ArticleCancer immunology, immunotherapy : CII2026
NY-ESO-1 and PD-L1 as biomarkers associated with nivolumab response and outcome in unresectable or recurrent esophageal squamous cell carcinoma: a multicenter biomarker study.
Article in Cancer immunology, immunotherapy : CII, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundProgrammed cell death protein-1 (PD-1) blockade improves survival in esophageal squamous cell carcinoma (ESCC), although only a subset of patients respond. We aimed to identify tumor-related biomarkers associated with response and outcome in patients with unresectable or recurrent ESCC.
methodsThis multicenter retrospective study included 250 patients with unresectable or recurrent ESCC who received nivolumab as second- or later-line therapy. Pretreatment tumor specimens were evaluated by immunohistochemistry for p53, NY-ESO-1, MLH1, and programmed death-ligand 1 (PD-L1). PD-L1 expression was assessed using both tumor proportion score (TPS) and combined positive score (CPS) by using automated digital image analysis. Associations with objective response, progression-free survival (PFS), and overall survival (OS) were analyzed.
resultsNY-ESO-1 expression was significantly associated with response to nivolumab (28.6% vs. 11.1%, P = 0.005) and remained independently associated with response in multivariate analysis (OR 3.32, 95% CI 1.49-7.28, P = 0.0027). PD-L1 expression was also associated with response according to both CPS and TPS. Patients with CPS ≥ 10% showed higher response rates than those with CPS < 10% (24.1% vs. 10.2%, P = 0.003), as well as longer median PFS (2.6 vs. 2.0 months, P = 0.0173) and OS (12.3 vs. 10.4 months, P = 0.0479). In contrast, p53 expression showed no significant association with response or survival, and MLH1 loss was rare.
conclusionsNY-ESO-1 expression was associated with response to nivolumab, while PD-L1 expression, particularly CPS, may provide clinically relevant prognostic information. Integrated assessment of tumor-related biomarkers and the host immune microenvironment may further improve patient stratification in ESCC.
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