ArticleBMC cancer2023
Clinical significance of serum-derived exosomal PD-L1 expression in patients with advanced pancreatic cancer.
Article in BMC cancer, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 2 of them syntheses that pooled it.
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Who cites it
15 citing papers in PubMed, 2 syntheses or guidelines pooled it, 19 citations in OpenAlex.
- Correlation between exosomal PD-L1 and prognosis in patients with cancer: a systematic review and meta-analysis.Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2025Pooled it
- Clinicopathological and prognostic significance of exosomal PD-L1 in cancer therapy.Biomarkers in medicine · 2025Pooled it
- PD-L1Biomarker research · 2026Article
- Immunotherapy Resistance in Pancreatic Ductal Adenocarcinoma: from Tumor Biology to Biomarker-Guided Strategies.Current oncology reports · 2026Review
- Intracellular PD-L1: Functions, Regulation, and Therapeutic Implications.International journal of biological sciences · 2026Review
- Engineered exosomes: a promising approach for overcoming challenges in pancreatic cancer therapy.Journal of nanobiotechnology · 2025Review
- Current trends in theranostic applications of extracellular vesicles in cancer.Frontiers in oncology · 2025Review
- Exosomal PD-L1 detection in cancer predictive biomarker for response to immune checkpoint blockade therapy.Frontiers in immunology · 2025Review
- Influencing immunity: role of extracellular vesicles in tumor immune checkpoint dynamics.Experimental & molecular medicine · 2024Review
- Shedding Light on the Role of Exosomal PD-L1 (ExoPD-L1) in Cancer Progression: an Update.Cell biochemistry and biophysics · 2024Review
- Article
- Circulating Plasma Exosomal PD-L1 Predicts Prognosis of Head and Neck Squamous Cell Carcinoma After Radiation Therapy.Advances in radiation oncology · 2024Article
- Exosomes: Emerging Insights into the Progression of Pancreatic Cancer.International journal of biological sciences · 2024Review
- Liquid biopsy techniques and pancreatic cancer: diagnosis, monitoring, and evaluation.Molecular cancer · 2023Review
- Serum exosomal circCCDC66 as a potential diagnostic and prognostic biomarker for pituitary adenomas.Frontiers in oncology · 2023Article
Corrections and comments
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Authors and funding
7 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundInteractions between the programmed cell death receptor 1 (PD-1) and its ligand (PD-L1) lead to immune evasion in various tumors and are associated with poor prognosis in patients with pancreatic cancer; however, the roles of PD-L1-containing exosomes in pancreatic cancer is poorly understood. Here, we investigated the correlation between circulating exosomal PD-L1 (exoPD-L1) and PD-L1 expression in tumor tissue, and survival outcomes in patients with advanced PDAC.
methodsExosomes were derived from pre-treatment serum samples isolated using ExoQuick kit from 77 patients with advanced pancreatic cancer. Exosomal PD-L1 (exoPD-L1) was detected by enzyme-linked immunosorbent assay, and matched tumor tissues PD-L1 expression were evaluated by PD-L1 immunohistochemistry (22C3) assay, described with combined positive score. Cutoff value of exoPD-L1 for survival was assessed with receiver operating characteristic curve analysis. Kaplan-Meier analysis was performed to obtain median overall survival (OS), and hazard ratio was estimated using a stratified Cox regression model.
resultsThe median exoPD-L1 serum concentration was 0.16 pg/mg, with undetected levels in seven patients. ExoPD-L1 levels were significantly higher in patients with systemic disease than in those with locally advanced disease (p = 0.023). There was a significantly higher proportion of elevated exoPD-L1 levels in patients with positive PD-L1 expression compared to patients with negative PD-L1 expression (p = 0.001). Patients were classified into groups with low and high exoPD-L1 levels using ROC curve-derived cutoffs (0.165 pg/mg; area under the curve, 0.617; p = 0.078). At a median follow-up of 8.39 months, the median OS was 13.2 (95% CI, 8.17-18.3) and 6.36 months (95% CI, 3.27-9.45) in the low and high exoPD-L1 groups, respectively (HR = 0.61; 95% CI, 0.35-1.04; p = 0.059). ExoPD-L1 levels did not affect the proportion of CD8
conclusionsThe serum-derived exoPD-L1 levels were higher in metastatic pancreatic cancer than locally advanced disease. Collectively, higher serum exoPD-L1 levels in patients with advanced pancreatic cancer suggested worse survival outcomes and may have clinical implications.
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