Exosomal PD-L1 and lactate versus tissue PD-L1 as biomarkers for clinical outcomes of PD-1 Blockade plus chemotherapy in metastatic esophagogastric signet ring cell carcinoma.

ABSTRACT: In this investigator-initiated, prospective, exploratory study, biomarkers predictive of clinical outcomes of first-line immune checkpoint inhibitor (ICI, nivolumab or pembrolizumab) plus XELOX(oxaliplatin and capecitabine) were identified in human epidermal growth factor receptor 2 (HER2)-negative patients with metastatic esophagogastric signet ring cell carcinoma. The findings showed an objective response rate (ORR) of 51.5% and a disease control rate of 86.8%, the median progression-free survival (PFS) for the entire cohort was 6.63 months. PD-L1 expression level in tumor tissues could not identify a high PD-L1 group that significantly benefited from ICI plus XELOX in terms of the ORR and PFS. By contrast, the patients expressing low exosomal PD-L1 or lactate in peripheral blood plasma

SUBMITTER: Tian Y 

PROVIDER: S-EPMC11905711 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature