Soluble PD-L1 Expression in Circulation as a Predictive Marker for Recurrence and Prognosis in Gastric Cancer: Direct Comparison of the Clinical Burden Between Tissue and Serum PD-L1 Expression.
Ann Surg Oncol
; 26(3): 876-883, 2019 Mar.
Article
en En
| MEDLINE
| ID: mdl-30565045
ABSTRACT
BACKGROUND:
This study assessed programmed cell death ligand 1 (PD-L1) expression in primary tissues and soluble PD-L1 (sPD-L1) concentration in matched preoperative serum in gastric cancer (GC) patients to perform direct comparison between tissue and serum PD-L1 expression and to clarify the prognostic implication in GC.METHODS:
The study enrolled 180 GC patients who underwent surgery for GC at the authors' institution. The study evaluated tissue PD-L1 expression using immunohistochemistry and quantified sPD-L1 concentration in preoperative serum using enzyme-linked immunosorbent assay in GC patients.RESULTS:
The findings showed that PD-L1 was overexpressed in GC tissues compared with normal mucosa. Tissue PD-L1 expression was significantly higher in the GC patients with advanced T stage, presence of lympho-vascular invasion, lymph node metastasis, and peritoneal metastasis. Furthermore, elevated tissue PD-L1 expression was significantly associated with poor prognosis for overall survival (OS) and disease-free survival (DFS). Serum sPD-L1 was significantly higher in the GC patients than in the healthy volunteers. Although serum sPD-L1 was not correlated with any clinicopathologic factors, the patients with high serum sPD-L1 showed poorer OS and DFS than those with low sPD-L1. Multivariate analyses showed that both elevated tissue PD-L1 and serum sPD-L1 were independent prognostic factors for poor OS [tissue PD-L1 hazard ratio (HR), 4.28; 95% confidence interval (CI), 1.43-12.8; P = 0.0094 vs. serum sPD-L1 HR, 11.2; 95% CI, 3.44-36.7; P = 0.0001] and poor DFS (tissue PD-L1 HR, 6.96; 95% CI, 2.48-19.6; P = 0.0002 vs. serum sPD-L1 HR, 8.7; 95% CI, 3.16-23.9; P < 0.0001) for the GC patients. Furthermore, infiltrative CD8- and Foxp3-positive T cells were significantly increased in the GC patients with elevated tissue PD-L1 expression.CONCLUSION:
Both serum sPD-L1 and tissue PD-L1 expression may serve as predictive biomarkers for recurrence and prognosis in GC patients.
Texto completo:
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Bases de datos:
MEDLINE
Asunto principal:
Neoplasias Peritoneales
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Neoplasias Gástricas
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Biomarcadores de Tumor
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Antígeno B7-H1
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Recurrencia Local de Neoplasia
Tipo de estudio:
Observational_studies
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Prognostic_studies
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Risk_factors_studies
Límite:
Aged
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Female
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Humans
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Male
Idioma:
En
Revista:
Ann Surg Oncol
Asunto de la revista:
NEOPLASIAS
Año:
2019
Tipo del documento:
Article
País de afiliación:
Japón