Investigating the impact of the inflammatory immune microenvironment and steroids or COX-2 inhibitors usage on immunotherapy in advanced esophageal squamous cell carcinoma (ESCC): a propensity score matched analysis

The research aimed to evaluate the connection between pre-treatment inflammatory biomarkers and clinical results in advanced esophageal squamous cell carcinoma (ESCC) receiving immune checkpoint inhibitors.

Between 2019 and 2022, we analyzed 354 individuals diagnosed with metastatic ESCC who underwent immunotherapy. The study sought to evaluate the impact of specific inflammatory biomarkers (Neutrophil/Lymphocyte Ratio (NLR), C-reactive protein to albumin ratio (CRP/ALB) and Glasgow Prognostic Score (GPS), Cyclooxygenase-2 (COX-2) inhibitors or steroids usage on the effectiveness and survival outcomes of immunotherapy in advanced ESCC. The research utilized Kaplan‒Meier and Cox regression models alongside propensity score matching for analysis.

The findings revealed that elevated pre-treatment NLR (11.0 vs. 14.6 months, p = 0.021) and CRP/ALB (11.4 vs. 14.6 months, p = 0.022) levels were significantly associated with poorer overall survival (OS) outcomes, while the use of steroids did not show a significant difference in OS (15.5 vs. 15.4 months, p = 0.685) between groups. Similarly, no notable disparity in OS was observed between patients treated withCOX-2 inhibitors and those who were not (13.8 vs. 11.0 months, p = 0.054).

Lower levels of NLR and CRP/ALB prior to treatment were linked to better effectiveness and OS in immunotherapy for advanced ESCC. The study did not identify a significant relationship between OS in patients with esophageal cancer and the use of either steroids or COX-2 inhibitors.