoralCD3low patients had the shortest survival (P |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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