PD-L1 and immune infiltrates are differentially expressed in distinct subgroups of gastric cancer
| Autor: | H. K. Angell, J. Lee, K-M. Kim, K. Kim, S-T. Kim, S. H. Park, W. K. Kang, A. Sharpe, J. Ogden, A. Davenport, D. R. Hodgson, J. C. Barrett, E. Kilgour |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | OncoImmunology, Vol 8, Iss 2 (2019) |
| Druh dokumentu: | article |
| ISSN: | 2162-402X 2162402X |
| DOI: | 10.1080/2162402X.2018.1544442 |
| Popis: | This study investigates the association of PD-L1 expression and immune cell infiltrates and their impact on clinical outcome, in addition to their overlap with microsatellite instability (MSI), HER2 and ATM molecular subgroups of gastric cancer (GC). PD-L1 membrane expression on tumour cells (TC) and infiltrating immune cells (IC), CD3 + T-lymphocytes, CD8+ cytotoxic T-cells, ATM and HER2 were assessed by immunohistochemistry (IHC) in the ACRG (Asian Cancer Research Group) GC cohort (N = 380). EBV status was determined using in situ hybridization and MSI status was performed using PCR and MLH1 IHC. The PD-L1 segment was associated with increased T-cell infiltrates, while the MSI-high segment was enriched for PD-L1, CD3, and CD8. Multivariate analysis confirmed PD-L1 positivity, high CD3 and high CD8 as independent prognostic factors for both disease-free survival and overall survival (all p |
| Databáze: | Directory of Open Access Journals |
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